Radiation dose and image quality of X-ray volume imaging systems: cone-beam computed tomography, digital subtraction angiography and digital fluoroscopy.
Eur Radiol
; 23(6): 1582-93, 2013 Jun.
Article
em En
| MEDLINE
| ID: mdl-23250112
ABSTRACT
OBJECTIVE:
Radiation dose and image quality estimation of three X-ray volume imaging (XVI) systems.METHODS:
A total of 126 patients were examined using three XVI systems (groups 1-3) and their data were retrospectively analysed from 2007 to 2012. Each group consisted of 42 patients and each patient was examined using cone-beam computed tomography (CBCT), digital subtraction angiography (DSA) and digital fluoroscopy (DF). Dose parameters such as dose-area product (DAP), skin entry dose (SED) and image quality parameters such as Hounsfield unit (HU), noise, signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) were estimated and compared using appropriate statistical tests.RESULTS:
Mean DAP and SED were lower in recent XVI than its previous counterparts in CBCT, DSA and DF. HU of all measured locations was non-significant between the groups except the hepatic artery. Noise showed significant difference among groups (P < 0.05). Regarding CNR and SNR, the recent XVI showed a higher and significant difference compared to its previous versions. Qualitatively, CBCT showed significance between versions unlike the DSA and DF which showed non-significance.CONCLUSION:
A reduction of radiation dose was obtained for the recent-generation XVI system in CBCT, DSA and DF. Image noise was significantly lower; SNR and CNR were higher than in previous versions. The technological advancements and the reduction in the number of frames led to a significant dose reduction and improved image quality with the recent-generation XVI system. KEY POINTS ⢠X-ray volume imaging (XVI) systems are increasingly used for interventional radiological procedures. ⢠More modern XVI systems use lower radiation doses compared with earlier counterparts. ⢠Furthermore more modern XVI systems provide higher image quality. ⢠Technological advances reduce radiation dose and improve image quality.
Texto completo:
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Base de dados:
MEDLINE
Assunto principal:
Fluoroscopia
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Interpretação de Imagem Radiográfica Assistida por Computador
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Angiografia Digital
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Tomografia Computadorizada de Feixe Cônico
Tipo de estudo:
Observational_studies
Limite:
Adult
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Aged
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Aged80
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Female
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Humans
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Male
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Middle aged
Idioma:
En
Ano de publicação:
2013
Tipo de documento:
Article