A mask method to assess the uniformity of fat suppression in phantom studies

Yasuo Takatsu, Masafumi Nakamura, Kenichiro Yamamura, Satoshi Sawa, Masaki Asahara, Michitaka Honda, Tosiaki Miyati

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


Fat suppression is a technique used to suppress the signals from adipose tissues, during clinical evaluation of the tissues near the fat–tissue boundary. However, in cases where the scan area has a complicated shape, the effect of fat suppression may demonstrate poor uniformity, resulting in diagnosis-related difficulties. To improve the uniformity of fat suppression, phantom studies are more suitable than volunteer studies. In this study, we evaluated the reliability of the region of interest (ROI) dependency using an unevenness phantom, to develop a method to assess the uniformity of fat suppression while using whole magnetic resonance imaging by masking the surrounding phantom. We modulated different ROI sizes, which were eroded from 100% to approximately 50%, and observed that the normalized absolute average deviation and error increased with decreased ROI. Using our method, more objective, concrete, and accurate data could be obtained by including the whole-body phantom (whole poor uniformity area).

Original languageEnglish
Pages (from-to)417-425
Number of pages9
JournalRadiological Physics and Technology
Issue number4
Publication statusPublished - 01-12-2019
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Radiation
  • Physical Therapy, Sports Therapy and Rehabilitation
  • Radiology Nuclear Medicine and imaging


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