Radiology Commons^™

Impact Of Dual-Energy Computed Tomography (Dect) Postprocessing Protocols On Detection Of Monosodium Urate (Msu) Deposits In Foot Tendons Of Cadavers, Andrea Sabine Klauser, Sylvia Strobl, Christoph Schwabl, Christian Kremser, Werner Klotz, Violeta Vasilevska Nikodinovska, Hannes Stofferin, Yannick Scharll, Ethan Halpern

Department of Radiology Faculty Papers

Objective: To evaluate two different dual-energy computed tomography (DECT) post-processing protocols for the detection of MSU deposits in foot tendons of cadavers with verification by polarizing light microscopy as the gold standard. Material and Methods: A total of 40 embalmed cadavers (15 male; 25 female; median age, 82 years; mean, 80 years; range, 52–99; SD ± 10.9) underwent DECT to assess MSU deposits in foot tendons. Two postprocessing DECT protocols with different Hounsfield unit (HU) thresholds, 150/500 (=established) versus 120/500 (=modified). HU were applied to dual source acquisition with 80 kV for tube A and 140 kV for tube B. …

Diagnostic Accuracy Of Ultrasonography For Rotator Cuff Tears: A Systematic Review And Meta-Analysis, Ali S Farooqi, Alexander Lee, David Novikov, Ann Marie Kelly, Xinning Li, John D Kelly, Robert L Parisien

Department of Medicine Faculty Papers

Background: With recent improvements in transducer strength, image resolution, and operator training, ultrasound (US) provides an excellent alternative imaging modality for the diagnosis of rotator cuff tears.

Purpose: To evaluate the diagnostic accuracy of US for partial- and full-thickness rotator cuff tears and biceps tendon tears, compare diagnostic values with those of magnetic resonance imaging (MRI) using arthroscopy as the reference standard, assess longitudinal improvements in accuracy, and compare diagnostic values from operators with different training backgrounds.

Study Design: Systematic review; Level of evidence, 3.

Methods: The PubMed and Cochrane Library databases were systematically searched for full-text journal articles published …

Primary Leiomyosarcoma Of The Distal Tibia: A Case Report., Sachin Dheer, Pamela Gekas, Faith Schick, Homyar Karanjia, Nicholas Taweel

Department of Radiology Faculty Papers

The authors present an unusual case of a leiomyosarcoma of the distal tibia. Leiomyosarcoma tumors typically originate from smooth muscle tissue. It is rare for it to derive from bone and even rarer to be found in a bone of the lower limb. Given this extreme rarity in addition to nonspecific findings on plain film radiographs and magnetic resonance imaging (MRI), biopsy was needed in this case. It was only through immunochemistry staining that a definitive diagnosis was made. As such, this case is an illustrative example of an aggressive, though rare, primary lesion of the bone which should be …

Radiologic Measurements In The Assessment Of Patellar Instability: A Systematic Review And Meta-Analysis., Alex E White, Peters T Otlans, Dylan P. Horan, Daniel Calem, William Emper, Kevin Freedman, Fotios Tjoumakaris, Md

Rothman Institute Faculty Papers

Background: Numerous diagnostic imaging measurements related to patellar instability have been evaluated in the literature; however, little has been done to compare these findings across multiple studies.

Purpose: To review the different imaging measurements used to evaluate patellar instability and to assess the prevalence of each measure and its utility in predicting instability. We focused on reliability across imaging modalities and between patients with and without patellar instability.

Study Design: Systematic review; Level of evidence, 4.

Methods: We performed a systematic review of the literature using the PubMed, SCOPUS, and Cochrane databases. Each database was searched for variations of the …

Ultrasound-Triggered Antibiotic Release From Peek Clips To Prevent Spinal Fusion Infection: Initial Evaluations., Lauren J. Delaney, Daniel Macdonald, Jay Leung, Keith Fitzgerald, Alex M. Sevit, John R. Eisenbrey, Neil Patel, Flemming Forsberg, Christopher K. Kepler, Taolin Fang, Steven M. Kurtz, Noreen J. Hickok

Department of Orthopaedic Surgery Faculty Papers

Despite aggressive peri-operative antibiotic treatments, up to 10% of patients undergoing instrumented spinal surgery develop an infection. Like most implant-associated infections, spinal infections persist through colonization and biofilm formation on spinal instrumentation, which can include metal screws and rods for fixation and an intervertebral cage commonly comprised of polyether ether ketone (PEEK). We have designed a PEEK antibiotic reservoir that would clip to the metal fixation rod and that would achieve slow antibiotic release over several days, followed by a bolus release of antibiotics triggered by ultrasound (US) rupture of a reservoir membrane. We have found using human physiological fluid …

Anatomical Relationships Of The Anterior Blood Vessels To The Lower Lumbar Intervertebral Discs: Analysis Based On Magnetic Resonance Imaging Of Patients In The Prone Position., Alexander R Vaccaro, Christopher K Kepler, Jeffrey A Rihn, Hidekazu Suzuki, John K Ratliff, James S Harrop, William B Morrison, Worawat Limthongkul, Todd J Albert

Rothman Institute Faculty Papers

BACKGROUND: Intra-abdominal vascular injuries are rare during posterior lumbar spinal surgery, but they can result in major morbidity or mortality when they do occur. We are aware of no prior studies that have used prone patient positioning during magnetic resonance imaging for the purpose of characterizing the retroperitoneal iliac vasculature with respect to the intervertebral disc. The purpose of this study was to define the vascular anatomy adjacent to the lower lumbar spine with use of supine and prone magnetic resonance imaging.

METHODS: A prospective observational study included thirty patients without spinal abnormality who underwent supine and prone magnetic resonance …