OBJECTIVE: To determine the findings of various focal @entity99 at contrast-enhanced gray-scale ultrasound (US) using a @entity4917 ( @entity4917 ) technique and emphasizing lesion characterization. MATERIALS AND METHODS: The study involved 95 @entity1 with 105 focal @entity99 , namely 51 @entity157 ( @entity157 ), 22 @entity3 , 22 @entity2695 , four cases of @entity4383 ( @entity4383 ), and six nontumorous nodules. After the injection of a microbubble contrast agent (SH U 508A), gray-scale harmonic US studies using a @entity4917 technique were performed with a combination of continuous scanning to assess the intratumoral vasculature (vascular imaging) and interval-delay scanning to determine the sequential enhancement pattern (acoustic emission imaging). Each imaging pattern was categorized and analyzed. RESULTS: At vascular imaging, 69% of @entity157 (35/51) showed irregular branching vessels, while in 91% of @entity3 (20/22) a peripherally stippled pattern was observed. Intratumoral vessels were absent in 95% of @entity2695 (21/22) and all nontumorous lesions (6/6), while in 75% of FNHs (3/4) a spoke-wheel pattern was evident. At acoustic emission imaging, 71% of @entity157 (36/51) showed heterogeneous enhancement and 86% (19/22) of @entity3 showed rim- or flame-like peripheral enhancement during the early phase, with washout occurring in all @entity157 and @entity3 (100%, 73/73) during the late phase. In @entity2695 , enhancement was either peripheral and nodular (19/22, 86%) or persistent and homogeneous (3/22, 14%), and 75% of FNHs (3/4) became isoechoic during the late phase. CONCLUSION: At contrast-enhanced gray-scale US using a @entity4917 technique, a period of continuous scanning depicted the intratumoral vasculature, and interval-delay scanning demonstrated the sequential enhancement pattern. The characteristic findings of various focal @entity99 were thus determined.

Focal XXXX : evaluation with contrast-enhanced gray-scale harmonic US.

@entity1 :: ('9606', 'Species') :: ['patients'] @entity2695 :: ('MESH:D006391', 'Disease') :: ['hemangiomas'] @entity4383 :: ('MESH:D020518', 'Disease') :: ['FNH', 'focal nodular hyperplasia'] @entity3 :: ('MESH:D009362', 'Disease') :: ['metastases'] @entity4917 :: ('MESH:D007715', 'Disease') :: ['coded harmonic angio', 'CHA'] @entity157 :: ('MESH:D006528', 'Disease') :: ['HCCs', 'hepatocellular carcinomas'] @entity99 :: ('MESH:D056486', 'Disease') :: ['hepatic lesions']
@entity99 :: (MESH:D056486,Disease) :: ['hepatic lesions']
