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Abstract #1614

Robust automated Navigator tracker positioning for MRI liver scans

Takao Goto 1 , Shiro Ozaki 2 , Koji Uchida 3 , Hajime Kitagaki 3 , and Hiroyuki Kabasawa 1

1 Global MR Applications and Workflow, GE Healthcare, Hino-shi, Tokyo, Japan, 2 Shimane University Hospital, Izumo-shi, Shimane, Japan, 3 Department of Radiology, Shimane University Faculty of Medicine, Izumo-shi, Shimane, Japan

We present a robust method for automated positioning of a Navigator tracker for MRI liver scans. Our method detects the dome peak of the liver and uses it for Navigator tracker positioning. We used AdaBoost to extract liver dome shape following detection of the edges close to the liver dome and identify the dome peak. During application of our method to 118 volunteers and 53 patients, the tracker did not show any significant mistakes and performed slice tracking successfully. We expect our practical approach to assist the scanning operator and improve workflow.

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