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Ren L, Feng M, Luo Y, Chen Y. Risk of Cancer in Patients with Congenital Heart Disease: A Systematic Review and Meta-Analysis. Cardiology 2024:1-8. [PMID: 39053445 DOI: 10.1159/000540443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Accepted: 07/14/2024] [Indexed: 07/27/2024]
Abstract
INTRODUCTION There has been remarkable progress in both diagnosis and treatment of patients with congenital heart disease (CHD), with an increasing number of survivors. Whether patients with CHD are more likely to develop cancer is still a controversial issue. This study aimed to quantitatively estimate the association between patients with CHD and the risk of developing cancer through meta-analysis. METHODS Web of Science, PubMed, and Embase databases were searched from inception to September 2023 to identify potentially relevant case-control studies and cohort studies that reported risk estimates and confidence intervals (CIs). RevMan software was used to analyze the pooled effect size and test for heterogeneity. The random effect and fixed effect models were applied to the study period. Egger's test was performed to examine publication bias. RESULTS We analyzed six studies, consisting of 2 case-control studies and 4 cohort studies comprising 276,124 participants. The overall pooled hazard risk for cancer in patients with CHD was 1.71 (95% CI: 1.28-2.28; p < 0.01), with significant heterogeneity (I2 = 97%, p < 0.01). The quantitative analysis of studies indicates that patients with CHD have an increased risk of developing cancer, even after adjusting for chromosomal disorders. CONCLUSION Our study highlights the importance of controlling modifiable factors in cancer prevention and emphasizes the need for health education for patients with CHD in primary care. Given the limited number of studies included in this analysis, further research is needed to accurately quantify the cancer risk of exposed versus unexposed CHD.
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Affiliation(s)
- Lijuan Ren
- Department of Critical Care Medicine, West China Hospital, Sichuan University/West China School of Nursing, Sichuan University, Chengdu, China
| | - Mei Feng
- Department of Critical Care Medicine, West China Hospital, Sichuan University/West China School of Nursing, Sichuan University, Chengdu, China
| | - Yulan Luo
- Department of Critical Care Medicine, West China Hospital, Sichuan University/West China School of Nursing, Sichuan University, Chengdu, China
| | - Yu Chen
- Department of Critical Care Medicine, West China Hospital, Sichuan University/West China School of Nursing, Sichuan University, Chengdu, China
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Plasencia-Martínez JM, Sánchez-Canales M, Otón-González E, Casado-Alarcón NI, Molina-Lozano B, Cotillo-Ramos E, Ortiz-Mayoral H, García-Santos JM. Inappropriate requests for cranial CT scans in emergency departments increase overuse and reduce test performance. Emerg Radiol 2023; 30:733-741. [PMID: 37973624 DOI: 10.1007/s10140-023-02185-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Accepted: 11/01/2023] [Indexed: 11/19/2023]
Abstract
PURPOSE The number of non-traumatic urgent cranial computed tomography (NT-UCCT) is exponentially increasing but limited research has been conducted on the quality of clinical justification. Accordingly, we aimed (1) to assess how clinical information in the electronic NT-UCCT request agreed with that provided in the patient's emergency department discharge summary and (2) to analyze the potential effect of those discrepancies on the NT-UCCT overload. MATERIAL AND METHODS Patients undergoing NT-UCCT in 2017-2021 were randomly selected for this retrospective research-board-approved study. Signs and symptoms (S/S) in electronic request and emergency department discharge summary, acute and relevant computed tomography (CT) findings (acute ischemia or hemorrhage, masses, brain edema, or previously undetected hydrocephalus), and final diagnosis at emergency department discharge summary were collected. Concordance between digital request and emergency department discharge summary and their association with both acute and relevant CT findings and final diagnosis were analyzed. RESULTS We recruited 156 patients: 80 men; mean age, 55. Acute, relevant CT findings were detected in 28 cases (17.9%). The final diagnosis was neurological disease, non-neurological disease, and no definitive diagnosis in 46 (29.5%), 58 (37.2%), and 51 (32.7%) cases, respectively. Full agreement between the electronic request and emergency department discharge summary occurred in only 36 patients (23.1%). Motor deficit was the most frequent false positive electronic request S/S (18; 11.54%), having low positive predictive value (30.30%; 95%CI 15.59-48.71%) and worst association with acute relevant CT findings than when true positive (OR 2.54; 95%CI 0.04-6.21 vs. OR 6.26, 95%CI 2.21-17.78). Nausea/vomiting was the third most common false negative electronic request S/S (13; 10.26%) and reduced the likelihood of acute and relevant CT findings (OR 0.126; 95%CI 0.016-0.971; p = 0.020). False S/S in electronic request predominated in non-neurological diseases (50-60.2% vs. 33-39.8%; p = 0.068). CONCLUSION Discrepancies between electronic request and emergency department discharge summary were observed in >75% of patients, leading to unnecessary NT-UCCT tests.
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Affiliation(s)
- Juana María Plasencia-Martínez
- Department of Radiology, Hospital General Universitario Morales Meseguer, Avenida Marqués de los Vélez, s/n, 30008, Murcia, Spain.
| | - Marta Sánchez-Canales
- Department of Radiology, Hospital General Universitario Morales Meseguer, Avenida Marqués de los Vélez, s/n, 30008, Murcia, Spain
| | - Elena Otón-González
- Department of Radiology, Hospital General Universitario Morales Meseguer, Avenida Marqués de los Vélez, s/n, 30008, Murcia, Spain
| | - Nuria Isabel Casado-Alarcón
- Department of Radiology, Hospital General Universitario Morales Meseguer, Avenida Marqués de los Vélez, s/n, 30008, Murcia, Spain
| | | | - Estefanía Cotillo-Ramos
- Department of Radiology, Hospital General Universitario Morales Meseguer, Avenida Marqués de los Vélez, s/n, 30008, Murcia, Spain
| | - Herminia Ortiz-Mayoral
- Department of Radiology, Hospital General Universitario Morales Meseguer, Avenida Marqués de los Vélez, s/n, 30008, Murcia, Spain
| | - José María García-Santos
- Department of Radiology, Hospital General Universitario Morales Meseguer, Avenida Marqués de los Vélez, s/n, 30008, Murcia, Spain
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Shelly E, Waldron MG, Field E, Moore N, Young R, Scally A, England A, Maher M, McEntee MF. Cumulative Radiation Dose from Medical Imaging in Children with Congenital Heart Disease: A Systematic Review. CHILDREN (BASEL, SWITZERLAND) 2023; 10:children10040645. [PMID: 37189893 DOI: 10.3390/children10040645] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Revised: 03/18/2023] [Accepted: 03/27/2023] [Indexed: 05/17/2023]
Abstract
Children with congenital heart disease are exposed to repeated medical imaging throughout their lifetime. Although the imaging contributes to their care and treatment, exposure to ionising radiation is known to increase one's lifetime attributable risk of malignancy. A systematic search of multiple databases was performed. Inclusion and exclusion criteria were applied to all relevant papers and seven were deemed acceptable for quality assessment and risk of bias assessment. The cumulative effective dose (CED) varied widely across the patient cohorts, ranging from 0.96 mSv to 53.5 mSv. However, it was evident across many of the included studies that a significant number of patients were exposed to a CED >20 mSv, the current annual occupational exposure limit. Many factors affected the dose which patients received, including age and clinical demographics. The imaging modality which contributed the most radiation dose to patients was cardiology interventional procedures. Paediatric patients with congenital heart disease are at an increased risk of receiving an elevated cumulative radiation dose across their lifetime. Further research should focus on identifying risk factors for receiving higher radiation doses, keeping track of doses, and dose optimisation where possible.
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Affiliation(s)
- Emer Shelly
- Discipline of Medical Imaging & Radiation Therapy, University College Cork, T12AK54 Cork, Ireland
| | - Michael G Waldron
- Department of Radiology, Cork University Hospital, T12 DC4A Cork, Ireland
| | - Erica Field
- Discipline of Medical Imaging & Radiation Therapy, University College Cork, T12AK54 Cork, Ireland
| | - Niamh Moore
- Discipline of Medical Imaging & Radiation Therapy, University College Cork, T12AK54 Cork, Ireland
| | - Rena Young
- Discipline of Medical Imaging & Radiation Therapy, University College Cork, T12AK54 Cork, Ireland
| | - Andy Scally
- Discipline of Medical Imaging & Radiation Therapy, University College Cork, T12AK54 Cork, Ireland
| | - Andrew England
- Discipline of Medical Imaging & Radiation Therapy, University College Cork, T12AK54 Cork, Ireland
| | - Michael Maher
- Department of Radiology, Cork University Hospital, T12 DC4A Cork, Ireland
- Department of Medicine, University College Cork, T12 AK54 Cork, Ireland
| | - Mark F McEntee
- Discipline of Medical Imaging & Radiation Therapy, University College Cork, T12AK54 Cork, Ireland
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Thierry-Chef I, Ferro G, Le Cornet L, Dabin J, Istad TS, Jahnen A, Lee C, Maccia C, Malchair F, Olerud HM, Harbron RW, Figuerola J, Hermen J, Moissonnier M, Bernier MO, Bosch de Basea MB, Byrnes G, Cardis E, Hauptmann M, Journy N, Kesminiene A, Meulepas JM, Pokora R, Simon SL. Dose Estimation for the European Epidemiological Study on Pediatric Computed Tomography (EPI-CT). Radiat Res 2021; 196:74-99. [PMID: 33914893 DOI: 10.1667/rade-20-00231.1] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Accepted: 03/26/2021] [Indexed: 11/03/2022]
Abstract
Within the European Epidemiological Study to Quantify Risks for Paediatric Computerized Tomography (EPI-CT study), a cohort was assembled comprising nearly one million children, adolescents and young adults who received over 1.4 million computed tomography (CT) examinations before 22 years of age in nine European countries from the late 1970s to 2014. Here we describe the methods used for, and the results of, organ dose estimations from CT scanning for the EPI-CT cohort members. Data on CT machine settings were obtained from national surveys, questionnaire data, and the Digital Imaging and Communications in Medicine (DICOM) headers of 437,249 individual CT scans. Exposure characteristics were reconstructed for patients within specific age groups who received scans of the same body region, based on categories of machines with common technology used over the time period in each of the 276 participating hospitals. A carefully designed method for assessing uncertainty combined with the National Cancer Institute Dosimetry System for CT (NCICT, a CT organ dose calculator), was employed to estimate absorbed dose to individual organs for each CT scan received. The two-dimensional Monte Carlo sampling method, which maintains a separation of shared and unshared error, allowed us to characterize uncertainty both on individual doses as well as for the entire cohort dose distribution. Provided here are summaries of estimated doses from CT imaging per scan and per examination, as well as the overall distribution of estimated doses in the cohort. Doses are provided for five selected tissues (active bone marrow, brain, eye lens, thyroid and female breasts), by body region (i.e., head, chest, abdomen/pelvis), patient age, and time period (1977-1990, 1991-2000, 2001-2014). Relatively high doses were received by the brain from head CTs in the early 1990s, with individual mean doses (mean of 200 simulated values) of up to 66 mGy per scan. Optimization strategies implemented since the late 1990s have resulted in an overall decrease in doses over time, especially at young ages. In chest CTs, active bone marrow doses dropped from over 15 mGy prior to 1991 to approximately 5 mGy per scan after 2001. Our findings illustrate patterns of age-specific doses and their temporal changes, and provide suitable dose estimates for radiation-induced risk estimation in epidemiological studies.
