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Abstract #3045

Advancements in Contact-Free Respiration Monitoring Using RF Pick-Up Coils

Ingmar Graesslin1, Giel Mens2, Alexander Guillaume1, Henry Stahl3, Peter Koken1, Peter Vernickel1, Paul Harvey2, Jouke Smink2, Kay Nehrke1, Peter Boernert1

1Philips Research Europe, Hamburg, Germany; 2Philips Healthcare, Best, Netherlands; 3FH Westkste, Heide, Germany

Advanced methods of motion detection and motion artifact reduction help to improve diagnostic image quality. The use of conventional navigators requires additional planning and adversely influences the steady state, which can result in image artifacts. A new approach was presented that uses the detection of changes of RF coil loading induced by the respiratory motion of the patient. This paper describes the application of a real-time self-navigated respiration monitoring approach using dedicated RF monitoring pulses instead the RF excitations of the imaging sequence. RF amplifier drift is analyzed, and a compensation scheme is proposed to overcome this problem.