Pulsatility imaging of saccular aneurysm model by 64-slice CT with dynamic multiscan technique.
The feasibility of imaging pulsatility in an aneurysm model with the high-resolution dynamic multiscan technique of 64-slice computed tomography (CT) was studied. A pulsatile aneurysm phantom was constructed and imaged with dynamic multiscan technique. The aneurysm model was filled with iodinated contrast material (250 Hounsfield Units) and was scanned with use of a gantry rotation time of 0.33 seconds, slice thickness of 1.2 mm, effective coverage of 24 mm, and total imaging time of 4 seconds. Images were reconstructed at 50-msec intervals. The visualization of wall motion was qualitatively evaluated by direct comparison of four-dimensional images versus phantom motion. Pulsatility imaging without perceptible artifact or need for cardiac gating was achieved with the use of this technique.
Yaghmai
Vahid
V
Department of Radiology, Northwestern University, 676 North Saint Clair Street, Suite 800, Chicago, Il 60611, USA. v-yaghmai@northwestern.edu
Rohany
Mehdi
M
Shaibani
Ali
A
Huber
Martin
M
Soud
Haytham
H
Russell
Eric J
EJ
Walker
Matthew T
MT
D016477:Artifacts; D003287:Contrast Media; D004562:Electrocardiography; D005240:Feasibility Studies; D006801:Humans; D002532:Intracranial Aneurysm / Q000000981:diagnostic imaging* / Q000503:physiopathology; D007472:Iohexol; D008955:Models, Cardiovascular; D019047:Phantoms, Imaging; D011673:Pulsatile Flow; D011857:Radiographic Image Interpretation, Computer-Assisted; D013997:Time Factors; D036542:Tomography, Spiral Computed / Q000295:instrumentation*
D003287:Contrast Media; D007472:Iohexol