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Comparison of occupational doses and practice of the interventional cardiologists in one department
Abstracts / Physica Medica 32 (2016) 251–273
FIRST SURVEY OF MAMMOGRAPHY PRACTICE IN SUDAN: RADIATION EXPOSURE AND SETTING NATIONAL DIAGNOSTIC REFERENCE LEVELS I.I. Suliman *, S. Awad, Alaa Mahdi, N. Ahmed Sudan Atomic Energy Commission, P.O. Box 3001, Khartoum, Sudan Corresponding author.
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Introduction. Radiation dose in mammography is evaluated in terms of the Mean glandular dose (MGD) because the glandular tissues are believed to be the most sensitive to radiation-induced carcinogenesis. Purpose. The purpose of this study was to estimate mean glandular dose levels (DG) in six mammography systems in Khartoum, Sudan, and to propose national diagnostic reference in Sudan. Materials and methods. Doses were estimated in terms of the Mean Glandular Dose (MGD) in 400 examinations in 204 women who underwent Cranio-Caudal (CC) and Medio-Lateral oblique (MLO) mammography in seven clinics in Khartoum state, Sudan. incident air kerma (IAK) was first estimated from X-ray tube output measurements and patient exposure factors. MGD was then estimated from IAK using conversion coefficients that a count for breasts glandularity and the difference in the X-ray spectrum used. Results. The mean MGD for CC and MLO was (4.45 ± 2.2) mGy and (4.15 ± 2.1) mGy, respectively. The MGD per image was (4.3 ± 1.15) mGy and the MGD per woman was (8.6 ± 2.22) mGy. The MGD values were compared with results from the literature. Significant variations in MGD were observed and revealed important considerations for dose optimization and will be used for setting national diagnostic reference levels. Conclusion. The study offered the first projection of radiation exposure in X-ray mammography in Sudan and thus offered the opportunity for dose optimization and setting national diagnostic reference levels. Disclosure. Authors do not have any relationship that may bias their presentation. http://dx.doi.org/10.1016/j.ejmp.2016.07.539
COMPARISON OF OCCUPATIONAL DOSES AND PRACTICE OF THE INTERVENTIONAL CARDIOLOGISTS IN ONE DEPARTMENT D. Kostova-Lefterova *, H. Mateev, A. Aleksandrov National Cardiology Hospital, Bulgaria Corresponding author.
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Introduction. Occupational dosimetry is a challenge in interventional cardiology. Many professionals do not regularly use their personal dosimeter and it is difficult to assess the reason for higher doses when they appear. Purpose. Comparison of the practice and personal doses of five different interventional cardiologists was done. The purpose of the study was to answer the question: Which is the reason for higher personal doses – radiology practice or complexity of the procedures? Materials and methods. The survey was done for two months period in one department in Bulgaria with two angiography units. Total number of 412 patient data – 232 CA, 113 PCA, 41 procedures for acute myocardial infarction and 26 procedures of higher complexity, was collected. An additional dosimeter was used for assessment of the cardiologists’ practice and dose. Both of the dosimeters were worn under their lead aprons. The additional dosimeter was worn for procedures of lower complexity and the main one – for all procedures done during the survey. A comparison of the received doses from the different dosimeters was done. Results. For two of the cardiologists, A and B, the results of the additional dosimeters worn during procedures of lower complexity
253
showed similar results (0.21 mSv (A) and 0.18 mSv (B)). The main dosimeter worn during all types of procedures showed two times higher dose for A (1.36 mSv) compared to B (0.63 mSv). The average values of the doses for patients treated by A are two times higher for CA compared to B but also the complexity of the procedures is of higher magnitude. The analysis of the practice, patient doses and complexity of the procedures was done for all five interventional cardiologists. Conclusion. The main reason for higher occupational doses is a combination of complexity of the procedure, the individual treatment of every patient and the difference in the radiology practice. http://dx.doi.org/10.1016/j.ejmp.2016.07.540
PROPOSED DOSE REFERENCE LEVELS IN RADIOGRAPHY PROCEDURES IN SUDAN Nada A. Ahmed *, T.S. Mohammed, E.H. Basheir, A.B. Farah, I.I. Suliman Sudan Atomic Energy Commission, Radiation Safety Institute, Sudan Corresponding author.
