Journal of Radiological Protection最新文献_第8页

Evaluation of the performance of digital x-ray systems in pelvis radiography. 评估数字 X 射线系统在骨盆放射摄影中的性能。

IF 1.4 4区环境科学与生态学

Journal of Radiological Protection Pub Date : 2024-07-10 DOI: 10.1088/1361-6498/ad5d79

Antonio Jreije, Leonid Krynke, Birutė Gricienė, Bernardas Rimkus, Jūratė Dementavičienė, Kirill Skovorodko

{"title":"Evaluation of the performance of digital x-ray systems in pelvis radiography.","authors":"Antonio Jreije, Leonid Krynke, Birutė Gricienė, Bernardas Rimkus, Jūratė Dementavičienė, Kirill Skovorodko","doi":"10.1088/1361-6498/ad5d79","DOIUrl":"10.1088/1361-6498/ad5d79","url":null,"abstract":"The aim of this study was to investigate the performance of eight digital radiography systems and to optimise the dose-image quality relationship for digital pelvis radiography. The study involved eight digital radiography systems used for general examinations at Vilnius University Hospital Santaros Klinikos. An anthropomorphic pelvic phantom (CIRS, US) was used to simulate a patient undergoing clinical pelvis radiography. Dose quantities entrance surface dose, dose area product (DAP) and exposure parameters (kVp, mA, mAs) were measured and the effects on the images were evaluated, considering physical contrast to noise ratio (CNR) and observer-based evaluations as image quality metrics. Increasing the tube voltage by 5 kVp from standard protocol led to a reduction in radiation dose (DAP) by 12%-20% with a slight impact on image quality (CNR decreases by 2%-10%). There was an inter-observer variability in image rating across different equipment (kappa value between 0 and 0.3); however, both observers agreed that increasing kVp up to 85-90 kV had no effect on perceived image quality. The results indicate that optimisation strategies should be tailored specifically for each x-ray system since significant performance differences and wide variations in radiation dose exist across various digital radiography systems used in clinical settings. The use of high kVp can be used for dose optimisation in digital pelvis radiography without compromising image diagnostic accuracy.","PeriodicalId":50068,"journal":{"name":"Journal of Radiological Protection","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141477811","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Why do we study science and collaborate? Thoughts on present-day cooperations with scientists of Russia. 我们为什么要研究科学并开展合作？关于当今与俄罗斯科学家合作的思考。

IF 1.4 4区环境科学与生态学

Journal of Radiological Protection Pub Date : 2024-07-03 DOI: 10.1088/1361-6498/ad5b68

Steven L Simon, André Bouville, F Owen Hoffman, Lynn R Anspaugh

引用次数: 0

Activity estimates of localised gamma emitting radionuclides using a GR-135 survey meter. 使用 GR-135 测量仪估算局部伽马放射性核素的放射性活度。

IF 1.4 4区环境科学与生态学

Journal of Radiological Protection Pub Date : 2024-07-01 DOI: 10.1088/1361-6498/ad5a17

Brian Bewer

引用次数: 0

Designing an improved model of the adult female ICRP reference phantom dedicated to mammography procedure. 设计一种改进型的成年女性 ICRP 参考模型，专用于乳腺 X 射线照相术。

IF 1.4 4区环境科学与生态学

Journal of Radiological Protection Pub Date : 2024-06-28 DOI: 10.1088/1361-6498/ad455e

Atiyeh Ebrahimi-Khankook, Alireza Vejdani-Noghreiyan, Hamidreza Khodajou-Chokami, Zahra Abbasi-Khiabani

