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KMID : 1155820100050020085
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Neurointervention
2010 Volume.5 No. 2 p.85 ~ p.90
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Imaging of Distal Dural Ring Plane and Paraclinoid Internal Carotid Artery Aneurysms with 3D Rotational Angiography
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Lee Dong-Woo
Kim Tae-Hyung
Kim Bum-Soo
Ihn Yon-Kwon
Won Yoo-Dong
Chung Joon-Ho
Shin Yong-Sam
Lee Kwan-Sung
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Abstract
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Purpose: The distal dural ring (DDR) plane separates the intradural from extradural paraclinoid internal carotid artery (ICA) aneurysm. The purpose of this study was to evaluate the feasibility of the localization of the DDR plane drawn by the bony landmarks in patients with paraclinoid ICA aneurysms at 3D rotational angiography (3DRA).
Materials and Methods : 13 consecutive patients who underwent a 3DRA for the evaluation of 16 paraclinoid ICA aneurysms were reviewed retrospectively. On a dedicated workstation, multiplanar reconstruction (MPR) image along the virtual plane of DDR was reconstructed from the mask run image of 3DRA. Three bony landmarks were used to locate virtual plane of DDR: tuberculum sellae, inferior root of anterior clinoid process and supero-medial aspect of optic strut. The MPR image was fused with 3D volume-rendered reconstruction image. Medial and posterior inclination angle of virtual plane of DDR was measured. The location of the paraclinoid ICA aneurysm was categorized into indradural, transdural, and extradural.
Results: In all cases, the DDR plane was identified and the relationship between the DDR plane and the paraclinoid ICA aneurysm was successfully determined on fusion image of 3DRA mask and contrast runs by dual volume visualization. The aneurysm locations determined with 3DRA were 8 intradural, 6 transdural and 2 extradural. The medial and posterior inclination angles of DDR plane ranged at 8 to 43??(mean 17.4??), and -2 to 20??(mean 6.4??), respectively.
Conclusion: Localization of the paraclinoid ICA aneurysm in relation to the virtual plane of DDR is feasible
with 3DRA and dual volume visualization.
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KEYWORD
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Distal Dural Ring, Paraclinoid Aneurysm, 3D Rotational Angiography
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