programma & abstracts - Nederlandse Vereniging voor Radiologie

6
programma abstracts & abstracts
O6.5
MR-COLONOGRAPHY WITH IODINE-
TAGGED LIMITED BOWEL PREPARATION
AND AUTOMATED CARBON DIOXIDE
INSUFFLATION FOR COLONIC DISTENSION
M.P. van der Paardt, F.M. Zijta, T.N. Boellaard, S. Bipat,
A.J. Nederveen, J. Stoker
Academisch Medisch Centrum, Amsterdam
Introduction: To prospectively evaluate image quality and
diagnostic accuracy of 3.0Tesla MR-colonography using
iodine-tagged preparation and CO2 for bowel distension.
Methods: 40 patients at increased risk for colorectal carcinoma
underwent 3.0Tesla MR-colonography using iodinetagged
bowel preparation and automated CO2 insufflation.
Coronal FS 3D-T1-weighted SPGR were acquired in supine
and prone position, 2D-T2-weighted SSFSE in supine
position. Five parameters (Table) were assessed by two
observers for 6 colon segments (240 segments/observer,
480 segments/sequence). Wilcoxon-signed-rank test was
used for comparison. MR-colonography results were compared
with colonoscopy and sensitivity/specificity were
assessed.
Results: The amount of fecal residue was rated ‘0-25%
of lumen filled’ in 66.9%(321/480) of the images. Overall,
the consistency of the residue was scored ‘liquid’;
93.3%(448/480).
Supine distension was ‘adequate’ to ‘optimal’ in
89.2%(428/480) segments on T1-weighted images
and 90.4%(427/472; 8 missing values) on T2-weighted
series. In the T1-weighted series distension was better in
supine compared to prone position: 89.2%(428/480) versus
74.1%(347/468; 12 missing values), p