Applied Radiation and Isotopes最新文献

{"title":"Editorial.","authors":"Christos Tsabaris, Aleksandaer Jaksic","doi":"10.1016/j.apradiso.2025.111950","DOIUrl":"https://doi.org/10.1016/j.apradiso.2025.111950","url":null,"abstract":"","PeriodicalId":8096,"journal":{"name":"Applied Radiation and Isotopes","volume":" ","pages":"111950"},"PeriodicalIF":1.6,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144224104","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Spectrophotomaterically study for PS and MO/PS composites as high-doses dosimeters","authors":"Samah M. Hussein ,&nbsp;Nahida J. Hameed ,&nbsp;Evan T. Salim","doi":"10.1016/j.apradiso.2025.111935","DOIUrl":"10.1016/j.apradiso.2025.111935","url":null,"abstract":"<div><div>The present work concerns preparing and characterizing polymer systems for dosimetry applications. The samples were cast as a thin film from homopolymer (Polystyrene (PS)) before and after doping with Methyl Orange (MO) at different weight ratios of (0.2 %, 0.4 %, 0.6 %, 0.8 %, and 1 % wt./wt.). The prepared samples were irradiated with ⁶⁰Co (gamma source) within a range of (1–13 kGy). The polymer systems were evaluated spectrostomaterically for use as high-dose dosimeters. The absorption spectra of prepared samples before and after irradiation manifested the Gamma radiation-induced absorption changes with the absorbed doses (Systematic changes) for (PS and 0.2 % MO/PS), and unsystematic for the others. The calibration plots were selected at (700 nm) wavelength for their linear response at this wavelength. The results proved that the PS and 0.2 % MO/PS can be used as dosimeters for their linear response to the radiation dose. The effective dose range in the linear part for PS and 0.2 % MO/PS was (1–13 kGy), and the maximum optical absorption difference reached 1.291 and 1.122, respectively. The two dosimeters show perfect stability for 20 days. The FTIR and optical microscope results were investigated. The photographs elucidated the surface damage, i.e., grooves, holes, bubbles, and cracks induced by photodegradation for the samples involved. It was seen that the PS and 0.2 % MO/PS were promising for use as high-dose dosimeter applications.</div></div>","PeriodicalId":8096,"journal":{"name":"Applied Radiation and Isotopes","volume":"224 ","pages":"Article 111935"},"PeriodicalIF":1.6,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144168530","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Elemental characterisation of arable soil and crop samples employing neutron activation analysis and energy dispersive X-ray fluorescence technique","authors":"Vaishali Dadwal ,&nbsp;Deep Shikha ,&nbsp;Sonika Gupta ,&nbsp;Aditi Dalvi ,&nbsp;Vimal Mehta ,&nbsp;R. Acharya","doi":"10.1016/j.apradiso.2025.111947","DOIUrl":"10.1016/j.apradiso.2025.111947","url":null,"abstract":"<div><div>This research work investigates into the elemental distribution within arable soil and locally collected crop samples from farmers of Nawanshahr region of Punjab, offering insights into nutrient concentration, potential contamination, and their impact on agricultural sustainability. Crop and soil samples were collected from 10 selected agricultural sites at Nawanshahr region of Punjab and subsequently analyzed using radioanalytical technique; Instrumental Neutron Activation Analysis (INAA) via the Pneumatic Carrier Facility (PCF) at BARC, Mumbai and Energy Dispersive X-ray Fluorescence (ED-XRF). These methodologies enabled precise quantification of essential elements: Al, Fe, Na, K, Ca, Mg, Mn and Zn, revealing distribution patterns in soil and crop samples. In soil, the concentration value followed: Al &gt; Fe &gt; Na &gt; K &gt; Ca &gt; Mg &gt; Mn &gt; Zn, while in crops, it shifted to Al &gt; Ca &gt; Fe &gt; Na &gt; Mg &gt; Zn &gt; Mn. Upon analysis, a strong correlation was observed between soil