Universität zu Köln

Caglic, Iztok, Hansen, Nienke L., Slough, Rhys A., Patterson, Andrew J. and Barrett, Tristan (2017). Evaluating the effect of rectal distension on prostate multiparametric MRI image quality. Eur. J. Radiol., 90. S. 174 - 181. CLARE: ELSEVIER IRELAND LTD. ISSN 1872-7727

Full text not available from this repository.

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 < 0.001. A significant correlation was shown between increased rectal distension and both reduced DW image quality (r = -0.628, p < 0.001), and increased DW image distortion (r = 0.814, p < 0.001). There was also a significant trend for rectal distension to increase artefact at DWI (r = 0.154, p = 0.042). Increased rectal distension led to increased motion artefact on T2 (p = 0.0096), but did not have a significant effect on T2-sharpness (p = 0.0638). There was no relationship between rectal distension and DCE image quality (p = 0.693). 63 patients underwent lesion-targeted biopsy post MRI, there was a trend to higher positive predictive values in patients with minor rectal distension (34/38, 89.5%) compared to those with moderate/marked distension (18/25, 72%), p = 0.09. 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. (C) 2017 Published by Elsevier Ireland Ltd.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Caglic, Iztok UNSPECIFIED UNSPECIFIED UNSPECIFIED Hansen, Nienke L. UNSPECIFIED UNSPECIFIED UNSPECIFIED Slough, Rhys A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Patterson, Andrew J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Barrett, Tristan UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-231673
DOI:	10.1016/j.ejrad.2017.02.029
Journal or Publication Title:	Eur. J. Radiol.
Volume:	90
Page Range:	S. 174 - 181
Date:	2017
Publisher:	ELSEVIER IRELAND LTD
Place of Publication:	CLARE
ISSN:	1872-7727
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language DIFFUSION-WEIGHTED MRI; ENDORECTAL COIL; VERSION 2; ARTIFACTS; CANCER; RADIOTHERAPY; DISTORTION; 3T Multiple languages Radiology, Nuclear Medicine & Medical Imaging Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/23167