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Introduction. ICRP introduced the term ‘‘diagnostic reference level (DRL)” as a tool of optimization to help avoid radiation dose to the patient that does not contribute to the clinical purpose of a medical imaging task. Purpose. The purpose of this study was to measure patient radiation dose during the most common seven performed conventional diagnostic procedures and to propose DRLs values for these exams in Sudan. Materials and methods. Third quartile values of the distributions of mean Entrance Skin Air Kerma (ESAK) observed for the most common radiography examination were proposed as DRL values in Sudan .Representative sample of patients ‘‘at least 10 patient in each exam” from 30 governmental and private hospitals distributed over the country were included. ESAK was calculated by measuring the Xray tube output and the corresponding technical and exposure factors for each patient. Results. Proposed DRLs in mGy were settled to be 0.63 for chest PA, 2.3 for skull PA, 1.61 for skull LAT, 4.0 for abdomen, 2.59 for Lumber Spine AP and 10.8 for Lumber Spine lateral. Conclusion. This result considered to be the first proposed DRL for general radiography procedures in Sudan. Disclosure. Authors confirm No any relationship bias their presentation. http://dx.doi.org/10.1016/j.ejmp.2016.07.541
TOWARDS BREAST CANCER ROTATIONAL RADIOTHERAPY WITH SYNCHROTRON RADIATION Francesca Di Lillo *, Giovanni Mettivier, Antonio Sarno, Paolo Russo University of Naples Federico II, Dept. of Physics ‘‘Ettore Pancini” & INFN Sect. of Naples, Naples, Italy ⇑ Corresponding author. Introduction. Rotational kilovoltage external beam radiotherapy (kV-EBRT) for breast cancer with orthovoltage tubes was recently proposed by a team at University of California at Davis, as an alternative to the typical 6-MV photon beams with breast tangential fields produced by a clinical accelerator. On this scientific basis, we propose to implement EBRT in breast cancer therapy, using a monochromatic synchrotron radiation (SR) beam and dedicated setup for irradiating the pendant breast (SR-EBRT). The same platform could
FIRST SURVEY OF MAMMOGRAPHY PRACTICE IN SUDAN: RADIATION EXPOSURE AND SETTING NATIONAL DIAGNOSTIC REFERENCE LEVELS I.I. Suliman *, S. Awad, Alaa Mahdi, N. Ahmed Sudan Atomic Energy Commission, P.O. Box 3001, Khartoum, Sudan Corresponding author.
⇑
Introduction. Radiation dose in mammography is evaluated in terms of the Mean glandular dose (MGD) because the glandular tissues are believed to be the most sensitive to radiation-induced carcinogenesis. Purpose. The purpose of this study was to estimate mean glandular dose levels (DG) in six mammography systems in Khartoum, Sudan, and to propose national diagnostic reference in Sudan. Materials and methods. Doses were estimated in terms of the Mean Glandular Dose (MGD) in 400 examinations in 204 women who underwent Cranio-Caudal (CC) and Medio-Lateral oblique (MLO) mammography in seven clinics in Khartoum state, Sudan. incident air kerma (IAK) was first estimated from X-ray tube output measurements and patient exposure factors. MGD was then estimated from IAK using conversion coefficients that a count for breasts glandularity and the difference in the X-ray spectrum used. Results. The mean MGD for CC and MLO was (4.45 ± 2.2) mGy and (4.15 ± 2.1) mGy, respectively. The MGD per image was (4.3 ± 1.15) mGy and the MGD per woman was (8.6 ± 2.22) mGy. The MGD values were compared with results from the literature. Significant variations in MGD were observed and revealed important considerations for dose optimization and will be used for setting national diagnostic reference levels. Conclusion. The study offered the first projection of radiation exposure in X-ray mammography in Sudan and thus offered the opportunity for dose optimization and setting national diagnostic reference levels. Disclosure. Authors do not have any relationship that may bias their presentation. http://dx.doi.org/10.1016/j.ejmp.2016.07.539
COMPARISON OF OCCUPATIONAL DOSES AND PRACTICE OF THE INTERVENTIONAL CARDIOLOGISTS IN ONE DEPARTMENT D. Kostova-Lefterova *, H. Mateev, A. Aleksandrov National Cardiology Hospital, Bulgaria Corresponding author.
