FIGURE 2.

A, One-minute postinjection posterior dynamic planar image of patient 1 demonstrating a subtle photopenic defect in the cortex of the upper pole of the right kidney at the site of the patient’s known oncocytoma (arrowhead). The patient was status post-left nephrectomy, hence the lack of visualization of the left kidney. B, Thirty-minute postinjection posterior dynamic planar image of the same patient. There has been fill-in of the large right upper pole oncocytoma (arrowhead) with relative retention of radiotracer in the mass higher than that in the surrounding normal renal parenchyma.