| 18:30 | 5184.
 | Quantitative assessment of the anterior talofibular ligament after arthroscopic repair using T2* values Yoshihiro Akatsuka1, Atsushi Teramoto2, Yasutaka Murahashi2, Katsunori Takahashi2, Rui Imamura1, and Kota Watanabe3
1Division of Radiology and Nuclear Medicine, Sapporo Medical University Hospital, Sapporo, Japan, 2Department of Orthopaedic Surgery, Sapporo Medical University, Sapporo, Japan, 3Second Division of Physical Therapy, Sapporo Medical University, Sapporo, Japan Keywords: Motivation: Although anterior talofibular ligament (ATFL) repair is commonly performed as part of chronic lateral ankle instability (CLAI) surgical treatment, there are no reports that quantitatively evaluate the repaired ATFL. Goal(s): Our goal was to investigate longitudinal changes in T2* values within ATFL after primary ATFL repair. Approach: We compared preoperative and 6 months postoperative T2* values of the ATFL using high-resolution T2* map images. Results: There was a 118% change in the T2* value at 6 months after ATFL repair, including a 130% change on the fibular side. Impact: These findings provide basic data to help understand the healing process after ATFL repair surgery and provide quantitative values may help predict recurrence and clinical outcomes. |
| 18:40 | 5185.
 | 3D Radial mDIXON Acquisition for Improved Breast Imaging Brian Johnson1, Joel Batey1, Dave Hitt1, Robert Lay1, Tom Lowe1, Michael Pawlak1, John Penatzer1, Gregory Thomas1, Kristen Williams1, Mike Williams1, Paul Worthington1, Taylor Zastrow1, and Jonathan Chia1
1Philips, Cleveland, OH, United States Motivation: Breast magnetic resonance imaging (MRI) is a sensitive technique for staging and screening for breast cancer, however, it is susceptible to motion artifacts and inhomogeneous fat saturation. Goal(s): Demonstrate that 3D radial mDIXON acquisition provides robust motion suppression and homogenous fat saturation. Approach: Compared image quality of 3D radial mDIXON to 3D Cartesian mDIXON and 3D Cartesian with spectral fat saturation. Advanced postprocessing was also performed on the 3D radial mDIXON to see if additional diagnostic information could be obtained. Results: 3D radial mDIXON of the breast showed constantly high image quality with less motion artifacts and homogenous fat suppression. Impact: 3D radial mDIXON provides many advantages over Cartesian
spectrally fat saturated acquisitions. The
radial acquisition is less sensitive to motion artifacts. mDIXON provides consistent fat suppression compared
to spectral fat suppression. Advanced postprocessing
of mDIXON images provides further diagnostic utility. |
| 18:50 | 5186.
 | Abbreviated liver MRI (AMRI) as a surveillance method for hepatocellular carcinoma in high risk patients Helena Oliveira1
1MRI, Cambridge University Hospitals, Fulbourn, Cambridge, United Kingdom Motivation: The low sensitivity of liver ultrasound precludes the diagnosis of hepatocellular carcinoma, which led to an increased interest in abbreviated liver mri as an alternative diagnostic tool Goal(s): The goal of this research study was to assess the diagnostic performance of abbreviated liver MRI for the diagnosis of hepatocellular carcinoma Approach: This study is a literature review, in which the latest available literature relevant to the topic was assessed with the intent of answering the research question Results: Liver AMRI shows higher sensitivity than ultrasound for diagnosis of HCC and its diagnostic performance is comparable to that seen in a conventional protocol Impact: In summary, liver AMRI should be considered as an altertative strategy to ultrasound for HCC surveillance. Future research including prospective studies, cost-effectiveness assessments and a consensus on an ideal AMRI protocol should be carried out. |