Document Detail


Total digital radiology department: spatial resolution requirements.
MedLine Citation:
PMID:  3492124     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The minimum spatial resolution required for a total digital radiology department has yet to be defined. A pilot study designed to provide this information was performed. Abnormal and normal radiographic images of children were digitized and redisplayed on film at spatial resolutions of 5.0, 2.5, 1.25, and 0.625 lp/mm. These resolutions are comparable to a digital display of a 14 X 14 in. chest image having pixel elements of 4096 X 4096, 2048 X 2048, 1024 X 1024, and 512 X 512, respectively. Contrast resolution was maintained at 12 bits or 4096 gray levels. The three phases of data acquisition were (1) the standard analysis of receiver operating characteristics, (2) a checklist evaluation of the "seeability" of important structures, and (3) a comparison of all resolutions and a discernment of usability. Fifteen radiologists participated in the study. On the basis of the pediatric cases used, the results showed that the needed spatial resolution for a total digital radiology department may be around 2.5 lp/mm (2048 X 2048). Checklist data on seeability of structures and comparisons of all resolutions give information on specific changes that are occurring as the resolution is decreased, and, when included with the receiver-operating-characteristic data, they become a major component in developing a resolution standard. The finding that 2.5 lp/mm is the required spatial resolution makes construction of a total digital radiology department possible with present state-of-the-art technology.
Authors:
G W Seeley; H D Fisher; M O Stempski; M Borgstrom; J Bjelland; M P Capp
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  AJR. American journal of roentgenology     Volume:  148     ISSN:  0361-803X     ISO Abbreviation:  AJR Am J Roentgenol     Publication Date:  1987 Feb 
Date Detail:
Created Date:  1987-02-19     Completed Date:  1987-02-19     Revised Date:  2008-02-15    
Medline Journal Info:
Nlm Unique ID:  7708173     Medline TA:  AJR Am J Roentgenol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  421-6     Citation Subset:  AIM; IM    
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MeSH Terms
Descriptor/Qualifier:
Child
Hospital Departments / standards*
Humans
Pilot Projects
Radiographic Image Enhancement / standards*
Radiology Department, Hospital / standards*
Technology, Radiologic

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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