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Abstract #1481

Respiratory motion based dynamic keyhole reconstruction for real-time thoracic MRI

Danny Kyejun Lee 1 , Sean Pollock 1 , Peter Greer 2 , Taeho Kim 1 , and Paul Keall 1

1 Radiation Physics Laboratory, Sydney Medical School, The University of Sydney, Camperdown, NSW, Australia, 2 The University of Newcastle, NSW, Australia

The dynamic keyhole method using respiratory signals has been demonstrated to reconstruct MR images with the considerably small amount of central phase encoding lines, linked to real-time thoracic imaging with minimal image intensity loss on tumor. These results suggest that the dynamic keyhole method could be a desirable technique for image-guided radiation therapy and MRI-guided radiotherapy that require real-time MR monitoring in thoracic region.

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