Author Interviews, CT Scanning, Heart Disease, JACC / 07.03.2017

MedicalResearch.com Interview with: Won Young Kim, MD Department of Emergency Medicine Ulsan University College of Medicine Asan Medical Center Seoul, Korea MedicalResearch.com: What is the background for this study? Response: The current advanced cardiac life support guidelines recommended emergent percutaneous intervention for out-of-hospital cardiac arrest (OHCA) survivors with ST-segment elevation and suspected cardiac origin without ST-segment elevation. However, spontaneous subarachnoid hemorrhage (SAH) is a well-known cause of cardiac arrest, and its electrocardiogram may mimic myocardial infarction or ischemia. The need and timing for brain computed tomography in non-traumatic OHCA remain controversial. The present study aimed at determining the role of the post-resuscitation ECG in patients with significant ST-segment changes on initial ECG to investigate the difference in post-resuscitation ECG characteristics between OHCA patients with SAH and those with suspected cardiac origin of OHCA. (more…)
ADHD, Author Interviews, Lancet, MRI, Neurological Disorders / 01.03.2017

MedicalResearch.com Interview with: M. (Martine) Hoogman PhD. Postdoc and PI of ENIGMA-ADHD Radboud universitair medisch centrum Department of Human Genetics Nijmegen, The Netherlands MedicalResearch.com: What is the background for this study? What are the main findings? Response: There are many neuro-imaging studies aimed at investigating structural brain changes related to ADHD, but the results are often inconclusive. There are two main reasons for this: 1) the small sample size of the studies and 2) the heterogeneous methods used. We tried to address these issues by forming an international collaboration to provide a sample size sufficient to detect even small effects in volume differences. And in addition, we analyzed all the raw scans again using homogenized methods. There are data of more than 1700 patients (aged 4-63 years of age) and more than 1500 healthy controls in our dataset, coming from 23 sites around the world. We studied the possible volume differences between cases and controls of 7 subcortical regions and intracranial volume by performing mega- and meta-analysis. (more…)
Author Interviews, Heart Disease, MRI, NEJM / 25.02.2017

MedicalResearch.com Interview with: Robert Russo, MD, PhD, FACC The Scripps Research Institute The La Jolla Cardiovascular Research Institute  MedicalResearch.com: What is the background for this study? Response: For an estimated 2 million people in the United States and an additional 6 million people worldwide, the presence of a non-MRI-conditional pacemaker or implantable cardioverter defibrillator (ICD) is considered a contraindication to magnetic resonance imaging. This creates a dilemma for at least half of these patients, who are predicted to require an MRI scan during their lifetime after a cardiac device has been implanted. Safety concerns for patients with an implanted cardiac device undergoing MRI are related to the potential for magnetic field-induced cardiac lead heating resulting in myocardial thermal injury, and a detrimental change in pacing properties. As a result, patients with an implanted device have long been denied access to MRI, although it may have been the most appropriate diagnostic imaging modality for their clinical care. Despite the development of MRI-conditional cardiac devices, a strategy for mitigating risks for patients with non MRI-conditional devices and leads will remain an enduring problem for the foreseeable future due to an ever increasing demand for MRI and the large number of previously and currently implanted non-MRI-conditional devices. (more…)
AACR, Author Interviews, Breast Cancer, Cancer Research, Mammograms / 10.02.2017

MedicalResearch.com Interview with: Firas Dabbous, PhD Manager, Patient Centered Outcomes Research Russell Institute for Research & Innovation Advocate Lutheran General Hospital Park Ridge, IL  MedicalResearch.com: What is the background for this study? Response: When women are told that there is something abnormal on their screening mammogram that can cause stress and worry while undergoing additional testing, even when they are later told that there is nothing wrong. We wanted to know if receiving a false positive screening mammogram would cause women to think twice before getting their next screening mammogram, and maybe delay coming back for their next screen. This is important because patients who have a false positive experience may have higher chance to develop breast cancer at a later point in time. Therefore, it is important to understand their screening patterns to better educate and inform them about the importance of adhering to mammography guidelines and emphasize the importance of returning on schedule for their next screens. (more…)
Author Interviews, Cancer Research, CT Scanning, JAMA, Lung Cancer / 02.02.2017

