Correlation between effective dose and radiological risk: general concepts

Costa, Paulo Roberto; Yoshimura, Elisabeth Mateus; Nersissian, Denise Yanikian; Melo, Cláudio Manoel Rodrigues de

doi:10.1590/0100-3984.2014.0097

Cited by 6 publications

(4 citation statements)

References 25 publications

(27 reference statements)

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“…Also, patient-specific E estimation from internal emitters ( 18 F-FDG) requires carrying out subsequent scans over time intervals which was a further shortcoming in our retrospective study. However, the estimated mean E from 18 F-FDG PET/CT was well-correlated with the reported dose estimates in more dedicated studies [35][36][37][38][39][40]. Future studies may also include further analysis of clinical data presented in Fig.…”

Section: Discussionsupporting

confidence: 71%

Patients undergoing multiple 18F-FDG PET/CT scans: frequency, clinical indications, and cumulative dose

et al. 2023

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Objective To assess frequency, clinical indications, and cumulative effective dose (CED) of patients undergoing multiple 18 F-FDG PET/CT imaging. Methods Retrospective analysis of 18 F-FDG PET/CT scans performed at a university hospital for 11 years was done. The effective dose was estimated from activity administered and dose-length-product. Results A total of 55,424 18 F-FDG PET/CT scans were performed in 32,658 patients. The average injected activity was 421 MBq and median 417 MBq. 24.2% of the patients were scanned 2-5 times in a year, 16.7% of them being unique patients (not counted as a separate patient in different years). The maximum PET/CT scans in a year for any patient was five. 23,571 (72.2%) patients underwent a single 18 F-FDG PET/CT scan, while 9087 (27.8%) unique patients underwent 2-23 scans during 11 years. 82% of the scanned patients had a malignant disease, and 2.4% of patients with ≥ 2 18 scans in a year had non-malignant indications. 1.4% of patients received CED ≥ 100 mSv in one year from multiple 18 F-FDG PET/CT scans and 0.8% of them received ≥ 100 mSv in a year more than one time, the CED of 27.8% (9087 patients) who underwent 2 to 23 18 F-FDG PET/CT scans over 11-years ranged from 38 to 575 mSv (median: 271 mSv). Conclusion This largest ever study covering analysis of 11-years' data of 18 F-FDG PET/CT patients showed that a sizeable number of patients, largely with malignant disease (82%) undergo recurrent imaging during one year and non-ignorable fraction exceed 100 mSv in one year.

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Section: Discussionsupporting

confidence: 71%

Patients undergoing multiple 18F-FDG PET/CT scans: frequency, clinical indications, and cumulative dose

et al. 2023

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“…O acúmulo de dose de radiação nos indivíduos pode promover alguns efeitos indesejados. Os riscos à saúde resultantes dos efeitos estocásticos decorrentes da exposição à radiação ionizante (COSTA et al, 2016; UNITED NATIONS SCIENTIFIC COMMITTEE ON THE EFFECTS OF ATOMIC RADIATION, 2010). Grandezas dosimétricas tem sido utilizada com intuito de estabelecer limites de exposição para a proteção de indivíduos ocupacionalmente expostos e da população em geral contra os efeitos cancerígenos e hereditários da radiação ionizante (OKUNO; YOSHIMURA, 2010).…”

Section: Introductionunclassified

Como Prevenir a Queda? Contribuição Para a Compreensão Dos Fatores De Risco Em Adultos Mais Velhos a Residir Na Comunidade

Lemos¹,

Lemos²,

Pinheiro³

et al. 2021

Medicina: Aspectos Epidemiológicos, Clínicos E Estratégicos De Tratamento 6

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Direitos para esta edição cedidos à Atena Editora pelos autores. Todo o conteúdo deste livro está licenciado sob uma Licença de Atribuição Creative Commons. Atribuição-Não-Comercial-NãoDerivativos 4.0 Internacional (CC BY-NC-ND 4.0).O conteúdo dos artigos e seus dados em sua forma, correção e confiabilidade são de responsabilidade exclusiva dos autores, inclusive não representam necessariamente a posição oficial da Atena Editora. Permitido o download da obra e o compartilhamento desde que sejam atribuídos créditos aos autores, mas sem a possibilidade de alterá-la de nenhuma forma ou utilizá-la para fins comerciais. Todos os manuscritos foram previamente submetidos à avaliação cega pelos pares, membros do Conselho Editorial desta Editora, tendo sido aprovados para a publicação com base em critérios de neutralidade e imparcialidade acadêmica.A Atena Editora é comprometida em garantir a integridade editorial em todas as etapas do processo de publicação, evitando plágio, dados ou resultados fraudulentos e impedindo que interesses financeiros comprometam os padrões éticos da publicação. Situações suspeitas de má conduta científica serão investigadas sob o mais alto padrão de rigor acadêmico e ético.

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“…Dosimetric quantities for use in the computed tomography (CT), such as CT dose index (CTDI) and dose-length tomography (DLP), may be used as tools for identifying excessive or insufficient exposures for the diagnostic images, because they are associated with the doses delivered to the patients. The pattern identification of these quantities is a milestone of the optimization process in the pediatric population that undergoes CT procedures, considering that the dose absorbed by the patient is not a trivial task [13][14][15][16] .…”

Section: Introductionmentioning

confidence: 99%

Paediatric CT Dose Optimization in a General Hospital

et al. 2019

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This work presents a methodology for the optimization of protocols applied to pediatric patients who underwent brain and chest computed tomography examinations. The implementation of this methodology aims to reduce the dose of ionizing radiation delivered to patients and the consequent risk associated with radiation, without decreasing the diagnostic image quality. The comparison between the results of CTDIvol (computed tomography dose index) and DLP (dose-length product) dosimetric quantities before the optimization process and their corresponding results after the implementation of the optimization process was done through boxplot graphs. It is noteworthy that the implementation of this methodology allows reductions in the range between 18 and 50% of the dosimetric values evaluated in this study. In addition, the case of brain computed tomography scans, in which the cohort of the evaluated patients is larger, is a highlight, which should also reflect in the reduction of the absorbed radiation dose by this particularly important group of patients.

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Correlation between effective dose and radiological risk: general concepts

Cited by 6 publications

References 25 publications

Patients undergoing multiple 18F-FDG PET/CT scans: frequency, clinical indications, and cumulative dose

Patients undergoing multiple 18F-FDG PET/CT scans: frequency, clinical indications, and cumulative dose

Como Prevenir a Queda? Contribuição Para a Compreensão Dos Fatores De Risco Em Adultos Mais Velhos a Residir Na Comunidade

Paediatric CT Dose Optimization in a General Hospital

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