Implementation of an Active Breathing Coordinator During MRI to Support Radiotherapy Treatment Planning

Evangelia Kaza¹, David John Collins¹, Richard Symonds-Tayler¹, Rafal Panek¹, Wilhelm Horger², Martin O. Leach¹

An Active Breathing Coordinator (ABC) was successfully applied during MRI with a clinically relevant 3D TSE SPACE sequence. The device was implemented for breath holding at a constant lung volume on in- or exhalation, presenting more accurate structure delineation than self-sustained breath holds and equivalent image quality to a navigator application. The ABC can be used for controlled breath holding under similar conditions as during radiotherapy to support treatment planning and assessment.