MedicalResearch.com Interview with: Ahmedin Jemal, DVM, PHD Vice President, Surveillance and Health Services Research American Cancer Society, Inc. 250 Williams St. Atlanta, GA 30303 MedicalResearch.com: What is the background for this study? Response: In December 2013, the United States Preventive Services Task Force (USPSTF) recommended annual screening for lung cancer with low dose computed tomography (LDCT) for current or former heavy smokers who quit within the past 15 years. A previous study estimated that only 2-4% of heavy smokers received LDCT for lung cancer screening in 2010 in the United States. We sought to determine whether lung cancer screening among high risk smokers increased in 2015, following the USPSTF recommendation in 2013. (more…)
Author Interviews, Cancer Research, CT Scanning, JAMA, Lung Cancer / 30.01.2017

MedicalResearch.com Interview with: Linda Kinsinger, MD, MPH National Center for Health Promotion and Disease Prevention U.S. Department of Veterans Affairs NW Washington DC 20420 MedicalResearch.com: What is the background for this study?  Response: The U.S. Preventive Services Task Force recommends annual lung cancer screening with low-dose computed tomography (LDCT) for current and former heavy smokers ages 55 to 80. However, clinicians have questioned the practical aspects of implementing lung cancer screening. VA provides care for 6.7 million Veterans each year, mostly older men – many of whom are current or former smokers – thus the implementation of a lung cancer screening program for VA patients would require substantial resources. In order to understand the feasibility and implications of this for patients and clinical staff, VA implemented a three-year Lung Cancer Screening Demonstration Project (LCSDP) in eight geographically-diverse VA hospitals. Investigators identified 93,033 primary care patients at eight sites who were assessed on screening criteria, of whom 2,106 patients were screened between July 2013 and June 2015. (more…)
Author Interviews, Brain Injury, Cost of Health Care, CT Scanning, Electronic Records, Emergency Care, Kaiser Permanente / 25.01.2017

MedicalResearch.com Interview with: Adam L. Sharp MD MS Research Scientist/Emergency Physician Kaiser Permanente Southern California Kaiser Permanente Research Department of Research & Evaluation Pasadena, CA 91101 MedicalResearch.com: What is the background for this study? Response: Millions of head computed tomography (CT) scans are ordered annually in U.S. emergency Departments (EDs), but the extent of avoidable imaging is poorly defined. Ensuring appropriate use is important to ensure patient outcomes and limited resources are optimized. A large number of stake holders have highlighted the need to reduce “unnecessary” CT scanning as part of their recommendations for the Choosing Wisely campaign. However, despite calls for improved stewardship, the extent of avoidable CT use among adults with minor trauma in community EDs is not known. The Canadian CT Head Rule (CCHR) is perhaps the most studied of many validated decision instruments designed to assist providers in evaluating patients with minor head trauma. This study aims to describe the scope of overuse of CT imaging by ED providers in cases where application of the CCHR could have avoided imaging. Secondarily, we sought to describe the extent to which avoidable CTs, if averted, would have resulted in “missed” intracranial hemorrhages requiring a neurosurgical intervention. (more…)
Author Interviews, Brigham & Women's - Harvard, Heart Disease, Lancet, Medical Imaging, MRI, Social Issues / 12.01.2017