and crop elemental concentrations, for zinc (Zn) showing the highest uptake efficiency from soil to plant. However, other elements such as Fe, Mn, Na and Al exhibited insignificant relationships. It was also observed that Zn accumulation has an impact on crop yield productivity. To assess elemental accumulation in soil samples, the Contamination Factor (CF) was calculated, highlighting the accumulation of Ca and Zn in arable soil. The limit of detection values obtained for crop and soil samples using ED-XRF were also evaluated, underscoring the importance of assessing both major and minor elements to enhance soil and crop quality, thereby fostering sustainable agriculture and ensuring long-term food security.</div></div>","PeriodicalId":8096,"journal":{"name":"Applied Radiation and Isotopes","volume":"224 ","pages":"Article 111947"},"PeriodicalIF":1.6,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144184528","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigation of experimental and simulated gamma ray shielding features of pure Sm2O3 and yttrium doped Sm2O3 nanoparticles","authors":"Amir Reza Khoshhal ,&nbsp;Shahin Kookaeyan ,&nbsp;Abbas Bagheri Khatibani ,&nbsp;Alireza Azadbar","doi":"10.1016/j.apradiso.2025.111946","DOIUrl":"10.1016/j.apradiso.2025.111946","url":null,"abstract":"<div><div>In recent years, the development of alternative materials to lead for environmentally friendly and non-toxic radiation shielding has garnered significant interest. This study focuses on synthesizing pure samarium oxide (Sm₂O₃) and yttrium-doped Sm₂O₃ nanostructures (with 10 % and 20 % yttrium) using the sol-gel method as potential lead-free radiation shielding materials. The structural, optical, and morphological properties were analyzed using Energy Dispersive X-ray Spectroscopy (EDS), X-ray Diffraction (XRD), Diffuse Reflectance Spectroscopy (DRS), Fourier Transform Infrared Spectroscopy (FTIR), Photoluminescence Spectroscopy (PL) and Field Emission Scanning Electron Microscopy (FESEM). XRD confirmed a cubic crystal structure for Sm₂O₃, with yttrium incorporation causing slight structural modifications. FESEM images highlighted the interaction between yttrium nanoplates and Sm₂O₃ nanorods, while EDS confirmed the expected elemental composition. Key gamma shielding parameters—including mean free path (MFP), mass attenuation coefficients (MAC), linear attenuation coefficients (LAC), transmission factor (TF), tenth value layer (TVL), half value layer (HVL) and radiation protection efficiency (RPE) —were experimentally measured and simulated using GEometry ANd Tracking (GEANT4) toolkit. The results demonstrated that the addition of yttrium enhanced radiation shielding performance. The LAC values for pure Sm₂O₃ (SY0), 10 % (SY1) and 20 % (SY2) yttrium-doped samples were 2.1070, 2.1622 and 2.2058, respectively. The HVL, TVL, MFP and TF exhibited a decreasing trend. The GEANT4 simulations confirmed these findings, showing gamma attenuation percentages of 25.21 %, 25.79 % and 26.24 % for the respective samples. The study suggests that Sm₂O₃/yttrium composites can serve as efficient gamma shielding materials.</div></div>","PeriodicalId":8096,"journal":{"name":"Applied Radiation and Isotopes","volume":"224 ","pages":"Article 111946"},"PeriodicalIF":1.6,"publicationDate":"2025-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144154666","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis of aluminum-bismuth alloys and determination of their shielding capacity against ionizing energies","authors":"Maximiliano Díaz Molina,&nbsp;J. Rafael Molina Contreras","doi":"10.1016/j.apradiso.2025.111941","DOIUrl":"10.1016/j.apradiso.2025.111941","url":null,"abstract":"<div><div>In this work are reported five Al/Bi synthetized alloys with 10, 30, 50, 70 and 90 % of bismuth. XCOM calculations suggest the best shielding capacity for the sample made with 50Al/50Bi. Half value layer results compared with a pure Aluminum sample show reduction in thickness higher than 65 % for photon energies from 1 to 100 keV. These results suggest that 50Al/50Bi can be used as shielding barrier in mammography, dental machines, bone x-rays and cancer treatment in the medical field.