TY - JOUR
T1 - A mask method to assess the uniformity of fat suppression in phantom studies
AU - Takatsu, Yasuo
AU - Nakamura, Masafumi
AU - Yamamura, Kenichiro
AU - Sawa, Satoshi
AU - Asahara, Masaki
AU - Honda, Michitaka
AU - Miyati, Tosiaki
N1 - Publisher Copyright:
© 2019, Japanese Society of Radiological Technology and Japan Society of Medical Physics.
PY - 2019/12/1
Y1 - 2019/12/1
N2 - 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).
AB - 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).
KW - Fat suppression
KW - Magnetic resonance imaging
KW - Mask method
KW - Normalized absolute average deviation
KW - Uniformity
UR - https://www.scopus.com/pages/publications/85071122474
UR - https://www.scopus.com/pages/publications/85071122474#tab=citedBy
U2 - 10.1007/s12194-019-00531-9
DO - 10.1007/s12194-019-00531-9
M3 - Article
C2 - 31422526
AN - SCOPUS:85071122474
SN - 1865-0333
VL - 12
SP - 417
EP - 425
JO - Radiological Physics and Technology
JF - Radiological Physics and Technology
IS - 4
ER -