Yasuo Takatsu^1,2, Masafumi Nakamura³, Satoshi Kobayashi⁴, and Tosiaki Miyati^4
1Department of Radiological Technology, Faculty of Health and Welfare, Tokushima Bunri University, Sanuki-city, Japan, ²Department of System Control Engineering, Graduate School of Engineering, Tokushima Bunri University, Sanuki-city, Japan, ³Department of Radiology, Otsu City Hospital, Otsu, Japan, ⁴Division of Health Sciences, Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Japan

The hepatobiliary phase image using Gd–EOB–DTPA in the liver MRI is assessed by the quantitative liver–spleen contrast ratio (Q-LSC) , the cutoff value at which tumors can be easily determined is 1.5. However, Q-LSC is found unsuitable for cases of splenectomy and when there is splenic deposition of Gamna–Gandy bodies. Therefore, the quantitative liver-portal vein contrast ratio (Q-LPC) is useful instead of Q-LSC. The cutoff value of Q-LPC was at 1.462, the sensitivity and the specificity were higher than Q-LSC at the cutoff value. Q-LPC cutoff value can be used for hepatobiliary phase MR image evaluation.

Misaki Saito¹, Shuhei Shibukawa¹, Natsuo Konta¹, Takuya Hara², Takakiyo Nomura², Makoto Obara³, Isao Muro¹, and Tetsu Niwa^2
1radiological technology, Tokai university hospital, Isehara, Japan, ²Tokai University School of Medicine, Isehara, Japan, ³Philips Japan, Tokyo, Japan

This study was conducted to optimize the enhanced Acceleration-Selective Arterial Spin Labeling (eAccASL) for non-gated hand MRA. The MRA images obtained using four acceleration encoding (AENC) were assessed by visual evaluation for arterial depiction and venous contamination. The blood flow velocity obtained by phase-contrast cine was compared with the visual evaluation. It was found that the smaller the AENC (i.e. stronger motion sensitize gradients), the higher venous contamination and higher arterial visualization. The tendency of high visual evaluation was found in subjects with fast blood flow. The AENC of 0.5 or 1.0 was optimized for non-gated MRA of the hand.

Huijun Liao¹, Eduardo Jorge Uribe Coello¹, Wufan Zhao¹, Han Sam Jiang¹, and Alexander Lin^1
1Center for Clinical Spectroscopy, Brigham and Women's Hospital, Boston, MA, United States

B0 homogeneity is important for clinical spectroscopy but is highly region dependent and time consuming.  Enlarging shim volume could be a quick and easy way to improve B0 homogeneity in the clinical practice of spectroscopy and the goal of this study is test if this method is beneficial.  We used different methods to measure the potential improvement in B0 homogeneity in different brain regions.  While our results showed that increasing shim volumes did not improve spectral linewidths or data quality, we demonstrate a robust method of measuring B0 homogeneity in clinical spectroscopy.

Chao Wei¹ and Jiangning Dong^1
1Anhui provincial tumor hosptial, Hefei, China

The establishment  and  verification  of  conditional  inference  tree model based on based on the MRI-T2WI radiomics has high clinical value in the identification of three common pathological subtypes of uterine leiomyoma. 

Helen Harvey^1
1MRI, Cambridge University Hospitals, Cambridge, United Kingdom

Advances in technology in MRI have allowed for the improved spatial resolution of small joints like the sternoclavicular joint (SCJ). We have shown that through the use of arthrography and MRI we can provide better visualisation of SCJ anatomy, disc tears and other pathologies. Helping to increase knowledge and greatly improve treatment and surgical planning options for the patient.

This presentation aims to understand the techniques for MRI arthrography of the SCJ, review anatomy demonstrated on SCJ arthrography and demonstrate common pathologies of the SCJ.

