Abstract #4399

Simultaneous Acquisition of Image & Navigator Slices using CAIPIRINHA

Zarko Celicanin¹, Frank Preiswerk², Patrik Arnold², Philippe Cattin², Klaus Scheffler¹, Francesco Santini¹

¹Radiological Physics, University of Basel Hospital, Basel, Switzerland; ²Medical Imaging Analysis Center, University of Basel, Basel, Switzerland

Respiratory organ motion is a complicating factor in many treatments. Novel respiratory correlated MR imaging method was recently purposed that acquires a full 2D sagittal navigator image and builds 4D-MRI organ model. Image and navigator slices were acquired interleaved. Since the navigator image is used to estimate the exact organ position and shape, a time lag could lead to discrepancy in images and to incorrect models. We describe a new approach to image and navigator acquisition based on multislice CAIPIRINHA, which allows a true simultaneous acquisition with consequent decrease of lag and increase of temporal resolution.