Intra-arterial CT-angiography for cerebral arteriovenous malformation - Initial experiences for treatment planning of radiosurgery

Etsuo Kunieda, Osamu Kawaguchi, Satoshi Onozuka, Suketaka Momoshima, Atsuya Takeda, Naoyuki Shigematsu, Subaru Hashimoto, Takayuki Ohira, Atsushi Kubo

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4 Citations (Scopus)

Abstract

Purpose: To clarify the feasibility and effectiveness of intra-arterial CT angiography (IACTA) for treatment planning of arteriovenous malformation radiosurgery. Methods and Materials: A CT scanner installed in an angiographic examination room was used. Helical IACTA was performed in 22 patients during continuous intra-arterial infusion of contrast medium via the internal carotid or vertebral artery, and dynamic IACTA was performed in 20 of these patients with reconstruction at 0.2-s intervals. The dynamic IACTA was repeated for each 3- or 5-mm increment to encompass the nidus. Subtractions were performed in postembolization cases. A retrospective review of IACTA was performed to assess the effectiveness of dynamic scans. Results: No complications related to the angiographic procedure or CT imaging were detected. High contrast enhancement was obtained for both helical and dynamic IACTA. In 18 of the 20 cases (90%), draining veins were separated from the nidus by using the enhancement patterns, and in 13 cases (65%), feeding arteries were separated. Conclusion: Dynamic IACTA added important information for target-volume determinations. Conventional CT and MRI could be omitted from the protocol, and the period that patients wore the frame was substantially shortened. We conclude that IACTA is a practical and useful method for radiosurgical treatment planning of arteriovenous malformations.

Original languageEnglish
Pages (from-to)1121-1133
Number of pages13
JournalInternational Journal of Radiation Oncology Biology Physics
Volume54
Issue number4
DOIs
Publication statusPublished - 2002 Nov 15

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Keywords

  • Arteriovenous malformation
  • CT angiography
  • Dynamic CT
  • Intra-arterial infusion
  • Radiosurgery

ASJC Scopus subject areas

  • Radiation
  • Oncology
  • Radiology Nuclear Medicine and imaging
  • Cancer Research

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