Spatial properties of noise in prostate DWI acquired with an endo-rectal coil as critical information for clinical QA
Milica Medved1,2, Aritrick Chatterjee1,2, Ajit Devaraj3, Ambereen Yousuf1,2, Aytekin Oto1,2, and Gregory S Karczmar1,2
1Department of Radiology, The University of Chicago, Chicago, IL, United States, 2Sanford J. Grossman Center of Excellence in Prostate Imaging and Image Guided Therapy, The University of Chicago, Chicago, IL, United States, 3Philips Research NA, Cambridge, MA, United States
Development of quantitative QC methods for prostate DWI is important in clinical practice, necessitating reliable estimates of spatially heterogenous noise. In data obtained at 3T with the use of an endo-rectal coil, we use raw noise measurements to simulate pure-noise k-space datasets that are post-processed to yield noise maps. Good agreement is found between noise levels measured from noise maps in the central prostate and the estimates of noise produced from the anterior rectal ROIs in high TE / high b-value DWI. Thus, noise can be estimated from an anterior rectum region when the endo-rectal coil is used.
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