Radiation Physics and Chemistry最新文献

{"title":"Ag concentration dependence of the radiophotoluminescence properties in Ag-doped Na–Al borate glasses","authors":"Hiroki Kawamoto,&nbsp;Yutaka Fujimoto,&nbsp;Keisuke Asai","doi":"10.1016/j.radphyschem.2025.112769","DOIUrl":"10.1016/j.radphyschem.2025.112769","url":null,"abstract":"<div><div>Radiophotoluminescence (RPL) is the phenomenon of emission from luminescence centers formed by ionizing radiation and is utilized as the principle of luminescent-type dosimeters. In this study, we investigated the Ag concentration dependence of the RPL properties of Ag-doped Na–Al borate glass to find optimal Ag concentration for dosimeter application. In all samples, a broad emission band peaking at 650 nm was observed after X-ray irradiation. The sensitivity was in the order of 0.4 &lt; 1.0 &lt; 8.0 &lt; 2.0 &lt; 4.0 mol%. Hence, the optimal Ag concentration for personal dosimetry, which requires high sensitivity, was found to be 4.0 mol%. In addition, saturation of the RPL intensity occurred at a lower dose in glass with a higher concentration of Ag. Therefore, the glass with lower Ag concentration was thought to be appropriate for dosimeter used in high dose environments. In addition, the time to complete build-up tended to increase in the glass with a higher Ag concentration. Furthermore, the thermal stability of the RPL centers improved in the glass with a higher concentration of Ag.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"234 ","pages":"Article 112769"},"PeriodicalIF":2.8,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143739481","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Open-source hardware and cost-effective gamma-ray spectrometer using Raspberry Pi Pico","authors":"D.A.B. Bonifacio ,&nbsp;U.B. Rodríguez ,&nbsp;J. Alcántara-Núñez ,&nbsp;A.D. dos Santos ,&nbsp;D.V.S. Carvalho ,&nbsp;H.M. Murata ,&nbsp;M.B. Perotoni ,&nbsp;M. Moralles ,&nbsp;M. Rosezky","doi":"10.1016/j.radphyschem.2025.112728","DOIUrl":"10.1016/j.radphyschem.2025.112728","url":null,"abstract":"<div><div>This work presents the development and evaluation of the OpenGamma spectrometer, an open-source, compact and cost-effective gamma-ray detection system built on a Raspberry Pi Pico board. Data acquisition was performed using a GAGG scintillation crystal coupled with a Silicon Photomultiplier (SiPM). The background count rate was 5.24 counts per second. The system was evaluated with standard radioactive sources, achieving an energy resolution of 7.6% at 662<!--> <!-->keV, which is comparable to other low-cost gamma spectrometers. The energy calibration curve exhibited a slightly quadratic behavior, typical for scintillation detectors. The dead time was estimated at 39.9 <span><math><mo>±</mo></math></span> 3.9<!--> <span><math><mi>μ</mi></math></span>s, reflecting the system’s capacity to process signals with minimal loss. The Gamma MCA web application further enhances the usability of the spectrometer by providing a user-friendly interface for data acquisition and analysis. The OpenGamma spectrometer offers a promising solution for applications in education, research, and field deployment. Future work will focus on improving its energy resolution and dead time to expand its use cases.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"234 ","pages":"Article 112728"},"PeriodicalIF":2.8,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143739486","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessment of radiation hazards linked to lo-salt consumption in Kurdistan Region-Iraq","authors":"Halmat J. Hassan","doi":"10.1016/j.radphyschem.2025.112767","DOIUrl":"10.1016/j.radphyschem.2025.112767","url":null,"abstract":"<div><div>The current study involves 35 salt samples, including naturally occurring radioactive material (NORM) and its potential impact on public health. In Kurdistan-Iraq, retail outlets offer samples of both local and imported products. Samples consist of iodized salt, Himalayan pink salt (pink rock salt), lo-salt (less sodium salt), and sea salt. Assessment is conducted about the radiological risk associated with salt consumption, emphasizing internal exposure dose. The XRF spectrometer and gamma spectroscopy analysis (HPGe) are in use. For the