Striated nephrogram seen in the right kidney
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The right kidney shows cortical striations, which were best seen in the arterial phase images.
Mild enlargement and pyelectasis can also be seen in the right kidney on coronal images when compared to the non inflamed left kidney.
Pyelonephritis is most oftenly caused by bacterial invasion of the renal parenchyme. Clinical and laboratory findings are usually diagnostic. CT is used to evaluate for abscess formation. Striated nephrogram appears as areas of linear or wedge shaped hypoperfusion.
Other causes of a striated nephrogram include renal vein thrombosis and urinary obstruction.