Optimal Scanning protocol of multislice CT virtual intravascular endoscopy in pre-aortic stent grafting: in vitro phantom study
Objective: To investigate the optimal scanning protocol for multislice computed tomography angiography (MSCT) in pre-aortic stent grafting observed with virtual intravascular endoscopy (VIE).Materials and Methods: The study was performed on a human abdominal aortic phantom which was housed in a pers...
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| Format: | Journal Article |
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Elsevier
2006
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| Online Access: | http://hdl.handle.net/20.500.11937/17687 |
| _version_ | 1848749530358480896 |
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| author | Sun, Zhonghua Ferris, C. |
| author_facet | Sun, Zhonghua Ferris, C. |
| author_sort | Sun, Zhonghua |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Objective: To investigate the optimal scanning protocol for multislice computed tomography angiography (MSCT) in pre-aortic stent grafting observed with virtual intravascular endoscopy (VIE).Materials and Methods: The study was performed on a human abdominal aortic phantom which was housed in a perspex container, filled with contrast medium having CT attenuation similar to that used in the patient?s abdominal CT scan. A series of scans were performed on a four-slice multislice CT scanner with the scanning protocols as follows: section thickness of 1.3mm, 3.2mm and 6.5mm, pitch value of 0.875, 1.25 and 1.75 with reconstruction intervals of 50% overlap. The degree of stair-step artifacts was measured at three different locations, superior mesenteric artery (SMA), renal ostium and the normal abdominal aorta. Standard deviation (SD) of the signal intensity measured on surface shaded images was used to determine the image quality. Radiation dose was also recorded in each scanning protocol.Results: The VIE images showed that image quality was not dependant on pitch and section thickness in the visualization of renal ostium and SMA, whereas it was dependant on these two factors at the level of the normal aorta (p<0.05). It was noticed that when section thickness reached 6.5mm the SMA and renal ostia became distorted. Radiation dose measured in 1.3 mm protocols was significantly higher that those measured in other section thicknesses (p<0.05).Conclusion: The scanning protocol of section thickness 3.2mm, pitch 1.25 with a reconstruction interval of 1.6 mm was recommended as it allows optimal visualization of VIE images of aortic ostia, generation of fewer artifacts and less radiation dose. |
| first_indexed | 2025-11-14T07:22:24Z |
| format | Journal Article |
| id | curtin-20.500.11937-17687 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:22:24Z |
| publishDate | 2006 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-176872018-10-01T04:18:40Z Optimal Scanning protocol of multislice CT virtual intravascular endoscopy in pre-aortic stent grafting: in vitro phantom study Sun, Zhonghua Ferris, C. artifact image quality Computed tomography stent graft virtual endoscopy Objective: To investigate the optimal scanning protocol for multislice computed tomography angiography (MSCT) in pre-aortic stent grafting observed with virtual intravascular endoscopy (VIE).Materials and Methods: The study was performed on a human abdominal aortic phantom which was housed in a perspex container, filled with contrast medium having CT attenuation similar to that used in the patient?s abdominal CT scan. A series of scans were performed on a four-slice multislice CT scanner with the scanning protocols as follows: section thickness of 1.3mm, 3.2mm and 6.5mm, pitch value of 0.875, 1.25 and 1.75 with reconstruction intervals of 50% overlap. The degree of stair-step artifacts was measured at three different locations, superior mesenteric artery (SMA), renal ostium and the normal abdominal aorta. Standard deviation (SD) of the signal intensity measured on surface shaded images was used to determine the image quality. Radiation dose was also recorded in each scanning protocol.Results: The VIE images showed that image quality was not dependant on pitch and section thickness in the visualization of renal ostium and SMA, whereas it was dependant on these two factors at the level of the normal aorta (p<0.05). It was noticed that when section thickness reached 6.5mm the SMA and renal ostia became distorted. Radiation dose measured in 1.3 mm protocols was significantly higher that those measured in other section thicknesses (p<0.05).Conclusion: The scanning protocol of section thickness 3.2mm, pitch 1.25 with a reconstruction interval of 1.6 mm was recommended as it allows optimal visualization of VIE images of aortic ostia, generation of fewer artifacts and less radiation dose. 2006 Journal Article http://hdl.handle.net/20.500.11937/17687 10.1016/j.ejrad.2005.11.034 Elsevier fulltext |
| spellingShingle | artifact image quality Computed tomography stent graft virtual endoscopy Sun, Zhonghua Ferris, C. Optimal Scanning protocol of multislice CT virtual intravascular endoscopy in pre-aortic stent grafting: in vitro phantom study |
| title | Optimal Scanning protocol of multislice CT virtual intravascular endoscopy in pre-aortic stent grafting: in vitro phantom study |
| title_full | Optimal Scanning protocol of multislice CT virtual intravascular endoscopy in pre-aortic stent grafting: in vitro phantom study |
| title_fullStr | Optimal Scanning protocol of multislice CT virtual intravascular endoscopy in pre-aortic stent grafting: in vitro phantom study |
| title_full_unstemmed | Optimal Scanning protocol of multislice CT virtual intravascular endoscopy in pre-aortic stent grafting: in vitro phantom study |
| title_short | Optimal Scanning protocol of multislice CT virtual intravascular endoscopy in pre-aortic stent grafting: in vitro phantom study |
| title_sort | optimal scanning protocol of multislice ct virtual intravascular endoscopy in pre-aortic stent grafting: in vitro phantom study |
| topic | artifact image quality Computed tomography stent graft virtual endoscopy |
| url | http://hdl.handle.net/20.500.11937/17687 |