Optimisation of radiological protocols for chest imaging using computed radiography and flat-panel X-ray detectors.
Radiol Med
; 118(4): 540-54, 2013 Jun.
Article
em En
| MEDLINE
| ID: mdl-23090253
ABSTRACT
PURPOSE:
Digital radiography technology has replaced conventional screen-film systems in many hospitals. Despite the different characteristics of new detector materials, frequently, the same radiological protocols previously optimised for screen film are still used with digital equipment without any critical review. This study addressed optimisation of exposure settings for chest examinations with digital systems, considering both image quality and patient dose. MATERIALS ANDMETHODS:
Images acquired with direct digital radiography equipment and a computed radiography system were analysed with specially developed commercial software with a four-alternative forced-choicemethod:
the most promising protocols were then scored by two senior radiologists.RESULTS:
Digital technology offers a wide dynamic range and the ability to postprocess images, allowing use of lower tube potentials in chest examinations. The computed radiography system showed both better image quality and lower dose at lower energies (85 kVp and 95 kVp) than those currently used (125 kVp). Direct digital radiography equipment confirmed both its superior image quality and lower dose requirements compared with the storage phosphor plate system.CONCLUSIONS:
Generally, lowering tube potentials in chest examinations seems to allow better image quality/effective dose ratio when using digital equipment.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Radiografia Torácica
/
Intensificação de Imagem Radiográfica
/
Tomografia Computadorizada por Raios X
/
Protocolos Clínicos
Tipo de estudo:
Guideline
Limite:
Humans
Idioma:
En
Ano de publicação:
2013
Tipo de documento:
Article