High-resolution T2-weighted (T2W) oblique plane turbo spin-echo (TSE) MRI for rectal adenocarcinoma staging

Christian B van der Pol; Wael M Shabana; Matthew D McInnes; Nicola Schieda

doi:10.1016/j.clinimag.2015.01.014

High-resolution T2-weighted (T2W) oblique plane turbo spin-echo (TSE) MRI for rectal adenocarcinoma staging

Clin Imaging. 2015 Jul-Aug;39(4):627-31. doi: 10.1016/j.clinimag.2015.01.014. Epub 2015 Feb 2.

Authors

Christian B van der Pol¹, Wael M Shabana², Matthew D McInnes³, Nicola Schieda⁴

Affiliations

¹ Department of Diagnostic Imaging, The Ottawa Hospital, 1053 Carling Avenue, Ottawa, ON, K1Y 4E9, Canada. Electronic address: cvanderpol@toh.on.ca.
² Department of Diagnostic Imaging, The Ottawa Hospital, 1053 Carling Avenue, Ottawa, ON, K1Y 4E9, Canada. Electronic address: wshabana@toh.on.ca.
³ Department of Diagnostic Imaging, The Ottawa Hospital, 1053 Carling Avenue, Ottawa, ON, K1Y 4E9, Canada. Electronic address: mmcinnes@toh.on.ca.
⁴ Department of Diagnostic Imaging, The Ottawa Hospital, 1053 Carling Avenue, Ottawa, ON, K1Y 4E9, Canada. Electronic address: nschieda@toh.on.ca.

PMID: 25698670
DOI: 10.1016/j.clinimag.2015.01.014

Abstract

Purpose: The purpose of this study was to determine the frequency/significance of incorrectly planned oblique T2-weighted (T2W) MRI of rectal adenocarcinoma.

Methods: Eighty-six consecutive patients underwent MRI for rectal cancer staging. Two radiologists evaluated oblique T2W imaging and tumor stage.

Results: A total of 71% of middle/high tumors had correctly planned oblique T2W-MRI. Thirteen of 14 low tumors (N=7) or tumors spanning at least two rectal segments (N=7) had incorrectly planned oblique T2W-MRI. The sensitivity/specificity of staging on correct compared to incorrect oblique T2W was: 88.9/50% (R1)/77.8/60% (R2) and 80/100% (R1)/60/80% (R2), (P=.54). Agreement was substantial, K=0.67.

Conclusions: Oblique T2W-MRI is incorrectly performed in low tumors and those spanning multiple rectal segments. In this study, planning errors did not impact staging accuracy.

Keywords: Magnetic resonance imaging (MRI); Rectal adenocarcinoma; Staging; T2 weighted.

MeSH terms

Adenocarcinoma / pathology*
Aged
Aged, 80 and over
Female
Humans
Magnetic Resonance Imaging / methods*
Male
Middle Aged
Neoplasm Staging
Rectal Neoplasms / pathology*
Sensitivity and Specificity