Assessment of cerebral microembolism during percutaneous radiofrequency ablation of lung tumors using diffusion-weighted imaging.

Assessment of cerebral microembolism during percutaneous radiofrequency ablation of lung tumors using diffusion-weighted imaging. Research Abstract Details 

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Assessment of cerebral microembolism during percutaneous radiofrequency ablation of lung tumors using diffusion-weighted imaging. Abstract Text:

Akira Yamamoto,Toshiyuki Matsuoka,Masami Toyoshima,Tomohisa Okuma,Yoshimasa Oyama,Masao Hamuro,Keiko Nakayama,Kiyotoshi Inoue,Kenji Nakamura,Yuichi Inoue,

OBJECTIVE: It is well known that radiofrequency ablation generates microbubbles in the liver. We hypothesized that microbubbles generated during percutaneous radiofrequency ablation of lung tumors flow into the pulmonary veins and are distributed to the systemic arteries, as with radiofrequency ablation of liver tumors. To assess the risk of cerebral infarction during radiofrequency ablation of lung tumors, we performed diffusion-weighted imaging and, if possible, monitored microemboli in the carotid artery during radiofrequency ablation. SUBJECTS AND METHODS: We prospectively studied 20 patients (19 men and one woman) who underwent radiofrequency ablation of lung tumors. Pre- and postoperative MRI examinations were performed in all 20 patients, and during 17 radiofrequency ablation sessions, sonography was used to monitor whether microemboli were generated. RESULTS: Radiofrequency ablation was technically feasible for the treatment of selected pulmonary tumors. Microemboli, which were believed to represent microbubbles, were seen on sonography during three of the 17 radiofrequency ablation sessions. They were rarely observed when a lung tumor was small, the treatment session was brief, and the radiofrequency emission power was low. No new area of abnormal intensity was seen on postoperative MRI in all 20 patients. Although the microemboli were observed, MRI could not confirm infarction. CONCLUSION: We concluded that cerebral infarction as a result of microbubbles generated during radiofrequency ablation of lung tumors has a low possibility of becoming a clinical problem.

Assessment of cerebral microembolism during percutaneous radiofrequency ablation of lung tumors using diffusion-weighted imaging. Publishing Authors By Initials

A Yamamoto,T Matsuoka,M Toyoshima,T Okuma,Y Oyama,M Hamuro,K Nakayama,K Inoue,K Nakamura,Y Inoue,

For similar investigative techniques: epidemiologic methods: epidemiologic study characteristics as topic: epidemiologic studies: cohort studies: longitudinal studies: prospective studies research abstracts see: investigative techniques: epidemiologic methods: epidemiologic study characteristics as topic: epidemiologic studies: cohort studies: longitudinal studies: prospective studies research

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Assessment of cerebral microembolism during percutaneous radiofrequency ablation of lung tumors using diffusion-weighted imaging. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: AJR. American journal of roentgenology

VOLUME: 183

Page Numbers: 1785-9

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ISSN: 0361-803X

DAY: 15

MONTH: Dec

YEAR: 2004

Assessment of cerebral microembolism during percutaneous radiofrequency ablation of lung tumors using diffusion-weighted imaging. Information

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LANGUAGE: eng

NlmUniqueID: 7708173

Assessment of cerebral microembolism during percutaneous radiofrequency ablation of lung tumors using diffusion-weighted imaging. Keywords Mesh Terms:

KEYWORDS: Prospective Studies

MESH TERMS: surgery

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Grant and Affiliation Information for Assessment of cerebral microembolism during percutaneous radiofrequency ablation of lung tumors using diffusion-weighted imaging.

AFFILIATION: Department of Radiology, Osaka City University Graduate School of Medicine, 1-4-3 Asahi-machi, Abeno-ku, Osaka 545-8585, Japan.

Country: United States

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MEDLINETA: AJR Am J Roentgenol

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