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Affiliation(s)
- Isabelle Thierry-Chef
- International Agency for Research on Cancer, Lyon, France
- Barcelona Institute for Global Health (ISGlobal), Barcelona, Spain
- Universitat Pompeu Fabra (UPF), Barcelona, Spain
- Ciber Epidemiología y Salud Pública (CIBERESP), Madrid, Spain
| | - Gilles Ferro
- International Agency for Research on Cancer, Lyon, France
| | - Lucian Le Cornet
- Institute of Medical Biostatistics, Epidemiology and Informatics, University Medical Center Mainz, Mainz, Germany
- German Cancer Research Center, Heidelberg, Germany
| | - Jérémie Dabin
- Belgian Nuclear Research Centre, SCK CEN, Mol, Belgium
| | - Tore S Istad
- Norwegian Radiation and Nuclear Safety Authority, NO-0213 Oslo, Norway
| | - Andreas Jahnen
- Luxembourg Institute of Science and Technology, Esch-sur-Alzette, Luxembourg
| | - Choonsik Lee
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Rockville, Maryland
| | | | | | - Hilde M Olerud
- University of South-Eastern Norway, Faculty of Health and Social Sciences, Kongsberg, Norway
| | - Richard W Harbron
- Institute of Health and Society, Newcastle University (UNEW), Newcastle upon Tyne, United Kingdom
- NIHR Health Protection Research Unit in Chemical and Radiation Threats and Hazards, Newcastle University, United Kingdom
- Barcelona Institute for Global Health (ISGlobal), Barcelona, Spain
- Universitat Pompeu Fabra (UPF), Barcelona, Spain
- Ciber Epidemiología y Salud Pública (CIBERESP), Madrid, Spain
| | - Jordi Figuerola
- Barcelona Institute for Global Health (ISGlobal), Barcelona, Spain
- Universitat Pompeu Fabra (UPF), Barcelona, Spain
- Ciber Epidemiología y Salud Pública (CIBERESP), Madrid, Spain
| | - Johannes Hermen
- Luxembourg Institute of Science and Technology, Esch-sur-Alzette, Luxembourg
| | | | - Marie-Odile Bernier
- Institut de Radioprotection et de Sûreté Nucléaire, Laboratoire d'épidémiologie des Rayonnements Ionisants, Fontenay-aux-Roses, France
| | - Magda Bosch Bosch de Basea
- Barcelona Institute for Global Health (ISGlobal), Barcelona, Spain
- Universitat Pompeu Fabra (UPF), Barcelona, Spain
- Ciber Epidemiología y Salud Pública (CIBERESP), Madrid, Spain
| | - Graham Byrnes
- International Agency for Research on Cancer, Lyon, France
| | - Elisabeth Cardis
- Barcelona Institute for Global Health (ISGlobal), Barcelona, Spain
- Universitat Pompeu Fabra (UPF), Barcelona, Spain
- Ciber Epidemiología y Salud Pública (CIBERESP), Madrid, Spain
| | - Michael Hauptmann
- Department of Epidemiology and Biostatistics, Netherlands Cancer Institute, Amsterdam, the Netherlands
- Institute of BiostatisTics and Registry Research, Medical University Brandenburg Theodor Fontane, Neuruppin, Germany
| | - Neige Journy
- Institut de Radioprotection et de Sûreté Nucléaire, Laboratoire d'épidémiologie des Rayonnements Ionisants, Fontenay-aux-Roses, France
- French National Institute of Health and Medical Research (Inserm) Unit 1018, Centre for Research in Epidemiology and Population Health (CESP), Cancer and Radiations Group, Gustave Roussy, Villejuif, France
| | | | - Johanna M Meulepas
- Department of Epidemiology and Biostatistics, Netherlands Cancer Institute, Amsterdam, the Netherlands
| | - Roman Pokora
- Institute of Medical Biostatistics, Epidemiology and Informatics, University Medical Center Mainz, Mainz, Germany
| | - Steven L Simon
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Rockville, Maryland
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Dieng M, Khanna N, Nguyen MTH, Turner R, Lord SJ, Menzies AM, Allen J, Saw R, Nieweg OE, Thompson J, Morton RL. Cost-effectiveness analysis of PET/CT surveillance imaging to detect systemic recurrence in resected stage III melanoma: study protocol. BMJ Open 2020; 10:e037857. [PMID: 33154047 PMCID: PMC7646332 DOI: 10.1136/bmjopen-2020-037857] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Revised: 06/29/2020] [Accepted: 08/11/2020] [Indexed: 11/17/2022] Open
Abstract
INTRODUCTION In the new era of effective systemic therapies for advanced melanoma, early detection of lower volume recurrent disease using surveillance imaging can improve survival. However, intensive imaging follow-up strategies are likely to increase costs to health systems and may pose risks to patients. The objective of this study is to estimate from the Australian health system perspective the cost-effectiveness of four follow-up strategies in resected stage III melanoma over a 5-year period following surgical treatment with curative intent. METHODS AND ANALYSIS A decision-analytic model will be built to estimate the costs and benefits of (1) 12 monthly, (2) 6 monthly, (3) 3-4 monthly positron emission tomography/CT imaging for 5 years, compared with (4) no imaging follow-up. The model will be populated with probabilities of disease recurrence, test performance measures using data from >1000 consecutive resected stage III melanoma patients from Melanoma Institute Australia diagnosed between 2000 and 2017. Healthcare resource use, including surveillance imaging, doctor's visits, subsequent tests and procedures to investigate suspicious findings, will be quantified from detailed patient records and valued using Australian reference pricing. Economic outcomes include cost per new distant melanoma recurrence detected and cost per diagnostic error avoided, for no imaging compared with the other strategies.Deterministic sensitivity analyses will examine the robustness of model results. ETHICS AND DISSEMINATION This study was approved by the Sydney Local Health District, Sydney Local Health District Ethics Review Committee (RPAH Zone), AU/1/830638 and the Australian Institute of Health and Welfare (EO2019-1-454). The results of this study will be published in peer-reviewed medical and health economics journals and will inform melanoma management guidelines.
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Affiliation(s)
- Mbathio Dieng
- NHMRC Clinical Trials Centre, Faculty of Medicine and Health, The University of Sydney, Camperdown, New South Wales, Australia
| | - Nikita Khanna
- NHMRC Clinical Trials Centre, Faculty of Medicine and Health, The University of Sydney, Camperdown, New South Wales, Australia
| | - Mai Thi Hoang Nguyen
- NHMRC Clinical Trials Centre, Faculty of Medicine and Health, The University of Sydney, Camperdown, New South Wales, Australia
| | - Robin Turner
- Biostatistics, University of Otago Dunedin School of Medicine, Dunedin, New Zealand
| | - Sarah J Lord
- NHMRC Clinical Trials Centre, Faculty of Medicine and Health, The University of Sydney, Camperdown, New South Wales, Australia
| | - Alexander M Menzies
- Melanoma Institute Australia, The University of Sydney, North Sydney, New South Wales, Australia
- Department of Medical Oncology, Royal North Shore and Mater Hospitals, Sydney, New South Wales, Australia
| | - Jay Allen
- Melanoma Institute Australia, The University of Sydney, North Sydney, New South Wales, Australia
| | - Robyn Saw
- Melanoma Institute Australia, The University of Sydney, North Sydney, New South Wales, Australia
| | - Omgo E Nieweg
- Melanoma Institute Australia, The University of Sydney, North Sydney, New South Wales, Australia
- Department of Melanoma and Surgical Oncology, Royal Prince Alfred Hospital, Sydney, New South Wales, Australia
| | - John Thompson
- Surgical Oncology, Melanoma Institute of Australia, North Sydney, New South Wales, Australia
- Sydney Medical School, The University of Sydney, Sydney, New South Wales, Australia
| | - Rachael L Morton
- NHMRC Clinical Trials Centre, Faculty of Medicine and Health, The University of Sydney, Camperdown, New South Wales, Australia
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Ionizing Radiation and Translation Control: A Link to Radiation Hormesis? Int J Mol Sci 2020; 21:ijms21186650. [PMID: 32932812 PMCID: PMC7555331 DOI: 10.3390/ijms21186650] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Accepted: 09/04/2020] [Indexed: 02/06/2023] Open
Abstract
Protein synthesis, or mRNA translation, is one of the most energy-consuming functions in cells. Translation of mRNA into proteins is thus highly regulated by and integrated with upstream and downstream signaling pathways, dependent on various transacting proteins and cis-acting elements within the substrate mRNAs. Under conditions of stress, such as exposure to ionizing radiation, regulatory mechanisms reprogram protein synthesis to translate mRNAs encoding proteins that ensure proper cellular responses. Interestingly, beneficial responses to low-dose radiation exposure, known as radiation hormesis, have been described in several models, but the molecular mechanisms behind this phenomenon are largely unknown. In this review, we explore how differences in cellular responses to high- vs. low-dose ionizing radiation are realized through the modulation of molecular pathways with a particular emphasis on the regulation of mRNA translation control.
