Radiation Physics and Chemistry最新文献

{"title":"Radiation shielding properties evaluation of strontium-zinc borate glass doping with Yb2O3 and its dosimetry estimation of human organs on MRCP-AM phantoms","authors":"C. Mutuwong, W. Chaiphaksa, P. Meejitpaisan, S. Yonphan, P. Boontueng, W. Cheewasukhanont, N. Intachai, M. Tungjai, H.J. Kim, S. Kothan, J. Kaewkhao","doi":"10.1016/j.radphyschem.2025.113112","DOIUrl":"https://doi.org/10.1016/j.radphyschem.2025.113112","url":null,"abstract":"Radiation protection in both diagnostic and therapeutic radiology facilities is critical for occupational safety. This study focuses on the development and characterization of a strontium-zinc borate glass system doped with varying concentrations of Yb<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf> (0 to 6 mol%)—coded as SrZBYb0 through SrZBYb6. The research aims to assess the organ-level absorbed dose in a computational human model and to evaluate the shielding efficiency of these glasses. X-ray attenuation properties were calculated using the PHITS Monte Carlo simulation, employing the mesh-type reference computational phantoms representing an adult male (MRCP-AM). A range of X-ray tube voltages was simulated to determine dose absorption under both diagnostic and therapeutic conditions. The SpekPy tool was used to model the X-ray spectra. Results revealed a progressive increase in glass density and X-ray shielding performance with higher Yb<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf> content while maintaining high transmittance (%T &gt; 85%) in the visible spectrum and absorbance in the near-infrared. As tube voltage increased from 60 kVp to 120 kVp, the photon energy spectrum broadened from 0–0.06 MeV to 0–0.12 MeV. Incorporating the shielding glass led to a significant reduction in both absorbed and effective dose rates in MRCP-AM models. The absorbed dose of the brain, liver, left eye, right eye, left lung, right lung, prostate, and thyroid at 120 kVp has been reduced by 85.06%, 87.30%, 92.19%, 92.46%, 88.02%, 87.98%, 85.16%, and 90.01%, respectively, when the SrZBYb6 shielding glass (thickness = 0.3 cm) is installed. These findings suggest that the developed glasses offer a promising alternative for applications requiring efficient photon shielding.","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"27 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144515958","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":"Optimization of Energy Transfer in Tb3+/Sm3+ Ions Doped Silico Boro Tellurite Scintillation Glass for X-ray Imaging Application","authors":"W. Wongwan, P. Yasaka, K. Boonin, A. Angnanon, N. Intachai, S. Kothan, H.J. Kim, J. Kaewkhao","doi":"10.1016/j.radphyschem.2025.113124","DOIUrl":"https://doi.org/10.1016/j.radphyschem.2025.113124","url":null,"abstract":"The present work focuses on synthesizing 30TeO<ce:inf loc=\"post\">2</ce:inf>: 20B<ce:inf loc=\"post\">3</ce:inf>O<ce:inf loc=\"post\">3</ce:inf>: (20-x)SiO<ce:inf loc=\"post\">2</ce:inf>: 10Na<ce:inf loc=\"post\">2</ce:inf>O: 15BaO: 5Tb<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf>: xSm<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf> glasses with varying Sm<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf> concentrations (0.00- 2.00 mol%) to study energy transfer between Tb<ce:sup loc=\"post\">3+</ce:sup> and Sm<ce:sup loc=\"post\">3+</ce:sup> ions. The glass samples were characterized for density, molar volume, refractive index, absorption spectra, photoluminescence, quantum yield, lifetime, and energy transfer efficiency. Structural analysis by XRD confirmed their amorphous nature. FTIR and Raman studies revealed increased network connectivity and reduced non-bridging oxygen content with Sm<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf> addition. The optical bandgap values ranged from 2.961 to 3.132 eV, with a minimum at 0.5 mol% Sm<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf>, while the Urbach energy show no clear trend with increasing Sm<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf> content and fall within the range of 0.233–0.303 eV, suggesting minimal variation in structural disorder. Absorption spectra were evaluated in the wavelength region between 400 and 2500 nm, showing 11 absorption peaks at 944, 1083, 1238, 1383, 1485, and 1543 nm, corresponding to energy transitions of Sm<ce:sup loc=\"post\">3+</ce:sup> ion from the ground level of <ce:sup loc=\"pre\">6</ce:sup>H<ce:inf loc=\"post\">5</ce:inf>/<ce:inf loc=\"post\">2</ce:inf> to <ce:sup loc=\"pre\">6</ce:sup>F<ce:inf loc=\"post\">11</ce:inf>/<ce:inf loc=\"post\">2</ce:inf>, <ce:sup loc=\"post\">9</ce:sup>/<ce:inf loc=\"post\">2</ce:inf>, <ce:sup loc=\"post\">7</ce:sup>/<ce:inf loc=\"post\">2</ce:inf>, <ce:sup loc=\"post\">5</ce:sup>/<ce:inf loc=\"post\">2</ce:inf>, <ce:sup loc=\"post\">3</ce:sup>/<ce:inf loc=\"post\">2</ce:inf>, <ce:sup loc=\"pre\">6</ce:sup>H<ce:inf loc=\"post\">15</ce:inf>/<ce:inf loc=\"post\">2</ce:inf>, and <ce:sup loc=\"pre\">6</ce:sup>F<ce:inf loc=\"post\">1</ce:inf>/<ce:inf loc=\"post\">2</ce:inf>. Additionally, absorption peaks for Tb<ce:sup loc=\"post\">3+</ce:sup> ion were observed at 484, 1892, and 2200 nm, corresponding to transitions from <ce:sup loc=\"pre\">7</ce:sup>F<ce:inf loc=\"post\">6</ce:inf> to <ce:sup loc=\"pre\">5</ce:sup>D<ce:inf loc=\"post\">4</ce:inf> and <ce:sup loc=\"pre\">7</ce:sup>F<ce:inf loc=\"post\">0</ce:inf>,<ce:inf loc=\"post\">1</ce:inf>,<ce:inf loc=\"post\">2</ce:inf>, respectively. Photoluminescence studies showed efficient Tb<ce:sup loc=\"post\">3+</ce:sup>→Sm<ce:sup loc=\"post\">3+</ce:sup> energy transfer with maximum emission at 0.5 mol% Sm<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf>. The glasses emitted visible light under X-ray excitation, confirming their potential for X-ray imaging applications.","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"272 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144515957","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":"Investigation of the microstructural, microhardness, neutron, and secondary gamma-ray shielding properties of Al-B-W composite","authors":"Yasin Gaylan","doi":"10.1016/j.radphyschem.2025.113122","DOIUrl":"https://doi.org/10.1016/j.radphyschem.2025.113122","url":null,"abstract":"In this study, Al6061-20B-xW (x: 0, 5, 10 and 15) composite powders were produced by mechanical alloying and formed into cylindrical specimens by uniaxial cold pressing and their microstructural, microhardness and radiation shielding properties were comprehensively analyzed. Structural properties were investigated using advanced characterization techniques such as X-ray diffraction, energy-dispersive X-ray spectroscopy, and scanning electron microscopy. These analyses provided detailed data on the distribution and effect of W doping within the composite matrix. The addition of W increased the composite's density from 2.54 g/cm<ce:sup loc=\"post\">3</ce:sup> to 2.82 g/cm<ce:sup loc=\"post\">3</ce:sup> and its microhardness from 143.5 Hv to 232.1 Hv. Corrosion resistance improved with 5% W addition but declined with 10% and 15% W additions. The composite's radiation shielding performance against neutron and gamma rays was calculated using the Monte Carlo N-Particle Transport simulation code. Calculations indicate that W doping increases the neutron macroscopic cross-section and contributes to the absorption of secondary gamma rays arising from the neutron-boron interaction. With the addition of W, the secondary gamma-ray intensity decreased from 5.71×10<ce:sup loc=\"post\">-6</ce:sup> to 5.48×10<ce:sup loc=\"post\">-6</ce:sup>, while the gamma-ray linear attenuation coefficient increased from 0.216cm<ce:sup loc=\"post\">-1</ce:sup> to 0.265cm<ce:sup loc=\"post\">-1</ce:sup>. This study demonstrated that the addition of W to the Al-B composite investigated for neutron shielding enhances its effectiveness against both neutrons and the secondary gamma rays generated during neutron absorption.","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"11 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144515804","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 Patient dose and radiation risks at a nuclear medicine department","authors":"Ali Aamry, Jaber Aseiri, Fatimah Daghas, Hussin Aamri, Hassan Salah, Alkhybari, Alkhorayef, Nissren Tamam, David Bradley, Abdelmoneim Sulieman","doi":"10.1016/j.radphyschem.2025.113120","DOIUrl":"https://doi.org/10.1016/j.radphyschem.2025.113120","url":null,"abstract":"This study evaluates the radiation dose received by patients during the parathyroid SPECT/CT procedure and extrapolates the associated cancer risks for sensitive organs. The radiation doses were assessed for 20 patients, 12 females (60%) and eight males (40%), who underwent the SPECT/CT procedure. The organs of the patients and the effective dose were determined using the administered activity of 99mTc--methoxyisobutylisonitrilec (MIBI) (AA, MBq) and the dose from the external CT procedure. All procedures utilized two-hybrid systems (GE and Siemens SPECT/CT) at King Saud Medical City, Riyadh, Saudi Arabia. The overall average and range of the effective dose (mSv) is 6.0 (3.1 to 7.5) per SPECT/CT procedure. The probability of cancer risk is oner per 3400 SPECT/CT procedure, on average. The CT procedures contributed 89.1 % of the total effective dose, while 10.9 % resulted from external exposure (CT exposure). The dose per SPECT/CT examination is lower than most reported literature due to the optimised usage of radionuclides’ and CT image acquisition protocol. The findings of this study are significant in understanding the radiation safety and imaging procedures in the medical field.","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"36 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144504012","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":"Influence of gamma radiation on the structural, optical, and electrical