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Related Experiment Videos

Adrenal gland: MR imaging.

A Chang, H S Glazer, J K Lee

    Radiology
    |April 1, 1987
    PubMed
    Summary

    Magnetic resonance (MR) imaging helps visualize the adrenal gland. A specific adrenal mass-to-fat ratio on MR scans aids in differentiating adrenal adenomas from malignant tumors.

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    Area of Science:

    • Radiology
    • Medical Imaging
    • Oncology

    Background:

    • Adrenal gland imaging is crucial for diagnosing various conditions.
    • Differentiating benign adrenal adenomas from malignant neoplasms can be challenging.
    • Magnetic resonance (MR) imaging offers potential for improved characterization of adrenal masses.

    Purpose of the Study:

    • To evaluate the effectiveness of MR imaging in visualizing normal adrenal glands.
    • To assess the utility of MR imaging in distinguishing adrenal adenomas from malignant neoplasms.
    • To identify MR imaging parameters that best differentiate these adrenal lesions.

    Main Methods:

    • Prospective study involving 100 patients undergoing MR imaging.
    • Analysis of adrenal gland visibility using T1-weighted spin-echo pulse sequences.
    • Calculation of adrenal mass-to-fat and adrenal mass-to-liver intensity ratios at 2,100/90 msec.
    • Correlation of MR imaging findings with histopathological diagnoses.

    Main Results:

    • The left adrenal gland was visualized in 99% and the right in 91% of cases.
    • T1-weighted spin-echo sequences provided optimal visualization of the adrenal glands.
    • The adrenal mass-to-fat intensity ratio at 2,100/90 msec was highly effective in distinguishing adenomas from malignant neoplasms.
    • Lesions with a ratio ≥ 0.8 were malignant, and those < 0.6 were adenomas.
    • Adrenal mass-to-liver ratios were not found to be helpful in differentiation.

    Conclusions:

    • MR imaging is a valuable tool for visualizing the adrenal gland.
    • The adrenal mass-to-fat intensity ratio is a promising quantitative parameter for differentiating adrenal adenomas from malignant neoplasms.
    • Further research with larger cohorts is necessary to establish the definitive sensitivity and specificity of MR imaging in adrenal mass characterization.

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