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British Journal of Radiology (1995) 68, 1198-1203
© 1995 British Institute of Radiology
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The British Journal of Radiology, Vol 68, Issue 815 1198-1203, Copyright © 1995 by British Institute of Radiology

ARTICLES

Spin lock magnetic resonance imaging in the differentiation of hepatic haemangiomas and metastases

JT Halavaara, AE Lamminen, S Bondestam, RE Sepponen and JI Tanttu
Department of Radiology, Helsinki University Central Hospital, Finland.

Spin lock (SL) imaging technique, generating T1 rho-weighted images, was applied to the differentiation of hepatic haemangiomas from metastatic focal liver lesions. 17 haemangiomas and 16 metastases in 32 patients were imaged at the field-strength of 0.1 T using a multiple slice SL technique and a conventional gradient-echo (GRE) sequence with identical timing parametres. Spin lock effects of the hepatic lesions and different abdominal tissues were calculated. Images with adequate coverage of the liver and of good quality with few motion induced artefacts were acquired. A definite, statistically significant, difference was found between the SL-effects of hepatic haemangiomas and a liver metastases. Haemangiomas showed an SL effect of 46.6 +/- 3.4% and metastases of 56.2 +/- 5.8% (mean +/- SD, p < 0.0001). The multiple slice SL technique showed potential in distinguishing haemangiomas from metastatic liver lesions and should be considered as an alternative to the conventional T2 and magnetization transfer (MT) based methods.


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