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Distinguishing adrenal adenomas from non-adenomas on dynamic enhanced CT: a comparison of 5 and 10 min delays after intravenous contrast medium injection
- Source :
- Clinical radiology. 68(7)
- Publication Year :
- 2012
-
Abstract
- Aim To evaluate the usefulness of several parameters of 5 min compared to 10 min delayed contrast-enhanced CT in distinguishing adenomas from non-adenomas. Materials and methods The study population consisted of 94 patients (52 men and 42 women; mean age 62 years) with 103 adrenal lesions (75 adenomas and 28 non-adenomas). In each patient, unenhanced CT was followed by early, 5 and 10 min enhanced CT. Diagnostic parameters included delayed enhanced attenuation at 5 and 10 min, washout attenuation (WO) at 5 and 10 min, absolute percentage washout (APW) at 5 and 10 min, and relative percentage washout (RPW) at 5 and 10 min. The accuracy of each parameter for diagnosing adenomas from non-adenomas was calculated using receiver operating characteristic (ROC) analysis. Results Upon comparison between 5 and 10 min delayed contrast-enhanced CT for differentiating total adenomas or lipid-poor adenomas from non-adenomas, there was no significant difference in the area under the binomial ROC curve ( Az ) values of delayed enhanced attenuation (total adenomas versus non-adenomas, p = 0.164; lipid-poor adenomas versus non-adenomas, p = 0.178), WO (total adenomas versus non-adenomas, p = 0.216; lipid-poor adenomas versus non-adenomas, p = 0.230), APW (total adenomas versus non-adenomas, p = 0.401; lipid-poor adenomas versus non-adenomas, p = 0.870), or RPW (total adenomas versus non-adenomas, p = 0.160; lipid-poor adenomas versus non-adenomas, p = 0.780). Conclusion Five minute contrast-enhanced CT was as useful as 10 min contrast-enhanced CT for differentiation of adrenal adenomas from non-adenomas.
- Subjects :
- Adenoma
Adult
Male
Time Factors
endocrine system diseases
Lymphoma
Adrenal Gland Neoplasms
Contrast Media
Pheochromocytoma
Diagnosis, Differential
Cat scanning
Multidetector Computed Tomography
Medicine
Humans
Radiology, Nuclear Medicine and imaging
Aged
Retrospective Studies
Intravenous contrast
Aged, 80 and over
Neurofibroma
Receiver operating characteristic
business.industry
Significant difference
Washout
Mean age
General Medicine
Middle Aged
digestive system diseases
stomatognathic diseases
Injections, Intravenous
Female
business
Nuclear medicine
Dynamic Enhanced CT
Iodine
Subjects
Details
- ISSN :
- 1365229X
- Volume :
- 68
- Issue :
- 7
- Database :
- OpenAIRE
- Journal :
- Clinical radiology
- Accession number :
- edsair.doi.dedup.....d07b5ca5ef1ce4681c8a453caf78eb5f