</div></div>","PeriodicalId":8096,"journal":{"name":"Applied Radiation and Isotopes","volume":"224 ","pages":"Article 111941"},"PeriodicalIF":1.6,"publicationDate":"2025-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144139592","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of Ce3+ doping on the structural, optical, and dosimetric properties of magnesium-borate glasses","authors":"Gerardo R. Barrera ,&nbsp;Adriel S. Almeida ,&nbsp;Bruno M. Vidigal ,&nbsp;Anderson M.B. Silva ,&nbsp;Matheus C.S. Nunes ,&nbsp;Andrea L.F. Novais ,&nbsp;Neilo M. Trindade ,&nbsp;Divanizia N. Souza","doi":"10.1016/j.apradiso.2025.111942","DOIUrl":"10.1016/j.apradiso.2025.111942","url":null,"abstract":"<div><div>Ce³⁺ doped magnesium-borate glasses with compositions 80MgB₂O₄-20MgB₄O₇:xCe and 60MgB₂O₄-40MgB₄O₇:xCe (where x = 0.10, 0.30, 0.50, 0.70, and 0.90 wt%), were successfully synthesized using the melt quenching method. The physical, structural, and luminescent properties of the glasses were systematically investigated through density measurements, X-ray diffraction (XRD), differential scanning calorimetry (DSC), optical absorption, spectrofluorometry, and optically stimulated luminescence (OSL). XRD patterns confirmed the amorphous nature of the glasses, while DSC provided insights into their thermal stability and phase transition behavior. The thermal stability of the 60 MBO matrix was found to be higher than that of the 80 MBO glass. An increase in glass density with higher Ce³⁺ concentrations was observed, accompanied by a reduction in molar volume. The indirect and direct optical band gap decreased with increasing Ce³⁺ content, correlating with the observed decrease in molar volume. Photoluminescence studies revealed emissions associated with Ce³⁺ ions incorporated into the glass matrix. Additionally, OSL measurements demonstrated the dose-response behavior of the glasses over the range of 0.02–5 Gy. Particularly, the 60MBO glass composition exhibited superior sensitivity to ionizing radiation compared to the 80MBO composition. The OSL signal of the 60MGO glass fades significantly within a few days. Long-term stability of the OSL signal should be a goal for new studies on these glasses.</div></div>","PeriodicalId":8096,"journal":{"name":"Applied Radiation and Isotopes","volume":"224 ","pages":"Article 111942"},"PeriodicalIF":1.6,"publicationDate":"2025-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144139593","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact of diorites and feldspars on soil radioactivity: Evidence from university city of the Universidad Nacional Mayor de San Marcos and the National Institute of Neoplastic Diseases","authors":"E.G. Villarreyes Peña ,&nbsp;G. Patiño Camargo ,&nbsp;P. Mendoza ,&nbsp;O. Baltuano Elias","doi":"10.1016/j.apradiso.2025.111923","DOIUrl":"10.1016/j.apradiso.2025.111923","url":null,"abstract":"&lt;div&gt;&lt;div&gt;This study represents the first systematic measurement of environmental radiation in the University City of the Universidad Nacional Mayor de San Marcos (UNMSM) and the National Institute of Neoplastic Diseases (INEN) in the city of Lima, Peru, conducted between July, December 2022, and January 2023. Natural radioactivity levels and absorbed dose rates in soil samples were determined by using gamma spectroscopy with a high purity germanium detector (HPGe) semiconductor detector with 150 % efficiency.