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Stern H, Seidenbusch M, Hapfelmeier A, Meierhofer C, Naumann S, Schmid I, Spix C, Ewert P. Increased Cancer Incidence Following up to 15 Years after Cardiac Catheterization in Infants under One Year between 1980 and 1998-A Single Center Observational Study. J Clin Med 2020; 9:E315. [PMID: 31979109 PMCID: PMC7074298 DOI: 10.3390/jcm9020315] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Revised: 01/19/2020] [Accepted: 01/20/2020] [Indexed: 11/17/2022] Open
Abstract
OBJECTIVE To evaluate the incidence of cancer within the first 15 years of life in children who underwent cardiac catheterization under the age of one year. METHODS In this retrospective, single center study, 2770 infants (7.8% with trisomy 21) were studied. All infants underwent cardiac catheterization under one year of age between January 1980 and December 1998. Newly diagnosed cancer in the first 15 years of life was assessed through record linkage to the German Childhood Cancer Registry (GCCR). Cancer risk in study patients was compared to the GCCR population of children less than 15 years. Patients with trisomy 21 were compared to the Danish Cytogenic Register for trisomy 21. Effective radiation doses were calculated for each tumor patient and 60 randomly selected patients who did not develop cancer. RESULTS In total, 24,472.5 person-years were analyzed. Sixteen children developed cancer, while 3.64 were expected (standardized incidence ratio (SIR) = 4.4, 95% confidence interval (CI): 2.5-7.2, p < 0.001). There was no preferred cancer type. The observed incidence of leukemia and solid tumors in trisomy 21 was only slightly higher (1 in 476 py) than expected (1 in 609 py, p = 0.64). There was no direct relationship between the radiation dose and the incidence of cancer. CONCLUSION Cardiac catherization in the first year of life was associated with a significantly increased cancer risk in a population with congenital heart disease.
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Affiliation(s)
- Heiko Stern
- German Heart Center Munich, Clinic for Pediatric Cardiology and Congenital Heart Disease, Lazarettstrasse 36, D-80636 Muenchen, Germany; (C.M.); (S.N.); (P.E.)
| | - Michael Seidenbusch
- German Research Center for Environmental Health, Institute of Radiation Protection, Ingolstaedter Landstrasse 1, D-85764 Neuherberg, Munich, Germany;
| | - Alexander Hapfelmeier
- Institute of Medical Informatics, Statistics and Epidemiology, Technical University Munich, Grillparzerstr. 18, Alexander Hapfelmeier, D-81675 Muenchen, Germany;
| | - Christian Meierhofer
- German Heart Center Munich, Clinic for Pediatric Cardiology and Congenital Heart Disease, Lazarettstrasse 36, D-80636 Muenchen, Germany; (C.M.); (S.N.); (P.E.)
| | - Susanne Naumann
- German Heart Center Munich, Clinic for Pediatric Cardiology and Congenital Heart Disease, Lazarettstrasse 36, D-80636 Muenchen, Germany; (C.M.); (S.N.); (P.E.)
| | - Irene Schmid
- Department of Pediatric Oncology and Hematology, Dr. von Hauner Childrens Hospital, Ludwig-Maximilians-University of Munich, Lindwurmstrasse 4, 80337 Muenchen, Germany;
| | - Claudia Spix
- German Childhood Cancer Registry (GCCR), Institute for Medical Biostatistics, Epidemiology and Informatics, Johannes Gutenberg-University, Obere Zahlbacher Strasse 69, 55131 Mainz, Germany;
| | - Peter Ewert
- German Heart Center Munich, Clinic for Pediatric Cardiology and Congenital Heart Disease, Lazarettstrasse 36, D-80636 Muenchen, Germany; (C.M.); (S.N.); (P.E.)
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Hoffman D, Sussman RD, Pape DM, Smilen SW, Rosenblum N, Nitti VW, Brucker BM. Radiation exposure during videourodynamic testing: Is dose reduction possible using a standardized protocol? Neurourol Urodyn 2019; 39:715-720. [PMID: 31846117 DOI: 10.1002/nau.24258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Accepted: 12/02/2019] [Indexed: 11/06/2022]
Abstract
AIMS To evaluate the impact of a protocol for standardized image capture during video urodynamics (VUD) on radiation exposure. Secondly, to categorize radiation exposure by condition warranting VUD and to identify clinical variables that correlate with increased radiation exposure. METHODS One hundred fifty patients underwent VUD using our standardized protocol. All images were taken using low dose and pulsed settings. Four images are captured: one scout image, one filling image, one voiding image, and one post-void image. If the patient is unable to void with the catheter in place, the catheter is removed and a second image is taken during an attempt at unintubated flow. If vesicoureteral reflux (VUR) is identified, an alternate protocol is entered to document parameters. The mean radiation exposure measured in dose area product (DAP), fluoroscopy time, and number of images were noted and compared with previously published fluoroscopy data collected at our institution before protocol implementation. RESULTS The mean fluoroscopy exposure after the implementation of our protocol was 273.5 mGy/cm2 taking 5.2 images in 4.5 seconds. Protocol implementation leads to a 51.2% reduction in radiation exposure calculated by mean DAP (P < .0001) and a 96.5% reduction in fluoroscopy time (P < .0001). The presence of VUR, fluoroscopy time, and body mass index (BMI) > 25 were associated with higher radiation exposure (P < .0001). CONCLUSION Implementation and adherence to a standardized protocol for fluoroscopy led to a reduction in radiation exposure fluoroscopy time. The presence of VUR, fluoroscopy time, and BMI > 25 were associated with higher radiation exposure.
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Affiliation(s)
- Daniel Hoffman
- Department of Urology, University of South Florida, Tampa, Florida
| | - Rachael D Sussman
- Department of Urology, New York University Medical Center, New York, New York
| | - Dominique M Pape
- Department of Urology, New York University Medical Center, New York, New York
| | - Scott W Smilen
- Department of Urology, New York University Medical Center, New York, New York
| | - Nirit Rosenblum
- Department of Urology, New York University Medical Center, New York, New York
| | - Victor W Nitti
- Department of Urology, Division of Female Pelvic Medicine and Reconstructive Surgery, David Geffen School of Medicine at UCLA, Los Angeles, California
| | - Benjamin M Brucker
- Department of Urology, New York University Medical Center, New York, New York
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Seibold P, Auvinen A, Averbeck D, Bourguignon M, Hartikainen JM, Hoeschen C, Laurent O, Noël G, Sabatier L, Salomaa S, Blettner M. Clinical and epidemiological observations on individual radiation sensitivity and susceptibility. Int J Radiat Biol 2019; 96:324-339. [PMID: 31539290 DOI: 10.1080/09553002.2019.1665209] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Purpose: To summarize existing knowledge and to understand individual response to radiation exposure, the MELODI Association together with CONCERT European Joint Programme has organized a workshop in March 2018 on radiation sensitivity and susceptibility.Methods: The workshop reviewed the current evidence on this matter, to inform the MELODI Strategic Research Agenda (SRA), to determine social and scientific needs and to come up with recommendations for suitable and feasible future research initiatives to be taken for the benefit of an improved medical diagnosis and treatment as well as for radiation protection.Results: The present paper gives an overview of the current evidence in this field, including potential effect modifiers such as age, gender, genetic profile, and health status of the exposed population, based on clinical and epidemiological observations.Conclusion: The authors conclude with the following recommendations for the way forward in radiation research: (a) there is need for large (prospective) cohort studies; (b) build upon existing radiation research cohorts; (c) use data from well-defined cohorts with good exposure assessment and biological material already collected; (d) focus on study quality with standardized data collection and reporting; (e) improve statistical analysis; (f) cooperation between radiobiology and epidemiology; and (g) take consequences of radiosensitivity and radiosusceptibility into account.
