Meeting Banner
Abstract #1316

Comparison of Free-Breathing Versus Navigator-Controlled Diffusion-Weighted MR Imaging of the Kidneys: Effects on ADC Statistics.

Neil Peter Jerome1, Matthew Orton1, James d'Arcy1, David J. Collins1, Dow-Mu Koh2, Martin O. Leach1

1CRUK-EPSRC Cancer Imaging Centre, The Institute of Cancer Research, Sutton, Surrey, United Kingdom; 2Department of Radiology, Royal Marsden Hospital, Sutton, Surrey, United Kingdom

Discussions about the optimum breathing modality for acquiring abdominal diffusion-weighted MR images include consideration of navigator-controlled acquisition to reduce motion blurring, but this is dependent on repeatability of respiratory cycle and is inevitably time-inefficient. Adopting a free-breathing strategy allows greater averaging for the same acquisition time; we show that fitted pefusion-insensitive ADC parameters from the kidneys of a volunteer cohort are not significantly different between navigator-controlled and free-breathing modalities. Global statistics are reported, as well as for renal cortex and pyramid ROIs, and distibutions of ADCs and of signal intensities at each b-value are shown to be not significantly different.

Abstract PDF Poster PDF

Keywords

abdominal acknowledge acquisition acquisitions adept adversely affect afforded agreement aiming amount appear appears arising array averaging basis biomedical blue blurring boundary breath breathing cancer chosen clinical close cohort coils commonly complete complex complications consented controlled cortex cycle decisions degrade degree descriptive detailed diffusion discomfort distribution distributions drawn england ensure even examining extra features fitted fitting form free funding gain global greater highly hold indifference indistinguishable individual insensitive institute intensities involve kidney kidneys kingdom landmarks larger limitations limiting little local long lost many maps martin matched minimize minutes modalities motion movement navigator necessarily nominal normally observations often optimum package particularly parts patient pattern perfusion peter placed proprietary protocol protocols pyramid quality radiology received reduction reflected regarding regimes renal repeatability require respiratory resultant scanner selectively share significantly since slice smaller software statistics strategies studies substantially subtlety succession suitability support surrey table tissues together tolerance track translates unpaired variances versus volunteer volunteers whole yield