Abstract #3213

A Local Coregistration for Quantitative Evaluation of Distortion of Parotid Gland Tumors in Echo-Planar DWI and PROPELLER DWI

Kai-Min Chien¹, Yi-Jui Liu², Yi-Hsiung Lee ^3,4, Hing-Chiu Chang ⁵, Hui-Chu Chiu ⁶, Ta-Wei Chiu ⁷, Kang Hsu ⁸, Hsian-He Hsu ^4,9, Chun-Jung Juan^4,9, Yu-Shu Fu¹⁰, and CHENG-YI JUAN¹¹

¹Master 's Program of Biomedical Informatics and Biomedical Engineering, Feng Chia University, Taichung City 407, Taiwan, ²Department of Automatic Control Engineering, Feng Chia University, Taichung City 407, Taiwan, ³Ph. D. Program of Electrical and Communications Engineering, Feng Chia University, Taichung City 407, Taiwan, ⁴Department of Radiology, Tri-Service General Hospital, Taipei, Taiwan, ⁵Department of Diagnostic Radiology, The University of Hong Kong, Hong Kong, Hong Kong, ⁶Ph.D. program of Technology Management, Chung Hua University, Hsinchu, Taiwan, ⁷Department of Medicine, Taipei Medical University, Taipei, Taiwan, ⁸Department of Dentistry, National Defense Medical Center, Taipei, Taiwan, ⁹Department of Radiology, National Defense Medical Center, Taipei, Taiwan, ¹⁰Master 's Program of Biomedical Informatics and Biomedical Engineering, Feng Chia University, TAICHUNG, Taiwan, ¹¹Institute of Automatic Control Engineering, Feng Chia University, TAICHUNG, Taiwan

The study is to quantitatively compare the morphology distortion in distinguishing parotid pleomorphic adenomas (PMA) between PROPELLER-DWI and EP-DWI. This retrospective study enrolled 14 PMAs. All participants underwent 1.5-T fat-saturated diffusion-weighted imaging with PROPELLER-DWI and EP-DWI. A local coregistration method to quantitatively evaluate the distortion of parotid gland tumors between single shot EP-DWI and PROPELLER DWI. Imaging distortion represented by Dice coefficient was quantitatively analyzed. Our results showed that PROPELLER-DWI allows distinguishing PMAs with less distortion than EP-DWI.

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