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Affiliation(s)
- Petra Seibold
- Division of Cancer Epidemiology, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Anssi Auvinen
- Faculty of Social Sciences, Tampere University, Tampere, Finland.,STUK - Radiation and Nuclear Safety Authority, Helsinki, Finland
| | - Dietrich Averbeck
- Commissariat à l'Energie Atomique et aux Energies Alternatives (CEA), DRF, Fontenay-aux-Roses Cedex, France
| | - Michel Bourguignon
- Department of Biophysics, Université Paris Saclay (UVSQ), Versailles, France
| | - Jaana M Hartikainen
- School of Medicine, Institute of Clinical Medicine, Pathology and Forensic Medicine, University of Eastern Finland, Kuopio, Finland.,Biobank of Eastern Finland, Kuopio University Hospital, Kuopio, Finland
| | - Christoph Hoeschen
- Faculty of Electrical Engineering and Information Technology, Otto-von-Guericke University, Magdeburg, Germany
| | - Olivier Laurent
- Laboratoire d'épidémiologie des Rayonnements Ionisants, Institut de Radioprotection et de Sûreté Nucléaire, PSE-SANTE/SESANE/LEPID, BP17, 92260, Fontenay aux Roses, France
| | - Georges Noël
- Département Universitaire de Radiothérapie, Centre Paul-Strauss, Unicancer, Strasbourg cedex, France
| | - Laure Sabatier
- Commissariat à l'Energie Atomique et aux Energies Alternatives (CEA), DRF, Fontenay-aux-Roses Cedex, France
| | - Sisko Salomaa
- Department of Environmental and Biological Sciences, University of Eastern Finland, Kuopio, Finland
| | - Maria Blettner
- Institute of Medical Biostatistics, Epidemiology and Informatics, University of Mainz, Mainz, Germany
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10
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Hong JY, Han K, Jung JH, Kim JS. Association of Exposure to Diagnostic Low-Dose Ionizing Radiation With Risk of Cancer Among Youths in South Korea. JAMA Netw Open 2019; 2:e1910584. [PMID: 31483470 PMCID: PMC6727680 DOI: 10.1001/jamanetworkopen.2019.10584] [Citation(s) in RCA: 92] [Impact Index Per Article: 18.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
IMPORTANCE Diagnostic low-dose ionizing radiation has great medical benefits; however, its increasing use has raised concerns about possible cancer risks. OBJECTIVE To examine the risk of cancer after diagnostic low-dose radiation exposure. DESIGN, SETTING, AND PARTICIPANTS This population-based cohort study included youths aged 0 to 19 years at baseline from South Korean National Health Insurance System claim records from January 1, 2006, to December 31, 2015. Exposure to diagnostic low-dose ionizing radiation was classified as any that occurred on or after the entry date, when the participant was aged 0 to 19 years, on or before the exit date, and at least 2 years before any cancer diagnosis. Cancer diagnoses were based on International Statistical Classification of Diseases and Related Health Problems, Tenth Revision codes. Data were analyzed from March 2018 to September 2018. MAIN OUTCOMES AND MEASURES The primary analysis assessed the incidence rate ratios (IRRs) for exposed vs nonexposed individuals using the number of person-years as an offset. RESULTS The cohort included a total of 12 068 821 individuals (6 339 782 [52.5%] boys). There were 2 309 841 individuals (19.1%) aged 0 to 4 years, 2 951 679 individuals (24.5%) aged 5 to 9 years, 3 489 709 individuals (28.9%) aged 10 to 14 years, and 3 317 593 individuals (27.5%) aged 15 to 19 years. Of these, 1 275 829 individuals (10.6%) were exposed to diagnostic low-dose ionizing radiation between 2006 and 2015, and 10 792 992 individuals (89.4%) were not exposed. By December 31, 2015, 21 912 cancers were recorded. Among individuals who had been exposed, 1444 individuals (0.1%) received a cancer diagnosis. The overall cancer incidence was greater among exposed individuals than among nonexposed individuals after adjusting for age and sex (IRR, 1.64 [95% CI, 1.56-1.73]; P < .001). Among individuals who had undergone computed tomography scans in particular, the overall cancer incidence was greater among exposed individuals than among nonexposed individuals after adjusting for age and sex (IRR, 1.54 [95% CI, 1.45-1.63]; P < .001). The incidence of cancer increased significantly for many types of lymphoid, hematopoietic, and solid cancers after exposure to diagnostic low-dose ionizing radiation. Among lymphoid and hematopoietic cancers, incidence of cancer increased the most for other myeloid leukemias (IRR, 2.14 [95% CI, 1.86-2.46]) and myelodysplasia (IRR, 2.48 [95% CI, 1.77-3.47]). Among solid cancers, incidence of cancer increased the most for breast (IRR, 2.32 [95% CI, 1.35-3.99]) and thyroid (IRR, 2.19 [95% CI, 1.97-2.20]) cancers. CONCLUSIONS AND RELEVANCE This study found an association of increased incidence of cancer with exposure to diagnostic low-dose ionizing radiation in a large cohort. Given this risk, diagnostic low-dose ionizing radiation should be limited to situations in which there is a definite clinical indication.
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Affiliation(s)
- Jae-Young Hong
- Division of Spinal Surgery, Department of Orthopedics, College of Medicine, Korea University, Seoul, South Korea
| | - Kyungdo Han
- Department of Biostatistics, College of Medicine, Catholic University, Seoul, South Korea
| | - Jin-Hyung Jung
- Department of Biostatistics, College of Medicine, Catholic University, Seoul, South Korea
| | - Jung Sun Kim
- Division of Hematology/Oncology, Department of Internal Medicine, College of Medicine, Korea University, Seoul, South Korea
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11
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Massalha S, Almufleh A, Small G, Marvin B, Keidar Z, Israel O, Kennedy JA. Strategies for Minimizing Occupational Radiation Exposure in Cardiac Imaging. Curr Cardiol Rep 2019; 21:71. [PMID: 31227929 DOI: 10.1007/s11886-019-1157-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
PURPOSE OF REVIEW Radiation safety has been at the center of interest of both researchers and healthcare institutions. This review will summarize and shed light on the various techniques adapted to reduce staff exposure to ionizing radiation (IR) in the field of cardiac imaging. RECENT FINDINGS In the last years, with the advance of awareness and the development of new technologies, there have been several tools and techniques adapted. The breakthrough of several technologies to lower radiation dose and shorten the duration of diagnostic tests associated with IR, the use of protection devices by staff members, and mostly the awareness of exposure to IR are the hallmark of these advances. Using all these measures has led to a significant decrease in staff exposure to IR. Reducing staff exposure to meet the "As Low As Reasonably Achievable" principle is feasible. This review introduces the most important strategies applied in cardiac imaging.
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Affiliation(s)
- Samia Massalha
- Department of Medicine (Cardiology), University of Ottawa Heart Institute, 40 Ruskin Street, Ottawa, Ontario, K1Y 4W7, Canada. .,Department of Cardiology, Rambam Health Care Campus, Haifa, Israel. .,Department of Nuclear Medicine, Rambam Health Care Campus, Haifa, Israel.
| | - Aws Almufleh
- Department of Medicine (Cardiology), University of Ottawa Heart Institute, 40 Ruskin Street, Ottawa, Ontario, K1Y 4W7, Canada
| | - Garry Small
- Department of Medicine (Cardiology), University of Ottawa Heart Institute, 40 Ruskin Street, Ottawa, Ontario, K1Y 4W7, Canada
| | - Brian Marvin
- Department of Medicine (Cardiology), University of Ottawa Heart Institute, 40 Ruskin Street, Ottawa, Ontario, K1Y 4W7, Canada
| | - Zohar Keidar
- Department of Nuclear Medicine, Rambam Health Care Campus, Haifa, Israel
| | - Ora Israel
- Department of Nuclear Medicine, Rambam Health Care Campus, Haifa, Israel.,Rappaport Faculty of Medicine, Technion - Israel Institute of Technology, Haifa, Israel
| | - John A Kennedy
- Department of Nuclear Medicine, Rambam Health Care Campus, Haifa, Israel.,Faculty of Biomedical Engineering, Technion - Israel Institute of Technology, Haifa, Israel
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12
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Mitra B, El-Menyar A, Mercier E, Liew S, Varma D, Fitzgerald MC, Al-Hilli S, Peralta R, Al-Thani H, Cameron PA. Clinical clearance of the thoracic and lumbar spine: a pilot study. ANZ J Surg 2019; 89:718-722. [PMID: 31083786 DOI: 10.1111/ans.15253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Revised: 03/21/2019] [Accepted: 03/27/2019] [Indexed: 11/28/2022]
Abstract
BACKGROUND In patients who are awake with normal mental and neurologic status, it has been suggested that the thoracolumbar (TL) spine may be cleared by clinical examination, irrespective of the mechanism of injury. The aim of this pilot study was to test the feasibility and accuracy of a clinical decision tool focused towards clearance of the TL spine during assessment of patients in the emergency department after trauma. METHODS A prospective interventional study was conducted at two major trauma centres. The intervention of a clinical decision tool for assessment of the TL spine was applied prospectively to all patients with subsequent imaging results acting as the comparator. The primary outcome variable was fracture of the thoracic or lumbar vertebra(e). The clinical decision tool was assessed using sensitivity and specificity for detecting a TL fracture and reported with 95% confidence intervals (CIs). RESULTS There were 188 cases included for analysis that all underwent imaging of the thoracic and/or lumbar vertebrae. There were 34 (18%) patients diagnosed with fractures of the thoracic and/or lumbar vertebrae. In this pilot study, sensitivity of the clinical decision tool was 100% (95% CI 87.3-100%) and specificity was 37.0% (95% CI 29.5-45.2%) for the detection of a thoracic or lumbar vertebral fracture. CONCLUSIONS Feasibility of clinical clearance of the TL spine in two major trauma centres was demonstrated in a clinical study setting. Evaluation of this clinical decision tool in patients following blunt trauma, particularly in reducing imaging rates, is indicated using a larger prospective study.
