Document Detail

Dose and image quality of electron-beam CT compared with spiral CT.
MedLine Citation:
PMID:  10353034     Owner:  NLM     Status:  MEDLINE    
RATIONALE AND OBJECTIVES: To examine dose and image quality of electron-beam CT (EBCT) with continuous volume scan versus spiral CT. METHODS: An EBCT scanner was compared with a spiral CT (SCT) scanner. Three phantoms were used to measure low-contrast resolution, high-contrast resolution, slice width, and dose. RESULTS: The EBCT scans showed 30% lower high-contrast resolution for most settings. The dose was comparable to that of spiral CT with 3 mm collimation and 76%/106% higher with EBCT for 1.5 mm/6 mm collimation. Low-contrast resolution was comparable to that of spiral CT using 3 mm collimation, slightly worse for 1.5 mm, and bad for 6 mm EBCT collimation (four times higher dose to reach comparable contrast-to-noise ratio). CONCLUSIONS: Significant restrictions were found using EBCT with continuous volume scan. The authors found that 3 mm collimation can yield acceptable high-contrast resolution and good low-contrast resolution compared with spiral CT. The use of 6 mm or 1.5 mm collimation needs to be restricted to selected cases.
G Weisser; K J Lehmann; R Scheck; E Coppenrath; M Georgi
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Investigative radiology     Volume:  34     ISSN:  0020-9996     ISO Abbreviation:  Invest Radiol     Publication Date:  1999 Jun 
Date Detail:
Created Date:  1999-07-26     Completed Date:  1999-07-26     Revised Date:  2009-11-11    
Medline Journal Info:
Nlm Unique ID:  0045377     Medline TA:  Invest Radiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  415-20     Citation Subset:  IM    
Department of Clinical Radiology, University Hospital Mannheim, Faculty of Clinical Medicine Mannheim, University of Heidelberg Medical School, Germany.
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MeSH Terms
Evaluation Studies as Topic
Image Processing, Computer-Assisted
Phantoms, Imaging
Radiation Dosage
Tomography, X-Ray Computed / instrumentation,  methods*

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