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Eur Radiol. 2011 Nov;21(11):2336-43. doi: 10.1007/s00330-011-2197-0. Epub 2011 Jul 12.

Gd-EOB-DTPA-enhanced 3.0 T MR imaging: quantitative and qualitative comparison of hepatocyte-phase images obtained 10 min and 20 min after injection for the detection of liver metastases from colorectal carcinoma.

Author information

1
Division of Diagnostic Radiology, National Cancer Center Hospital, 5-1-1, Tsukiji, Chuo-ku, Tokyo 104-0045, Japan. ksofue@ncc.go.jp

Abstract

OBJECTIVE:

To compare quantitatively and qualitatively hepatocyte-phase images obtained 10 and 20 min (Images-10, and Images-20) after injection of gadolinium-ethoxybenzyl-diethylenetriamine-pentaacetic acid (Gd-EOB-DTPA) to detect liver metastases from colorectal carcinoma on 3.0 T MR imaging.

METHODS:

A total of 48 patients (26 men, 22 women; mean age, 64 years) with 88 histopathologically confirmed liver metastases underwent Gd-EOB-DTPA-enhanced MR imaging. Tumour-to-liver contrast-to-noise ratio (CNR), signal intensity gain (SIG) of liver parenchyma and overall image quality were analysed. Two radiologists independently reviewed two sets of MR images: set 1, unenhanced (T1- and T2-weighted), dynamic images and Images-10; set 2, unenhanced, dynamic and Images-20. Sensitivity and positive predictive value (PPV) to detect liver metastases, and diagnostic performance using the alternative free-response receiver operating characteristics (AFROC) method were calculated.

RESULTS:

The mean tumour-to-liver CNR, SIG of liver parenchyma and overall image quality on Images-20 were significantly higher than those on Images-10. The overall image quality of "fair to excellent" was achieved on both images in 93.8% of the patients. Sensitivity, PPV and area under the AFROC curve on set 1 were similar to set 2, including lesions <1 cm.

CONCLUSION:

In detecting liver metastases from colorectal carcinoma, Images-10 could replace Images-20 in 3.0 T MR imaging.

PMID:
21748389
DOI:
10.1007/s00330-011-2197-0
[Indexed for MEDLINE]

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