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. 2021 Feb 19;41(2):509–523. doi: 10.1148/rg.2021200049

Figure 4b.

Constrained spectral FOV for the abdomen. Axial portovenous phase dual-source DECT images in a 20-year-old man with tuberous sclerosis. (a) Color overlay MD-fat image shows an 8-mm liver lesion (arrow) just within the limits of the spectral FOV. The limits of the FOV are sharply demarcated, and patient anatomy outside the field (arrowheads) is not color coded (ie, has no spectral information). (b) MD-iodine image shows no iodine uptake qualitatively or quantitatively (0.2 mg/mL) within the lesion (arrow), and quantitation confirms the presence of fat (75%), suggestive of angiomyolipoma. Material analysis of the lesion was possible because it lay within the spectral FOV.

Constrained spectral FOV for the abdomen. Axial portovenous phase dual-source DECT images in a 20-year-old man with tuberous sclerosis. (a) Color overlay MD-fat image shows an 8-mm liver lesion (arrow) just within the limits of the spectral FOV. The limits of the FOV are sharply demarcated, and patient anatomy outside the field (arrowheads) is not color coded (ie, has no spectral information). (b) MD-iodine image shows no iodine uptake qualitatively or quantitatively (0.2 mg/mL) within the lesion (arrow), and quantitation confirms the presence of fat (75%), suggestive of angiomyolipoma. Material analysis of the lesion was possible because it lay within the spectral FOV.