![]() For MR, on spin-echo T1-weighted images, adrenal glands have intermediate signal intensity (less than fat and similar to the liver) on T2-weighted and fat-suppressed images, adrenal glands are much brighter than fat and slightly brighter than the liver (Fig. On CT, the adrenal gland’s soft tissue attenuation is similar to the liver (Fig. CT and MR can similarly demonstrate detailed information on adrenal anatomy though, in determining the modality of choice, their respective risks and benefits should be considered (e.g., radiation exposure from CT and the risk of sedation during MR). To estimate normal adrenal size, the adrenal glands should be thinner than the adjacent diaphragmatic crura on axial images. The left adrenal gland lies medial to the spleen, lateral to the aorta and left crus of the diaphragm, and posterior to the pancreatic tail and stomach. ![]() The right adrenal gland lies medial to the right lobe of the liver, lateral to the right crus of the diaphragm, and posterior to the inferior vena cava. ![]() ![]() The adrenal glands can be visualized anteromedial to the upper pole of the ipsilateral kidney at all ages on both CT and MR. ![]()
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