Welcome to Classifications and Online Calculators in Radiology

This site was build along with the Atlas of Radiology Images to support your knowledge in radiology.

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that are used in radiology and related fields with free access.

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    Adrenal lesion characterization by washout on a three-phase CT

    Characterization of adrenal masses that are less than 3cm in diameter can be achieved by calculating its washout on a three-phase CT acquisition (unenhanced, venous, and delayed phase). It does not apply to masses that have a specific appearance such as myelolipoma (fat attenuation). Lesions with attenuation ≤10HU on unenhanced scan are lipid-rich adenomas.

    Imaging

    • Unenhanced
    • 150 ml iodine c.m. i.v. 2 ml/s
    • Venous phase at 60 s
    • Delayed scan at 15 min
    • ROI min. 1/2 size of the lesion
    Parameter Value  
    Unenhanced attenuation HU
    Venous phase attenuation * HU
    Delayed phase attenuation * HU
       
    * Required fields
     
     
    Clear

    References:

    1. Blake MA, Kalra MK, Sweeney AT, Lucey BC, et al. Distinguishing benign from malignant adrenal masses: multi-detector row CT protocol with 10-minute delay. Radiology. 2006;238:578-585.

    Updated 9/9/2018 17:29 by Lambert
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