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Abstract #1589

Improved algorithm for 3D non-contrast pulmonary MRA

Chia-Ling Chang 1 , Tzu-Cheng Chao 1,2 , Maria Alejandra Durn-Mendicuti 3 , Ming-Ting Wu 4,5 , and Bruno Madore 3

1 Department of Computer Science and Information Engineering, National Cheng-Kung University, Tainan, Taiwan, 2 Institute of Medical Informatics, National Cheng-Kung University, Tainan, Taiwan, 3 Department of Radiology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, United States, 4 Department of Radiology, Kaohsiung Veteran General Hospital, Kaohsiung, Taiwan, 5 School of Medicine, National Yang-Ming University, Taipei, Taiwan

In an emergency room context, there is a need for a reliable non-contrast enhanced pulmonary MR angiography method to help handle the large number of patients with suspicion for pulmonary embolism and contra-indication for CT angiography. A promising method was previously introduced whose main weakness might have been the presence of discontinuities at the junction between the several slabs used to cover the chest volume. The present work aimed at alleviating this problem, thus making the overall approach more generally applicable. Through a specially-tailored registration algorithm as well as intensity-correction strategies, such discontinuities have been considerably suppressed here.

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