radionuclides ²²⁶Ra and ²³²Th, the salt sample ranged from 0.4 ± 0.1 to 14.2 ± 2.3 and 0.9 ± 0.1 to 36.1 ± 1.4 Bq kg⁻¹, respectively. The maximum activity level of ⁴⁰K was discovered to be 45936 ± 8223 Bq kg⁻¹ in the salt sample labeled S9, which was originally from the UK and included less sodium. Nevertheless, the sample, iodized white table salt, coded S35 (from Turkey), recorded the lowest values at 65.6 ± 4.8 Bq kg⁻¹. It was noted that the NORM content range varied significantly among the salt samples. In contrast, the average radioactivity concentration ranges in salt samples exceeded the average range of the permissible values in the world by UNSCEAR for ²³²Th and ⁴⁰K, at 45 and 412 Bq kg⁻¹, respectively. The annual effective dose of 767 and 549 μSv <span><math><mrow><msup><mi>y</mi><mrow><mo>−</mo><mn>1</mn></mrow></msup></mrow></math></span> would be the result of consuming the lo salt samples S9 and S10, respectively, assuming a daily salt intake of 6.4 g for adults. This exceeds the recommended level of effective 290 μSv <span><math><mrow><msup><mi>y</mi><mrow><mo>−</mo><mn>1</mn></mrow></msup></mrow></math></span>, which is equivalent to (1 mSv <span><math><mrow><msup><mi>y</mi><mrow><mo>−</mo><mn>1</mn></mrow></msup></mrow></math></span>) for members of the general public. Samples of lo-salt less sodium (S9) and Himalayan pink salt (S12) were found to contain lead levels of 21.6 and 20.4 PPM (mg kg⁻¹), respectively, which exceeded the national maximum contamination standard established by Food Standards Contamination and Codex. The daily salt consumption for people is assumed to be 6.4 g d⁻¹. Potential risks of radiation exposure should be addressed in food legislation to mitigate the risk to public health.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"234 ","pages":"Article 112767"},"PeriodicalIF":2.8,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143739482","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhanced photocatalytic ability of CuO/Ni-doped TiO2 nanocomposite under visible light: Theory and experiment","authors":"Atipong Bootchanont ,&nbsp;Sorravich Samerchue ,&nbsp;Chanapong Sipae ,&nbsp;Huali Zhao ,&nbsp;Russameeruk Noonuruk ,&nbsp;Porramain Porjai ,&nbsp;Wutthikrai Busayaporn ,&nbsp;Tirapat Wechprasit ,&nbsp;Thanaphon Kansaard ,&nbsp;Wisanu Pecharapa ,&nbsp;Voranuch Thongpool ,&nbsp;Chakkaphan Wattanawikkam ,&nbsp;Wutthigrai Sailuam","doi":"10.1016/j.radphyschem.2025.112761","DOIUrl":"10.1016/j.radphyschem.2025.112761","url":null,"abstract":"<div><div>CuO/Ni-doped TiO₂ composite photocatalysts were synthesized using a co-precipitation method as the composite of Ni-doped TiO₂ (Ni–TiO₂) with 0.5, 1.0, and 1.5 mol% of CuO. Composites with different CuO/Ni–TiO₂ ratios were studied to assess the influence of Ni and CuO on the crystal and local structure by X-ray diffraction (XRD) and X-ray absorption (XAS). The energy bandgap is investigated by UV–visible spectroscopy and is described by computational calculations using density functional theory (DFT). The correlation between the local site of Ni and the band structure will be analyzed and discussed by comparing the experiment and First-principle calculations. The photocatalytic activity of the CuO/Ni–TiO₂ systems is due to the absorption of radiation in the visible light region. The results indicated that 1.5 mol% of CuO contributes to the Ni–TiO₂ nanoparticles showing highest photocatalytic activity with rate constant of 0.03477 min⁻¹ in the degradation of Rhodamine B, which could be attributed to the low recombination rate of the electron-hole pair, and decrease of the bandgap, increase in the concentration of •OH radicals in the solution, which is beneficial for improving the photo degradation rate of organic compounds.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"234 ","pages":"Article 112761"},"PeriodicalIF":2.8,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143739485","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study and considerations on the determination of attenuation curves in concrete for radiotherapy beams","authors":"J.O. Páez,&nbsp;W. Rodriguez,&nbsp;D. Cano","doi":"10.1016/j.radphyschem.2025.112707","DOIUrl":"10.1016/j.radphyschem.2025.112707","url":null,"abstract":"<div><div>This study addresses the reliance on outdated Tenth Value Layer (TVL) data for radiotherapy beams in concrete, which results in inconsistencies in reported values. Attenuation curves were determined for various radiotherapy accelerator spectra below 10 MV in concrete. The aim is to provide more accurate data with approximately 1% statistical uncertainty, thereby correcting the reliance on outdated TVL data and establishing a more accurate framework for future research.