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Affiliation(s)
- Biswadev Mitra
- Emergency and Trauma Centre, The Alfred Hospital, Melbourne, Victoria, Australia.,Department of Epidemiology and Preventive Medicine, Monash University, Melbourne, Victoria, Australia.,National Trauma Research Institute, The Alfred Hospital, Melbourne, Victoria, Australia
| | - Ayman El-Menyar
- Department of Surgery, Trauma and Vascular Surgery, Hamad Medical Corporation, Doha, Qatar.,Clinical Medicine, Weill Cornell Medical College, Doha, Qatar
| | - Eric Mercier
- CHU de Québec-Université Laval Research Center, Population Health and Optimal Health Practices, Université Laval, Québec, Canada.,Département de Médecine Familiale et Médecine d'Urgence, Faculté de Médecine, Université Laval, Québec, Canada.,Centre de Recherche Sur Les Soins Et Les Services De Première Ligne De l'Université Laval, Québec, Canada
| | - Susan Liew
- Department of Orthopaedic Surgery, The Alfred Hospital, Melbourne, Victoria, Australia
| | - Dinesh Varma
- Department of Radiology, The Alfred Hospital, Melbourne, Victoria, Australia.,Department of Surgery, Central Clinical School, Monash University, Melbourne, Victoria, Australia
| | - Mark C Fitzgerald
- National Trauma Research Institute, The Alfred Hospital, Melbourne, Victoria, Australia.,Department of Surgery, Central Clinical School, Monash University, Melbourne, Victoria, Australia.,Trauma Service, The Alfred Hospital, Melbourne, Victoria, Australia
| | - Shatha Al-Hilli
- Department of Radiology, Hamad General Hospital, Doha, Qatar
| | - Ruben Peralta
- Department of Surgery, Trauma and Vascular Surgery, Hamad Medical Corporation, Doha, Qatar.,Department of Surgery, Trauma Surgery, Hamad Medical Corporation, Doha, Qatar
| | - Hassan Al-Thani
- Department of Surgery, Trauma and Vascular Surgery, Hamad Medical Corporation, Doha, Qatar
| | - Peter A Cameron
- Emergency and Trauma Centre, The Alfred Hospital, Melbourne, Victoria, Australia.,Department of Epidemiology and Preventive Medicine, Monash University, Melbourne, Victoria, Australia.,National Trauma Research Institute, The Alfred Hospital, Melbourne, Victoria, Australia
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13
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Abstract
The use of diagnostic medical imaging is becoming increasingly more commonplace in the pediatric setting. However, many medical imaging modalities expose pediatric patients to ionizing radiation, which has been shown to increase the risk of cancer development in later life. This review article provides a comprehensive overview of the available data regarding the risk of cancer development following exposure to ionizing radiation from diagnostic medical imaging. Attention is paid to modalities such as computed tomography scans and fluoroscopic procedures that can expose children to radiation doses orders of magnitude higher than standard diagnostic x-rays. Ongoing studies that seek to more precisely determine the relationship of diagnostic medical radiation in children and subsequent cancer development are discussed, as well as modern strategies to better quantify this risk. Finally, as cardiovascular imaging and intervention contribute substantially to medical radiation exposure, we discuss strategies to enhance radiation safety in these areas.
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14
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DeSimone AK, Post A, Duszak R, Duong PAT. Radiology Trainee vs Faculty Radiologist Fluoroscopy Time for Imaging-Guided Procedures: A Retrospective Study of 17,966 Reports Over a 5.5-Year Period. Curr Probl Diagn Radiol 2017; 47:233-237. [PMID: 28797716 DOI: 10.1067/j.cpradiol.2017.07.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2017] [Revised: 06/26/2017] [Accepted: 07/05/2017] [Indexed: 12/18/2022]
Abstract
To evaluate differences in fluoroscopy time (FT) for common vascular access and gastrointestinal procedures performed by radiology trainees vs faculty radiologists. Report information was extracted for all 17,966 index fluoroscopy services performed by trainees or faculty, or both from 2 university hospitals over 66 months. Various vascular access procedures (eg, peripherally inserted central catheters [PICCs] and ports) and gastrointestinal fluoroscopy procedures (eg, upper gastrointestinal and contrast enema studies) were specifically targeted. Statistical analysis was performed. FT was recorded in 17,549 of 17,966 reports (98%) The 1393 procedures performed by nonphysician providers or transitional year interns were excluded. Residents, fellows, and faculty were primary operators in 5066, 6489, and 4601 procedures, respectively. Average FT (in seconds) for resident and fellow services, respectively, was less than that of faculty only for PICCs (75 and 101 vs 148, P < 0.01). For all other procedures, average FT of trainee services was greater than that for faculty. This was statistically significant (P < 0.05) for fellows vs faculty port placement (121 vs 87), resident vs faculty small bowel series (130 vs 96), and both resident and fellow vs faculty esophagram procedures (143 and 183 vs 126 ). FT for residents was significantly less than that for fellows only for PICCs (75 vs 101, P < 0.01). For most, but not all, fluoroscopy procedures commonly performed by radiology trainees, FT is greater than that for procedures performed by faculty radiologists. Better awareness and understanding of such differences may aid training programs in developing benchmarks, protocols, and focused teaching in the safe use of fluoroscopy for patients and operators.
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Affiliation(s)
- Ariadne K DeSimone
- Department of Medicine, Emory University School of Medicine, Atlanta, GA
| | - Andrew Post
- Department of Radiology and Imaging Sciences, Emory University School of Medicine, Atlanta, GA; Department of Biomedical Informatics, Emory University School of Medicine, Atlanta, GA
| | - Richard Duszak
- Department of Radiology and Imaging Sciences, Emory University School of Medicine, Atlanta, GA
| | - Phuong-Anh T Duong
- Department of Radiology and Imaging Sciences, Emory University School of Medicine, Atlanta, GA.
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15
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Vitola JV, Mut F, Alexánderson E, Pascual TNB, Mercuri M, Karthikeyan G, Better N, Rehani MM, Kashyap R, Dondi M, Paez D, Einstein AJ. Opportunities for improvement on current nuclear cardiology practices and radiation exposure in Latin America: Findings from the 65-country IAEA Nuclear Cardiology Protocols cross-sectional Study (INCAPS). J Nucl Cardiol 2017; 24:851-859. [PMID: 26902484 DOI: 10.1007/s12350-016-0433-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2015] [Revised: 01/07/2016] [Indexed: 10/22/2022]
Abstract
BACKGROUND Comparison of Latin American (LA) nuclear cardiology (NC) practice with that in the rest of the world (RoW) will identify areas for improvement and lead to educational activities to reduce radiation exposure from NC. METHODS AND RESULTS INCAPS collected data on all SPECT and PET procedures performed during a single week in March-April 2013 in 36 laboratories in 10 LA countries (n = 1139), and 272 laboratories in 55 countries in RoW (n = 6772). Eight "best practices" were identified a priori and a radiation-related Quality Index (QI) was devised indicating the number used. Mean radiation effective dose (ED) in LA was higher than in RoW (11.8 vs 9.1 mSv, p < 0.001). Within a populous country like Brazil, a wide variation in laboratory mean ED was found, ranging from 8.4 to 17.8 mSv. Only 11% of LA laboratories achieved median ED <9 mSv, compared to 32% in RoW (p < 0.001). QIs ranged from 2 in a laboratory in Mexico to 7 in a laboratory in Cuba. Three major opportunities to reduce ED for LA patients were identified: (1) more laboratories could implement stress-only imaging, (2) camera-based methods of ED reduction, including prone imaging, could be more frequently used, and (3) injected activity of 99mTc could be adjusted reflecting patient weight/habitus. CONCLUSIONS On average, radiation dose from NC is higher in LA compared to RoW, with median laboratory ED <9 mSv achieved only one third as frequently as in RoW. Opportunities to reduce radiation exposure in LA have been identified and guideline-based recommendations made to optimize protocols and adhere to the "as low as reasonably achievable" (ALARA) principle.
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Affiliation(s)
| | - Fernando Mut
- Departamento de Medicina Nuclear, Asociación Española, Montevideo, Uruguay
| | - Erick Alexánderson
- Departamento de Cardiología Nuclear, Instituto Nacional de Cardiología "Ignacio Chávez", Mexico, Mexico
| | - Thomas N B Pascual
- Section of Nuclear Medicine and Diagnostic Imaging, Division of Human Health, International Atomic Energy Agency, Vienna, Austria
| | - Mathew Mercuri
- Division of Cardiology, Department of Medicine, Columbia University Medical Center and New York-Presbyterian Hospital, 622 West 168th Street PH 10-203, New York, NY, 10032, USA
| | - Ganesan Karthikeyan
- Department of Cardiology, All India Institute of Medical Sciences, New Delhi, India
| | - Nathan Better
- Department of Nuclear Medicine, Royal Melbourne Hospital and University of Melbourne, Parkville, Australia
| | - Madan M Rehani
- Radiation Protection of Patients Unit, International Atomic Energy Agency, Vienna, Austria
- Harvard Medical School, Massachusetts General Hospital, Boston, MA, USA
| | - Ravi Kashyap
- Section of Nuclear Medicine and Diagnostic Imaging, Division of Human Health, International Atomic Energy Agency, Vienna, Austria
| | - Maurizio Dondi
- Section of Nuclear Medicine and Diagnostic Imaging, Division of Human Health, International Atomic Energy Agency, Vienna, Austria
| | - Diana Paez
- Section of Nuclear Medicine and Diagnostic Imaging, Division of Human Health, International Atomic Energy Agency, Vienna, Austria
| | - Andrew J Einstein
- Division of Cardiology, Department of Medicine, Columbia University Medical Center and New York-Presbyterian Hospital, 622 West 168th Street PH 10-203, New York, NY, 10032, USA.
- Department of Radiology, Columbia University Medical Center and New York-Presbyterian Hospital, New York, NY, USA.