{"title":"Designing an improved model of the adult female ICRP reference phantom dedicated to mammography procedure.","authors":"Atiyeh Ebrahimi-Khankook, Alireza Vejdani-Noghreiyan, Hamidreza Khodajou-Chokami, Zahra Abbasi-Khiabani","doi":"10.1088/1361-6498/ad455e","DOIUrl":"10.1088/1361-6498/ad455e","url":null,"abstract":"Mammography is an x-ray-based imaging method to examine breast abnormalities. Since low-energy photons are used in mammography, doses to different organs would depend strongly on the phantom posture and anatomy. Until now, a few studies have been performed on doses delivered to different organs during mammography. However, in none of them, the correct posture of the patient has been considered. In the present study, the effect of accurate patient positioning, on doses to organs in the chest region were investigated through Monte Carlo simulations. The results show the rotation of the phantom head, may affect organ doses up to 60%. Also, ignoring the head in dosimetry calculations changes scattering effects and causes dose uncertainty of about 8% for these organs. Moreover, according to the obtained results, not compressing the breast causes serious dose misestimation. Finally, using developed phantoms dedicated for mammography, total doses received by different organs have been calculated for the tube voltages of 25, 28, 30 and 35 kVp and for craniocaudal and mediolateral oblique views.","PeriodicalId":50068,"journal":{"name":"Journal of Radiological Protection","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140865620","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Object and person tracking systems to enable extremity dosimetry in nuclear medicine using computational methods. 利用计算方法实现核医学中四肢剂量测定的物体和人员跟踪系统。

IF 1.4 4区环境科学与生态学

Journal of Radiological Protection Pub Date : 2024-06-25 DOI: 10.1088/1361-6498/ad53d5

Daniel Santiago Rondón, Pasquale Lombardo, Mahmoud Abdelrahman, Lara Struelens, Filip Vanhavere, Niki Bergans

{"title":"Object and person tracking systems to enable extremity dosimetry in nuclear medicine using computational methods.","authors":"Daniel Santiago Rondón, Pasquale Lombardo, Mahmoud Abdelrahman, Lara Struelens, Filip Vanhavere, Niki Bergans","doi":"10.1088/1361-6498/ad53d5","DOIUrl":"10.1088/1361-6498/ad53d5","url":null,"abstract":"Nuclear medicine (NM) professionals are potentially exposed to high doses of ionising radiation, particularly in the skin of the hands. Ring dosimeters are used by the workers to ensure extremity doses are kept below the legal limits. However, ring dosimeters are often susceptible to large uncertainties, so it is difficult to ensure a correct measurement using the traditional occupational monitoring methods. An alternative solution is to calculate the absorbed dose by using Monte Carlo simulations. This method could reduce the uncertainty in dose calculation if the exact positions of the worker and the radiation source are represented in these simulations. In this study we present a set of computer vision and artificial intelligence algorithms that allow us to track the exact position of unshielded syringes and the hands of NM workers. We showcase a possible hardware configuration to acquire the necessary input data for the algorithms. And finally, we assess the tracking confidence of our software. The tracking accuracy achieved for the syringe detection was 57% and for the hand detection 98%.","PeriodicalId":50068,"journal":{"name":"Journal of Radiological Protection","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141248842","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Gaussian-plume based Monte Carlo method for calculating radiation dose in the near field of buildings. 基于高斯体积的蒙特卡洛方法，用于计算建筑物近场的辐射剂量。

IF 1.5 4区环境科学与生态学

Journal of Radiological Protection Pub Date : 2024-06-17 DOI: 10.1088/1361-6498/ad53d6

D J Gallacher, A G Robins, P Hayden

{"title":"A Gaussian-plume based Monte Carlo method for calculating radiation dose in the near field of buildings.","authors":"D J Gallacher, A G Robins, P Hayden","doi":"10.1088/1361-6498/ad53d6","DOIUrl":"10.1088/1361-6498/ad53d6","url":null,"abstract":"A Monte Carlo (MC) programme was written using the dose point kernel method to calculate doses in the roof zone of a building from nearby releases of radioactive gases. A Gaussian Plume Model (GPM) was parameterised to account for near-field building effects on plume spread and reflection from the roof. Rooftop recirculation zones and building-generated plume spread effects were accounted in a novel Dual Gaussian Plume (DGP) formulation used with the MC model, which allowed for the selection of angle of approach flow, plume release height in relation to the building and position of the release point in relation to the leading edge of the building. Three-dimensional wind tunnel concentration field data were used for the parameterisation. The MC code used the parameterised concentration field to calculate the contributions to effective dose from inhalation, cloud immersion from positron/beta particles, and gamma-ray dose for a wide range of receptor dose positions in the roof zone, including receptor positions at different heights above the roof. Broad trends in predicted radiation dose with angle of approach flow, release position in relation to the building and release height are shown. Alternative approaches for the derivation of the concentration field are discussed.","PeriodicalId":50068,"journal":{"name":"Journal of Radiological Protection","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2024-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141248712","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The difficulty of nuclear emergency prevention measures during natural disasters: ongoing challenges in Japan. 自然灾害期间核应急预防措施的难度：日本持续面临的挑战。

