Diffusion weighted MR imaging in the differential diagnosis of haemangiomas and metastases of the liver.

Abstract

BACKGROUND:

The purpose of the study was to evaluate the value of diffusion-weighted imaging in the differential diagnosis of haemangiomas from metastases of the liver. PATIENTS AND METHODS.: We analyzed 69 lesions in 38 patients (33 haemangiomas; 36 metastases) in the retrospective study. Diffusion-weighted imaging was performed using a breath-hold single-shot echo-planar spin echo sequence with three b factors (0, 500 and 1000 sec/mm(2)), and apparent diffusion coefficients (ADCs) were calculated. For the quantitative evaluation, signal intensity of the lesions, lesion-to-liver signal intensity ratios, ADC of the lesions, and lesion-to-liver ADC ratios were compared between the groups. The statistical significance was determined by student's-t test.

RESULTS:

With the b factor 500 sec/mm(2), no statistical significance was achieved (p>0.05). With the b factor of 1000 sec/mm(2), both the signal intensity and lesion-to-liver signal intensity ratio of the metastases were significantly higher than those for haemangiomas (p<0.001). The cut-off value at 2.6 yielded a sensitivity of 86% and a specificity of 82% for the lesion-to-liver signal intensity ratio. The ADC, and lesion-to-liver ADC ratio of the metastases were significantly lower than those of haemangiomas (p<0.001). With cut-off value of 1.7, ADC ratio had a sensitivity of 88% and a specificity of 72% for ADC lesion/liver.

CONCLUSIONS:

Diffusion-weighted imaging with high b value may help in the differential diagnosis of metastases from haemangiomas of the liver.

• Authors: Nagihan Inan, Furkan Kilinc, Tahsin Sarisoy, Sevtap Gumustas, Gur Akansel, Ali Demirci
• Journal: Radiology and oncology (Radiol Oncol) Vol. 44 Issue 1 Pg. 24-9 (Mar 2010) ISSN: 1318-2099 [Print] Poland
• PMID: 22933887 (Publication Type: Journal Article)