Published in:
01-04-2019 | Classics in Abdominal Radiology
“Flip-flop enhancement” in renal infarction
Published in: Abdominal Radiology | Issue 4/2019
Login to get accessExcerpt
The “flip-flop enhancement” is a characteristic radiological finding of renal infarction described on CT images. This appearance is generated by hyperattenuation of the infarcted renal parenchyma in contrast-enhanced CT on delayed phase, showing inverted enhancement compared to the same hypodense region on corticomedullary and nephrographic phases (Fig. 1) [1].
Fig. 1
Schematic representation of contrast-enhanced CT appearance of renal infarction. On early phases, segmental renal infarct may result in a wedge-shaped area of abnormal renal parenchymal hypoenhancement (arrow) compared with the normal portions of the kidney. Conversely, renal infarct appears as an increased attenuation area on delayed phases (arrow)
× ![]()
…