Comparison between 3-T magnetic resonance imaging and multi-detector row computed tomography for the preoperative evaluation of rectal cancer

Chan Kyo Kim, Seung Hoon Kim, Dongil Choi, Min Ju Kim, Ho Kyung Chun, Soon Jin Lee, Jong Mee Lee

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

OBJECTIVE: To compare prospectively between 3-T magnetic resonance imaging (MRI) and multidetector row computed tomography (MDCT) for the local staging of rectal cancer. MATERIALS AND METHODS: During a recent 8-month period, both 3-T MRI with a phased array coil and MDCT scanner were used to preoperatively examine 31 consecutive patients. Preoperatively, the 3 experienced reviewers independently assessed the MRI and MDCT findings for the depth of tumor invasion into the rectal wall (T). Regional lymph node metastasis (N) was assessed by the 3 reviewers working in consensus. For T staging, we used a modified T staging (≤T2, T3, and T4 staging). The results of the MRI and MDCT findings were compared based on the diagnosis of the resected specimens. RESULTS: At histopathology, T1 was identified in 8 patients, T2 in 6, and T3 in 17 patients. The sensitivity, specificity, and accuracy for T2 staging or less between MRI and MDCT were 93% and 79%, 88% and 76%, and 91% and 77%, respectively. The sensitivity, specificity, and accuracy for T3 between MRI and MDCT were 92% and 73%, 93% and 83%, and 92% and 78%, respectively; there was a statistically significant difference for the T2 and T3 staging or less (P < 0.01). For N staging, MRI and CT can predict accurately in 88% and 77%, respectively (P > 0.05). CONCLUSIONS: For local staging of rectal cancer, 3-T MRI is more accurate than MDCT for determining the depth of tumor invasion and the extent of lymph node metastasis.

Original languageEnglish
Pages (from-to)853-859
Number of pages7
JournalJournal of Computer Assisted Tomography
Volume31
Issue number6
DOIs
Publication statusPublished - 2007 Nov

Keywords

  • High-field-strength imaging
  • MRI
  • Magnetic resonance
  • Multidetector row computed tomography
  • Neoplasm
  • Rectum
  • Staging

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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