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Abstract #1307

Ultrasound Monitoring of a Respiratory Phantom for the Development andValidation of Segmented EPI Reconstruction Methods

W. Scott Hoge1, Frank R Preiswerk1, Jonathan R Polimeni2,3, Sanjay Yengul1,4, Pelin Aksit Ciris5, and Bruno Madore1,3

1Radiology, Brigham and Women's Hospital, Boston, MA, United States, 2Radiology, Massachusetts General Hospital, MA, United States, 3Harvard Medical School, Boston, MA, United States, 4Boston University, Boston, MA, United States, 5Dept. of Biomedical Engineering, Akdeniz University, Antalya, Turkey

In MRI, changes in lung volume can affect the static encoding field during brain imaging, inducing phase modulations in the acquired signal. In segmented EPI, these phase modulations manifest as ghost artifacts. To enable rapid development of new segmented EPI image formation methods, this work presents a respiratory phantom that can be monitored using an ultrasound transducer. Using inexpensive materials, the transducer tracks the thickness of a flexible water bottle as the respiratory phantom inflates/deflates. Results verify that phase changes induced by the changing air volume can be observed in both MR and ultrasound data, and are well correlated.

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