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Abstract #3483

Quantification of Parotid Fat Content and ADC Using IDEAL Gradient Echo Imaging and PROPELLER-DWI

Chun-Jung Juan1,2, Hing-Chiu Chang3, Yin-Cheng Kris Huang1,4, Hua-Shan Liu1, Chun-Jen Hsueh1, Cheng-Yu Chen1,2, Hung-Wen Kao1, Hsiao-Wen Chung1,4, Guo-Shu Huang1,2

1Radiology, Tri-Service General Hospital, Taipei, Taiwan; 2Radiology, National Defense Medical Center, Taipei, Taiwan; 3Applied Science Laboratory, GE Healthcare, Taipei, Taiwan; 4Electrical Engineering, National Taiwan University, Taipei, Taiwan

Parotid fat content changes in aging process. While quantifying the parotid apparent diffusion coefficient (ADC), it is better when the parotid fat content is taken into account. The issues how parotid fat content varies with age and what impact of parotid fat content on the measurement of parotid ADC remain unclear so far. In this study, we quantified the parotid fat content using RF saturation (T1WI and PROP-T2WI) and IDEAL gradient echo imaging and measured the parotid ADC using non-fat-saturated PROP-DWI. Our results show that the parotid fat content is positively correlated with age and negatively correlated with parotid ADC.