Slightly flexed knee position within a standard knee coil: MR delineation of the anterior cruciate ligament

European Radiology
M NiitsuY Itai

Abstract

The purpose of this study was to assess the value of positioning the knee slightly flexed within a standard MR knee coil in delineation of the anterior cruciate ligament (ACL). Within the confined space of a commercially available knee coil, knee could bend as much as 30 degrees , average 17 degrees of flexion. Sets of oblique sagittal MR images were obtained at both fully extended and slightly flexed positions. Twenty-two normal knees and 18 knees with ACL tears were examined and paired MR images were evaluated by two observers. Compared with knee extension, the MR images for knee flexion provided better clarity in 57 % of reviews of full length of the ACL and 53 % of the femoral attachment. In the extended position the anterior margin of the ligament was obscured due to partial averaging with the intercondylar roof. We recommend examining the knee in an achievable flexed position within the standard knee coil.

Citations

Oct 3, 2003·Clinical Radiology·M Niitsu, K Ikeda
Jul 24, 2002·Clinical Biomechanics·Per WretenbergGunnar Németh
Apr 29, 1998·Journal of Women's Health
Apr 7, 2007·Topics in Magnetic Resonance Imaging : TMRI·Kathryn J Stevens, Jason L Dragoo
Mar 2, 2013·Radiology and Oncology·Dragoslav Nenezic, Igor Kocijancic
Jul 5, 2007·The Knee·Darren KlassPhilip Hopgood
Aug 16, 2016·Surgical and Radiologic Anatomy : SRA·Daphne GuenounPierre Champsaur
Jan 24, 2014·Veterinary Radiology & Ultrasound : the Official Journal of the American College of Veterinary Radiology and the International Veterinary Radiology Association·Juan PodaderaMariano Makara
Sep 23, 2003·Journal of Computer Assisted Tomography·Sung Hwan HongHeung Sik Kang

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