| Properties of the prototype 256-row (cone beam) CT scanner. | |
| | |
MedLine Citation:
|
PMID: 16568264 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
We evaluated Feldkamp artifacts, which are specific to cone-beam computed tomography (CT), in phantom and clinical studies using the 256-multidetector-row CT (256MDCT), and compared the reconstruction accuracy of axial and helical scans. Image noise, slice sensitivity profile (SSP) and artifacts with the 256MDCT were evaluated using a phantom, and the results were compared to those of a 64MDCT. We also examined chest and abdomen scans produced with the 256MDCT in volunteers. For the axial scan, Feldkamp artifacts were visualized as high-frequency streak-like artifacts that are oriented horizontally at the edge of the scan region in the phantom study. Similar results were obtained with the volunteers in soft-tissue regions near either bony structures or air pockets. Feldkamp artifacts with the 256MDCT can lead to misdiagnosis if not correctly identified and minimized via helical scanning. Image noise was less for axial than helical scans, while SSP was better with helical than axial scans. Feldkamp artifacts observed in the 256MDCT images, however, did not generally affect the interpretation of images. The 256MDCT promises more accurate diagnosis, and will provide volumetric cine images of wider cranio-caudal coverage, enabling new applications of CT. |
| | |
Authors:
|
Shinichiro Mori; Masahiro Endo; Takayuki Obata; Takanori Tsunoo; Kandatsu Susumu; Shuji Tanada |
Related Documents
:
|
8187804 - Brittleness of gallstones to lithotripsy: effect of physicochemical and ultrastructural... 8282864 - Postcontrast ct in the diagnosis and assessment of response to thrombolysis in massive ... 9561864 - A comparison of spiral and conventional computerized tomography methods in diagnosing v... 9057524 - Helical ct angiography in gastrointestinal bleeding of obscure origin. 581564 - Lymphosarcoma in an ectopic pelvic spleen. 11089474 - Ct diagnosis of malpositioned chest tubes. |
Publication Detail:
|
Type: Comparative Study; Evaluation Studies; Journal Article Date: 2006-03-28 |
Journal Detail:
|
Title: European radiology Volume: 16 ISSN: 0938-7994 ISO Abbreviation: Eur Radiol Publication Date: 2006 Sep |
Date Detail:
|
Created Date: 2006-08-09 Completed Date: 2007-04-06 Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 9114774 Medline TA: Eur Radiol Country: Germany |
Other Details:
|
Languages: eng Pagination: 2100-8 Citation Subset: IM |
Affiliation:
|
Department of Medical Physics, National Institute of Radiological Sciences, Chiba, 263-8555, Japan. shinshin@nirs.go.jp |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Adult Artifacts Humans Male Middle Aged Phantoms, Imaging* Radiography, Abdominal Radiography, Thoracic Tomography, X-Ray Computed / instrumentation*, methods* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Isolation of major histocompatibility complex Class I genes from the tammar wallaby (Macropus eugeni...
Next Document: Multidetector CT of the kidney.