Daisuke Morimoto-Ishikawa^1,2, Tomoko Hyodo³, Shigeyoshi Saito², Yu Ueda⁴, Masato Ohmi², and Kazunari Ishii^3
1Radiology Center, Kindai University Hospital, Osaka-Sayama, Japan, ²Department of Medical Physics and Engineering, Osaka University Graduate School of Medicine, Suita, Japan, ³Department of Radiology, Kindai University, Osaka-Sayama, Japan, ⁴Philips Japan, Tokyo, Japan

We investigated the single breath-hold three-dimensional (3D) Look-Locker (LL) sequence in nine different concentrations phantoms, which can be used to evaluate Crohn's disease (CD). Percentage errors between T₁ relaxation time obtained by varying inversion recovery pulse interval and recovery period in the LL sequence and T₁ relaxation time obtained by the Inversion Recovery sequence were calculated. With the combination of inversion recovery pulse interval of 7000ms and recovery period of 4000ms, the LL sequence can calculate T₁ relaxation time within 10% percentage errors in the fastest imaging time of 21 seconds.

Ke Zhang¹ and Guobin Hong^2
1Radiology, The Fifth Affiliated Hospital,Sun Yat-sen University, Zhuhai, China, ²Radiology, the Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, China

The current diagnosis of the sacroiliac joint lesions with axSpA is most concentrated on qualitative or semi-quantitative methods.There is an urgent need for a quantitative method that can objectively and accurately evaluate the severity of the disease.Synthetic MRI (MAGiC) can generate multiple contrast images and quantitative maps simultaneously based on the same scan.To our knowledge,this study is the first to investigate the potential practicality of synthetic MRI for assessing sacroiliac joint lesions of participants with axSpA.In this study we hypothesized that synthetic MRI could be used for the qualitative and quantitative diagnosis of sacroiliac joints lesions of participants with axSpA. 

Brian Johnson¹, Jonathan Chia¹, Dave Hitt¹, Rob Lay¹, Tom Lowe¹, Michael Pawlak¹, John Penatzer¹, James Snicer¹, Marcie Stopchinski¹, Gregory Thomas¹, Kristen Williams¹, and Paul Worthington^1
1Philips Healthcare, Gainesville, FL, United States

Consistent high-quality magnetic resonance imaging (MRI) of the cervical spine still remains challenging because of the inherent small anatomical structures and degradation of image quality due to motion artifacts1.  Motion artifacts can arise from several sources including swallowing, respiration, cerebrospinal fluid (CSF) pulsation, blood flow, and bulk patient movement.  MRI of the cervical spine is one the highest performed exams globally.  Here we present a complete cervical spine MRI protocol utilizing 2D and 3D radial k-space sampling techniques which are inherently motion insensitive to increase image quality.  

Gail H Kohls¹, Robert Shih², J Kevin Demarco², and Maureen Hood^2
1Radiology, USU/WRNMMC, MIDDLETOWN, MD, United States, ²Radiology, WRNMMC, Bethesda, MD, United States

The concepts behind diffusion imaging are complicated. As Technologist/Radiographers we use these finished pulse sequences in our daily work, but we do not always have the background information of how each sequence is developed and why it is an important part of the imaging we perform. This abstract is an attempt give the Technologist/Radiographer a better understanding of the key concepts of diffusion and how the diffusion sequences such as Diffusion Weighted Imaging (DWI) and Diffusion Tensor Imaging (DTI) measure water movement.

Petronella Samuels¹, Paul Scholtz², Judith Whittaker³, and Sally Candy^4
1Cape Universities Body Imaging Centre, University of Cape Town, Cape Town, South Africa, ²Department of Radiology, Morton & Partners Radiology, Cape Town, South Africa, ³Anatomical Pathology, Lancet Laboratories, Cape Town, South Africa, ⁴Division of Diagnostic Radiology, Groote Schuur Hospital and University of Cape Town, Cape Town, South Africa

 

We present the MRI and histological findings in a case of Female Adnexal Tumour of Wolffian Origin (FATWO) / WAT (Wolffian Adnexal Tumour), a rare adnexal neoplasm. This mass, located in the right broad ligament demonstrated diffusely low signal intensity on both T2WI and T1WI, peripheral restriction on DWI, peripheral enhancement and central hypo-enhancement post Gadolinium. An awareness of this condition and its MRI findings will ensure that appropriate immunohistochemical staining is performed. The presence of restriction may be helpful in predicting tumour behaviour, surgical approach and postoperative management.