Findings of multidetector row computed tomography of XXXX treated by HIFU ablation.

@entity1 @entity41 @entity96 @entity5462 @entity14782 @entity157
PURPOSE: We evaluated the efficacy of high-intensity focused ultrasound (HIFU) ablation for @entity157 ( @entity157 ), and a long-term study by follow-up multidetector-row computed tomography (CT) was conducted to evaluate the changes occurring in the treatment area following the HIFU ablation. MATERIALS AND METHODS: HIFU ablation was carried out in 14 @entity1 with small @entity5462 ( <=3 lesions,  <=3cm in diameter). The HIFU system (Chongqing Haifu Tech) was used under ultrasound guidance. The evaluations were performed by follow-up CT at 1 week, 1, 3, 6 and 12 months after the HIFU ablation. RESULTS: HIFU ablation was carried out successfully in 11 of the 14 @entity1 . At 1 week after the HIFU, a peripheral rim @entity14782 was found in all cases (100%). This finding was persistent in 6 of the 11 cases (54.5%) at 1 month, and in 1 of the 11 (9%) cases at 3 months after HIFU ablation. In all cases, the rim @entity14782 disappeared by 6 or 12 months after the HIFU ablation. At the 12 months follow-up, a decrease in the diameter of the ablated lesions was found. The @entity14782 around the treated area was found to be persistent at the 12 months follow-up in the one case of recurrence of the treated site in which the safety margin was not sufficiently wide. During the follow-up period, there were 2 cases with residual of @entity96 . We performed radiofrequency ablation (RFA) for these @entity41 after the HIFU ablation. CONCLUSION: To ascertain the cause of the peripheral @entity14782 on follow-up CT images after the HIFU ablation, in particular, to determine whether it might be caused by @entity41 or recurrence at the treated site, careful follow-up is important, especially in cases where the safety margin of the ablated area was not sufficiently wide.
