Quality Assurance in Mammography: Artifact Analysis

Hogge, Jacquelyn P.; Palmer, Clare; Müller, Christian-Andreas; Little, Sherrill; Smith, Dineen; Fatouros, Panos P.; Paredes, Ellen Shaw de

doi:10.1148/radiographics.19.2.g99mr13503

Cited by 35 publications

(17 citation statements)

References 9 publications

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“…These factors include the knowledge and training of the radiographer (such as positioning errors, and dark and light films), the patient (preparation and motion), the organisation of the practice, and equipment failure. 5 The role, knowledge and ongoing performance of the radiographer is critical to ensuring that all procedures are undertaken within the quality criteria and standards required. 6 With the introduction and application of clinical governance to all clinical areas, the onus is now on healthcare professionals including radiographers to evaluate performance, develop departmental Abstract A study was undertaken to identify the causes of unnecessary repeated medical imaging examinations.…”

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confidence: 99%

Uncovering the causes of unnecessary repeated medical imaging examinations, or part of, in two hospital departments

2005

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A study was undertaken to identify the causes of unnecessary repeated medical imaging examinations. The repeat analysis study investigated repeated medical imaging examinations at two medium sized hospitals in Sydney, Australia. The analytical part of the study was conducted jointly by a radiologist and a radiographer. Overall there were 9.3% and 7.2% of total films repeated respectively at the two hospital sites. Unnecessary repeats were found to have been caused by numerous factors including: poor technical judgement, the adoption of unconventional techniques, non availability of radiologist for advice, patient movement or motion, equipment mishandling, disorganised practice and poor supervision of students. At both of the sites, senior radiographers were associated with 70.2% and 84.5% respectively of dark and light film errors, and 59.7% and 85.5% respectively of the repeated cases had students' involvement. On the other hand, junior radiographers were involved with 70.3% and 86.1 % respectively of positioning errors. It was recommended that major changes be introduced to radiographer practice including, quality control, radiological techniques, training, supervision and continuing professional development. It was also recommended that the radiologist takes a more active role in future guidance and training of radiographers.

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confidence: 99%

Uncovering the causes of unnecessary repeated medical imaging examinations, or part of, in two hospital departments

2005

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“…Podem ser causados por falha na rotação do espelho de colimação do campo de visão durante a exposição do raio-X, falha na movimentação da grade (Figura 9), materiais que caem dentro do compartimento do tubo de raio-X, falha na compressão (Figura 10), alinhamento inadequado do remo de compressão com a bandeja do "buck" e defeito no remo de compressão (6) . Qualquer erro na compressão mamária resultará em imagem obscurecida, devido à moção e à compressão inadequada.…”

Section: Artefatos Relacionados Ao Mamógrafounclassified

Controle de qualidade e artefatos em mamografia

Caldas¹,

Isa²,

Trippia³

et al. 2005

Radiol Bras

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A mamografia, na atualidade, é o método mais efetivo de diagnóstico precoce do câncer de mama. Um exame com alto padrão de qualidade pode visualizar, em 85% a 90% dos casos, um tumor com mais de dois anos de antecedência de ocorrer acometimento ganglionar, em mulheres com mais de 50 anos de idade. A diferença radiográfica entre o tecido normal e o doente é extremamente tênue, logo, a alta qualidade do exame é indispensável para alcançar resolução de alto contraste que permita essa diferenciação. Para alcançar alto padrão é imperativo que o exame mamográfico siga protocolos rígidos e pré-estabelecidos. Os artefatos são defeitos no processamento do filme que comprometem o resultado final da imagem, podendo resultar em informações perdidas ou mascaradas. Há numerosos tipos de artefatos derivados de diversas fontes na aquisição da imagem, como o processador, o desempenho do técnico de radiologia, o mamógrafo ou o paciente, todos resultando na degradação da imagem obtida. O presente artigo tem o objetivo de revisar métodos eficazes no controle de qualidade do exame mamográfico e analisar os artefatos mais importantes na prática diária, com ilustrações e dicas de como evitá-los. Unitermos: Câncer de mama diagnóstico; Radiologia da mama controle de qualidade; Artefato. Quality control and artifacts in mammography.Currently, mammography is the most effective method for an early diagnosis of breast cancer. In 85% to 90% of the cases, a high quality mammography allows the visualization of a tumor more than two years before the occurrence of lymph nodes involvement in women over 50 years of age. The radiological appearance of a normal and a sick tissue is very similar, therefore, a high quality of the scan is essential to obtain high contrast resolution to allow distinguishing them. Strict and preestablished protocols must be followed during mammography in order to reach high quality standards. Artifacts are defects occurred during film processing that interfere in the quality of the final image and can result in loss or masked information. Several types of artifacts from different sources can occur during image acquisition. These can be caused by the processor, the radiology technician, the mammography unit or the patient, and all result in degradation of the image acquired. The aim of this study is to review the effective methods that can be used in the quality control of mammography and to analyze the most important artifacts occurring in the daily practice, showing illustrations and suggestions on how to avoid them.

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“…Unnecessary breast surgery can can thus be avoided. und die individuelle Optimierung der Mammographie, um Aufnahmen von hoher Qualita Èt zu erhalten [4,5]. Der Radiologe muss aber nicht nur in der Lage sein, ein Mammakarzinom mo Èglichst fru Èhzeitig und sicher zu erkennen.…”

Section: Preoperative Conference Optimizes Indication For Breast Biopsyunclassified

Optimierung der Indikationsstellung zur Mamma-PE durch präoperative Konferenz

Peters¹,

Jacobi²,

Kirchner³

2001

Zentralbl Gynakol

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In connection with a series of second reviews of mammographies as part of a preoperative conference, criteria are presented that allow a correct diagnosis, thus avoiding unnecessary breast surgery. In addition, it is shown that preoperatively all diagnostic findings must be reviewed as a whole, in order to make the appropriate decision for the patient. A total of 145 patients was admitted for breast surgery between 1994 and 1997. Group 1: The mammographies of 133 patients were re-evaluated and additional exams were performed. In only 17% (23 cases) could the first diagnosis be confirmed and the patients went to surgery. In 110 cases a single mammographic view sufficed to show that there was no suspicious finding in the breast. Instead there was a pseudolesion, not visible after an image had been taken with appropriate technique. Group 2: For 12 additional patients, a synopsis of different findings was presented and analysed at a preoperative conference. Even although imaging may have been performed correctly, a conference can still contribute to the optimization of indocations. Unnecessary breast surgery can can thus be avoided.

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Quality Assurance in Mammography: Artifact Analysis

Cited by 35 publications

References 9 publications

Uncovering the causes of unnecessary repeated medical imaging examinations, or part of, in two hospital departments

Uncovering the causes of unnecessary repeated medical imaging examinations, or part of, in two hospital departments

Controle de qualidade e artefatos em mamografia

Optimierung der Indikationsstellung zur Mamma-PE durch präoperative Konferenz

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