MedicalResearch.com Interview with: Dr Ahmed Tawakol MD Co-Director, Cardiac MR PET CT Program Massachusetts General Hospital and Harvard Medical School  MedicalResearch.com: What is the background for this study? What are the main findings? Response: While the link between stress and heart disease has long been established, the mechanism mediating that risk hasn’t been clearly understood. Animal studies showed that stress activates bone marrow to produce white blood cells, leading to arterial inflammation.  This study suggests an analogous path exists in humans. Moreover, this study identifies, for the first time in animal models or humans, the region of the brain (the amygdala) that links stress to the risk of heart attack and stroke. The paper reports on two complementary studies. The first analyzed imaging and medical records data from almost 300 individuals who had PET/CT brain imaging, primarily for cancer screening, using a radiopharmaceutical called FDG that both measures the activity of areas within the brain and reflects inflammation within arteries.  All participants in that study had no active cancer or cardiovascular disease at the time of imaging and each had information in their medical records on at least three additional clinical visits after imaging. The second study enrolled 13 individuals with a history of post-traumatic stress disorder, who were evaluated for their current levels of perceived stress and received FDG-PET scanning to measure both amygdala activity and arterial inflammation. (more…)
Author Interviews, Breast Cancer, Cancer Research, Colon Cancer, Cost of Health Care, Mammograms, Medical Imaging, Race/Ethnic Diversity, Radiology / 09.01.2017

MedicalResearch.com Interview with: Dr. Gregory Cooper, MD Program Director, Gastroenterology UH Cleveland Medical Center Co-Program Leader for Cancer Prevention and Control, UH Cleveland Medical Center Professor, Medicine, CWRU School of Medicine Co-Program Leader for Cancer Prevention and Control UH Seidman Cancer Center MedicalResearch.com: What is the background for this study? What are the main findings? Response: The Affordable Care Act, among other features, removed out of pocket expenses for approved preventive services, and this may have served as a barrier to cancer screening in socioeconomically disadvantaged individuals. If so, then the gap in screening between socioeconomic groups should narrow following the ACA. The main findings of the study were that although in the pre-ACA era, there were disparities in screening, they narrowed only for mammography and not colonoscopy. (more…)
Author Interviews, MRI, OBGYNE, Pediatrics / 17.12.2016

MedicalResearch.com Interview with: Prof Paul D Griffiths, FRCR and Cara Mooney, Study Manager: MERIDIAN Clinical Trials Research Unit The University of Sheffield  MedicalResearch.com: What is the background for this study? What are the main findings? Response: Around three in every 1000 pregnancies is complicated by a fetal abnormality. In the UK Ultrasonography (USS) has, for many years, been the mainstay of antenatal screening and detailed anomaly scanning to detect such abnormalities.  However previous studies have suggested that in utero Magnetic Resonance (iuMR) imaging may be a useful adjunct to USS for detecting these brain abnormalities in the developing fetus. This study was designed to test the diagnostic accuracy and clinical impact of introducing fetal MR in to the diagnostic pathway. Our results show that iuMR has an overall diagnostic accuracy of 93% compared to ultrasound at 68%, this is an increase in diagnostic accuracy of 25%. When divided into gestational age group the improvement in diagnostic accuracy ranged from 23% in the 18-23 week group, and 29% in the 24 week and over group. IuMR provided additional diagnostic information in 49% of cases, changed prognostic information in at least 20% and the contribution to clinical management was felt to be at least ‘significant’ in 35% of cases. IuMR also had high patient acceptability with at least 95% of women stating that they would have an iuMR if a future pregnancy were complicated by a fetal brain abnormality. (more…)
Author Interviews, Breast Cancer, Chemotherapy, Mammograms, MD Anderson, Surgical Research / 12.12.2016

MedicalResearch.com Interview with: Henry M. Kuerer, MD, PhD, FACS Executive Director, Breast Network Programs MD Anderson Cancer Network PH and Fay Etta Robinson Distinguished Professor in Research Department of Breast Surgical Oncology Director, Breast Surgical Oncology Training Program MedicalResearch.com: What is the background for this study? Response: Worldwide, triple negative and HER2 positive breast cancers, combined, account for about 370,000 women diagnosed annually. With recent advances in neoadjuvant systemic therapy (NST, chemotherapy and targeted therapy given before surgery) for both subsets, the pCR (pathologic complete response- when no residual cancer is found) rates found at the time of surgery in these populations can be as high as 60 percent. This high rate of pCR naturally raises the question of whether surgery is required for all patients, particularly those who will receive adjuvant radiation. We believe surgery may potentially be redundant – at least for these two subtypes of breast cancer – because of such a high chance for no evidence of disease at the time of pathological review. If there’s no cancer left after the patient has received chemotherapy and the patient is going to receive local radiation therapy, is surgery actually needed? The challenge has been that standard breast imaging methods cannot accurately predict residual disease after NST. However, by doing the same image-guided percutaneous needle biopsies after neoadjuvant systemic therapy that we do at time of diagnosis, our preliminary research reveals that we may be able to accurately predict which women will have cancer or not. (more…)
Author Interviews, Brain Injury, MRI, Pediatrics / 09.12.2016

