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Microwave coagulation therapy on hepatomas: CT and MR appearance after therapy
Author(s) -
Hyodoh Hideki,
Hyodoh Kazusa,
Takahashi Koji,
Furuse Makoto,
Kawamoto Chiaki,
Isoda Norio,
Hozumi Masanori,
Ido Kenichi,
Hirota Norio
Publication year - 1998
Publication title -
journal of magnetic resonance imaging
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.563
H-Index - 160
eISSN - 1522-2586
pISSN - 1053-1807
DOI - 10.1002/jmri.1880080228
Subject(s) - medicine , magnetic resonance imaging , lesion , nuclear medicine , hccs , gadolinium , radiology , hepatocellular carcinoma , pathology , chemistry , organic chemistry
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.