</div><div>Numerical simulations were carried out using Geant4, which also allowed for the evaluation of statistical uncertainties. A divergent isotropic point source beam of X-rays, matching radiotherapy accelerator spectra, was directed toward concrete barriers of varying thicknesses. An ICRU-tissue equivalent detector, simulating the thorax of the MIRD Phantom, was positioned to measure the transmitted dose. The findings indicate that some results aligned with current TVL values, thereby validating the methodology. Nevertheless, many new data points revealed significant differences in shielding thickness requirements based on accelerator spectra and concrete density, along with minor differences attributable to concrete compositions. Discrepancies in shielding thickness from established standards like IAEA SRS47 and NCRP 151 were unraveled by introducing new data alongside the parameters used to determine them.</div><div>This research highlights the need for refined data in radiotherapy accelerator shielding calculations. By presenting new insights, it advocates for improving current practices and emphasizes the importance of reporting accelerator spectra and associated uncertainties. This study contributes by helping users understand which variables are relevant for reporting new data and which are less critical.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"234 ","pages":"Article 112707"},"PeriodicalIF":2.8,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143724908","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"On the sensitivity normalization for blue stimulated luminescence of quartz","authors":"Malika Singhal ,&nbsp;Madhusmita Panda ,&nbsp;O. Annalakshmi ,&nbsp;Naveen Chauhan","doi":"10.1016/j.radphyschem.2025.112764","DOIUrl":"10.1016/j.radphyschem.2025.112764","url":null,"abstract":"<div><div>In the single aliquot regeneration (SAR) dating method for quartz, the maximum dating limit depends on the saturation dose of sensitivity-corrected luminescence signal (L/T) and is generally found to be around ∼250 Gy. Since saturation is the restraining aspect in luminescence dating, it is important to understand the factors that influence it. This paper, investigates the blue stimulated luminescence (BSL) signals of quartz of different provenance using the multiple aliquot additive dose (MAAD) methodology. Results show that the BSL signal increases beyond the saturation limits of SAR. The early saturation in the SAR is observed primarily due to a disproportional increase in the test dose signal (T) at higher doses resulting from its dependence on the prior regeneration dose. The work further searches for normalization methods, which are independent of regeneration doses at high doses. Results show that zero glow thermo-luminescence (TL), BSL (after annealing, UV emission) and TL (after annealing, blue emission) normalization carry negligible previous dose information. These normalization signals are tested for constructing dose-response curve (DRC) using MAAD and multiple aliquot regeneration (MAR) methods. Laboratory generated DRCs are found to be best fitted with double saturating exponential with a second exponential saturation dose of 5800 ± 800 Gy. However, the scatter in the BSL, multiple aliquot data at higher doses (∼kGy) is significant and needs future investigation. The proposed methodology yields higher equivalent doses for the natural samples than SAR but still found to be lower than expected doses.