Digital radiography: The balance between image quality and required radiation dose

Uffmann, Martin; Schaefer-Prokop, Cornelia

doi:10.1016/j.ejrad.2009.05.060

Cited by 189 publications

(112 citation statements)

References 21 publications

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“…The importance of regularly investigating optimization strategies and adhering to the best radiographic practice is highlighted by advancements in current dose reduction literature and the steady increase in public concern regarding the biological effects of low-level ionizing radiation [3]. Uffmann and SchaeferProkop [4] maintain that throughout the transition from film screen to digital technology in the clinical environment many of the examination parameters such as tube current (mA), tube voltage (kVp), and filtration were translated directly from film screen exposures to computed radiography and direct digital radiography (dDR) without appropriate radiographic adjustment [4]. A review of the available optimization techniques is required so that the evidence base for optimized radiographic practice is increased and ongoing dose reductions with digital acquisition devices are achieved [5].…”

Section: Introductionmentioning

confidence: 99%

Reducing Dose for Digital Cranial Radiography: The Increased Source to the Image-receptor Distance Approach

Joyce

McEntee

Brennan

et al. 2013

Journal of Medical Imaging and Radiation Sciences

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This investigation proposes that an increased source to the imagereceptor distance (SID) technique can be used to optimize occipital frontal and lateral cranial radiographs acquired with direct digital radiography. Although cranial radiography is not performed on a routine basis, it should nonetheless be optimized to keep the dose to the patient as low as reasonably achievable, particularly because it can form part of the facial bone and sinus series. Dose measurements were acquired at various SIDs, and image quality was assessed using visual grading analysis. Statistically significant reductions in the effective dose between 19.2% and 23.9% were obtained when the SID was increased from the standard 100 to 150 cm (P .05), and visual grading analysis scores indicate that image quality remained diagnostically acceptable for both projections. This investigation concludes that increasing the SID effectively optimizes occipital frontal and lateral skull radiographs. Radiology departments must be advised of the benefits of this technique with the goal of introducing an updated reference SID of 150 cm into clinical practice.R ESUM E Cette etude pose comme hypoth ese que la technique de l'augmentation de la distance entre la source et le r ecepteur d'image (SID) peut etre utilis ee pour optimiser les radiographies occipitales frontales (OF10 ) et crâniales lat erales acquises par radiographie num erique directe. Bien que la radiographie crâniale ne se pratique pas couramment, elle doit quand mêmeêtre optimis ee pour garder la dose pour le patient la plus basse qui soir raisonnablement possible d'atteindre, notamment parce qu'elle peut s'inscrire dans une s erie de la structure osseuse faciale et des sinus. Des mesures de dose ont et e prises a diff erentes SID et la qualit e de l'image a et e evalu ee au moyen de l'analyse de classement visuel (VGA). Des r eductions statistiquement significatives de la dose variant entre 19,2 % et 23,9 % ont et e obtenues lorsque la SID a et e port ee de la distance standard de 100 cm a 150 cm (p 0,05) et les notes VGA indiquent que la qualit e diagnostique de l'image reste acceptable pour les deux projections. Cette etude conclut que l'augmentation de la SID permet effectivement d'optimiser les radiographies occipitales frontales et crâniales lat erales. Les services de radiographie doiventêtre inform es des avantages de cette technique dans le but d'adopter une mise a jour a 150 cm de la SID de r ef erence dans la pratique clinique.

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Section: Introductionmentioning

confidence: 99%

Reducing Dose for Digital Cranial Radiography: The Increased Source to the Image-receptor Distance Approach

Joyce

McEntee

Brennan

et al. 2013

Journal of Medical Imaging and Radiation Sciences

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“…Limiting the irradiated field to the area of diagnostic interest (ADI) is essential, since the dose increases with irradiated area [2]. Digital image processing programs can be used in daily practice to mask an unnecessarily large collimation so that you can no longer see whether the image is optimally collimated or electronically edited [3]. This could reduce the motivation to carry out proper collimation.…”

mentioning

confidence: 99%

Lumbar spine radiography — poor collimation practices after implementation of digital technology

Zetterberg¹,

Espeland²

2011

BJR

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Objectives: The transition from analogue to digital radiography may have reduced the motivation to perform proper collimation, as digital techniques have made it possible to mask areas irradiated outside the area of diagnostic interest (ADI). We examined the hypothesis that collimation practices have deteriorated since digitalisation. Methods: After defining the ADI, we compared the proportion of the irradiated field outside the ADI in 86 digital and 86 analogue frontal lumbar spine radiographs using the Mann-Whitney test. 50 digital images and 50 analogue images were from a Norwegian hospital and the remainder from a Danish hospital. Consecutive digital images were compared with analogue images (from the hospitals' archives) produced in the 4 years prior to digitalisation. Both hospitals' standard radiographic procedures remained unchanged during the study. For digital images, the irradiated field was assessed using non-masked raw-data images. Results: The proportion of the irradiated field outside the ADI was larger in digital than in analogue images (mean 61.7% vs 42.4%, p,0.001), and also in a subsample of 39 image pairs that could be matched for patient age (p,0.001). The mean total field size was 46% larger in digital than in analogue images (791 cm 2 vs 541 cm 2 ). Conclusion: Following the implementation of digital radiography, considerably larger areas were irradiated. This causes unnecessarily high radiation doses to patients.

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“…There are many ways to reduce patient dose (Willis 2009), however, optimization cannot be achieved without simultaneous consideration of image quality and the clinical purpose of the examination. The balance of these competing factors is discussed by Uffmann and Schaefer-Prokop (2009). It makes little sense to reduce the radiation dose if the resulting image is so noisy that important clinical features are no longer discernible.…”

Section: Radiation Dose Optimization In Pediatric Chest Radiographymentioning

confidence: 98%

Advances in Chest Radiography Techniques: CR, DR, Tomosynthesis, and Radiation Dose Optimization

Willis

Don

2013

Pediatric Chest Imaging

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Digital radiography: The balance between image quality and required radiation dose

Cited by 189 publications

References 21 publications

Reducing Dose for Digital Cranial Radiography: The Increased Source to the Image-receptor Distance Approach

Reducing Dose for Digital Cranial Radiography: The Increased Source to the Image-receptor Distance Approach

Lumbar spine radiography — poor collimation practices after implementation of digital technology

Advances in Chest Radiography Techniques: CR, DR, Tomosynthesis, and Radiation Dose Optimization

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