View Presentation Video

Helen L Prince^1
1MRI, CUH Addenbrookes UK, Newmarket, United Kingdom

In theory a ZTE or Zero Echo Time could visualise and benefit MRI imaging of any joint. It can be used in a wide spectrum of developmental, traumatic, inflammatory, rheumatologic and oncologic conditions. It may remove the need for CT with detailed depiction of bone anatomy. It opens the doors for more MRI based research into many musculoskeletal conditions and morphometric analysis. One MRI examination with a ZTE sequence allows cross referencing of sequences aiding diagnosis, prognostication and surgical guidance in soft tissue and bone with precise measurements that involve bony landmarks.

View Presentation Video

Tatsunori Saho¹, Johshin Matsuzaki¹, Chihiro Hayashida¹, and Takahiro Kubota^1
1Dept. of Radiological technology, Kokura memorial hospital, Kitakyushu, Japan

For evaluation of arteriovenous malformations, contrast-enhanced 4D-MRA is useful to detect feeding arteries and draining veins. However, with the Keyhole technique, contamination of different phases is a major problem. We solved this problem by applying parallel imaging with compressed sensing to contrast-enhanced 4D-MRA(CS-4D-MRA). CS-4D-MRA was able to acquire images without contamination of the arterial phase with echo signals from the venous phase. It also had high temporal and spatial resolution, and was able to clearly visualize the feeder and the drainer.

View Presentation Video

Gail H Kohls^1,2, Herman Douglas Morris^1,2, Maureen N Hood^1,2, James Kevin DeMarco^1,2, and Thomas KF Foo^1,3
1Radiology & Radiological Sciences, USUHS, Bethesda, MD, United States, ²Radiology, Walter Reed National Military Medical Center, Bethesda, MD, United States, ³GE Research Center, Niskayuna, NY, United States

Diffusion imaging has progressed beyond standard DTI to mutli-shell and non-Gaussian techniques to improve upon the sensitivity of detecting multiple fiber angles in a voxel. Newer high-gradient scanners are able to further expand the capabilities of these advanced DTI sequences to help us improve upon the detection of complex fiber tracks in voxels, which is important in the evaluation and treatment of traumatic brain injury. These new technologies hold promise to improve our understanding of the movement of microcellular fluids.

View Presentation Video

YiJun Mao^1,2, Wanxuan Fang², Yujie An², Hiroyuki Sugimori¹, Shinji Kiuch³, and Tamotsu Kamishima^1
1Faculty of Health Sciences, Hokkaido University, Sapporo, Japan, Sapporo, Japan, ²Graduate School of Health Sciences, Hokkaido University, Sapporo, Japan, Sapporo, Japan, ³AIC Yaesu Clinic, Tokyo, Japan, Tokyo, Japan

Keywords: Rheumatoid Arthritis, DSC & DCE Perfusion   The volume of synovitis change is one of the most important pathological features of rheumatoid arthritis. By quantitative analysis of the enhancement of synovitis, we can define the degree of the disease, and determine the treatment and diagnosis. Considering the time-consuming of manual outlining and visual assessment, this study uses machine learning methods to conduct quantitative analysis of TIC, and proposes an unsupervised learning method with excellent results, which is expected to be an alternative for the gold-standard manual synovitis contour outlining.

View Presentation Video

Kristina M. Pelkola^1,2, Norman Farrar¹, Alyssa Ailion³, Tess Wallace^1,2, Onur Afacan^1,2, Yao Sui^1,2, and Simon K. Warfield^1,2
1Radiology, Boston Children's Hospital, Boston, MA, United States, ²Computational Radiology Laboratory, Boston Children's Hospital, Boston, MA, United States, ³Neurology, Boston Children's Hospital, Boston, MA, United States

Visit any magnetic resonance imaging (MRI) facility, and all will agree that patient motion is an ongoing matter. This holds particularly true for pediatric facilities performing functional MRI (fMRI) exams. During fMRI exams, motion artifacts are subtle and contribute to data corruption which is not discovered until the data is analyzed. To enable the technologist to intervene when motion occurs, a real-time motion monitoring system “Slice Localization Integrated MRI Monitoring” (SLIMM) was established to detect motion and reduce the amount of scan time necessary while simultaneously increasing the quality of data collected.

View Presentation Video

Makoto Suzuki¹, Tatsyuya Hayashi², Kazutaka Nashiki¹, Hidemichi Kawata¹, Shuji Nagata³, and Toshi Abe^3
1Department of Radiological technology, Kurume University Hospital, Kurume, Japan, ²Department of Radiological Technology, Faculty of Medical Technology, Teikyo University, Tokyo, Japan, ³Department of Radiology, Kurume University School of Medicine, Kurume, Japan

We investigated the usefulness of magnetic resonance spectroscopy (MRS) for water T₁ relaxation time independent on the presence of fat in the liver phantom. Then,T₁ relaxation time measurements were performed using inversion recovery-spin echo, modified look locker, variable flip angle, and MRS on a 3T-MRI system. T₁ relaxation time measurement by the MRS water signal is less affected by the presence of fat and more accurate than the other methods. This technique does not use special research sequences and can be realized on clinical MRI scanner where MRS can be performed.