properties of indium tin oxide films with varying thicknesses","authors":"Nalutporn Phiboon, Watcharaporn Thongjoon, Chantana Aiempanakit, Akapong Phunpueok, Sarawut Jaiyen, Montri Aiempanakit, Kamon Aiempanakit","doi":"10.1016/j.radphyschem.2025.113116","DOIUrl":"https://doi.org/10.1016/j.radphyschem.2025.113116","url":null,"abstract":"This work explores how gamma radiation affects the optical and electrical behavior of indium tin oxide (ITO) thin films with two different thicknesses, 100 nm and 200 nm. The films were fabricated using DC magnetron sputtering under a constant power of 20 W and then irradiated with gamma rays at doses from 0 to 150 kGy. Structural characteristics were examined by X-ray diffraction (XRD), while surface morphology was studied using field emission scanning electron microscopy (FE-SEM). Optical measurements were performed using a UV-Vis spectrophotometer, and electrical properties were investigated by four-point probe and Hall effect methods. The experimental results indicate that the 200 nm films showed enhanced XRD peak intensity after gamma irradiation, whereas the 100 nm films exhibited a reduction in peak intensity. Both the optical transmittance and energy bandgap decreased as the radiation dose increased. In terms of resistivity, the 100 nm films showed a slight increase at 50 kGy before decreasing at higher doses, while the 200 nm samples presented a consistent increase throughout the dose range. Overall, the findings reflect how film thickness and radiation exposure together influence the physical and electronic characteristics of ITO layers.","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"94 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144504013","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":"The influence of geometry and specific electronic and nuclear energy deposition on ion-stimulated desorption from thin self-supporting membranes","authors":"Radek Holeňák, Michaela Malatinová, Eleni Ntemou, Tuan T. Tran, Daniel Primetzhofer","doi":"10.1016/j.radphyschem.2025.113123","DOIUrl":"https://doi.org/10.1016/j.radphyschem.2025.113123","url":null,"abstract":"We investigate the dependence of the yield of positive secondary ions created upon impact of primary <ce:sup loc=\"pre\">4</ce:sup>He<ce:sup loc=\"post\">+</ce:sup>, <ce:sup loc=\"pre\">11</ce:sup>B<ce:sup loc=\"post\">+</ce:sup> and <ce:sup loc=\"pre\">22</ce:sup>Ne<ce:sup loc=\"post\">+</ce:sup> ions on geometry and electronic and nuclear energy deposition by the projectiles. We employ pulsed beams in the medium energy regime and a large position-sensitive, time-of-flight detection system to ensure accurate quantification. As a target, we employ a single crystalline Si(100) self-supporting 50 nm thick membrane thus featuring two identical surfaces enabling simultaneous measurements in backscattering and transmission geometry. Electronic sputtering is identified as the governing mechanism for the desorption of hydrogen and molecular species found on the surfaces. Nevertheless, larger energy deposition to the nuclear subsystem by heavier projectiles as well as due to the directionality of the collision cascade appears to act in synergy with the electronic energy deposition leading to an overall increase in secondary ion yields. A higher yield of ions sputtered from the matrix is observed in transmission (forward) geometry only for B and Ne ions, consistent with the observed role of nuclear stopping.","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"33 8 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144515803","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":"High quantum yield glass scintillator based on Ta2O5 and La2O3 in mixed glass former for synchrotron and medical x-rays imaging applications","authors":"N. Intachai, W. Rachniyom, N. Wantana, W. Thanyaphirak, F. Khrongchaiyaphum, C.S. Sarumaha, P. Pakawanit, C. Phoovasawat, P. Kanjanaboos, K. Choodam, H.J. Kim, Y. Tariwong, H. Niamin, S. Kothan, J. Kaewkhao","doi":"10.1016/j.radphyschem.2025.113113","DOIUrl":"https://doi.org/10.1016/j.radphyschem.2025.113113","url":null,"abstract":"In this work, high quantum yield glass scintillator based on Ta<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">5</ce:inf> and La<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf> in mixed glass former","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"149 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144515630","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":"Analysis of the first rain after a prolonged drought in southern Brazil using TXRF","authors":"Letícia Martins Birelo, Aline Mariani de França, João Marcos Fávaro Lopes, Avacir Casanova Andrello, Eduardo Inocente Jussiani","doi":"10.1016/j.radphyschem.2025.113117","DOIUrl":"https://doi.org/10.1016/j.radphyschem.2025.113117","url":null,"abstract":"In September 2024, following a prolonged drought and widespread wildfires across Brazil, the first rainfall was forecasted in the southern