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16
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Whitehead TP, Metayer C, Wiemels JL, Singer AW, Miller MD. Childhood Leukemia and Primary Prevention. Curr Probl Pediatr Adolesc Health Care 2016; 46:317-352. [PMID: 27968954 PMCID: PMC5161115 DOI: 10.1016/j.cppeds.2016.08.004] [Citation(s) in RCA: 71] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Leukemia is the most common pediatric cancer, affecting 3800 children per year in the United States. Its annual incidence has increased over the last decades, especially among Latinos. Although most children diagnosed with leukemia are now cured, many suffer long-term complications, and primary prevention efforts are urgently needed. The early onset of leukemia-usually before 5 years of age-and the presence at birth of "pre-leukemic" genetic signatures indicate that pre- and postnatal events are critical to the development of the disease. In contrast to most pediatric cancers, there is a growing body of literature-in the United States and internationally-that has implicated several environmental, infectious, and dietary risk factors in the etiology of childhood leukemia, mainly for acute lymphoblastic leukemia, the most common subtype. For example, exposures to pesticides, tobacco smoke, solvents, and traffic emissions have consistently demonstrated positive associations with the risk of developing childhood leukemia. In contrast, intake of vitamins and folate supplementation during the preconception period or pregnancy, breastfeeding, and exposure to routine childhood infections have been shown to reduce the risk of childhood leukemia. Some children may be especially vulnerable to these risk factors, as demonstrated by a disproportionate burden of childhood leukemia in the Latino population of California. The evidence supporting the associations between childhood leukemia and its risk factors-including pooled analyses from around the world and systematic reviews-is strong; however, the dissemination of this knowledge to clinicians has been limited. To protect children's health, it is prudent to initiate programs designed to alter exposure to well-established leukemia risk factors rather than to suspend judgment until no uncertainty remains. Primary prevention programs for childhood leukemia would also result in the significant co-benefits of reductions in other adverse health outcomes that are common in children, such as detriments to neurocognitive development.
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Affiliation(s)
- Todd P Whitehead
- Department of Epidemiology, School of Public Health, University of California, Berkeley, CA; Center for Integrative Research on Childhood Leukemia and the Environment, University of California, Berkeley, CA.
| | - Catherine Metayer
- Department of Epidemiology, School of Public Health, University of California, Berkeley, CA; Center for Integrative Research on Childhood Leukemia and the Environment, University of California, Berkeley, CA
| | - Joseph L Wiemels
- Center for Integrative Research on Childhood Leukemia and the Environment, University of California, Berkeley, CA; Department of Epidemiology and Biostatistics, School of Medicine, University of California, San Francisco, CA
| | - Amanda W Singer
- Department of Epidemiology, School of Public Health, University of California, Berkeley, CA
| | - Mark D Miller
- Center for Integrative Research on Childhood Leukemia and the Environment, University of California, Berkeley, CA; Western States Pediatric Environmental Health Specialty Unit, University of California, San Francisco, CA
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17
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Soman P, Einstein AJ. Biologic effects of radiation from cardiac imaging: New insights from proteomic and genomic analyses. J Nucl Cardiol 2016; 23:754-7. [PMID: 27151300 DOI: 10.1007/s12350-016-0517-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2016] [Accepted: 03/31/2016] [Indexed: 01/24/2023]
Affiliation(s)
- Prem Soman
- Division of Cardiology, University of Pittsburgh Medical Center, A-429 Scaife Hall, 200 Lothrop Street, Pittsburgh, PA, 15213, USA.
| | - Andrew J Einstein
- Division of Cardiology, Department of Medicine, and Department of Radiology, Columbia University Medical Center and New York-Presbyterian Hospital, New York, NY, USA
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18
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Kitahara CM, Linet MS, Rajaraman P, Ntowe E, Berrington de González A. A New Era of Low-Dose Radiation Epidemiology. Curr Environ Health Rep 2016; 2:236-49. [PMID: 26231501 DOI: 10.1007/s40572-015-0055-y] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
The last decade has introduced a new era of epidemiologic studies of low-dose radiation facilitated by electronic record linkage and pooling of cohorts that allow for more direct and powerful assessments of cancer and other stochastic effects at doses below 100 mGy. Such studies have provided additional evidence regarding the risks of cancer, particularly leukemia, associated with lower-dose radiation exposures from medical, environmental, and occupational radiation sources, and have questioned the previous findings with regard to possible thresholds for cardiovascular disease and cataracts. Integrated analysis of next generation genomic and epigenetic sequencing of germline and somatic tissues could soon propel our understanding further regarding disease risk thresholds, radiosensitivity of population subgroups and individuals, and the mechanisms of radiation carcinogenesis. These advances in low-dose radiation epidemiology are critical to our understanding of chronic disease risks from the burgeoning use of newer and emerging medical imaging technologies, and the continued potential threat of nuclear power plant accidents or other radiological emergencies.
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Affiliation(s)
- Cari M Kitahara
- Radiation Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, 9609 Medical Center Drive, Rm 7E566, Rockville, MD, 20850, USA,
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19
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Smookler G, Deavenport-Saman A. Retrospective study of cumulative diagnostic radiation exposure during childhood in patients with spina bifida. Disabil Health J 2015; 8:642-5. [DOI: 10.1016/j.dhjo.2015.04.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2015] [Revised: 04/09/2015] [Accepted: 04/11/2015] [Indexed: 11/16/2022]
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20
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Lee JH, Kim K, Lee KH, Kim KP, Kim YJ, Park C, Kang C, Lee SH, Jeong JH, Rhee JE. Perception of radiation dose and potential risks of computed tomography in emergency department medical personnel. Clin Exp Emerg Med 2015; 2:123-129. [PMID: 27752583 PMCID: PMC5052866 DOI: 10.15441/ceem.14.019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2014] [Revised: 08/22/2014] [Accepted: 09/17/2014] [Indexed: 01/21/2023] Open
Abstract
Objective Use of computed tomography (CT) continues to increase, but the relatively high radiation doses associated with CT have raised health concerns such as future risk of cancer. We investigated the level of awareness regarding radiation doses and possible risks associated with CT in medical personnel (MP). Methods This study was conducted from April to May 2012 and included physicians and nurses who worked in the emergency department of 17 training hospitals. The questionnaire included measurement of the effect of CT or radiography on health using a 10-point numerical rating scale, estimation of the radiation dose of one abdominal CT scan compared with one chest radiograph, and perception of the increased lifetime risk of cancer associated with CT. Results A total of 354 MP participated in this study: 142 nurses, 87 interns, 86 residents, and 39 specialists. Interns were less aware of the effects of CT or radiography on health than other physicians or nurses (mean±SD of 4.8±2.7, 5.9±2.7, 6.1±2.7, and 6.0±2.2 for interns, residents, specialists, and nurses, respectively; P<0.05). There was a significant difference in knowledge about the relative radiation dose of one abdominal CT scan compared with one chest radiograph between physicians and nurses (48.6% vs. 28.9% for physicians vs. nurses, P<0.05). MP perceived an increased risk of cancer from radiation associated with CT. Conclusion MP perceive the risk of radiation associated with CT, but their level of knowledge seems to be insufficient.
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Affiliation(s)
- Jin Hee Lee
- Department of Emergency Medicine, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea
| | - Kyuseok Kim
- Department of Emergency Medicine, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea
| | - Kyoung Ho Lee
- Department of Radiology, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea
| | - Kwang Pyo Kim
- Department of Nuclear Engineering, Kyung Hee University, Yongin, Korea
| | - Yu Jin Kim
- Department of Emergency Medicine, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea
| | - Chanjong Park
- Department of Emergency Medicine, Veterans Health Service Medical Center, Seoul, Korea
| | - Changwoo Kang
- Department of Emergency Medicine, Gyeongsang National University Hospital, Jinju, Korea
| | - Soo Hoon Lee
- Department of Emergency Medicine, Gyeongsang National University Hospital, Jinju, Korea
| | - Jin Hee Jeong
- Department of Emergency Medicine, Gyeongsang National University Hospital, Jinju, Korea
| | - Joong Eui Rhee
- Department of Emergency Medicine, Samsung Medical Center, Seoul, Korea
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21
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Armao DM, Smith JK, Semelka RC. Debriefing the Brief: It is Time for the Provision of Informed Consent before Pediatric CT. Radiology 2015; 275:326-30. [DOI: 10.1148/radiol.2015142860] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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22
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Hill KD, Einstein AJ. New approaches to reduce radiation exposure. Trends Cardiovasc Med 2015; 26:55-65. [PMID: 25962784 DOI: 10.1016/j.tcm.2015.04.005] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/23/2014] [Revised: 04/04/2015] [Accepted: 04/07/2015] [Indexed: 12/20/2022]
Abstract
Exposure to ionizing radiation is associated with a long-term risk of health effects, including cancer. Radiation exposure to the U.S. population from cardiac imaging has increased markedly over the past three decades. Initiatives to reduce radiation exposure have focused on the tenets of appropriate study "justification" and "optimization" of imaging protocols. This article reviews ways to optimally reduce radiation dose across the spectrum of cardiac imaging.