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"234 ","pages":"Article 112764"},"PeriodicalIF":2.8,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143739484","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Reversible polymeric resin cured by ionizing radiation for consolidation of wooden artifacts of cultural heritage","authors":"Maria José Alves de Oliveira,&nbsp;Mariana Araujo,&nbsp;Larissa Otubo,&nbsp;Sonia Mello-Castanho,&nbsp;Pablo Vasquez","doi":"10.1016/j.radphyschem.2025.112765","DOIUrl":"10.1016/j.radphyschem.2025.112765","url":null,"abstract":"<div><div>This study investigated the application of Paraloid B72 resin, modified with methyl methacrylate (MMA) and butyl methacrylate (MaBu) monomers, to develop new materials for the consolidation and restoration of wooden objects. The curing process was conducted using ionizing radiation from a gamma source (cobalt-60), eliminating the need for organic solvents. After characterization by gel fraction analysis, the Paraloid 30 % formulation with MMA 40 % and MaBu 30 % was selected for further characterizations, including Thermogravimetric Analysis (TGA), Differential Scanning Calorimetry (DSC), Fourier Transform Infrared Spectroscopy (FTIR), and impregnation tests. The formulation was impregnated into wooden artifacts, cured using ionizing radiation, and subsequently characterized by FTIR, Scanning Electron Microscopy (SEM), and Computed Tomography (CT). The results showed that ionizing radiation replaces the need for catalysts, increasing the thermal stability of the resin and allowing cure control through dose (in kGy) and dose rate (kGy/h). This enabled the resin impregnation without compromising the integrity or the information contained in the consolidated artifact. The development of the methodology and resin formulation presented scientific challenges, particularly in ensuring that the desirable characteristics and reversibility were maintained.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"234 ","pages":"Article 112765"},"PeriodicalIF":2.8,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143739487","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessment of radiation protection practices in dental clinics in Jeddah, Kingdom of Saudi Arabia","authors":"Shyma M. Alkhateeb, Majdi R. Alnowami, Bandar K. Althobiti, Ibrahim I. Ibrahim, Abdullah F. Aljehani, Salman A. Abuzaid, Ahmad Albngali, Adnan A. Alahmadi, Fatma Badr","doi":"10.1016/j.radphyschem.2025.112759","DOIUrl":"https://doi.org/10.1016/j.radphyschem.2025.112759","url":null,"abstract":"Radiation use has increased, including increased demand for dental rays where radiosensitive organs (thyroid gland and eyes) are often exposed. Therefore, dental clinic workers' awareness and practices of radiation therapy require assessment. We therefore assessed the awareness of radiation protection protocols among dental clinic workers in Jeddah. Questionnaires were completed during visits to different dental institutions and clinics, including educational institutions and private and general medical centres. The questionnaire assessed dental workers' perceptions of radiation exposure and the risks associated with dental radiography. Differences between categorical data were analysed using the chi-squared test or Fisher's exact test, as appropriate. Of 300 participants who completed the questionnaires, (most in their 20s [132, 44 %]; 30s [107, 36 %]) were general dentists, followed by dental assistants, radiographers, and endodontists. There were 133, 106, 38, 10, and 4 participants working at private institutes, university hospitals, regional general hospitals (&gt;300 beds), general sector (&lt;300 beds), and other hospital types, respectively. Overall, 55, 97, 66, 39, 18, and 25 participants had &lt;1, 1–5, 6–10, 10–15, 16–20, and &gt;20 years of experience, respectively. More than half of dental clinic workers were highly knowledgeable about radiation protection, aware of its significance for both patients and staff. However, general hospital dental practitioners had the least radiation protection practices; therefore, general hospice radiation protection awareness is recommended.","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"23 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143744803","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"New estimation of electron and photon internal dose coefficients for new adult female computational phantom using DoseCalcs","authors":"Tarik El Ghalbzouri ,&nbsp;Tarek El Bardouni ,&nbsp;Jaafar El Bakkali ,&nbsp;Mohamed Drissi El-Bouzaidi ,&nbsp;Hicham Satti","doi":"10.1016/j.radphyschem.2025.112705","DOIUrl":"10.1016/j.radphyschem.2025.112705","url":null,"abstract":"<div><div>Internal radiation dosimetry is critical in nuclear medicine procedures involving radiopharmaceuticals as it evaluates the risks and benefits of diagnostic and therapeutic applications. In this context, radiological protection quantities, including absorbed dose and effective dose, are derived from the specific absorbed fraction (SAF), a fundamental dose coefficient. The SAF quantifies the fraction of energy deposited in a target region per unit mass relative to the energy emitted from a specified source region.</div><div>Updating the SAF dataset using the latest mesh-type computational phantoms is strongly recommended. Comparing these values with SAFs from earlier voxel-based phantoms helps identify target<span><math><mo>←</mo></math></span>source combinations with variations in internal dosimetry coefficients, reflecting the anatomical improvements in mesh-type phantoms.</div><div>Simulations using the DoseCalcs platform were conducted for electron and photon transport at eight energies (10 keV to 2 MeV), employing the adult female mesh-type phantom from ICRP Publication 145. Subsequently, SAFs were calculated for twenty-four distinct source regions and compared with those derived by OpenDose using the voxel-based model.</div><div>The results showed that SAFs calculated with mesh-type and voxel-based phantoms are similar, with minor differences observed for both photons and electrons. Notable variations were observed for photons in the spleen<span><math><mo>←</mo></math></span>liver combination and for electrons at low energy, particularly in the pancreas<span><math><mo>←</mo></math></span>liver and liver<span><math><mo>←</mo></math></span>pancreas combinations. These differences highlight the impact of anatomical improvements in mesh-type phantoms. These differences arise from improved internal structures, particularly for adjacent organs/tissues, due to differences in contact surface geometry. The mesh-type model uses smooth surfaces, while the voxel-based model employs stair-based surfaces.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"234 ","pages":"Article 112705"},"PeriodicalIF":2.8,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143734621","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dosimetric analysis of beam number variations in IMRT for head-and-neck, breast, and pelvic cancers using Halcyon","authors":"Luong Tien Phat, Mai Thi Thao, Tran Trung Kien, Duong Thanh Tai, Peter Sandwall, Abdelmoneim Sulieman, Nissren Tamam, Sitti Yani, James C.L. Chow","doi":"10.1016/j.radphyschem.2025.112755","DOIUrl":"https://doi.org/10.1016/j.radphyschem.2025.112755","url":null,"abstract":"This study investigated the dosimetric effects of varying beam numbers (9, 11, and 13) in intensity-modulated radiation therapy (IMRT) using the Halcyon linear accelerator at ShingMark University Hospital. IMRT plans for 27 patients with head-and-neck, breast, and pelvic cancers were evaluated according to the RTOG 0615 protocol, focusing on Planning Target Volume (PTV) dose coverage, uniformity, maximum and minimum doses, and Organ-at-Risk (OAR) dose constraints. For breast cancer, the 11-beam plan improved PTV coverage (V50Gy: 97.9 ± 0.5 %) and reduced maximum dose compared to 9- and 13-beam plans, while the 13-beam plan lowered heart mean dose by up to 10.5 % in left breast cases. In pelvic cases, the 13-beam plan enhanced OAR sparing, reducing bowel V35Gy by 10.5 % compared to the 9-beam plan, with minimal PTV coverage differences (&lt;0.2 %). For head-and-neck cancer, the 13-beam plan improved PTV D95 % and spared critical structures like the brainstem, though it increased doses to the chiasm and cochlea. Treatment time and Monitor Units rose with more beams, particularly for head-and-neck and pelvic cases, but remained minimal for breast cases. These findings suggest tailoring beam numbers to cancer type and clinical priorities, balancing dosimetric benefits with treatment efficiency.","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"11 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143744804","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}