Radiological Physics and Technology最新文献_第5页

Imaging of scattered radiation sources in X-ray radiography using a semiconductor radiation visualization camera. 用半导体辐射可视化相机成像x射线摄影中的散射辐射源。

IF 1.7

Radiological Physics and Technology Pub Date : 2025-03-01 Epub Date: 2024-12-05 DOI: 10.1007/s12194-024-00865-z

Mayu Sakai, Toshioh Fujibuchi, Hyojin Lee, Donghee Han

引用次数: 0

Directional vector-based quick evaluation method for protective plate effects in X-ray fluoroscopy (DQPEX). 基于方向矢量的x射线透视保护板效果快速评价方法。

IF 1.7

Radiological Physics and Technology Pub Date : 2025-03-01 Epub Date: 2024-12-29 DOI: 10.1007/s12194-024-00873-z

Kyoko Hizukuri, Toshioh Fujibuchi, Donghee Han, Hiroyuki Arakawa, Takuya Furuta

{"title":"Directional vector-based quick evaluation method for protective plate effects in X-ray fluoroscopy (DQPEX).","authors":"Kyoko Hizukuri, Toshioh Fujibuchi, Donghee Han, Hiroyuki Arakawa, Takuya Furuta","doi":"10.1007/s12194-024-00873-z","DOIUrl":"10.1007/s12194-024-00873-z","url":null,"abstract":"One radiation protection measure for medical personnel in X-ray fluoroscopy is using radiation protective plates. A real-time interactive tool visualizing radiation-dose distribution varied with the protective plate position will help greatly to train medical personnel to protect themselves from unnecessary radiation exposure. Monte Carlo simulation can calculate the individual interactions between radiations and objects in the X-ray room, and reproduce the complex dose distribution inside the room. However, Monte Carlo simulation is computationally time-consuming and not suited for real-time feedback. Therefore, we developed a new method to calculate the dose distribution with the presence of protective plates instantly using pre-computed directional vectors, named Directional vector-based Quick evaluation method for Protective plates Effects in X-ray fluoroscopy (DQPEX). DQPEX uses a database of dose distributions and directional vectors precomputed by Monte Carlo code, Particle and Heavy Ion Transport code System (PHITS). Assuming the dose at each position was all contributed from radiations in the direction indicated by the directional vector, the dose reduction by the protective plates at the position was determined whether the backtrace line of the directional vector has a intersect with the protective plate or not. With DQPEX, the whole dose distribution in X-ray room with the presence of a protective plate can be computed about 13 s, which is approximately 1/6000 of the full PHITS simulation. Sufficient accuracy of DQPEX to visualize the effect of a protective plate was confirmed by comparing the obtained dose distribution with those obtained by the full PHITS simulation and measurements.","PeriodicalId":46252,"journal":{"name":"Radiological Physics and Technology","volume":" ","pages":"196-208"},"PeriodicalIF":1.7,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142903810","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Anomaly detection scheme for lung CT images using vector quantized variational auto-encoder with support vector data description. 使用支持向量数据描述的向量量化变异自动编码器的肺部 CT 图像异常检测方案。

IF 1.7

Radiological Physics and Technology Pub Date : 2025-03-01 Epub Date: 2024-10-26 DOI: 10.1007/s12194-024-00851-5

