撮像パラメータがSynthetic MRI に及ぼす影響について

• Published in: Nippon Hōshasen Gijutsu Gakkai zasshi Vol. 74; no. 2; pp. 117 - 123
• Main Authors: 堀江, 朋彦, 渋川, 周平, 今田, 奈津夫, 白鳥, 智章, 小原, 真
• Format: Journal Article
• Language: Japanese
• Published: Kyoto 公益社団法人 日本放射線技術学会 01.01.2018; Japan Science and Technology Agency
• Subjects: 3.0 T; Brain; Cerebrospinal fluid; Data acquisition; Image acquisition; Image contrast; Magnetic resonance imaging; Mathematical analysis; Parameters; Parenchyma; Proton density (concentration); synthetic MRI; T1 value; T2 value
• ISSN: 0369-4305; 1881-4883
• DOI: 10.6009/jjrt.2018_JSRT_74.2.117

Synthetic MRI can provide proton density (PD), T1 value, T2 value for each pixel by only one data acquisition and can create various contrast-weighted images. The aim of this study is to evaluate the effect on the calculation of the T1·T2 value when changing the scan parameters for synthetic MRI. In the phantom study, when changing 1st TE/2nd TE/TR/TSE factor, the effect on the T1·T2 value calculated by synthetic MRI was examined. In the volunteer study, the brain was imaged and compared with known T1·T2 value. In phantom study, the effect on the T2 value by the 1st TE/2nd TE/TSE factor was shown. In volunteer study, there was no problem in the calculated value of brain parenchyma. However, the T2 value of cerebrospinal fluid had the error of known value. The results show that it is necessary to set appropriate scan parameters on synthetic MRI.