Compressed sensing MR fast imaging: The clarification of image quality problems for practical use and development of evaluation methods

2014 Fiscal Year Final Research Report

• Project/Area Number: 24591747
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Radiation science
• Research Institution: Tohoku University
• Principal Investigator: MACHIDA Yoshio 東北大学, 医学(系)研究科(研究院), 教授 (30507083)
• Co-Investigator(Kenkyū-buntansha): MORI Issei 東北大学, 大学院医学系研究科, 非常勤講師 (90375171) ; TAMURA Hajime 東北大学, 大学院医学系研究科, 非常勤講師 (20333817)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: compressed sensing / MRI / fast imaging / image quality evaluation

Outline of Final Research Achievements

As an acceleration technique for use with MRI, compressed sensing MRI (CS-MRI) was introduced recently to obtain MR images from undersampled data. Image formation procedure based on informatics theory have complicated characteristics. Therefore, the factors affecting image quality in CS-MRI must be elucidated from the point of view of clinical application. In this study, we specifically examined the image quality of MR angiography. For MR angiography, the depictability of thin blood vessels is extremely important, but quantitative evaluation of thin blood vessel depictability is difficult. We proposed a numerical evaluation method using a simple numerical phantom model mimicking the cerebral arteries.

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