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Yoshihiro Akatsuka¹, Atsushi Teramoto², Yasutaka Murahashi², Katsunori Takahashi², Rui Imamura¹, and Kota Watanabe^3
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.

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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 Chia^1
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.   

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Helena Oliveira^1
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.