Targeted rapid knee MRI exam using T 2 shuffling

作者：Jonathan I. Tamir, Valentina Taviani, Marcus T. Alley, Becki C. Perkins, Lori S. Hart, Kendall O’Brien, Fidaa Wishah, Jesse K. Sandberg, Michael J. Anderson, Javier S. Turek, Theodore L. Willke, Michael Lustig, Shreyas Vasanawala · 发表于：Journal of Magnetic Resonance Imaging · 年份：2019 · DOI：10.1002/jmri.26600 · 被引用次数：16 · 研究领域：Lower Extremity Biomechanics and Pathologies、Orthopedic Infections and Treatments、Sports injuries and prevention

BACKGROUND: MRI is commonly used to evaluate pediatric musculoskeletal pathologies, but same-day/near-term scheduling and short exams remain challenges. PURPOSE: To investigate the feasibility of a targeted rapid pediatric knee MRI exam, with the goal of reducing cost and enabling same-day MRI access. STUDY TYPE: A cost effectiveness study done prospectively. SUBJECTS: Forty-seven pediatric patients. FIELD STRENGTH/SEQUENCE: 2D fast spin-echo (FSE) sequence. A distributed, compressed sensing-based reconstruction was implemented on a four-node high-performance compute cluster and integrated into the clinical workflow. ASSESSMENT: In an Institutional Review Board-approved study with informed consent/assent, we implemented a targeted pediatric knee MRI exam for assessing pediatric knee pain. Pediatric patients were subselected for the exam based on insurance plan and clinical indication. Over a 2-year period, 47 subjects were recruited for the study and 49 MRIs were ordered. Date and time information was recorded for MRI referral, registration, and completion. Image quality was assessed from 0 (nondiagnostic) to 5 (outstanding) by two readers, and consensus was subsequently reached. STATISTICAL TESTS: A Wilcoxon rank-sum test assessed the null hypothesis that the targeted exam times compared with conventional knee exam times were unchanged. RESULTS: Shuffling was reduced from 18.9 minutes to 95 seconds using the distributed implementation. Technical fees charged for the targeted...