⇑
Introduction. Occupational dosimetry is a challenge in interventional cardiology. Many professionals do not regularly use their personal dosimeter and it is difficult to assess the reason for higher doses when they appear. Purpose. Comparison of the practice and personal doses of five different interventional cardiologists was done. The purpose of the study was to answer the question: Which is the reason for higher personal doses – radiology practice or complexity of the procedures? Materials and methods. The survey was done for two months period in one department in Bulgaria with two angiography units. Total number of 412 patient data – 232 CA, 113 PCA, 41 procedures for acute myocardial infarction and 26 procedures of higher complexity, was collected. An additional dosimeter was used for assessment of the cardiologists’ practice and dose. Both of the dosimeters were worn under their lead aprons. The additional dosimeter was worn for procedures of lower complexity and the main one – for all procedures done during the survey. A comparison of the received doses from the different dosimeters was done. Results. For two of the cardiologists, A and B, the results of the additional dosimeters worn during procedures of lower complexity
253
showed similar results (0.21 mSv (A) and 0.18 mSv (B)). The main dosimeter worn during all types of procedures showed two times higher dose for A (1.36 mSv) compared to B (0.63 mSv). The average values of the doses for patients treated by A are two times higher for CA compared to B but also the complexity of the procedures is of higher magnitude. The analysis of the practice, patient doses and complexity of the procedures was done for all five interventional cardiologists. Conclusion. The main reason for higher occupational doses is a combination of complexity of the procedure, the individual treatment of every patient and the difference in the radiology practice. http://dx.doi.org/10.1016/j.ejmp.2016.07.540
PROPOSED DOSE REFERENCE LEVELS IN RADIOGRAPHY PROCEDURES IN SUDAN Nada A. Ahmed *, T.S. Mohammed, E.H. Basheir, A.B. Farah, I.I. Suliman Sudan Atomic Energy Commission, Radiation Safety Institute, Sudan Corresponding author.
⇑
Introduction. ICRP introduced the term ‘‘diagnostic reference level (DRL)” as a tool of optimization to help avoid radiation dose to the patient that does not contribute to the clinical purpose of a medical imaging task. Purpose. The purpose of this study was to measure patient radiation dose during the most common seven performed conventional diagnostic procedures and to propose DRLs values for these exams in Sudan. Materials and methods. Third quartile values of the distributions of mean Entrance Skin Air Kerma (ESAK) observed for the most common radiography examination were proposed as DRL values in Sudan .Representative sample of patients ‘‘at least 10 patient in each exam” from 30 governmental and private hospitals distributed over the country were included. ESAK was calculated by measuring the Xray tube output and the corresponding technical and exposure factors for each patient. Results. Proposed DRLs in mGy were settled to be 0.63 for chest PA, 2.3 for skull PA, 1.61 for skull LAT, 4.0 for abdomen, 2.59 for Lumber Spine AP and 10.8 for Lumber Spine lateral. Conclusion. This result considered to be the first proposed DRL for general radiography procedures in Sudan. Disclosure. Authors confirm No any relationship bias their presentation. http://dx.doi.org/10.1016/j.ejmp.2016.07.541
TOWARDS BREAST CANCER ROTATIONAL RADIOTHERAPY WITH SYNCHROTRON RADIATION Francesca Di Lillo *, Giovanni Mettivier, Antonio Sarno, Paolo Russo University of Naples Federico II, Dept. of Physics ‘‘Ettore Pancini” & INFN Sect. of Naples, Naples, Italy ⇑ Corresponding author. Introduction. Rotational kilovoltage external beam radiotherapy (kV-EBRT) for breast cancer with orthovoltage tubes was recently proposed by a team at University of California at Davis, as an alternative to the typical 6-MV photon beams with breast tangential fields produced by a clinical accelerator. On this scientific basis, we propose to implement EBRT in breast cancer therapy, using a monochromatic synchrotron radiation (SR) beam and dedicated setup for irradiating the pendant breast (SR-EBRT). The same platform could