Abstract
PURPOSE: To evaluate contrast agent-enhanced ultrasonography (US) in the detection of untreated tumor after radio-frequency (RF) ablation of hepatic metastases. MATERIALS AND METHODS: Twenty patients with solitary colorectal liver metastases underwent percutaneous RF tumor ablation. Pre- and postablation imaging was performed with nonenhanced and enhanced color and power Doppler US and contrast-enhanced helical computed tomography (CT). Initial follow-up CT and US were performed 24 hours after ablation. The findings at US and CT were compared. RESULTS: Nonenhanced US demonstrated intratumoral signal in 15 of 20 metastases before ablation. This signal increased after contrast agent administration. Contrast-enhanced US performed 24 hours after ablation demonstrated residual foci of enhancement in the tumors, whereas no US signals were seen in any tumor on nonenhanced scans. CT demonstrated small (
Original language | English |
---|---|
Pages (from-to) | 643-649 |
Number of pages | 7 |
Journal | Radiology |
Volume | 211 |
Issue number | 3 |
Publication status | Published - Jun 1999 |
Keywords
- Liver neoplasms, secondary
- Liver neoplasms, US
- Radiofrequency (RF) ablation Ultrasound (US), contrast media
- Ultrasound (US), Doppler studies
- Ultrasound (US), power Doppler studies
ASJC Scopus subject areas
- Radiological and Ultrasound Technology