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Affiliation(s)
- Kevin D Hill
- Division of Pediatric Cardiology, Duke Clinical Research Institute, Duke University Medical Center, Durham, NC.
| | - Andrew J Einstein
- Division of Cardiology, Department of Medicine, Columbia University Medical Center, New York-Presbyterian Hospital, New York, NY; Department of Radiology, Columbia University Medical Center, New York-Presbyterian Hospital, New York, NY
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23
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Abstract
Recent record-linkage studies of cancer risk following computed tomography (CT) procedures among children and adolescents under 21 years of age must be interpreted with caution. The reasons why the examinations were performed were not known, and the dosimetric approaches did not include individual dose reconstructions or account for the possibility for missed examinations. The recent report (2013) on children by the United Nations Scientific Committee on the Effects of Atomic Radiation concluded that the associations may have resulted from confounding by indication (also called 'reverse causation'), and not radiation exposure. The reported cancer associations may very well have been related to the patients' underlying health conditions that prompted the examinations. Reverse causation has been observed in other epidemiological investigations, such as a Swedish study of thyroid cancer risk following I-131 scintillation imaging scans, and in studies of brain cancer risk following Thorotrast for cerebral angiography. Epidemiological patterns reported in the CT studies were also inconsistent with the world's literature. For example, in a UK study, teenagers had a higher risk of brain tumour than young children; in an Australian study, cancers not previously linked to radiation were significantly elevated; and in a Taiwanese study, the risk of benign tumours decreased with age at the time of CT examination. In all studies, solid tumours appeared much earlier than previously reported. Remarkably, in the Australian study, brain cancer excesses were seen regardless of whether or not the CT was to the head, i.e. a significant excess was reported for CT examinations of the abdomen and extremities, which involved no radiation exposure to the brain. In the UK study, the significance of the 'leukaemia' finding was only because myelodysplastic syndrome was added to the category, and there was no significance for leukaemia alone. Without knowledge of why CT examinations were performed, any future studies will be equally difficult to interpret. It is noteworthy that two recent studies of children in France and Germany found no significant excess cancer risk from CT scans once adjustment was made for conditions that prompted the scan, family history, or other predisposing factors known to be associated with increased cancer risk. Nonetheless, such studies have heightened awareness of these relatively high-dose diagnostic procedures, and the need to reduce unnecessary examinations and lower the dose per examination commensurate with the desired image quality.
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Affiliation(s)
- J D Boice
- Department of Medicine and Vanderbilt-Ingram Cancer Centre, Vanderbilt University School of Medicine, Vanderbilt University, Nashville, TN 37232, USA
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Toth G, Ntalianis A, Ntarladimas Y, de Booij M, De Winter O, Barbato E, Pilet B, Van Mieghem C, Wijns W, De Bruyne B. Effective radiation doses associated with non-invasive versus invasive assessment of coronary anatomy and physiology. Catheter Cardiovasc Interv 2014; 85:1173-81. [DOI: 10.1002/ccd.25729] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/15/2014] [Accepted: 11/03/2014] [Indexed: 01/10/2023]
Affiliation(s)
- G.G. Toth
- Cardiovascular Centre; OLV Clinic; Aalst Belgium
| | - A. Ntalianis
- Cardiovascular Centre; OLV Clinic; Aalst Belgium
| | | | - M. de Booij
- Cardiovascular Centre; OLV Clinic; Aalst Belgium
| | - O. De Winter
- Cardiovascular Centre; OLV Clinic; Aalst Belgium
| | - E. Barbato
- Cardiovascular Centre; OLV Clinic; Aalst Belgium
| | - B. Pilet
- Cardiovascular Centre; OLV Clinic; Aalst Belgium
| | | | - W. Wijns
- Cardiovascular Centre; OLV Clinic; Aalst Belgium
| | - B. De Bruyne
- Cardiovascular Centre; OLV Clinic; Aalst Belgium
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Westra SJ. The communication of the radiation risk from CT in relation to its clinical benefit in the era of personalized medicine: part 1: the radiation risk from CT. Pediatr Radiol 2014; 44 Suppl 3:515-8. [PMID: 25304714 DOI: 10.1007/s00247-014-3139-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/04/2014] [Revised: 04/29/2014] [Accepted: 07/18/2014] [Indexed: 11/25/2022]
Abstract
The theory of radiation carcinogenesis has been debated for decades. Most estimates of the radiation risks from CT have been based on extrapolations from the lifespan follow-up study of atomic bomb survivors and on follow-up studies after therapeutic radiation, using the linear no-threshold theory. Based on this, many population-based projections of induction of future cancers by CT have been published that should not be used to estimate the risk to an individual because of their large margin of error. This has changed recently with the publication of three large international cohort follow-up studies, which link observed cancers to CT scans received in childhood. A fourth ongoing multi-country study in Europe is expected to have enough statistical power to address the limitations of the prior studies. The United Nations Scientific Committee on the Effects of Atomic Radiation (UNSCEAR) report released in 2013 specifically addresses variability in response of the pediatric population exposed to ionizing radiation. Most authorities now conclude that there is enough evidence to link future cancers to the radiation exposure from a single CT scan in childhood but that cancer risk estimates for individuals must be based on the specifics of exposure, age at exposure and absorbed dose to certain tissues. Generalizations are not appropriate, and the communication of the CT risk to individuals should be conducted within the framework of personalized medicine.
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Affiliation(s)
- Sjirk J Westra
- Division of Pediatric Radiology, Massachusetts General Hospital, 34 Fruit St., White 246A, Boston, MA, 02114, USA,
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Fazel R, Gerber TC, Balter S, Brenner DJ, Carr JJ, Cerqueira MD, Chen J, Einstein AJ, Krumholz HM, Mahesh M, McCollough CH, Min JK, Morin RL, Nallamothu BK, Nasir K, Redberg RF, Shaw LJ. Approaches to enhancing radiation safety in cardiovascular imaging: a scientific statement from the American Heart Association. Circulation 2014; 130:1730-48. [PMID: 25366837 DOI: 10.1161/cir.0000000000000048] [Citation(s) in RCA: 91] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Education, justification, and optimization are the cornerstones to enhancing the radiation safety of medical imaging. Education regarding the benefits and risks of imaging and the principles of radiation safety is required for all clinicians in order for them to be able to use imaging optimally. Empowering patients with knowledge of the benefits and risks of imaging will facilitate their meaningful participation in decisions related to their health care, which is necessary to achieve patient-centered care. Limiting the use of imaging to appropriate clinical indications can ensure that the benefits of imaging outweigh any potential risks. Finally, the continually expanding repertoire of techniques that allow high-quality imaging with lower radiation exposure should be used when available to achieve safer imaging. The implementation of these strategies in practice is necessary to achieve high-quality, patient-centered imaging and will require a shared effort and investment by all stakeholders, including physicians, patients, national scientific and educational organizations, politicians, and industry.
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Shuryak I, Lubin JH, Brenner DJ. Potential for adult-based epidemiological studies to characterize overall cancer risks associated with a lifetime of CT scans. Radiat Res 2014; 181:584-91. [PMID: 24828111 DOI: 10.1667/rr13622.1] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Recent epidemiological studies have suggested that radiation exposure from pediatric CT scanning is associated with small excess cancer risks. However, the majority of CT scans are performed on adults, and most radiation-induced cancers appear during middle or old age, in the same age range as background cancers. Consequently, a logical next step is to investigate the effects of CT scanning in adulthood on lifetime cancer risks by conducting adult-based, appropriately designed epidemiological studies. Here we estimate the sample size required for such studies to detect CT-associated risks. This was achieved by incorporating different age-, sex-, time- and cancer type-dependent models of radiation carcinogenesis into an in silico simulation of a population-based cohort study. This approach simulated individual histories of chest and abdominal CT exposures, deaths and cancer diagnoses. The resultant sample sizes suggest that epidemiological studies of realistically sized cohorts can detect excess lifetime cancer risks from adult CT exposures. For example, retrospective analysis of CT exposure and cancer incidence data from a population-based cohort of 0.4 to 1.3 million (depending on the carcinogenic model) CT-exposed UK adults, aged 25-65 in 1980 and followed until 2015, provides 80% power for detecting cancer risks from chest and abdominal CT scans.
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Affiliation(s)
- Igor Shuryak
- a Center for Radiological Research, Columbia University Medical Center, New York, New York; and
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Systematic review of the benefits and harms of whole-body computed tomography in the early management of multitrauma patients: are we getting the whole picture? J Trauma Acute Care Surg 2014; 76:1122-30. [PMID: 24662881 DOI: 10.1097/ta.0000000000000178] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
BACKGROUND There is considerable interest in whether routine whole-body computed tomography (WBCT) imaging produces different patient outcomes in blunt trauma patients when compared with selective imaging. This article aimed to systematically review the literature for all outcomes measured in comparing WBCT with selective imaging in trauma patients and to evaluate the comprehensiveness of relevant dimensions for this comparison. METHODS We performed a systematic review of studies comparing WBCT and selective imaging approaches during the initial assessment of multitrauma patients. Peer-reviewed studies including cohort studies, randomized controlled trials, meta-analyses, and systematic reviews were identified through large database searches and filtered through methodologic inclusion criteria. Data on study characteristics, hypotheses and conclusions made, outcomes assessed, and references to potential benefits and harms were extracted. RESULTS Eight retrospective cohort studies and two systematic reviews were identified. Six primary studies evaluated mortality as an outcome, and four studies found a significant difference in results favoring WBCT imaging over selective imaging. All five articles assessing various time intervals in hospital following imaging after injury found significantly reduced times with WBCT. Radiation exposure was found to be increased after WBCT imaging compared with selective imaging in the only study in which it was evaluated. The two systematic reviews analyzed the same three articles with regard to mortality but concluded differently about overall benefits. CONCLUSION WBCT imaging seems to be associated with reduced times to events in hospital following traumatic injury and seems to be associated with decreased mortality. Whether this is a true effect mediated through an as yet unsubstantiated change in management or the result of hospital- or individual-level confounders is unclear. When evaluating these outcomes, it seems that the authors of both primary studies and systematic reviews have often been selective in their choice of short-term outcomes, painting an incomplete picture of the issue. LEVEL OF EVIDENCE Systematic review, level III.
