Radiological Physics and Technology

, Volume 12, Issue 4, pp 417–425 | Cite as

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

  • Yasuo TakatsuEmail author
  • Masafumi Nakamura
  • Kenichiro Yamamura
  • Satoshi Sawa
  • Masaki Asahara
  • Michitaka Honda
  • Tosiaki Miyati


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).


Magnetic resonance imaging Fat suppression Uniformity Normalized absolute average deviation Mask method 



This research received no specific grant from any funding agency in the public, commercial, or not-for-profit sectors.

Compliance with ethical standards

Ethical approval

This article does not contain any studies with human participants or animals performed by any of the authors.

Conflict of interest

All authors declare that there is no conflict of interest.


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Copyright information

© Japanese Society of Radiological Technology and Japan Society of Medical Physics 2019

Authors and Affiliations

  1. 1.Department of Radiological Technology, Faculty of Health and WelfareTokushima Bunri UniversitySanukiJapan
  2. 2.Division of Health Sciences, Graduate School of Medical SciencesKanazawa UniversityKanazawaJapan
  3. 3.Department of RadiologyOtsu City HospitalOtsuJapan
  4. 4.Department of RadiologyOsaka Medical College HospitalTakatsukiJapan
  5. 5.Department of Diagnostic RadiologyJapanese Red Cross Society Kyoto Daiichi HospitalKyotoJapan

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