Microwave coagulation therapy on hepatomas: CT and MR appearance after therapy

✍ Scribed by Hideki Hyodoh; Kazusa Hyodoh; Koji Takahashi; Makoto Furuse; Chiaki Kawamoto; Norio Isoda; Masanori Hozumi; Kenichi Ido; Norio Hirota

• Publisher: John Wiley and Sons
• Year: 1998
• Tongue: English
• Weight: 951 KB
• Volume: 8
• Category: Article
• ISSN: 1053-1807
• DOI: 10.1002/jmri.1880080228

✦ Synopsis

Abstract

Laparoscopic microwave coagulation (LMC) for hepatocellular carcinomas (HCCs) was performed on 26 HCCs in 17 patients. Contrast‐enhanced CT (CECT) and MR images (T1‐weighted imaging [T1WI], T2WI, gadolinium‐diethylenetriamine pentaacetic acid [Gd‐DTPA] T1WI) were obtained to determine changes over time. The irradiated center exhibited low to moderate intensity with surrounded high intensity (HI) on T2WI and Gd‐DTPA T1WI. On T1WI, lesions showed four patterns of intensity: uniform HI (30.8%), arcuate HI (26.9%), mainly low with spot HI (30.8%), and isointensity to hypointensity (11.5%). Follow‐up imaging at more than 170 days revealed isointensity to hypointensity on T1WI (96.2%) and reduced HI on T2‐weighted imaging (T2WI) and Gd‐DTPA T1WI. All lesions became less conspicuous and were reduced in volume. HCC shows time‐related changes in signals and size after LMC. Identifying the irradiated lesion is necessary to estimate the adequacy of treatment by comparison with the pretherapeutic image.