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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2018.1
- 수록면
- 1 - 11 (11page)
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Background: The purpose of this study was to qualitatively and quantitatively evaluate the effects of a metal artifact reduction for orthopedic implants (O-MAR) for brain computed tomographic angiography (CTA) in patients with aneurysm clips and coils. Methods: The study included 36 consecutive patients with 47 intracranial metallic implants (42 aneurysm clips, 5 coils) who underwent brain CTA. The computed tomographic images with and without the O-MAR were independently reviewed both quantitatively and qualitatively by two reviewers. For quantitative analysis, image noises near the metallic implants of non-O-MAR and O-MAR images were compared. For qualitative analysis, image quality improvement and the presence of new streak artifacts were assessed. Results: Image noise was significantly reduced near metallic implants (P < 0.01). Improvement of implant-induced streak artifacts was observed in eight objects (17.0%). However, streak artifacts were aggravated in 11 objects (23.4%), and adjacent vessel depiction was worsened in eight objects (17.0%). In addition, new O-MAR-related streak artifacts were observed in 32 objects (68.1%). New streak artifacts were more prevalent in cases with overlapping metallic implants on the same axial plane than in those without (P = 0.018). Qualitative assessment revealed that the overall image quality was not significantly improved in O-MAR images. Conclusion: In conclusion, the use of the O-MAR in patients with metallic implants significantly reduces image noise. However, the degree of the streak artifacts and surrounding vessel depiction were not significantly improved on O-MAR images.
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참고문헌 (24)
참고문헌 신청
Kato Y / 2002 / Multi-slice 3D-CTA - an improvement over single slice helical CTA for cerebral aneurysms / Acta Neurochir (Wien) 144(7):715~722
Wintermark M / 2003 / Multislice computerized tomography angiography in the evaluation of intracranial aneurysms: a comparison with intraarterial digital subtraction angiography / J Neurosurg 98(4):828~836
Silverman PM / 1986 / Computed tomographic evaluation of surgical clip artifact: tissue phantom and experimental animal assessment / Comput Radiol 10(1):37~40
Barrett JF / 2004 / Artifacts in CT: recognition and avoidance / Radiographics 24(6):1679~1691
De Man B / 1999 / Metal streak artifacts in X-ray computed tomography: a simulation study / IEEE Trans Nucl Sci 46(3):691~696
Wintermark M / 2003 / Multislice computerized tomography angiography in the evaluation of intracranial aneurysms: a comparison with intraarterial digital subtraction angiography / J Neurosurg 98(4):828~836
Silverman PM / 1986 / Computed tomographic evaluation of surgical clip artifact: tissue phantom and experimental animal assessment / Comput Radiol 10(1):37~40
Barrett JF / 2004 / Artifacts in CT: recognition and avoidance / Radiographics 24(6):1679~1691
De Man B / 1999 / Metal streak artifacts in X-ray computed tomography: a simulation study / IEEE Trans Nucl Sci 46(3):691~696
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