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AJNR - American Journal of Neuroradiology

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3D Digital Subtraction Angiography of Intracranial Aneurysms: Comparison of Flat Panel Detector with Conventional Image Intensifier TV System Using a Vascular Phantom

S. Kakeda^a, Y. Korogi^a, N. Ohnari^a, Y. Hatakeyama^a, J. Moriya^a, N. Oda^a, K. Nishino^b and W. Miyamoto^b

^a Department of Radiology, University of Occupational and Environmental Health School of Medicine, Kitakyushu, Japan
^b Medical Systems Division, Shimadzu Corporation, Kyoto, Japan

View larger version (78K): [in this window] [in a new window]   Fig 1. Photograph (A) and schematic drawing (B) of the anthropomorphic vascular phantom used in this study. The phantom was designed to simulate the intracranial arteries with a total of 32 aneurysms. Of 32 aneurysms, 15 had an aneurysmal bleb with diameter of 2 mm.

View larger version (54K): [in this window] [in a new window]   Fig 2. 3D DSA from the superior and right posterior oblique view at 300 mg I/mL obtained with FPD system (A) and with I.I.-TV system (B). 3D DSA with FPD system shows mild stenosis at the M1 segment of the middle cerebral artery, whereas severe stenosis is observed on 3D DSA with I.I.-TV system (arrowheads). The pseudostenosis artifact caused the minor distortion of aneurysm on 3D DSA with FPD system, whereas the severe distortion of aneurysm on that with I.I.-TV system (arrows).

View larger version (66K): [in this window] [in a new window]   Fig 3. Anteroposterior 3D DSA obtained with I.I.-TV system at 300 (A) and at 150 mg I/mL (B) demonstrated that the pseudostenosis artifacts are more severe at 300 than at 150 mg I/mL (arrows).

View larger version (63K): [in this window] [in a new window]   Fig 4. Anteroposterior 3D DSA (300 mg I/mL) obtained with the FPD system (A) and with the I.I.-TV system (B) show many aneurysms. For depiction of aneurysms such as the aneurysm neck and the shape of the aneurysm, the 3D DSA with FPD system is superior to that with the I.I.-TV system.

View larger version (54K): [in this window] [in a new window]   Fig 5. 3D DSA (300 mg I/mL) from the right posterior oblique view obtained with FPD system (A) and with I.I.-TV system (B) show many aneurysmal blebs (arrows). For depiction of aneurysmal blebs, the 3D DSA with FPD system is superior to that with the I.I.-TV system.