Chemical-shift MRI versus washout CT for characterizing adrenal incidentalomas.
OBJECTIVE
To compare the accuracy of computed tomography (CT) and magnetic resonance imaging (MRI) in characterizing adrenal masses.


METHODS
A total of 45 adrenal masses in 38 patients underwent unenhanced CT, enhanced CT, and chemical-shift MRI. Sensitivities and accuracies using the lesion attenuation values, absolute or relative percentage washout for CT, and adrenal-to-spleen ratio or signal intensity index for MRI were calculated. Follow-up or histopathology was used as standard reference.


RESULTS
A total of 15 lipid-rich adenomas, 6 lipid-poor adenomas, and 24 nonadenomas were obtained. The sensitivities for adenoma on MRI versus CT were 81% and 95%, respectively. The specificities were 100%.


CONCLUSIONS
CT is superior to MRI in characterizing adenomas.
Department of Diagnostic Radiology, Zagazig University, Egypt. Electronic address: mohamadwarda_1@hotmail.com.
Mohammad H Abo
MH
Warda
Department of Diagnostic Radiology, Zagazig University, Egypt. Electronic address: samarshehata2003@gmail.com.
Samar M
SM
Shehata
Department of Diagnostic Radiology, Zagazig University, Egypt. Electronic address: fatmamzaiton@hotmail.com.
Fatma
F
Zaiton
D000310:Adrenal Gland Neoplasms / Q000000981:diagnostic imaging*; D000311:Adrenal Glands / Q000000981:diagnostic imaging; D000328:Adult; D000368:Aged; D003287:Contrast Media; D005260:Female; D006801:Humans; D007472:Iohexol; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D011856:Radiographic Image Enhancement; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014057:Tomography, X-Ray Computed / Q000379:methods*
D003287:Contrast Media; D007472:Iohexol
Adrenal masses; Chemical-shift MRI; Lipid-poor adenoma; Washout CT