MedicalResearch.com:  Katrina N. Glazebrook, MB, ChB Department of Radiology, Mayo Clinic, 200 First St SW, Rochester, MN 55905 MedicalResearch.com:  Why did you do the study? Dr. Glazebrook: We felt CT was being underutilized for evaluation of knee injuries. The utility of CT has been well documented in the assessment of fractures, but little attention has been made on soft tissue evaluation. CT now has high spatial resolution with very thin reconstructions in any desirable plane, and we have previously noted that this allowed injured soft tissue structures such as cruciate ligaments to be well visualized [presented at Society of Skeletal Radiology meeting March 2013]. We had determined in that prior study that the best reconstruction plane to evaluate both normal and torn anterior cruciate ligaments was the oblique sagittal plane parallel to the lateral femoral condyle as routinely used in MRI imaging of the knee The soft tissue window, single energy bone removal and Dual energy bone removal were the best reconstructions to determine the presence or absence of ACL disruption The bone removal techniques removed the distracting bone so the soft tissue structures were more apparent. (more…)