Clinical Feasibility of High-Resolution Contrast-Enhanced Dynamic T1-Weighted MR Imaging of the Upper Abdomen Using Compressed Sensing

Congress:

ECR 2020

Poster Number:

C-01363

Type:

Scientific Exhibit

Keywords:

Performed at one institution, Case-control study, Retrospective, Image verification, Image compression, Contrast agent-intravenous, MR, Pancreas, MR physics, Liver, Abdominal Viscera

Authors:

Y. Kim, J. Hwang; Seoul/KR

DOI:

10.26044/ecr2020/C-01363

DOI-Link:

https://dx.doi.org/10.26044/ecr2020/C-01363

Table 1: Table 1. Demographics of Study Population

Table 2: Table 2. Acquisition Parameters of MRI examination

Table 3: Table 3. Comparison of Qualitative Analysis Scores between VIBE and CS-VIBE

Table 4: Table 4. Quantitative measurements in VIBE and CS-VIBE

Fig. 1: Figure 1. Contrast-enhanced dynamic T1-weighted imaging using compressed...

Fig. 2: Figure 2. Contrast-enhanced dynamic T1-weighted imaging using compressed...

Purpose

MRI is an important imaging modality for noninvasive examination with a lack of radiation hazard [1]. Especially MRI is useful in the evaluation of biliary-pancreatic disease because it provides excellent visualization of anatomic structure including pancreatic and biliary ductal anatomy with high soft tissue contrast [2]. However, MRI has inherent weakness including long acquisition time, resulting in respiratory motion artifacts and also limited spatiotemporal resolution compared to CT. Thus, multi-detector CT has been preferred for evaluation of biliary-pancreatic disease because of its high spatial resolution...

Methods and materials

Study population: This study retrospectively included 35-patients who underwent dynamic T1WI using volumetric interpolated breath-hold examination with compressed sensing reconstruction (CS-VIBE) in a breath-hold manner. 35-patients with dynamic T1WI with conventional VIBE were used for comparison.Detailed demographics of the study population are given in Table 1. MR examinations: All MRI was acquired on a 3T scanner (MAGNETOM Skyra, Siemens Healthcare, Erlangen, Germany) equipped with a 60-channel body-array coil. The baseline biliary-pancreatic MR sequences included pre-contrast moderate and heavily T2WI, dual-echo T1WI, diffusion-weighted imaging, navigator-triggered 3D...

Results

Qualitative analysis: CS-VIBE achieved significantly better anatomic sharpness in all phases and hepatic artery clarity compared to VIBE (p < 0.05). VIBE showed less cardiac motion artifacts compared to CS-VIBE (p < 0.05). There was no significant difference in motion artifacts in contrast-enhanced phases and overall image quality between the two sequences.The inter-observer agreement was good to excellent for VIBE (ICC = 0.522-0.864) and CS-VIBE (ICC = 0.576-0.861). Quantitative analysis: The SIs of the liver and pancreas were not significantly different in precontrast image, but...

Conclusion

In this study, we evaluated the clinical feasibility of high-resolution contrast-enhanced dynamic T1WI using CS-VIBE in a breath-hold manner. CS has the potential to significantly reduce acquisition time by reconstruction of data from highly under-sampled k-space data. In our study, CS was applied to increase the spatial resolution in order to acquire images of nearly isotropic resolution in the dynamic phase while maintaining high temporal resolution. The results demonstrated that CS-VIBE achieved significantly better anatomic delineation of liver and pancreas edge sharpness and hepatic artery...

Personal information and conflict of interest

Yeonsoo Kim, M.D. Department of Radiology, Soonchunhyang University College of Medicine, Seoul Hospital, Seoul, Republic of Korea Jiyoung Hwang, M.D., Ph.D. Department of Radiology, Soonchunhyang University College of Medicine, Seoul Hospital, Seoul, Republic of Korea 59 Daesagwan-ro, Yongsan-gu, Seoul, 04401, Republic of Korea Tel: 82-2-709- 9396 Fax: 82-2-709- 3928 E-mail: [email protected]

References

1. Neto JAG, Elazzazzi M, Altun E, Semelka RC (2008) When should abdominal magnetic resonance imaging be used? Clinical Gastroenterology and Hepatology 6:610-615. 2. O’Neill E (2014) MR Imaging of the Pancreas. Radiologic Clinics of North America 52:757-777. 3. Visser BC, Yeh BM, Qayyum A, Way LW, McCulloch CE, Coakley FV (2007) Characterization of cystic pancreatic masses: relative accuracy of CT and MRI. American Journal of Roentgenology 189:648-656. 4. Lee JK, Kim AY, Kim PN, Lee M-G, Ha HK (2010) Prediction of vascular involvement and...