Differentiation of adrenal masses with MR imaging: comparison of techniques.
| Autor: | Reinig JW; Anne Arundel MRI, Annapolis, MD 21403., Stutley JE, Leonhardt CM, Spicer KM, Margolis M, Caldwell CB |
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| Jazyk: | angličtina |
| Zdroj: | Radiology [Radiology] 1994 Jul; Vol. 192 (1), pp. 41-6. |
| DOI: | 10.1148/radiology.192.1.8208962 |
| Abstrakt: | Purpose: To determine the efficacy of various magnetic resonance (MR) imaging sequences for the differentiation of adrenal masses. Materials and Methods: Fifty-three adrenal masses in 46 patients (adenomas, metastases, myelolipomas, hemorrhages, and pheochromocytomas) were evaluated by means of T1-, T2-, and T2*-weighted sequences, calculated T2 values, chemical shift imaging techniques, and dynamic contrast material-enhanced imaging. The Student t test and receiver operating characteristic analysis were used to evaluate the differences in the groups of masses. Results: Analysis of the chemical shift-induced signal intensity of the adrenal masses and the T2*-weighted sequence enabled differentiation of adenomas, metastases, and pheochromocytomas. Adenomas and pheochromocytomas were also differentiated by means of a heavily T2-weighted sequence. Signal intensity values for all masses overlapped. Conclusion: Although a chemical shift imaging technique and a T2*-weighted sequence helped correctly differentiate among the groups of adrenal masses, the degree of overlap suggests that it is still difficult to evaluate disease in individual patients. |
| Databáze: | MEDLINE |
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