Zhihui Gao, Ryohei Nakayama, Akiyoshi Hizukuri, Shoji Kido

{"title":"Anomaly detection scheme for lung CT images using vector quantized variational auto-encoder with support vector data description.","authors":"Zhihui Gao, Ryohei Nakayama, Akiyoshi Hizukuri, Shoji Kido","doi":"10.1007/s12194-024-00851-5","DOIUrl":"10.1007/s12194-024-00851-5","url":null,"abstract":"This study aims to develop an anomaly-detection scheme for lesions in CT images. Our database consists of lung CT images obtained from 1500 examinees. It includes 1200 normal and 300 abnormal cases. In this study, SVDD (Support Vector Data Description) mapping the normal latent variables into a hypersphere as small as possible on the latent space is introduced to VQ-VAE (Vector Quantized-Variational Auto-Encoder). VQ-VAE with SVDD is constructed from two encoders, two decoders, and an embedding space. The first encoder compresses the input image into the latent-variable map, whereas the second encoder maps the normal latent variables into a hypersphere as small as possible. The first decoder then up-samples the mapped latent variables into a latent-variable map with the original size. The second decoder finally reconstructs the input image from the latent-variable map replaced by the embedding representations. The data of each examinee is classified as abnormal or normal based on the anomaly score defined as the combination of the difference between the input image and the reconstructed image and the distance between the latent variables and the center of the hypersphere. The area under the ROC curve for VQ-VAE with SVDD was 0.76, showing an improvement when compared with the conventional VAE (0.63, p < .001). VQ-VAE with SVDD developed in this study can yield higher anomaly-detection accuracy than the conventional VAE. The proposed method is expected to be useful for identifying examinees with lesions and reducing interpretation time in CT screening.","PeriodicalId":46252,"journal":{"name":"Radiological Physics and Technology","volume":" ","pages":"17-26"},"PeriodicalIF":1.7,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11876203/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142510159","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evaluation of stopping power ratio of artificial breast implants for carbon-ion radiotherapy. 人工乳房植入物碳离子放射治疗停止功率比的评价。

IF 1.7

Radiological Physics and Technology Pub Date : 2025-03-01 Epub Date: 2024-12-04 DOI: 10.1007/s12194-024-00860-4

M Muranaka, M Sakai, T Ogano, Y Hoshino, M Nakao, K Yusa, T Suto, T Ohno

{"title":"Evaluation of stopping power ratio of artificial breast implants for carbon-ion radiotherapy.","authors":"M Muranaka, M Sakai, T Ogano, Y Hoshino, M Nakao, K Yusa, T Suto, T Ohno","doi":"10.1007/s12194-024-00860-4","DOIUrl":"10.1007/s12194-024-00860-4","url":null,"abstract":"The number of patients requiring breast reconstruction with artificial implants has been increasing, and so is the use of carbon-ion radiotherapy (CIRT). Consequently, a growing number of patients with artificial breast implants are expected to undergo CIRT. Because artificial breasts are composed of a silicone polymer gel with a silicon-oxygen backbone, which differs significantly from human tissues, the stopping power ratio for carbon beams cannot be accurately converted from CT values using standard CT-to-stopping power ratio tables (CT-SP tables). Incorrect stopping power ratios can lead to significant problems in CIRT, including erroneous calculations of carbon beam range. To address this, we measured the CT values and stopping power ratios of three commercial artificial breasts using a 380 MeV/u carbon beam. Our results revealed significant deviations from the CT-SP table values. For instance, calculations for treating lung cancer with incorrect stopping power ratios resulted in errors of approximately 5 mm in range calculations, adversely affecting dose distribution to the target. Although further studies with various products are needed, it is crucial to conduct thorough patient consultations and develop treatment plans using accurate stopping power ratios.","PeriodicalId":46252,"journal":{"name":"Radiological Physics and Technology","volume":" ","pages":"121-126"},"PeriodicalIF":1.7,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142773518","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Quantitative assessment of ¹⁶⁷Tm isotope production: experimental data analysis and model validation. 167Tm同位素产量的定量评估：实验数据分析和模型验证。

IF 1.7

Radiological Physics and Technology Pub Date : 2025-03-01 Epub Date: 2024-12-07 DOI: 10.1007/s12194-024-00862-2

Md Nurul Amin, A K M Rezaur Rahman, Muhammad Asif Zubair, Quazi Muhammad Rashed Nizam

