Focal hepatic lesions: differentiation with MR imaging at 0.5 T
| Autor: | S. C. Malchow, K. J. Van Lom, J. J. Brown, Jae Mun Lee, Joseph K. T. Lee |
|---|---|
| Rok vydání: | 1991 |
| Předmět: |
Adult
Male Pathology medicine.medical_specialty Spleen Malignancy Diagnosis Differential Angioma Lesion medicine Humans Radiology Nuclear Medicine and imaging Cyst Aged Aged 80 and over medicine.diagnostic_test Cysts business.industry Liver Diseases Liver Neoplasms Magnetic resonance imaging Middle Aged medicine.disease Magnetic Resonance Imaging Mr imaging medicine.anatomical_structure Liver Regression Analysis Female Hepatic Cyst medicine.symptom business |
| Zdroj: | Radiology. 179:675-679 |
| ISSN: | 1527-1315 0033-8419 |
| DOI: | 10.1148/radiology.179.3.2027973 |
| Popis: | Magnetic resonance (MR) examinations of 43 patients with 95 focal hepatic lesions (diameter, greater than 1 cm) were analyzed for lesion shape, homogeneity, and relative signal intensity compared with normal liver parenchyma, spleen, and skeletal muscle. On T1-weighted, balanced, and T2-weighted images, most metastases (74%), cavernous hemangiomas (76%), and cysts (82%) were smooth and round or oval, while the hepatocellular carcinomas all had irregular borders (40%) or were lobulated (60%). All lesions with irregular borders were malignant. Seventy percent of metastatic lesions, 85% of cavernous hemangiomas, and 100% of simple hepatic cysts were of homogeneous signal intensity, while 60% of hepatocellular carcinomas were inhomogeneous. Logistic regression analysis of multiple lesion characteristics showed that inhomogeneous lesions had a high likelihood of malignancy, while markedly hyperintense lesions had a very low probability of being malignant, regardless of other traits. Homogeneous lesions that were isointense or hyperintense compared with spleen on balanced images but were not markedly hyperintense on T2-weighted images also had a high likelihood of malignancy. |
| Databáze: | OpenAIRE |
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