MedicalResearch.com Interview with: Eman S. Mahdi, MD, MBChB Pediatric Radiology Fellow Catherine Limperopoulos, PhD Director, Developing Brain Research Laboratory Co-Director of Research, Division of Neonatology Diagnostic Imaging and Radiology Children’s National Health System Washington, DC MedicalResearch.com: What is the background for this study? What are the main findings? Response: Premature birth is a major public health concern in the United States affecting 1 in 10 infants each year. Prematurity-related brain injury is very common and associated with a high prevalence of brain injury and accompanying lifelong neurodevelopmental morbidities. Early disturbances in systemic and cerebral hemodynamics are thought to mediate prematurity-related brain injury. The extent to which cerebral blood flow (CBF) is disturbed in preterm birth is poorly understood, in large part because of the lack of monitoring techniques that can directly and non-invasively measure cerebral blood flow. We report for the first time early disturbances in global and regional cerebral blood flow in preterm infants following brain injury on conventional magnetic resonance imaging (MRI) over the third trimester of ex-uterine life using arterial spin labelling images. In terms of regional differences, we saw a marked decrease in blood flow to the thalamus and the pons, regions known to be metabolically active during this time. (more…)
Alcohol, Author Interviews, CT Scanning, Heart Disease / 02.12.2016

MedicalResearch.com Interview with: Pál Maurovich-Horvat MD, PhD, MPH, FSCCT Assistant Professor of Cardiology Director of the MTA-SE Cardiovascular Imaging Research Group Heart and Vascular Center, Semmelweis University Budapest, Hungary MedicalResearch.com: What is the background for this study? What are the main findings? Response: Several studies have been published on alcohol consumption and its association with the presence of coronary artery disease, however the data remains controversial. Some studies suggested that moderate alcohol consumption reduces the risk of heart disease and others found no protective effect. Our study is the first investigation that aims to assess the effect of alcohol on the coronary arteries using coronary CT angiography. We found no association between regular alcohol consumption and the presence of coronary disease. (more…)
Author Interviews, MRI, Psychological Science / 02.12.2016

MedicalResearch.com Interview with: Jeffrey S. Anderson, MD, PhD Director the fMRI Neurosurgical Mapping Service Principal Investigator for the Utah Functional Neuroimaging Laboratory University of Utah MedicalResearch.com: What is your study about? Response: Billions of people find meaning in life and make choices based on religious and spiritual experiences. These experiences range from epiphanies that change the lives of celebrated mystics to subtle feelings of peace and joy in the lives of neighbors, friends, or family members that are interpreted as spiritual, divine, or transcendent. Astonishingly, with all we understand about the brain, we still know very little about how the brain participates in these experiences. We set out to answer what brain networks are involved in representing spiritual feelings in one group of people, devout Mormons. (more…)
Author Interviews, Mammograms, UCSF / 01.12.2016

MedicalResearch.com Interview with: Cindy Lee, MD Assistant Professor Department of Radiology and Biomedical Imaging University of California San Francisco San Francisco, CA MedicalResearch.com: What’s new about the research? How is it different than what’s come before? • The largest study on the topic, including national data from 31 states in the United States. Including 5.7 million screening mammograms with follow up. • All exams using digital techniques, up to date data, more representative of community practices in the U.S. (more…)
Author Interviews, MRI, Technology / 28.11.2016