{"title":"Quantitative assessment of 167Tm isotope production: experimental data analysis and model validation.","authors":"Md Nurul Amin, A K M Rezaur Rahman, Muhammad Asif Zubair, Quazi Muhammad Rashed Nizam","doi":"10.1007/s12194-024-00862-2","DOIUrl":"10.1007/s12194-024-00862-2","url":null,"abstract":"167Tm is an effective radioisotope for use in theragnostic purposes. This study aims to find the best alternative routes for producing 167Tm for appropriate cancer therapy and diagnostics. In this study, we comprehensively analyzed production cross-sections of 167Tm and investigated the behavior of these reactions using six different level density models and refined optical model potential (OMP) parameters with the nuclear reaction code TALYS 1.96. Using this code, we estimated the specific activity and production yield for promising production routes. For characterizing the 167Tm isotopes, the energy distribution of 167Tm was also analyzed for each prominent reaction by particle and heavy ion transport code system (PHITS). The maximum specific activity was estimated as 52.6-75.2 GBq/g with a production yield of 20.2-32.7 GBq/mAh for the route 169Tm(p,x)167Tm. The experimental value was reproduced with good agreement by TALYS adjusting different OMP parameters. 169Tm(p,x)167Tm is the alternative route for producing 167Tm, for which TALYS can reproduce the result more accurately.","PeriodicalId":46252,"journal":{"name":"Radiological Physics and Technology","volume":" ","pages":"104-120"},"PeriodicalIF":1.7,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142792648","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of obtaining medical records and laboratory data on the sensitivity of diagnostic imaging assessment by radiological technologists. 获取病历和实验室数据对放射技师诊断影像评估敏感性的影响。

IF 1.7

Radiological Physics and Technology Pub Date : 2025-03-01 Epub Date: 2025-01-16 DOI: 10.1007/s12194-025-00880-8

Norikazu Koori, Takahide Kato, Shohei Yamamoto, Mayumi Yasui, Kazuma Kurata, Takeshi Hasegawa, Fuminari Nishikawa, Masami Sugiyama, Reina Ishiguro, Yohei Takamatsu, Maho Higuchi, Hiroki Kobayashi, Hiroki Nakane, Hiraku Fuse, Kota Sasaki, Shin Miyakawa, Kenji Yasue, Masato Takahashi, Naoki Nosaka

{"title":"Influence of obtaining medical records and laboratory data on the sensitivity of diagnostic imaging assessment by radiological technologists.","authors":"Norikazu Koori, Takahide Kato, Shohei Yamamoto, Mayumi Yasui, Kazuma Kurata, Takeshi Hasegawa, Fuminari Nishikawa, Masami Sugiyama, Reina Ishiguro, Yohei Takamatsu, Maho Higuchi, Hiroki Kobayashi, Hiroki Nakane, Hiraku Fuse, Kota Sasaki, Shin Miyakawa, Kenji Yasue, Masato Takahashi, Naoki Nosaka","doi":"10.1007/s12194-025-00880-8","DOIUrl":"10.1007/s12194-025-00880-8","url":null,"abstract":"The purpose of this study is to clarify the influence of acquiring medical record information and laboratory data on the sensitivity of detecting imaging findings among Japanese radiological technologists (RTs). RTs were presented with patient's information in three distinct sequences for detecting imaging findings. True positives (TP) were identified and categorized into three groups: Group 1 (image + chief complaint), Group 2 (image + chief complaint + medical record), and Group 3 (image + chief complaint + medical record + laboratory data). Compared with Group 1, Groups 2 and 3 exhibited up to 8.3% and 16.7% higher sensitivity, respectively. Notably, Group 3 demonstrated up to 13.3% higher sensitivity than that of Group 2. Obtaining medical record information and laboratory data improved the sensitivity of imaging findings detected by RTs. This study provides valuable insights for optimizing diagnostic protocols and improving patient outcomes by leveraging supplementary clinical data to augment diagnostic accuracy.","PeriodicalId":46252,"journal":{"name":"Radiological Physics and Technology","volume":" ","pages":"337-345"},"PeriodicalIF":1.7,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143013617","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Pulsation artifact reduction using compressed sensitivity encoding in Gd-EOB-DTPA contrast-enhanced magnetic resonance imaging. 在 Gd-EOB-DTPA 对比增强磁共振成像中使用压缩灵敏度编码减少脉动伪影。

IF 1.7

Radiological Physics and Technology Pub Date : 2025-03-01 Epub Date: 2024-11-07 DOI: 10.1007/s12194-024-00858-y

Masafumi Nakamura, Yasuo Takatsu, Mutsumi Yoshizawa, Kenichiro Yamamura, Tosiaki Miyati

