[Magnetic resonance in hepatic lesions. Experience with a 1.5-T magnetic field].
Forty-one patients with histologically proven hepatic lesions (6 cysts, 6 hemangiomas, 8 hepatomas, 19 metastases and 2 negative cases) were studied with Magnetic Resonance (MR) imaging at 1.5 T, and with US and CT. This prospective study was aimed at evaluating: the comparative accuracy of MR, US and CT; the sensitivity and specificity of spin-echo (SE) vs FISP pulse sequences; the efficacy of T1 and T2 relaxation time values in differentiating hemangiomas from hepatomas and metastases. MR diagnostic accuracy was 94.7% vs 89.4% of CT and 84.2% of US. FISP sequences provided 60% sensitivity and 66% specificity. T2 relaxation time values were statistically significant (p less than 0.05) in differentiating hemangiomas (T2 range: 80.9-218.9 ms) from hepatomas (T2 range: 59.4-83.2 ms). The differences in mean T2 values between hemangiomas and metastases (T2 range 54.3-177.3 ms) were not statistically significant (p greater than 0.25).
Squillaci
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Istituto di Radiologia, II Università di Tor Vergata, Roma.
Cecconi
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L
Tipaldi
L
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Grandinetti
M L
ML
Orlacchio
A
A
Squillaci
S
S
D006528:Carcinoma, Hepatocellular / Q000175:diagnosis / Q000556:secondary; D003560:Cysts / Q000175:diagnosis; D003937:Diagnosis, Differential; D005069:Evaluation Studies as Topic; D006391:Hemangioma / Q000175:diagnosis / Q000556:secondary; D006801:Humans; D008099:Liver / Q000000981:diagnostic imaging / Q000473:pathology; D008113:Liver Neoplasms / Q000175:diagnosis* / Q000556:secondary; D008279:Magnetic Resonance Imaging / Q000379:methods*; D013997:Time Factors; D014057:Tomography, X-Ray Computed; D014463:Ultrasonography
La Risonanza Magnetica nelle lesioni epatiche. Esperienza con campo magnetico da 1,5 T.