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Abstract #1535

T1 relaxation of the liver; Comparison of the continuous wave and stretched type adiabatic hyperbolic scant (HS) pulses for the assessment of liver function

Yukihisa Takayama 1 , Akihiro Nishie 2 , Yoshiki Asayama 2 , Kousei Ishigami 2 , Yasuhiro Ushijima 2 , Daisuke Okamoto 2 , Nobuhiro Fujita 2 , Koichiro Morita 2 , Tomoyuki Okuaki 3 , and Hiroshi Honda 2

1 Department of Radiology Informatics and Network, Kyushu University, Graduate School of Medical Sciences, Fukuoka, Fukuoka, Japan, 2 Department of Clinical Radiology, Kyushu University, Graduate School of Medical Sciences, Fukuoka, Japan, 3 Philips Healthcare APAC, Tokyo, Japan

Image quality and diagnostic capability to assess liver function of T1ρ map were compared among three different methods: continuous wave pulse(CW), stretched type adiabatic heperbolic scant 8(HS8) pulse with pulse duration of 5ms(adiabatic-HS8-5) and adiabatic-HS8 pulse with pulse duration of 10ms(adiabatic-HS8-10). There was no significant difference in image quality scores between adiabatic-HS8-5 and adiabatic-HS8-10, but both showed significantly higher scores comparing with CW-T1ρ(p<0.05). Regarding the assessment of liver function, CW showed the highest correlation coefficient between T1ρ relaxation and ICG-R15 among three methods. Two adiabatic-HS8-5 pulses allowed generating homogeneous T1ρ maps, but CW was more advantageous to assess liver function.

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