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Xu BJ, Duszak R, McGinnis RS, Stanfill JG, O'Rear J, An AQ. Increased fluoroscopy time for central venous catheter placement by radiology residents versus staff radiologists. J Am Coll Radiol 2014; 10:518-22. [PMID: 23827004 DOI: 10.1016/j.jacr.2012.12.023] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2012] [Accepted: 12/14/2012] [Indexed: 10/26/2022]
Abstract
PURPOSE To evaluate differences in interventional radiology procedural fluoroscopy time (FT) for radiology residents versus staff radiologists, using central venous catheter (CVC) placement as an index service. METHODS To minimize interservice and complexity variables, stand-alone temporary internal jugular CVC procedures were targeted for analysis. Reports and images from 1,067 temporary CVC services from 2 hospitals over 2 years were reviewed as part of a quality improvement initiative. Insertion site, catheter type (eg, smaller triple lumen versus larger hemodialysis), resident identifier, staff identifier, and documented FT were compiled and analyzed. RESULTS Applying clinical (eg, concomitant venous angioplasty) and anatomic (eg, femoral access) exclusions, 537 cases with complete CVC procedure records were available for analysis. Radiology residents and staff radiologists were primary operators in 128 and 409 procedures, respectively. Distribution of resident procedures (82% right, 66% large lumen) was similar to that of staff (79% right, 63% large lumen). Mean FT of resident services was twice as long as that of staff services (1.24 minutes versus 0.63 minutes, P < .0001). Resident FT was independent of supervising staff radiologist. Increasing years of training for residents did not significantly reduce FT. CONCLUSIONS When CVCs are placed by radiology residents, FT is double that for identical procedures performed by staff radiologists. Similar discrepancies likely exist for other interventional radiologic procedures. Residency training programs should initiate measures to monitor and manage fluoroscopy during interventional procedures to minimize radiation dose to patients, trainees, and other staff.
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Affiliation(s)
- Baogang J Xu
- University of Tennessee Health Science Center, Memphis, Tennessee 38163, USA.
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30
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Abstract
Many assumptions are made when imaging children. In particular a judgement is made regarding how safe or unsafe each imaging modality is, using relatively arbitrary definitions and distinctions, due to the lack of robust scientific data. Here, the latest evidence is reviewed, particularly regarding the medical exposure to ionizing radiation (X-rays and CT) and MRI in childhood. The best evidence currently available suggests a small but convincing risk of cumulative low-dose ionizing radiation in children. Given our predictions for the children imaged today, it seems reasonable to pursue non-ionizing-based techniques wherever possible, although there is emerging evidence that MRI and ultrasound may have hitherto unknown effects. As our knowledge base expands, we must continually review our practice in light of the latest scientific data.
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Affiliation(s)
| | - Alvhild Alette Bj⊘rkum
- Departments of Biomedical Laboratory
Sciences and Chemical Engineering, Faculty of Engineering, Bergen University
College, Bergen, Norway
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31
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Cohen M. Cancer risks from CT radiation: is there a dose threshold? J Am Coll Radiol 2013; 10:817-9. [PMID: 24044952 DOI: 10.1016/j.jacr.2013.03.029] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2013] [Accepted: 03/01/2013] [Indexed: 11/16/2022]
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Orchard JJ, Orchard JW, Grenfell T, Mitchell A. Ionising radiation: three game-changing studies for imaging in sports medicine. Br J Sports Med 2013; 48:677-8. [DOI: 10.1136/bjsports-2013-092499] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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35
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Mathews JD, Forsythe AV, Brady Z, Butler MW, Goergen SK, Byrnes GB, Giles GG, Wallace AB, Anderson PR, Guiver TA, McGale P, Cain TM, Dowty JG, Bickerstaffe AC, Darby SC. Cancer risk in 680,000 people exposed to computed tomography scans in childhood or adolescence: data linkage study of 11 million Australians. BMJ 2013; 346:f2360. [PMID: 23694687 PMCID: PMC3660619 DOI: 10.1136/bmj.f2360] [Citation(s) in RCA: 1317] [Impact Index Per Article: 119.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
OBJECTIVE To assess the cancer risk in children and adolescents following exposure to low dose ionising radiation from diagnostic computed tomography (CT) scans. DESIGN Population based, cohort, data linkage study in Australia. COHORT MEMBERS: 10.9 million people identified from Australian Medicare records, aged 0-19 years on 1 January 1985 or born between 1 January 1985 and 31 December 2005; all exposures to CT scans funded by Medicare during 1985-2005 were identified for this cohort. Cancers diagnosed in cohort members up to 31 December 2007 were obtained through linkage to national cancer records. MAIN OUTCOME Cancer incidence rates in individuals exposed to a CT scan more than one year before any cancer diagnosis, compared with cancer incidence rates in unexposed individuals. RESULTS 60,674 cancers were recorded, including 3150 in 680,211 people exposed to a CT scan at least one year before any cancer diagnosis. The mean duration of follow-up after exposure was 9.5 years. Overall cancer incidence was 24% greater for exposed than for unexposed people, after accounting for age, sex, and year of birth (incidence rate ratio (IRR) 1.24 (95% confidence interval 1.20 to 1.29); P<0.001). We saw a dose-response relation, and the IRR increased by 0.16 (0.13 to 0.19) for each additional CT scan. The IRR was greater after exposure at younger ages (P<0.001 for trend). At 1-4, 5-9, 10-14, and 15 or more years since first exposure, IRRs were 1.35 (1.25 to 1.45), 1.25 (1.17 to 1.34), 1.14 (1.06 to 1.22), and 1.24 (1.14 to 1.34), respectively. The IRR increased significantly for many types of solid cancer (digestive organs, melanoma, soft tissue, female genital, urinary tract, brain, and thyroid); leukaemia, myelodysplasia, and some other lymphoid cancers. There was an excess of 608 cancers in people exposed to CT scans (147 brain, 356 other solid, 48 leukaemia or myelodysplasia, and 57 other lymphoid). The absolute excess incidence rate for all cancers combined was 9.38 per 100,000 person years at risk, as of 31 December 2007. The average effective radiation dose per scan was estimated as 4.5 mSv. CONCLUSIONS The increased incidence of cancer after CT scan exposure in this cohort was mostly due to irradiation. Because the cancer excess was still continuing at the end of follow-up, the eventual lifetime risk from CT scans cannot yet be determined. Radiation doses from contemporary CT scans are likely to be lower than those in 1985-2005, but some increase in cancer risk is still likely from current scans. Future CT scans should be limited to situations where there is a definite clinical indication, with every scan optimised to provide a diagnostic CT image at the lowest possible radiation dose.
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Affiliation(s)
- John D Mathews
- School of Population and Global Health, University of Melbourne, Carlton, Vic 3053, Australia
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Radiation dose in cardiac imaging: how should it affect clinical decisions? AJR Am J Roentgenol 2013; 200:508-14. [PMID: 23436838 DOI: 10.2214/ajr.12.9773] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
OBJECTIVE The purpose of this article is to discuss whether and how the risks of exposure to ionizing radiation should affect clinical decision making in patients with known or suspected cardiovascular disease. CONCLUSION Although the prevalence of cardiovascular disease and frequency of diagnostic testing has risen dramatically, cardiovascular mortality has declined. Earlier and more accurate detection of cardiovascular disease may play an important role. Concerns regarding excessive radiation exposure from cardiovascular imaging have been raised. Efforts to reduce exposure have included selection of appropriate patients for cardiovascular testing, technologic advances, educational resources, and a directed patient-centered approach to testing.
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Kaiser JC, Walsh L. Independent analysis of the radiation risk for leukaemia in children and adults with mortality data (1950-2003) of Japanese A-bomb survivors. RADIATION AND ENVIRONMENTAL BIOPHYSICS 2013; 52:17-27. [PMID: 23124826 PMCID: PMC3579470 DOI: 10.1007/s00411-012-0437-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2012] [Accepted: 10/21/2012] [Indexed: 05/21/2023]
Abstract
A recent analysis of leukaemia mortality in Japanese A-bomb survivors has applied descriptive models, collected together from previous studies, to derive a joint excess relative risk estimate (ERR) by multi-model inference (MMI) (Walsh and Kaiser in Radiat Environ Biophys 50:21-35, 2011). The models use a linear-quadratic dose response with differing dose effect modifiers. In the present study, a set of more than 40 models has been submitted to a rigorous statistical selection procedure which fosters the parsimonious deployment of model parameters based on pairwise likelihood ratio tests. Nested models were consequently excluded from risk assessment. The set comprises models of the excess absolute risk (EAR) and two types of non-standard ERR models with sigmoidal responses or two line spline functions with a changing slope at a break point. Due to clearly higher values of the Akaike Information Criterion, none of the EAR models has been selected, but two non-standard ERR models qualified for MMI. The preferred ERR model applies a purely quadratic dose response which is slightly damped by an exponential factor at high doses and modified by a power function for attained age. Compared to the previous analysis, the present study reports similar point estimates and confidence intervals (CI) of the ERR from MMI for doses between 0.5 and 2.5 Sv. However, at lower doses, the point estimates are markedly reduced by factors between two and five, although the reduction was not statistically significant. The 2.5 % percentiles of the ERR from the preferred quadratic-exponential model did not fall below zero risk in exposure scenarios for children, adolescents and adults at very low doses down to 10 mSv. Yet, MMI produced risk estimates with a positive 2.5 % percentile only above doses of some 300 mSv. Compared to CI from a single model of choice, CI from MMI are broadened in cohort strata with low statistical power by a combination of risk extrapolations from several models. Reverting to MMI can relieve the dilemma of needing to choose between models with largely different consequences for risk assessment in public health.
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Affiliation(s)
- Jan Christian Kaiser
- Helmholtz Zentrum München, German Research Centre for Environmental Health, Institute of Radiation Protection, 85764 Oberschleissheim, Germany.
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Scarfe WC. Radiation risk in low-dose maxillofacial radiography. Oral Surg Oral Med Oral Pathol Oral Radiol 2012; 114:277-80. [DOI: 10.1016/j.oooo.2012.07.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2012] [Accepted: 07/06/2012] [Indexed: 11/26/2022]
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