MedicalResearch.com Interview with: Dr. Heron Werner Junior Clínica de Diagnóstico por Imagem – CDPI Rio de Janeiro - Brazil MedicalResearch.com: What is the background for this study? Response: A growing number of technological advancements in obtaining and viewing images through noninvasive techniques have brought major breakthroughs in fetal medicine. In general, two main technologies are used to obtain images within the uterus during pregnancy i.e. ultrasound (US) and magnetic resonance imaging (MRI). (more…)
Author Interviews, CT Scanning, Heart Disease, JAMA, Women's Heart Health / 16.11.2016

MedicalResearch.com Interview with: Maryam Kavousi MD, PhD, FESC Assistant Professor Department of Epidemiology Erasmus University Medical Center Rotterdam The Netherlands  MedicalResearch.com: What is the background for this study? What are the main findings? Response: The most recent American College of Cardiology/American Heart Association (ACC/AHA) cardiovascular disease (CVD) prevention guidelines recommend statins for a larger proportion of populations. Notably, a large group of women are categorized as low CVD risk by the guidelines and would therefore not typically qualify for intensive management of their standard risk factors. Coronary artery calcium (CAC) scanning allows for the detection of subclinical coronary atherosclerosis and is viewed as the vessel’s memory of lifetime exposure to risk factors. We therefore aimed to address the utility of CAC as a potential tool for refining CVD risk assessment in asymptomatic women at low CVD risk based on the new guidelines. This study involved data on 6,739 low-risk women from 5 population-based cohort studies across the United States and Europe. We found that CAC was present in 36% of low-risk women and was associated with increased risk of CVD. (more…)
Author Interviews, Geriatrics, Medical Imaging, MRI, Weight Research / 08.11.2016

MedicalResearch.com Interview with: Fatemeh Mokhtari Medical Imaging PhD Student VT-WFU SBES MedicalResearch.com: What is the background for this study? What are the main findings? Response: The objective of this study was to use baseline anatomical brain MRI scans to prospectively predict weight loss success following an intensive lifestyle intervention. In the study, 52 participants, age 60 to 79, were recruited from the Cooperative Lifestyle Interventions Programs II (CLIP-II) project. The participants were overweight or obese (BMI greater than 28 and less than 42) and had a history of either cardiovascular disease or metabolic syndrome. All participants had a baseline MRI scan, and then were randomized to one of three groups – diet only, diet plus aerobic exercise training or diet plus resistance exercise training. The goal of the 18-month diet and exercise program was a weight loss of 7 to 10 percent of body mass. Basic brain structure information garnered from the MRIs was classified using a support vector machine, a type of computerized predictive algorithm. Specifically, we trained a computational predictive model which mapped each subject’s brain scan to weight loss performance. Predictions were based on baseline brain gray and white matter volume from the participants’ MRIs and compared to the study participants’ actual weight loss after the 18 months. The accuracy of the model was then tested, and our prediction algorithms were 78% accurate in predicting successful weight loss. Brain gray matter volume provided higher prediction accuracy compared with white matter and the combination of the two outperformed either one alone. (more…)
Author Interviews, Medical Imaging / 06.11.2016

MedicalResearch.com Interview with: Devon A. Klein, MD, MPH Asst. Professor of Radiology and Orthopaedics Hofstra Northwell School of Medicine Associate Chairman, Radiology Lenox Hill Hospital New York, NY 10075 MedicalResearch.com: What is the background for this study? What are the main findings? Response: As our Emergency Department continued to grow our Radiology Department was challenged to accommodate the resultant increased volume with fixed resources (i.e. CT Scanners) and maintain CT scan throughput. Uncoordinated insular efforts within the Department of Radiology failed to resolve the problem. A collaborative approach utilizing Six Sigma lean and involving stakeholders from the Departments of Radiology, Emergency, Medicine, and Patient Transportation was able to better illustrate the “bottlenecks” and devise solutions. (more…)
Author Interviews, Heart Disease, JACC, Medical Imaging / 29.10.2016