region of the country. This study investigates the chemical composition of this rainwater. Rainwater samples were collected from 15 locations and analyzed using Total Reflection X-ray Fluorescence (TXRF) with a Bruker S2 Picofox system. The results revealed the presence of elements such as Al, Si, P, S, Cl, K, Ca, Ti, Cr, Mn, Fe, Cu, Zn, Br, Ba, and Sr. The highest concentrations were observed for Ca (425 mg/L), Cl (353 mg/L), Si (265 mg/L), K (150 mg/L), Fe (149 mg/L), and Al (119 mg/L). These findings highlight the relationship between environmental events, such as droughts and wildfires, and rainwater composition, emphasizing broader implications for air quality and water resources.","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"949 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144504014","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":"Innovative technologies of waste pharmaceutical recycling for radiation shielding glass production","authors":"S. Ravangvong, P. Glumglomchit, K. Sriwongsa, S. Kaewjaeng, O. Ornketphon, W. Cheewasukhanont, W. Chaiphaksa, S. Yonphan, C. Mutuwong, S. Kothan, J. Kaewkhao","doi":"10.1016/j.radphyschem.2025.113101","DOIUrl":"https://doi.org/10.1016/j.radphyschem.2025.113101","url":null,"abstract":"The pharmaceutical glass waste (PGW) based glass systems (PG glass systems) were fabricated for ionizing radiation shielding glass in compositions (70-x)PGW: 20Na<ce:inf loc=\"post\">2</ce:inf>O: 10ZnO: xBaO (where x = 0, 5, 10, 15, 20 and 25 mol%) using melt quenching process. The physical and optical properties measurement of PG glass systems such as density and refractive index found that both values increased with increasing BaO content. The X-rays diffraction (XRD) process confirmed the non-crystalline structure with no sharp peaks. The X and gamma-rays shielding properties have been investigated and analyzed regarding the mass attenuation coefficient (MAC) and half value layer (HVL). Moreover, the experimental results for gamma-rays were compared with FLUKA Monte Carlo. Additionally, X and gamma-rays shielding characteristics were compared with some materials. It was found that the increasing BaO content improved X and gamma-rays shielding properties. Moreover, the thermal neutrons were also explained on shielding properties. The results of this work indicate the potential of recycling pharmaceutical glass waste for shielding X and gamma-rays, as well as thermal neutrons applications.","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"18 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144503942","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":"Radiation and effective dose for contrast-enhanced computed tomography angiography procedures","authors":"Abdullah Al Mansour, Abdelmoneim Sulieman","doi":"10.1016/j.radphyschem.2025.113102","DOIUrl":"https://doi.org/10.1016/j.radphyschem.2025.113102","url":null,"abstract":"Contrast-enhanced computed tomography angiography (CECTA) is a crucial diagnostic tool for evaluating lower-limb vascular pathologies with high sensitivity and specificity. Previous studies have shown that patients receive higher radiation doses per procedure, which may increase their risk of cancer. Therefore, weighing the benefits against the potential risks and optimizing the patient dose are essential. This study used three imaging protocols to optimize the radiation dose for patients during lower-limb CECTA procedures. The data collected in this study comprised 151 patients: 61 (40.4%) females and 90 (59.6%) males who underwent CECTA procedures. The patient population was classified into three groups according to the image acquisition protocol: routine (standard), combined low-dose (a combination low-dose technique with standard and high-quality dose), and low-dose techniques. A Toshiba computed tomography (CT) scanner (160 MDCT) was used for all patients. The CT-Expo software was used to calculate the effective dose per CECTA procedure. The average air kerma length product (P<ce:inf loc=\"post\">KL</ce:inf> (mGy.cm)) and average volume CT air kerma index (C<ce:inf loc=\"post\">vol</ce:inf> (mGy)) per CECTA procedure were 3,250, 1,280, and 429 and 15, 3.24, and 2.37 for routine, combined low-dose, and low-dose techniques, respectively. The dose reductions per procedure (P<ce:inf loc=\"post\">KL</ce:inf> (mGy.cm)), for those who underwent the same procedures, were 47.7%, 79.3%, and 48.3% for routine, combined low-dose, and low-dose techniques, respectively. The significant dose reductions achieved in our study provide optimism for potential improvements in patient safety. However, the urgency of the situation should not be overlooked. Immediate action is required to reduce the dose to patients through proper use of the dose-saving capabilities of modern CT technology.","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"2 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144504015","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}