Abstract #3284

Developing a free-breathing dynamic contrast enhanced scan for Lung Cancer using radial ‘stack-of-stars’ technique

Shivani Kumar^1,2,3, Robba Rai², Daniel Moses^1,4, Armia George^2,3, Lois Holloway^1,2,3,5,6, Shalini VInod^1,2, and Gary Liney^1,2,3,7

¹The University of New South Wales, Sydney, Australia, ²Liverpool Cancer Therapy Centre, Liverpool, Australia, ³Ingham Institute of Applied Medical Research, Liverpool, Australia, ⁴Prince of Wales Hospital, Randwick, Australia, ⁵Institute of Medical Physics, University of Sydney, Sydney, Australia, ⁶Centre for Medical Radiation Physics, University of Wollongong, Wollongong, Australia, ⁷University of Wollongong, Wollongong, Australia

Dynamic contrast enhanced (DCE) MRI is becoming an increasingly important tool for assessing tumour response, however it's application in lung is limited by respiratory motion. We propose the use of radial acquisition technique to minimise motion by oversampling the centre of k-space albeit with reduced temporal resolution. The initial results show that the radial k-space trajectory is a suitable method for motion compensation which provided a DCE scan of sufficient image quality and temporal resolution which can be used as part of a complete free breathing lung MRI protocol.

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