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• W2941036191 abstract "Purpose To systematically review scientific literature on the use of intensity-modulated brachytherapy (IMBT), including static and dynamic shielding approaches, to enhance therapeutic ratio. Studies were evaluated for technique, disease site, dosimetry, applicators, dosimetric calculations, and planning algorithms. Comparisons with standard-of-care brachytherapy techniques, alternative IMBT methods, or both were performed for dose-to-target volumes, organs at risk (OARs), and treatment planning or delivery times. Methods and Materials Inclusion criteria were any peer-reviewed journal articles on IMBT published from January 1, 1980, to January 1, 2019, on PubMed, Google Scholar, Cochrane Library, and EBSCO databases. Two independent investigators reviewed each article for inclusion and exclusion criteria and scope. Data collected on each study included technique, source or shield material, disease site, n of study (n = number of simulated plans/treated patients), dose-to-target/OARs, and planning or delivery times. This review adhered to the Preferred Reporting Items for Systemic reviews and Meta Analyses (PRISMA). Results Database queries yielded 1734 results, which were reduced to 436 after exclusion criteria and 78 peer-reviewed journal articles after evaluation of scope. Studies per disease site were 31 for cervical; 16 for rectal; 10 for oculocutaneous; 7 for breast; 6 for prostate; and 8 for other, multiple, or no specific disease site. Eighteen studies demonstrated a significant decrease in dose to OARs (5.1%-68.2%), 11 improved treatment planning or delivery times (7.6%-99.7%), and 6 increased target coverage (18.6%-71.6%) relative to standard-of-care or alternative IMBT technique. IMBT consistently decreased dose to OAR compared with the standard of care at the cost of increased planning or delivery times. Innovations in dose calculation or planning algorithms and applicators were capable of ameliorating prolonged treatment intervals. Conclusions IMBT techniques improved the therapeutic ratio by reducing OAR doses, facilitating dose escalation, or both. Static-shielding techniques are clinically available as a result of the advent of commercially available heterogeneity-corrected dose-calculation algorithms, whereas dynamic-shielding techniques are still preclinical." @default.
• W2941036191 created "2019-05-03" @default.
• W2941036191 creator A5016958000 @default.
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• W2941036191 date "2019-09-01" @default.
• W2941036191 modified "2023-10-15" @default.
• W2941036191 title "Systematic Review of Intensity-Modulated Brachytherapy (IMBT): Static and Dynamic Techniques" @default.
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