Multimodality imaging of renal inflammatory lesions

Figure 1 Acute pyelonephritis in a 40 years old male. A: US shows soft tissue in bilateral PCS (arrowhead) with increased echogenecity of perinephric fat (arrow); B: CECT nephrographic phase shows bilateral enlarged kidneys with heterogeneous enhancement. There is soft tissue thickening and abnormal enhancement of bilateral PCS and ureter (arrow); C: CECT delayed phase shows striated nephrogram (arrow) seen as linear bands of contrast extending from cortex to medulla. US: Ultrasonography; PCS: Pelvicalyceal system; CECT: Contrast-enhanced computed tomography.