IF 1.5 4区环境科学与生态学

Journal of Radiological Protection Pub Date : 2024-06-17 DOI: 10.1088/1361-6498/ad53d7

Momoka Yamamura, Yoshika Saito, Saori Nonaka, Toyoaki Sawano, Chihiro Matsumoto, Akihiko Ozaki, Chika Yamamoto, Tianchen Zhao, Hiroaki Saito, Makoto Kosaka, Toshiki Abe, Masaharu Tsubokura

引用次数: 0

Comparison of linear energy transfer measurement for therapeutic carbon beam using CR-39 and TLD. 使用 CR-39 和 TLD 测量治疗用碳光束的线性能量传递比较。

IF 1.5 4区环境科学与生态学

Journal of Radiological Protection Pub Date : 2024-06-14 DOI: 10.1088/1361-6498/ad53d9

Zhou Yuan, Weihai Zhuo, Shiyan Yang, Zhiling Li, Jingfang Zhao, Bo Chen

引用次数: 0

Monte Carlo modelling of cyclotron and radioisotope center (CYRIC) at Tohoku University: a radiation protection study. 东北大学回旋加速器和放射性同位素中心（CYRIC）的蒙特卡罗建模：辐射防护研究。

IF 1.5 4区环境科学与生态学

Journal of Radiological Protection Pub Date : 2024-06-13 DOI: 10.1088/1361-6498/ad5450

Hiroshi Watabe, Peter K N Yu, Gary Tse, Dragana Krstic, Dragoslav Nikezic, M Rafiqul Islam, Zhanbing Wei, Yuezhou Wei, Mehrdad Shahmohammadi Beni

引用次数: 0

Improving a regional project on diagnostic reference levels for interventional procedures (OPRIPALC) with the support of a dose management system for the protection of patients and staff. 在剂量管理系统的支持下，改进介入程序诊断参考水平地区项目（OPRIPALC），以保护病人和工作人员。

IF 1.5 4区环境科学与生态学

Journal of Radiological Protection Pub Date : 2024-06-12 DOI: 10.1088/1361-6498/ad53d8

E Vano, J M Fernández-Soto, R M Sánchez-Casanueva, J I Ten Morón

{"title":"Improving a regional project on diagnostic reference levels for interventional procedures (OPRIPALC) with the support of a dose management system for the protection of patients and staff.","authors":"E Vano, J M Fernández-Soto, R M Sánchez-Casanueva, J I Ten Morón","doi":"10.1088/1361-6498/ad53d8","DOIUrl":"10.1088/1361-6498/ad53d8","url":null,"abstract":"Interventional radiology is a clinical practice with important benefits for patients, but which involves high radiation doses. The optimisation of radiation protection (RP) for paediatric interventional cardiology is a priority for both patients and staff. The use of diagnostic reference levels (DRLs) has been proposed by the International Commission on Radiological Protection to improve RP in imaging procedures. Dose management systems (DMSs) allow the automatic collection of dosimetric, geometric and technical data to assist the optimisation process, with a continuous audit of the procedures, generating alerts to implement corrective actions when necessary. Patient dose indicators may be analysed individually and for different radiation events (fluoroscopy and cine runs). Occupational doses per procedure may be analysed (if electronic dosimeters are available) and linked with patient doses for an integrated approach to RP. Regional optimisation programmes require data collection and processing from several countries to set and periodically update the DRLs. Patient data is anonymised, and each participating hospital has access to their data in a central computer server. Using DMSs may be one of the best ways to support these programs in the collection and analysis of data, raising alerts about high patient and occupational doses and suggesting optimisation actions.","PeriodicalId":50068,"journal":{"name":"Journal of Radiological Protection","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2024-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141248838","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0