Fig. 1
From: Characteristics of high frame frequency contrast-enhanced ultrasound in renal tumors
C-CEUS and H-CEUS images of malignant nodules. The nodule was pathologically confirmed as clear cell renal cell carcinoma. (A) A shallow echo mass on the superior pole of the right kidney with a clear boundary, regular shape, and anechoic area. (B) The time of arrival of C-CEUS, which first arrives at the periphery (white short arrow) and center (red short arrow) of the lesion. (C-F) The C-CEUS perfusion process: the contrast medium diffuses enhancement from the periphery and center. (G) The C-CEUS peak time image shows non-uniform high enhancement. (H) Rich blood flow signals are in focus, grade III. (I) The time of arrival of H-CEUS, which first arrives at the periphery of the lesion (white short arrow). (J-M) The perfusion process of the contrast medium: the contrast medium enters from the periphery to the center, showing centripetal enhancement. (N) The peak time of H-CEUS shows non-uniform high enhancement (the long white arrow indicates the extent of the lesion)