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Abstract #2528

Comparison of liver motion measured by dynamic MRI and respiration signals obtained by an optical sensor

Julien Sénégas1, Sascha Krueger1, Daniel Wirtz1, Ger Kersten2, Mukul Rocque3, Ivan E. Dimitrov4, Andrea J. Wiethoff5, Keith Hulsey6, Ivan Pedrosa6, and Ananth J. Madhuranthakam6

1Philips Research Laboratories, Hamburg, Germany, 2Philips Innovation Services, Eindhoven, Netherlands, 3Philips Research Laboratories, Eindhoven, Netherlands, 4Philips Healthcare, Gainesville, FL, United States, 5Philips Research North America, Cambridge, MA, United States, 6Department of Radiology and Advanced Imaging Research Center, UT Southwestern Medical Center, Dallas, TX, United States

To monitor the breathing status of a subject and to synchronize data acquisition with respiration, external sensors, such as respiratory bellows, are routinely used. These sensors probe only the local breathing motion, and, hence, their signal quality can vary significantly depending on the individual subject’s physiology and morphology as well as the experience of the MR operator. Recently, optical sensors were proposed as an alternative. The purpose of this work was to compare the signals obtained by an optical sensor and by a pressure-based sensor with respect to their ability to represent the true liver motion during breathing.

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