Evaluating the effect of rectal distension on prostate multiparametric MRI image quality

Published on May 1, 2017in European Journal of Radiology3.528
· DOI :10.1016/J.EJRAD.2017.02.029
Iztok Caglic9
Estimated H-index: 9
(University of Cambridge),
Nienke L. Hansen9
Estimated H-index: 9
(University of Cambridge)
+ 2 AuthorsTristan Barrett37
Estimated H-index: 37
(University of Cambridge)
Sources
Abstract
Abstract Purpose To evaluate the effect of rectal distension on the quality of anatomical and functional prostate multiparametric (mp) MRI. Materials and methods Multiparametric (mp) 3T-MRI images of 173 patients were independently evaluated by two radiologists in this retrospective study. Planimetry rectal volumes were derived and a subjective assessment of rectal distension was made using a 5-point Likert scale (1 = no stool/gas, 5 = large amount of stool/gas). Image quality of diffusion-weighted imaging (DWI) was evaluated using a 5-point Likert scale. DWI was further scored for distortion and artefact. T2W images were evaluated for image sharpness and the presence of motion artefact. The stability of the dynamic contrast-enhancement acquisition was assessed by recording the number of corrupt data points during the wash-out phase. Results There was a strong correlation between subjective scoring of rectal loading and objectively measured rectal volume (r = 0.82), p  Conclusion Rectal distension has a significant negative effect on the quality of both T2W and DW images. Consideration should therefore be given to bowel preparation prior to prostate mpMRI to optimise image quality.
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