&lt;/div&gt;&lt;div&gt;At UNMSM, the following results were obtained for the activity concentrations (A) of the four main naturally occurring radioactive materials NORM (&lt;sup&gt;238&lt;/sup&gt;U, &lt;sup&gt;226&lt;/sup&gt;Ra, &lt;sup&gt;232&lt;/sup&gt;Th, and &lt;sup&gt;40&lt;/sup&gt;K): &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;msub&gt;&lt;mi&gt;A&lt;/mi&gt;&lt;mrow&gt;&lt;mi&gt;U&lt;/mi&gt;&lt;mn&gt;238&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;mo&gt;=&lt;/mo&gt;&lt;mn&gt;24.2&lt;/mn&gt;&lt;mo&gt;±&lt;/mo&gt;&lt;mn&gt;3.4&lt;/mn&gt;&lt;mspace&gt;&lt;/mspace&gt;&lt;mi&gt;B&lt;/mi&gt;&lt;mi&gt;q&lt;/mi&gt;&lt;msup&gt;&lt;mrow&gt;&lt;mspace&gt;&lt;/mspace&gt;&lt;mi&gt;k&lt;/mi&gt;&lt;mi&gt;g&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mo&gt;−&lt;/mo&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;, &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;msub&gt;&lt;mi&gt;A&lt;/mi&gt;&lt;mrow&gt;&lt;mi&gt;R&lt;/mi&gt;&lt;mi&gt;a&lt;/mi&gt;&lt;mn&gt;226&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;mo&gt;=&lt;/mo&gt;&lt;mn&gt;28.8&lt;/mn&gt;&lt;mo&gt;±&lt;/mo&gt;&lt;mn&gt;0.7&lt;/mn&gt;&lt;mspace&gt;&lt;/mspace&gt;&lt;mi&gt;B&lt;/mi&gt;&lt;mi&gt;q&lt;/mi&gt;&lt;mspace&gt;&lt;/mspace&gt;&lt;msup&gt;&lt;mrow&gt;&lt;mi&gt;k&lt;/mi&gt;&lt;mi&gt;g&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mo&gt;−&lt;/mo&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;, &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;msub&gt;&lt;mi&gt;A&lt;/mi&gt;&lt;mrow&gt;&lt;mi&gt;T&lt;/mi&gt;&lt;mi&gt;h&lt;/mi&gt;&lt;mn&gt;232&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;mo&gt;=&lt;/mo&gt;&lt;mn&gt;39.4&lt;/mn&gt;&lt;mo&gt;±&lt;/mo&gt;&lt;mn&gt;1.2&lt;/mn&gt;&lt;mspace&gt;&lt;/mspace&gt;&lt;mi&gt;B&lt;/mi&gt;&lt;mi&gt;q&lt;/mi&gt;&lt;mspace&gt;&lt;/mspace&gt;&lt;msup&gt;&lt;mrow&gt;&lt;mi&gt;k&lt;/mi&gt;&lt;mi&gt;g&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mo&gt;−&lt;/mo&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt; and &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;msub&gt;&lt;mi&gt;A&lt;/mi&gt;&lt;mrow&gt;&lt;mi&gt;K&lt;/mi&gt;&lt;mn&gt;40&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;mo&gt;=&lt;/mo&gt;&lt;mn&gt;539&lt;/mn&gt;&lt;mo&gt;±&lt;/mo&gt;&lt;mn&gt;7&lt;/mn&gt;&lt;mspace&gt;&lt;/mspace&gt;&lt;mi&gt;B&lt;/mi&gt;&lt;mi&gt;q&lt;/mi&gt;&lt;msup&gt;&lt;mrow&gt;&lt;mspace&gt;&lt;/mspace&gt;&lt;mi&gt;k&lt;/mi&gt;&lt;mi&gt;g&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mo&gt;−&lt;/mo&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;. We find the absorbed dose rate of &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mn&gt;57.5&lt;/mn&gt;&lt;mspace&gt;&lt;/mspace&gt;&lt;mi&gt;n&lt;/mi&gt;&lt;mi&gt;G&lt;/mi&gt;&lt;msup&gt;&lt;mrow&gt;&lt;mi&gt;y&lt;/mi&gt;&lt;mspace&gt;&lt;/mspace&gt;&lt;mi&gt;h&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mo&gt;−&lt;/mo&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt; and an annual effective dose equivalent of &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mn&gt;0.28&lt;/mn&gt;&lt;mspace&gt;&lt;/mspace&gt;&lt;mi&gt;m&lt;/mi&gt;&lt;mi&gt;S&lt;/mi&gt;&lt;mi&gt;v&lt;/mi&gt;&lt;mspace&gt;&lt;/mspace&gt;&lt;msup&gt;&lt;mi&gt;y&lt;/mi&gt;&lt;mrow&gt;&lt;mo&gt;−&lt;/mo&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;. On the other hand, at INEN, the following activity concentrations of NORM were found: &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;msub&gt;&lt;mi&gt;A&lt;/mi&gt;&lt;mrow&gt;&lt;mi&gt;U&lt;/mi&gt;&lt;mn&gt;238&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;mo&gt;=&lt;/mo&gt;&lt;mn&gt;26.0&lt;/mn&gt;&lt;mo&gt;±&lt;/mo&gt;&lt;mn&gt;3.4&lt;/mn&gt;&lt;mspace&gt;&lt;/mspace&gt;&lt;mi&gt;B&lt;/mi&gt;&lt;mi&gt;q&lt;/mi&gt;&lt;msup&gt;&lt;mrow&gt;&lt;mspace&gt;&lt;/mspace&gt;&lt;mi&gt;k&lt;/mi&gt;&lt;mi&gt;g&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mo&gt;−&lt;/mo&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;, &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;msub&gt;&lt;mi&gt;A&lt;/mi&gt;&lt;mrow&gt;&lt;mi&gt;R&lt;/mi&gt;&lt;mi&gt;a&lt;/mi&gt;&lt;mn&gt;226&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;mo&gt;=&lt;/mo&gt;&lt;mn&gt;27.9&lt;/mn&gt;&lt;mo&gt;±&lt;/mo&gt;&lt;mn&gt;0.8&lt;/mn&gt;&lt;mspace&gt;&lt;/mspace&gt;&lt;mi&gt;B&lt;/mi&gt;&lt;mi&gt;q&lt;/mi&gt;&lt;mspace&gt;&lt;/mspace&gt;&lt;msup&gt;&lt;mrow&gt;&lt;mi&gt;k&lt;/mi&gt;&lt;mi&gt;g&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mo&gt;−&lt;/mo&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;, &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;msub&gt;&lt;mi&gt;A&lt;/mi&gt;&lt;mrow","PeriodicalId":8096,"journal":{"name":"Applied Radiation and Isotopes","volume":"224 ","pages":"Article 111923"},"PeriodicalIF":1.6,"publicationDate":"2025-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144168682","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study of the application of the deformed dose summation (DDS) method in brachytherapy for advanced cervical cancer and analysis of regional dosing in recurrent cervical cancer","authors":"Hongling Xie ,&nbsp;Jiping Liu ,&nbsp;Long Sun ,&nbsp;Tieming Xie","doi":"10.1016/j.apradiso.2025.111945","DOIUrl":"10.1016/j.apradiso.2025.111945","url":null,"abstract":"<div><h3>Purpose</h3><div>This study evaluated the cumulative brachytherapy (BT) dose in cervical cancer using different methods and explored using deformed dose summation (DDS) techniques for assessing doses to targets and organs at risk (OAR).</div></div><div><h3>Methods</h3><div>A total of 41 patients with cervical cancer who underwent BT were retrospectively analyzed, the cumulative dose, measured as the equivalent dose in 2 Gy fractions, was calculated using dose–volume histogram (DVH) superposition and DDS methods. The dice similarity coefficient (DSC), Jaccard coefficient (JC), and mean distance to agreement (MDA) were utilized to evaluate the deformable image registration (DIR) accuracy. Furthermore, the difference between the target and OAR doses obtained through the two methods was calculated and compared. The Spearman method was employed to analyze dose differences and geometric correlations, comparing the dose in the relapsing area with that in the post-fusion high-risk clinical target volume (HR-CTV) in patients experiencing relapse to identify potential associations.</div></div><div><h3>Results</h3><div>In evaluating deformable registration, the registration outcomes for both the bladder and rectum were deemed satisfactory. The DSC, JC, and MDA values for the bladder and rectum were calculated as follows: 0.89 ± 0.07, 0.81 ± 0.09, 2.14 ± 1.44 mm and 0.80 ± 0.08, 0.67 ± 0.10, 2.28 ± 1.80 mm, respectively. Compared to DVH superposition, DDS techniques reduced the average cumulative doses of the D2cc and D0.1 cc of bladder by 11.4 % and 8.2 %, respectively; and the doses of the D2cc and D0.1 cc of rectum to be decreased by 9.7 % and 14.1 %, respectively. Additionally, the D90 of HR-CTV and Intermediate risk CTV (IR-CTV) were reduced by 6.60 ± 3.70 Gy and 4.55 ± 2.70 Gy, respectively. No significant correlation was observed between DSC, JC, and MDA and the dose difference. No correlation was observed between the relapsing regional dose and the dose parameters related to the HRCTV following fusion.</div></div><div><h3>Conclusions</h3><div>Calculating the cumulative dose using DVH parameters is a conservative approach that may limit target dose enhancement. During planning, DIR can guide clinicians in selecting the target dose and visually display the cumulative dose distribution in the cervical target area.