MedicalResearch.com Interview with: Kristina H. Haugaa, MD, PhD, FESC Ida Skrinde Leren MD, PhD Department of Cardiology and Center for Cardiological Innovation, Oslo University Hospital, Rikshospitalet Oslo, Norway MedicalResearch.com: What is the background for this study? Response: Arrhythmogenic right ventricular cardiomyopathy (ARVC) is an inheritable cardiomyopathy, predisposing to life-threatening arrhythmias. Ventricular arrhythmias are frequent in ARVC patients and importantly, arrhythmias may occur also before evident structural changes are seen, making risk stratification challenging. Additional tools are needed to detect early disease and to optimize medication and timing of implantation of a cardioverter defibrillator (ICD). We aimed to explore early markers of ARVC disease and their association with previous ventricular arrhythmias. (more…)
Author Interviews, BMJ, CT Scanning, Heart Disease / 27.10.2016

MedicalResearch.com Interview with: Professor Marc Dewey Heisenberg professor of radiology Vice Chairman of the Department of Radiology at Charité (Campus Mitte) Berlin Germany  MedicalResearch.com: What is the background for this study? Response: Over 3.5 million cardiac catheterisations are performed in Europe each year. This study, jointly conducted by radiologists and cardiologists at Charité – Universitätsmedizin Berlin and published in today’s issue of The BMJ, compares computed tomography (CT) with cardiac catheterisation in patients with atypical chest pain and suspected coronary artery disease (CAD). MedicalResearch.com: What are the main findings? Response: CT reduced the need for cardiac catheterisation from 100% to 14% in the group of patients who received CT first instead of catheterisation. If catheterisation was needed in the CT group, the proportion of catheterisations showing obstructive CAD was 5 times higher than in the catheterisation group. Over a period of 3.3 years, the patients in the CT group neither had more cardiac catheterisations nor an increase in cardiovascular events. Moreover, CT shortened the length of stay by 23 hours and 79% of patients said they would prefer CT for future examinations of the heart. Overall, the results of the BMJ study show that CT is a gentle test for reliably ruling out CAD in patients with atypical chest pain who are currently being referred for cardiac catheterisation in routine clinical practice. (more…)
Author Interviews, Cost of Health Care, CT Scanning, Health Care Systems / 23.09.2016

MedicalResearch.com Interview with: Hui Zhang, Ph.D., MBA Virginia Polytechnic Institute and State University Blacksburg MedicalResearch.com: What is the background for this study? What are the main findings? Response: To promote healthcare coordination and contain the rising costs in the US healthcare system, a variety of payment innovations has been developed and field-tested in both public and private sector. Among them, the Medicare Shared Savings Program (MSSP) for Accountable Care Organizations (ACOs), administered by the Centers for Medicare and Medicaid Services (CMS) has received considerable attention. Our study took a mathematical modeling approach and comprehensively captured and analyzed the effect of this new payment systems on healthcare stakeholder decisions and system-wide outcomes. Our results provided decision-making insights for payers on how to improve MSSP, for ACOs on how to distribute MSSP incentives among their members, and for hospitals on whether to invest in new CT imaging systems. (more…)
Author Interviews, Brain Cancer - Brain Tumors, Case Western, MRI, Radiology, Technology / 19.09.2016

MedicalResearch.com Interview with: Dr. Pallavi Tiwari PhD Assistant Professor biomedical engineering Case Western Reserve University MedicalResearch.com: What is the background for this study? What are the main findings? Response: One of the biggest challenges in neuro-oncology currently is distinguishing radionecrosis, a side-effect of aggressive radiation, from tumor recurrence on imaging. Surgical intervention is the only means of definitive diagnosis, but suffers from considerable morbidity and mortality. The treatments for radionecrosis and cancer recurrence are very different. Early identification of the two conditions can help speed prognosis, therapy, and improve patient outcomes. The purpose of this feasibility study was to evaluate the role of machine learning algorithms along with computer extracted texture features, also known as radiomic features, in distinguishing radionecrosis and tumor recurrence on routine MRI scans (T1w, T2w, FLAIR). The radiomic algorithms were trained on 43 studies from our local collaborating institution - University Hospitals Case Medical Center, and tested on 15 studies at a collaborating institution, University of Texas Southwest Medical Center. We further compared the performance of the radiomic techniques with two expert readers. Our results demonstrated that radiomic features can identify subtle differences in quantitative measurements of tumor heterogeneity on routine MRIs, that are not visually appreciable to human readers. Of the 15 test studies, the radiomics algorithm could identify 12 of 15 correctly, while expert 1 could identify 7 of 15, and expert 2, 8 of 15. (more…)
Author Interviews, Duke, Medical Imaging, MRI, PLoS, Psychological Science, Social Issues / 15.09.2016

