Digital Radiography of the Skeleton Using a Large-Area Detector Based on Amorphous Silicon Technology: Image Quality and Potential for Dose Reduction in Comparison with Screen-Film Radiography

Völk, Markus; Strotzer, M.; Holzknecht, N.; Manke, C.; Lenhart, Markus; Gmeinwieser, J.; Link, J.; Reiser, Maximilian; Feuerbach, Stefan

doi:10.1053/crad.2000.0493

Cited by 36 publications

(19 citation statements)

References 16 publications

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“…There have been clinical studies of FPD-DR concerning the bone structure and chest [11,12,13,14,15]. Comparison between FPD images (size 15×15 cm 2 ; speed 400, 800, 1600) and S/F images (speed 400) in skeletal radiography of 120 patients were investigated [11].…”

Section: Discussionmentioning

confidence: 99%

“…Technical and basic evaluations of the digital Bucky system on which a flat-panel detector is mounted have been made [2,3,4,5,6,7,8], and the results of evaluations using a phantom mimicking the human bone have been reported [9,10], but there have been few reports of clinical comparison. Although there have been reports on DR using a small flat-panel in the skeletal region [11] and using a large area flat-panel detector in the chest [12,13,14], there have been only one report for clinical skeletal system with a large-area flat-panel detector [15] and no report for abdominal or pelvic region with it.…”

Section: Introductionmentioning

confidence: 99%

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Clinical evaluation of digital radiography based on a large-area cesium iodide-amorphous silicon flat-panel detector compared with screen-film radiography for skeletal system and abdomen

et al. 2002

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The aim of this clinical study was to compare the image quality of digital radiography using the new digital Bucky system based on a flat-panel detector with that of a conventional screen-film system for the skeletal structure and the abdomen. Fifty patients were examined using digital radiography with a flat-panel detector and screen-film systems, 25 for the skeletal structures and 25 for the abdomen. Six radiologists judged each paired image acquired under the same exposure parameters concerning three observation items for the bone and six items for the abdomen. Digital radiographic images for the bone were evaluated to be similar to screen-film images at the mean of 42.2%, to be superior at 50.2%, and to be inferior at 7.6%. Digital radiographic images for the abdomen were judged to be similar to screen-film images at the mean of 43.4%, superior at 52.4%, and inferior at 4.2%; thus, digital radiographic images were estimated to be either similar as or superior to screen-film images at over 92% for the bone and abdomen. On the statistical analysis, digital radiographic images were also judged to be preferred significantly in the most items for the bone and abdomen. In conclusion, the image quality of digital radiography with a flat-panel detector was superior to that of a screen-film system under the same exposure parameters, suggesting that dose reduction is possible with digital radiography.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Clinical evaluation of digital radiography based on a large-area cesium iodide-amorphous silicon flat-panel detector compared with screen-film radiography for skeletal system and abdomen

et al. 2002

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“…Skeletal studies have been reported using DDD [16,17]. Using the same type of detector as in this study Völk et al [16] compared conventional screen-film and DDD images on hard copies for 30 patients.…”

Section: Discussionmentioning

confidence: 96%

“…Using the same type of detector as in this study Völk et al [16] compared conventional screen-film and DDD images on hard copies for 30 patients. They concluded that the image quality was good with the DDD system.…”

Section: Discussionmentioning

confidence: 99%

Dose-image optimisation in digital radiology with a direct digital detector: an example applied to pelvic examinations

et al. 2001

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In diagnostic radiology increasing attention has been focused on dose reduction while maintaining a clinically good image quality. With the use of digital detectors balancing dose vs image quality is done differently than in film-screen radiography, since dose and image brightness are uncoupled in digital imaging. In this study a new direct digital detector (flat-panel detector) was used in a dose-image optimisation of a simulated pelvic examination. X-ray images were taken with a direct digital detector (DDD), of the pelvic of a phantom using varying tube current (varying stochastic noise). The entrance surface dose was measured for each image. These images were scored by two radiologists according to EU guidelines. A dose comparison was made with an older PCR system (storage phosphor plates). With decreasing tube current the noise in the images increased and the image with the lowest dose and still acceptable image quality was identified. The results showed that the entrance surface dose using the DDD decreased from 1.4 mGy (PCR value) to 0.48 mGy (DDD standard settings). Through the optimisation the dose could be further decreased to 0.24 mGy while still maintaining an acceptable image quality. A substantial dose reduction was obtained with this new direct digital detector. This simple but efficient optimisation approach is easily applicable to other examinations and both DDD and storage phosphor plate detectors.

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“…Hence, the detector may not only be used at a standard dose level of 2.5 μGy (equivalent to 400 speed) but also at higher dose levels if highest image quality with respect to stochastic noise is required and at reduced dose levels (e.g. by 50%) which were demonstrated to be adequate for skeletal radiography [20]. Even much lower doses were shown to be useful for specific purposes such as the control of implants or search for foreign bodies [21].…”

Section: Dynamic Rangementioning

confidence: 99%

Flat detectors and their clinical applications

Spahn

2005

Eur Radiol

111

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Diagnostic and interventional flat detector X-ray systems are penetrating the market in all application segments. First introduced in radiography and mammography, they have conquered cardiac and general angiography and are getting increasing attention in fluoroscopy. Two flat detector technologies prevail. The dominating method is based on an indirect X-ray conversion process, using cesium iodide scintillators. It offers considerable advantages in radiography, angiography and fluoroscopy. The other method employs a direct converter such as selenium which is particularly suitable for mammography. Both flat detector technologies are based on amorphous silicon active pixel matrices. Flat detectors facilitate the clinical workflow in radiographic rooms, foster improved image quality and provide the potential to reduce dose. This added value is based on their large dynamic range, their high sensitivity to X-rays and the instant availability of the image. Advanced image processing is instrumental in these improvements and expand the range of conventional diagnostic methods. In angiography and fluoroscopy the transition from image intensifiers to flat detectors is facilitated by ample advantages they offer, such as distortion-free images, excellent coarse contrast, large dynamic range and high X-ray sensitivity. These characteristics and their compatibility with strong magnetic fields are the basis for improved diagnostic methods and innovative interventional applications.

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Digital Radiography of the Skeleton Using a Large-Area Detector Based on Amorphous Silicon Technology: Image Quality and Potential for Dose Reduction in Comparison with Screen-Film Radiography

Cited by 36 publications

References 16 publications

Clinical evaluation of digital radiography based on a large-area cesium iodide-amorphous silicon flat-panel detector compared with screen-film radiography for skeletal system and abdomen

Clinical evaluation of digital radiography based on a large-area cesium iodide-amorphous silicon flat-panel detector compared with screen-film radiography for skeletal system and abdomen

Dose-image optimisation in digital radiology with a direct digital detector: an example applied to pelvic examinations

Flat detectors and their clinical applications

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