title: Pulsatility imaging of saccular aneurysm model by 64-slice CT with dynamic multiscan technique.
abstract: 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.
authors.affiliation: Department of Radiology, Northwestern University, 676 North Saint Clair Street, Suite 800, Chicago, Il 60611, USA. v-yaghmai@northwestern.edu
authors.forename: Vahid
authors.initials: V
authors.lastname: Yaghmai
authors.forename: Mehdi
authors.initials: M
authors.lastname: Rohany
authors.forename: Ali
authors.initials: A
authors.lastname: Shaibani
authors.forename: Martin
authors.initials: M
authors.lastname: Huber
authors.forename: Haytham
authors.initials: H
authors.lastname: Soud
authors.forename: Eric J
authors.initials: EJ
authors.lastname: Russell
authors.forename: Matthew T
authors.initials: MT
authors.lastname: Walker
mesh_terms: 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*
chemical_list: D003287:Contrast Media; D007472:Iohexol