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Erschienen in:
22.11.2018 | Classics in Abdominal Radiology
“Flip-flop enhancement” in renal infarction
Erschienen in: Abdominal Radiology | Ausgabe 4/2019
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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)
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