MedicalResearch.com Interview with: Kevin S. LaBar, Ph.D. Professor and Head, Cognition & Cognitive Neuroscience Program Co-Director of Undergraduate Studies in Neuroscience Center for Cognitive Neuroscience Duke University Durham, NC MedicalResearch.com: What is the background for this study? What are the main findings? Response: Emotion research is limited by a lack of objective markers of emotional states. Most human research relies on self-report, but individuals may not have good insight into their own emotions. We have developed a new way to identify emotional states using brain imaging and machine learning tools. First, we induced emotional states using film and music clips while individuals were in an MRI scanner. We trained a computer algorithm to identify the brain areas that distinguished 7 emotions from each other (fear, anger, surprise, sadness, amusement, contentment, and a neutral state). This procedure created a brain map for each of the 7 emotions. Then, a new group of participants self-reported their emotional state every 30 seconds in an MRI scanner while no stimuli were presented. We could predict which emotion was spontaneously reported by the subjects by comparing their brain scans to each of the 7 emotion maps. Finally, in a large group of 499 subjects, we found that the presence of the fear map during rest predicted state and trait anxiety while the presence of the sadness map predicted state and trait depression. (more…)
Author Interviews, MRI, Orthopedics, Radiology / 15.09.2016

MedicalResearch.com Interview with: Muyibat Adelani, MD Assistant Professor of Orthopaedic Surgery Washington University St. Louis MedicalResearch.com: What is the background for this study? What are the main findings? Response: In our practice, we noticed that more patients are coming in already having had MRIs. We wanted to know how many people actually had weight-bearing knee x-rays before the MRI. We found that only a quarter of patients had weight-bearing x-rays before the MRI. We found that half of the MRIs obtained prior to referral to an orthopaedic surgeon did not contribute to the patient's treatment. (more…)
Author Interviews, JAMA, MRI, Radiology / 08.09.2016

MedicalResearch.com Interview with: Dr. Joel G. Ray MD, MS, FRCPC Professor, Department of Medicine, University of Toronto Professor Department of Obstetrics and Gynecology St. Michael’s Hospital MedicalResearch.com: What is the background for this study? What are the main findings? Response: We have little information about the fetal safety to of MRI in the first trimester of pregnancy, or that of MRI with gadolinium contrast performed at any point in pregnancy. (more…)
Author Interviews, Cancer Research, Mammograms, PNAS, Radiology / 31.08.2016

MedicalResearch.com Interview with: Karla K. Evans, Ph.D. Lecturer, Department of Psychology The University of York Heslington, York UK MedicalResearch.com: What is the background for this study? Response: This research started after initially talking to radiologists and pathologists about how they search a radiograph or micrograph for abnormalities. They talked about being able to tell at the first glance if the image had something bad about it. Jokingly, they talked about “having the force” to see the bad. We wanted to know whether this hunch after the brief initial viewing was real and to systematically test it. We collected radiographic and micrographic images, half of them that had signs of cancer in them and half of them that didn't, and we briefly presented them (250 millisecond to 2000 milliseconds) to radiologists or pathologistsrespectively. They simply had to report whether they would recall the patient or not and try localize on the outline the location of the abnormality. We first reported these finding in the following paper. Evans et al. (2013) The Gist of the Abnormal: Above chance medical decision making in the blink of an eye. Psychonomic Bulletin & Review (DOI) 10.3758/s13423-013-0459-3 In addition to finding that radiologists and pathologists can indeed detect subtle cancers in a quarter of a second we also found that they did not know where it was in the image leading us to conclude that the signal that they were picking up must be a global signal (i.e. the global image statistic or the texture of the breast as a whole) rather than the result of a local saliency. This led me to start further exploring this signal in order to characterize it when I moved to University or York, UK to establish my own lab. (more…)
Author Interviews, Columbia, Heart Disease, JAMA, Medical Imaging / 25.08.2016

