Influence of developer exhaustion on accuracy of quantitative digital subtraction radiography: an in vitro study.
Oral Surg Oral Med Oral Pathol Oral Radiol Endod
; 90(2): 233-9, 2000 Aug.
Article
em En
| MEDLINE
| ID: mdl-10936844
ABSTRACT
OBJECTIVE:
The aim of the study was to evaluate the influence of developer exhaustion on accuracy of quantitative digital subtraction radiography. STUDYDESIGN:
Six objects, each incorporating a section of dry human mandible, were radiographed with 4 exposure times. Baseline films were processed in fresh solutions, whereas follow-up films were processed in fresh and in increasingly exhausted solutions (ie, 1, 2, and 3 weeks old). Bone loss and bone gain were computer simulated in 17 regions of interest on baseline radiographs. Area and volume of changes in mineralization were measured in subtracted images, obtained by subtraction of baseline from their corresponding follow-up radiographs. Friedman's 2-way analysis of variance by ranks and Wilcoxon signed-rank test were used for statistical analysis.RESULTS:
Because of exhausted developer, bone loss was relatively underestimated from 6.6% to 16.5% (P <.05), whereas bone gain was relatively overestimated from 9.7% to 16.7% (P <.05).CONCLUSIONS:
This in vitro study demonstrates that films for quantitative digital subtraction radiography should be processed in fresh developer or error might be introduced.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Soluções
/
Perda do Osso Alveolar
/
Técnica de Subtração
/
Tecnologia Radiológica
/
Radiografia Dentária Digital
Tipo de estudo:
Diagnostic_studies
Limite:
Humans
Idioma:
En
Revista:
Oral Surg Oral Med Oral Pathol Oral Radiol Endod
Ano de publicação:
2000
Tipo de documento:
Article