</div></div>","PeriodicalId":8096,"journal":{"name":"Applied Radiation and Isotopes","volume":"224 ","pages":"Article 111945"},"PeriodicalIF":1.6,"publicationDate":"2025-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144155101","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Application of cadmium sulfide photoresistor and open-source software for X-ray detection in mammography","authors":"Pedro G.F.M. Paiva ,&nbsp;Vanessa M. Guimarães ,&nbsp;Cláudio D. de Almeida ,&nbsp;Josilene C. Santos","doi":"10.1016/j.apradiso.2025.111944","DOIUrl":"10.1016/j.apradiso.2025.111944","url":null,"abstract":"<div><div>The extensive use of ionizing radiation in several applications, specially X-rays in medicine, necessitates reliable detection systems for accurate measurement and control. The development of low-cost detectors is crucial to expanding access to these technologies. In this context, some approaches have been developed aiming to construct X-ray detection mechanisms utilizing cadmium sulfide (CdS), a photoconductive semiconductor, as a key material. This study investigates the feasibility of using a low-cost Light Dependent Resistor (LDR) sensor, made of CdS, integrated with a custom-made electronic system, for X-ray detection. The sensor was evaluated under various X-ray beam production parameters, such as tube voltage and exposure time, to assess its responsivity with both industrial and mammography X-ray devices. The detection system monitors variations in the electrical signal by detecting changes in the voltage drop across the LDR when exposed to X-rays. The results demonstrated a linear response at low voltages (up to 55 kVp) and an exponential response at higher voltages. Additionally, the system accurately measured exposure times, with deviations from the reference values of less than 2 %. Despite some experimental limitations, the detection system based on an LDR and Arduino has proven to be an effective tool and could contribute to the advancement of accessible radiation detection technologies.</div></div>","PeriodicalId":8096,"journal":{"name":"Applied Radiation and Isotopes","volume":"224 ","pages":"Article 111944"},"PeriodicalIF":1.6,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144139590","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluation of occupational doses in surgical staff via Monte Carlo simulation","authors":"Karen L. Machado ,&nbsp;Alessa Maschio ,&nbsp;Guilherme B. Guimarães ,&nbsp;William S. Santos ,&nbsp;Lucio P. Neves ,&nbsp;Ana P. Perini","doi":"10.1016/j.apradiso.2025.111894","DOIUrl":"10.1016/j.apradiso.2025.111894","url":null,"abstract":"<div><div>This study evaluated radiation exposure during fluoroscopy-guided surgical procedures using Monte Carlo simulations. The methodology involved modeling femoral osteosynthesis scenarios, representing both the patient and the occupationally exposed individual (OEI) with a female reference phantom from ICRP Publication 145. The study included 24 simulations, categorized into posteroanterior (PA) and lateral cross (LC) projections, with tube voltages ranging from 60 to 90 kV for PA and 70 to 100 kV for LC. Protective equipment, such as aprons, suspended glass, and curtains, was tested using alternative materials to lead, including bismuth and tungsten. The results demonstrated that bismuth and tungsten exhibited varying levels of radiation attenuation efficiency compared to lead, with performance expressed as percentages relative to lead-based equipment. While certain scenarios showed that bismuth and tungsten outperformed lead in radiation protection, other scenarios highlighted their limitations. For instance, at 90 kV in the PA projection, both materials resulted in significant increases in radiation dose compared to lead.</div></div>","PeriodicalId":8096,"journal":{"name":"Applied Radiation and Isotopes","volume":"224 ","pages":"Article 111894"},"PeriodicalIF":1.6,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144139595","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}