Reject analysis in direct digital radiography

Andersen, Eivind Richter; Jorde, Jannike; Taoussi, Nadia; Yaqoob, Sadia Halima; Konst, Bente; Seierstad, Therese

doi:10.1258/ar.2011.110350

Cited by 33 publications

(63 citation statements)

References 13 publications

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“…In this study, the image retake rate had been significantly reduced from 4.89% to 3.57% 6 months after introduction with a mean retake rate of 3.97% (SD = 0.28%) within 6 months. Among the retake images, position error and anatomy cutoff (56.05%) is the most frequently observed factor, which is consistent to the findings reported by previous investigations; for example, 51.3% reported by Hofmann et al, 7 77% by Andersen et al, 8 and 45% by Foos et al 6 Possible solutions for reducing image retake rate are to provide the training courses for lessexperienced technicians to increase their professional knowledge and communication skills, as well as to analyze the operation workflow. 15,16 As indicated in Table 3, guidelines 2, 4, and 5 had been applied for successfully reducing position error and anatomy cutoff.…”

Section: Discussionsupporting

confidence: 90%

“…1,2 After the introduction of digital radiography (DR), the retaking rate has been reduced to 5.5% in the United Kingdom 3,4 and 5% in Australia and the United States. 5,6 Some studies still exhibited high retaking rate in DR; as reported in the studies recently conducted in Norway 7,8 and the United States, 9 the retaking rates were as high as 11%-12% and 8%-10%, respectively.…”

Section: Introductionmentioning

confidence: 93%

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Guidelines for reducing image retakes of general digital radiography

Lin

Chan

Huang

et al. 2016

Advances in Mechanical Engineering

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Image retake of radiological examinations not only increases the risk of radiation exposure of the patients, but also wastes the medical resource and degrades the quality of services of the hospitals. This study aimed at discovering factors affecting image retake of general digital radiography for setting guidelines to reduce the image retaking rate. A total of 98,503 general X-ray images retrieved from the picture archiving and communication system database of a medical center in central Taiwan were analyzed. The results showed that the total retaking rate was 4.89% with the position error (56.05%) was the main factor causing image retakes and chest examination showed the highest frequency (1544 cases). On the other hand, skull/face exhibited the highest retaking rate (9.81%) among various types of examinations. After discovering the factors affecting the image retaking rate, suitable guidelines were proposed and introduced. The image retake rate had been significantly reduced to 4.38% and 3.57% 1 month and 6 months, respectively, after the introduction of guidelines. In conclusion, image retake analysis is a quality indicator and is effective for quality assurance of digital radiology. Regular analysis of image retake can find factors inducing image retake and is useful for designing guidelines to reduce the image retake rate.

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Section: Discussionsupporting

confidence: 90%

Section: Introductionmentioning

confidence: 93%

Guidelines for reducing image retakes of general digital radiography

Lin

Chan

Huang

et al. 2016

Advances in Mechanical Engineering

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“…Rejects, deletions, and subsequent retakes of diagnostic X-ray images impose professional and ethical challenges within radiological imaging ( 1 ); it occupies unnecessary processing and personnel resources ( 2 – 5 ), indicates suboptimal quality management ( 6 – 8 ), and exposes patients to unnecessary ionizing radiation and added inconveniences ( 9 ). Traditionally reject/deletion/retake rates for film-based departments have been documented to be in the range of 10–15% ( 8 , 10 – 17 ), and their main cause has been attributed incorrect exposures due to limited dynamic range of screen/film systems.…”

Section: Introductionmentioning

confidence: 99%

Image rejects in general direct digital radiography

Hofmann

Rosanowsky

Jensen

et al. 2015

Acta Radiologica Open

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BackgroundThe number of rejected images is an indicator of image quality and unnecessary imaging at a radiology department. Image reject analysis was frequent in the film era, but comparably few and small studies have been published after converting to digital radiography. One reason may be a belief that rejects have been eliminated with digitalization.PurposeTo measure the extension of deleted images in direct digital radiography (DR), in order to assess the rates of rejects and unnecessary imaging and to analyze reasons for deletions, in order to improve the radiological services.Material and MethodsAll exposed images at two direct digital laboratories at a hospital in Norway were reviewed in January 2014. Type of examination, number of exposed images, and number of deleted images were registered. Each deleted image was analyzed separately and the reason for deleting the image was recorded.ResultsOut of 5417 exposed images, 596 were deleted, giving a deletion rate of 11%. A total of 51.3% were deleted due to positioning errors and 31.0% due to error in centering. The examinations with the highest percentage of deleted images were the knee, hip, and ankle, 20.6%, 18.5%, and 13.8% respectively.ConclusionThe reject rate is at least as high as the deletion rate and is comparable with previous film-based imaging systems. The reasons for rejection are quite different in digital systems. This falsifies the hypothesis that digitalization would eliminates rejects. A deleted image does not contribute to diagnostics, and therefore is an unnecessary image. Hence, the high rates of deleted images have implications for management, training, education, as well as for quality.

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“…Such image rejects /retakes impose challenges within radiographic imaging: they occupy unnecessary resources, expose patients to unnecessary ionizing radiation, and might indicate suboptimal quality management. A number of studies have shown that image reject /retake rates decreased substantially with the introduction of digital imaging, from 10-15 % to 3-5 % (1-4), mainly because exposure errors almost completely vanished, Later studies, however, have indicated that due to increasing occurrences of image positioning and centring errors, reject/retake rates once more have increased (5)(6)(7). One of these studies (7) reported rejects /retakes for knee and shoulder imaging to be 20,6 % and 9,4 %, respectively, in which positioning and centring errors contributed approx.…”

Section: Introductionmentioning

confidence: 99%

How radiographers visually perceive X-ray images with the task of accepting or rejecting them – a pilot study

Waaler¹,

Hammer²,

Langdalen³

et al. 2017

RadOpen

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Introduction: Radiographer´s usual role in the medical imaging chain is to acquire relevant and qualitatively good images that help the radiologist or physician to diagnose most accurately. After the image acquisition, the radiographer does a quality evaluation based on established imaging criteria to decide if the image is satisfactory, or otherwise reject it and subsequently take a new one. Contrary to expectations that the number of image rejects should decrease substantially with the introduction of digital imaging, a number of studies have shown that it has not, although the reasons for rejects has changed from exposure errors to positioning and centring errors. Very little research has been on examining how radiographers visually perceive and evaluate the X-ray images in this acceptance/rejection process.

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Reject analysis in direct digital radiography

Abstract: An overall rejection rate of 12% indicates a need for optimizing radiographic practice in the department.

Cited by 33 publications

References 13 publications

Guidelines for reducing image retakes of general digital radiography

Guidelines for reducing image retakes of general digital radiography

Image rejects in general direct digital radiography

How radiographers visually perceive X-ray images with the task of accepting or rejecting them – a pilot study

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