MedicalResearch.com Interview with: Adam Castano, M.D., M.S. Division of Cardiology Columbia University Medical Center New York Presbyterian Hospital MedicalResearch.com: What is the background for this study? Response: Transthyretin cardiac amyloidosis (ATTR-CA) is an increasingly recognized cause of heart failure with preserved ejection fraction (HFpEF). Traditionally, the gold standard for diagnosis has required an endomyocardial biopsy coupled with either immunohistochemistry or mass spectroscopy. These specialized tests are only performed at centers with experienced satff, do not yield prognostically useful information, may be inadvisable for frail older adults, and often present logistical challenges that lead to delayed care. Fortunately, single center studies have demonstrated excellent diagnostic accuracy using technetium 99m pyrophosphate (Tc99mPYP) cardiac imaging for noninvasively detecting ATTR-CA and differentiating it from another major type of cardiac amyloidosis called light chain (AL). But the diagnostic accuracy of this technique in a multicenter study and the association of Tc99mPYP myocardial uptake with survival were not known prior to this study. Therefore, we assessed in a multicenter study Tc99mPYP cardiac imaging as a diagnostic tool and its association with survival. We conducted a retrospective cohort study of 229 patients evaluated at 3 academic specialty centers for cardiac amyloidosis and also underwent Tc99mPYP cardiac imaging. We measured retention of Tc99mPYP in the heart using a semiquantitative visual score (range 0-3) and a more quantitative heart-to-contralateral (H/CL) ratio calculated as total counts in a region of interest over the heart divided by background counts in an identical size region of interest over the contralateral chest. The outcome measured was time to death after Tc99mPYP imaging. (more…)
Author Interviews, Dermatology, Diabetes, Heart Disease, JAMA, Medical Imaging, NIH / 24.08.2016

MedicalResearch.com Interview with: Nehal N. Mehta, .MD., M.S.C.E. F.A.H.A. Lasker Clinical Research Scholar Section of Inflammation and Cardiometabolic Diseases NIH MedicalResearch.com: What is the background for this study? What are the main findings? Response: Psoriasis is associated with accelerated cardiovascular (CV) disease; however, screening for CV risk factors in psoriasis remains low. Coronary artery calcium (CAC) score estimates the total burden of atherosclerosis. Psoriasis has been associated with increase CAC score, but how this compares to patients with diabetes, who are aggressively screened for CV risk factors, is unknown. (more…)
Author Interviews, CT Scanning, Lung Cancer, PLoS, Radiology / 19.08.2016

MedicalResearch.com Interview with: Matthew B. Schabath PhD Department of Cancer Epidemiology H. Lee Moffitt Cancer Center and Research Institute Tampa, Florida MedicalResearch.com: What is the background for this study? What are the main findings? Response: Our study is a post-hoc analysis of data from a large randomized clinical trial (RCT) called the National Lung Screening Trial (NLST). The NLST found that lung cancer screening with low-dose helical computed tomography (LDCT) significantly reduced lung cancer deaths by 20 percent compared to screening with standard chest radiography (i.e., X-Ray). In our publication, we performed a very detailed analysis comparing outcomes of lung cancer patients screened by LDCT according to their initial (i.e., baseline), 12 month, and 24 month screening results. We found that patients who had a negative baseline screening but tested positive for lung cancer at the 12- or 24-month screen had lower survival and higher mortality rates than patients who had a positive initial screen that was a non-cancerous abnormality but developed lung cancer in subsequent screens. (more…)