T2 relaxation times of hypervascular and non-hypervascular liver lesions: Do hypervascular lesions mimic haemangiomas on heavily T2-weighted MR images?

Autor: Peter F. Hahn, John A. Kaufman, M. Foley, Sanjay Saini, M.M.J. McNicholas, J A Echeverri, E G McFarland
Rok vydání: 1996
Předmět:
Zdroj: Clinical Radiology. 51:401-405
ISSN: 0009-9260
DOI: 10.1016/s0009-9260(96)80157-7
Popis: Aim : To correlate the T2 relaxation times of liver lesions with their vascularity at angiography and to determine whether hypervascular lesions have similar signal intensity to haemangiomas on heavily T2-weighted MR images. Patients and methods : Thirty-four patients with histologically proven malignant liver lesions had both angiography and T2W (SE 3000/80,160) MR imaging (1.5T) of the liver. Angiographically, the lesions were hypervascular in 15 and non-hypervascular in 19 patients. Fifteen additional patients with proven haemangioma also had MR imaging during the same time period. The T2 relaxation time of a representative lesion was calculated for each patient and the results compared. Results : The mean T2 time for hypervascular lesions was 76 ± 21 ms compared with 79 ± 18 ms for non-hypervascular lesions ( P =0.61). The mean T2 relaxation time for haemangiomas was significantly longer than either group: 147 ± 46 ms ( P = 0.0001). Conclusion : The T2 relaxation times of hypervascular and non-hypervascular liver lesions are similar and are significantly shorter than those of haemangiomas. Therefore, hypervascular lesions should not mimic haemangiomas on heavily T2-weighted images.
Databáze: OpenAIRE
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