Bismuth shielding in computed tomography

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August undefined, 2024

WebCoronary computed tomography angiography (CCTA) ... Bismuth shielding significantly decreased organ doses (p<0.001); a significant difference was found in both medium- and large-breast phantoms, and for both helical and axial scanning (p<0.02 for each). Breast dose was decreased by 46–57% with shielding, depending on the scan protocol and ... WebBackground: Although the bismuth breast shield can reduce radiation exposure to the breast during dual-energy computed tomography (DECT), it can potentially affect …

Dose reduction in CT using bismuth shielding: measurements …

WebKeywords: coronary artery CT angiography, bismuth breast shield, MEC, AEC, breast dose. 1. INTRODUCTION system which has been introduced with the development of The artificial radiation exposure is about 20% of the total amount of radiation exposure for human beings, and more than 15% of the artificial radiation exposure is caused by medical WebApr 1, 2024 · The radiation shielding effects and elastic properties of adding lead (Pb) and bismuth (Bi) to glasses was analyzed. Six different glasses, coded as G1-G6, were simulated with varying compositions ... church of england past cases review

Reducing absorbed dose to eye lenses in head CT examinations: …

WebBismuth shielding has been used to reduce the dose from CT to anterior radiosensitive organs, such as the breast, lens of the eye, thyroid, and gonads [1,2]. ... Cantera A: Quantitative assessment of selective in-plane shielding of tissues in computed tomography through evaluation of absorbed dose and image quality. Eur Radiol 2006, … WebApr 20, 2016 · The aim of this study is to implement a bismuth eye lens shielding system for Head-CT acquisitions in these cases. ... Loader R (2013) A phantom-based evaluation of three commercially available patient organ shields for computed tomography X-ray examinations in diagnostic radiology. Radiat Prot Dosim 155:161–168. Article CAS … WebThe use of bismuth shielding to reduce the dose absorbed by breast during thoracic CT ... [2013] have analyzed image quality using bismuth shielding in Coronary Computed Tomography Angiography (CCTA) and suggested further research. Wang et al. [2011] studied dose reduction and image quality taking into account bismuth shielding and ... church of england patterns for worship

EVALUATION OF BISMUTH SHIELDING EFFECTIVENESS IN …

Protection of superficial organs using bismuth and iodine …

WebJun 25, 2024 · Bismuth shielding techniques have been used to reduce radiation, but image noise increased, degrading image quality. Purpose: The aim of this study was to investigate how the use of iterative reconstruction (IR) combined with bismuth shielding influences image quality. Materials and methods: WebConclusion: Until these alternative methods become available in all departments, bismuth shielding remains a viable dose reduction strategy. KEY WORDS: Computed … church of england pathways loginWebBismuth shielding during CT exams: a literature review. Dose-reducing techniques and patients' radiation protection are of more concern today than in the past with the … church of england passion sunday

"WebApr 1, 2024 · In this research, using direct measurements and Monte Carlo calculations, the potential dose reduction achieved by bismuth shielding in computed tomography was evaluated. The patient dose was ... " - Bismuth shielding in computed tomography

Bismuth shielding in computed tomography

Bismuth Shielding, Organ-based Tube Current …

WebDec 3, 2009 · In this research, using direct measurements and Monte Carlo calculations, the potential dose reduction achieved by bismuth shielding in computed tomography was evaluated. The patient dose was measured using an ionisation chamber in a polymethylmethacrylate (PMMA) phantom that had five measurement points at the … Webwww.ncbi.nlm.nih.gov

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WebComputed Tomography Physical Principles, Patient Care, Clinical Applications, and Quality Control 5th Edition - June 16, 2024 Write a review Author: Euclid Seeram Paperback ISBN: 9780323790635 eBook ISBN: 9780443107009 Purchase options Select country/region Info/Buy Institutional Subscription Request a Sales Quote Tax Exempt … WebDec 1, 2024 · The literature indicates that bismuth shielding increases image noise and CT numbers as well as introducing streak artifacts. Tube current modulation (TCM) technique and iterative reconstruction algorithms can provide some levels of dose reduction to radiosensitive organs and superior image quality without the disadvantages of bismuth …

WebApr 12, 2024 · To compare the dose and image quality of three methods for reducing the radiation dose to the eye at head computed tomography (CT): bismuth shielding, organ-based tube current modulation (TCM ... WebMay 8, 2014 · Despite the dose reduction capabilities of bismuth shields, there are numerous studies that discourage their use. 5,17,18, 29, 39,52 According to several …

WebMar 12, 2024 · Results showed that bismuth shielding is associated with a lower radiation dose exposure than Pb shielding. The dose measured when one to four bismuth shields was used to cover the anteroposterior of the gonad ranged from 35.26 uSv to 0.99 uSv, representing a reduction of 76.38% to 99.34% compared with the unprotected control, … WebMay 30, 2024 · Computed Tomography (CT) has become an important tool to diagnose cancer and to obtain additional information for different clinical questions. Today, it is a very fast, painless and noninvasive test that can be performed high quality images. ... Evaluation in the Use of Bismuth Shielding on Cervical CT Scan Using a Female Phantom

WebApr 12, 2024 · We sought to minimize streak artifacts caused by beam hardening on chest CT scan, obtain high-quality CT images and compare image quality and dose between with and without iodine and bismuth shielding material to protect superficial organs. During CT, the radiation dose was measured and the images evaluated before using the shielding …

WebBackground: Although the bismuth breast shield can reduce radiation exposure to the breast during dual-energy computed tomography (DECT), it can potentially affect material quantification on DECT due to artifacts. Purpose: To evaluate the effects of bismuth breast shielding on iodine quantification and radiation exposure in DECT. church of england patterns of worshipWebJul 15, 2024 · The commercially available bismuth eye shield, consisting of one layer of bismuth-impregnated latex, was 16-cm long, 4-cm wide and equivalent to a 0.07-mm Pb layer (CTEYEPROTEC 2 mm; XProtect, Reinach, Switzerland). A 0.5-cm thick layer of foam is attached by the manufacturer behind the bismuth layer. church of england pathways jobsWebBackground: Coronary computed tomographic angiography (CCTA) is associated with high radiation dose to the female breasts. Bismuth breast shielding offers the potential to significantly reduce dose to the breasts and nearby organs, but the magnitude of this reduction and its impact on image quality and radiation dose have not been evaluated. dewalt refurbished tools websiteWebFeb 21, 2024 · Bismuth shielding was recommended in 88.89% of the studies based on the maintenance of appropriate image quality under shielding. Noise associated with Bi shielding was 7.5%, 263%, and 23.5% for the eye, thyroid, and breast, respectively. dewalt registration formWebINIS Repository Search provides online access to one of the world's largest collections on the peaceful uses of nuclear science and technology. The International Nuclear Information System is operated by the IAEA in collaboration with over 150 members. dewalt refurbished tools for saleWebJun 20, 2024 · Bismuth has gained attention in preclinical research because of its ability to attenuate X-rays and high biocompatibility, which make it an excellent element for use in a biomedical agent or in radiation shielding. Developments in the synthesis of elemental bismuth nano- and microparticles, their X-radiation interactions, and their biological … dewalt refurbished tools saleWeb6 rows · Jun 25, 2024 · Bismuth shielding techniques have been used to reduce radiation, but image noise increased, ... dewalt refurbished tools scam