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Year : 2005  |  Volume : 53  |  Issue : 3  |  Page : 287--289

Three-dimensional digital subtraction angiography vs two-dimensional digital subtraction angiography for detection of ruptured intracranial aneurysms: A study of 86 aneurysms

1 Departments of Neurosurgery, Kitasato University, School of Medicine, Kanagawa, Japan
2 Departments of Emergency and Critical Care Medicine, Kitasato University, School of Medicine, Kanagawa, Japan

Correspondence Address:
Masatou Kawashima
Kitasato University, School of Medicine, Kanagawa
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/0028-3886.16925

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Aims : Three-dimensional reconstruction of intracranial vessels is of interest for evaluation of aneurysms. This study determined diagnostic difference of three-dimensional digital subtraction angiography (3D-DSA, volume-rendering image) versus 2D-DSA for evaluating ruptured intracranial aneurysms, particularly focusing on the size of aneurysms as depicted in both images. Settings and Design : Sixty-nine patients underwent 3D-DSA and 2D-DSA. The relative size of an aneurysm, which is the ratio of the maximal diameter of an aneurysm to the diameter of a major vessel, was compared between imaging techniques. In addition, relative sizes of smaller aneurysms (<5 mm) were compared with those of larger aneurysms (>10 mm). Statistical analysis used : For comparison of aneurysm size and location of aneurysm, statistical analysis was performed with the Yates chi square test; statistical significance was set with a P value of less than 0.05. Results: Sixty-three (73.3%) of the 86 total aneurysms were bigger when measured with 3D-DSA versus 2D-DSA. When measured with 3D-DSA, 28 (84.8%) of the 33 smaller aneurysms were bigger, and 50% of the larger aneurysms were bigger versus measurements of 2D-DSA images ( P <0.05). In ACA and ICA territories, which tended to have smaller mean aneurysmal size, relative size of the aneurysm was bigger when measured with 3D-DSA (81.5% and 81.0%, respectively). In MCA, where the mean aneurysmal size was the largest, relative size of aneurysms was bigger when measured with 3D-DSA in 15 cases (53.6%, P <0.05). In the posterior circulation, aneurysm size was similar between 3D-DSA and 2D-DSA measurements. Conclusions : 3D-DSA, especially volume-rendering images, tends to depict ruptured intracranial aneurysms bigger than 2D-DSA. This is particularly true with cerebral aneurysms that are <5 mm in size and are located in the anterior circulation, especially ICA and ACA territories.


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Online since 20th March '04
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