{"title":"Pulsation artifact reduction using compressed sensitivity encoding in Gd-EOB-DTPA contrast-enhanced magnetic resonance imaging.","authors":"Masafumi Nakamura, Yasuo Takatsu, Mutsumi Yoshizawa, Kenichiro Yamamura, Tosiaki Miyati","doi":"10.1007/s12194-024-00858-y","DOIUrl":"10.1007/s12194-024-00858-y","url":null,"abstract":"In Gd-EOB-DTPA-enhanced MRI, cardiac pulsation artifacts in the left lobe often hinder diagnosis, the image quality need to improve. This study aimed to reduce cardiac pulsation artifacts in Gd-EOB-DTPA-enhanced three-dimensional (3D) T1-weighted turbo-field echo (3D-T1TFE) using compressed sensitivity encoding (CS).For phantom evaluation, the cardiac phantom was manually operated using a metronome-synchronized apparatus, comprising a bag-valve mask, a breathing circuit, and a Jackson-Rees system. Transverse images of a liver phantom were acquired using enhanced T1 high-resolution isotropic volumetric excitation with CS (CS-eTHRIVE) and sensitivity encoding (S-eTHRIVE). For evaluation, images obtained during cardiac phantom operation were subtracted from those obtained when the phantom was stationary. Standard deviation (SD) of the difference images was used as the evaluation metric, and assessments were conducted based on changes in heart rate and TFE factor. For clinical image evaluation, artifacts in hepatobiliary phase images acquired 15 min after Gd-EOB-DTPA injection in the order of S-eTHRIVE and CS-eTHRIVE were visually evaluated at four levels. In heart-rate evaluation (40, 60, and 80 beats/min), CS-eTHRIVE revealed significantly lower SD values compared to S-eTHRIVE across all heart rates (P < 0.01), with no significant differences between heart rates. For TFE factor evaluation, CS-eTHRIVE with a factor of 35 exhibited the lowest SD, which was significantly different from all other groups (P < 0.01). In clinical image evaluation, CS-eTHRIVE achieved higher visual scores (mean ± SD: 3.72 ± 0.46) compared with S-eTHRIVE (2.72 ± 0.98, P < 0.01).CS reduced pulsation artifacts in Gd-EOB-DTPA-enhanced 3D-T1TFE.","PeriodicalId":46252,"journal":{"name":"Radiological Physics and Technology","volume":" ","pages":"86-93"},"PeriodicalIF":1.7,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142606819","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Computerized classification method for significant coronary artery stenosis on whole-heart coronary MRA using 3D convolutional neural networks with attention mechanisms. 基于三维卷积神经网络的全心冠状动脉MRA显著性冠状动脉狭窄计算机分类方法。

IF 1.7

Radiological Physics and Technology Pub Date : 2025-03-01 Epub Date: 2024-12-31 DOI: 10.1007/s12194-024-00875-x

Takuma Shiomi, Ryohei Nakayama, Akiyoshi Hizukuri, Masafumi Takafuji, Masaki Ishida, Hajime Sakuma

{"title":"Computerized classification method for significant coronary artery stenosis on whole-heart coronary MRA using 3D convolutional neural networks with attention mechanisms.","authors":"Takuma Shiomi, Ryohei Nakayama, Akiyoshi Hizukuri, Masafumi Takafuji, Masaki Ishida, Hajime Sakuma","doi":"10.1007/s12194-024-00875-x","DOIUrl":"10.1007/s12194-024-00875-x","url":null,"abstract":"This study aims to develop a computerized classification method for significant coronary artery stenosis on whole-heart coronary magnetic resonance angiography (WHCMRA) images using a 3D convolutional neural network (3D-CNN) with attention mechanisms. The dataset included 951 segments from WHCMRA images of 75 patients who underwent both WHCMRA and invasive coronary angiography (ICA). Forty-two segments with significant stenosis (luminal diameter reduction <math><mo>≥</mo></math> 75%) on ICA were annotated on WHCMRA images by an experienced radiologist, whereas 909 segments without it were annotated at representative sites. Volumes of interest (VOIs) of 21 × 21 × 21 voxels centered on annotated points were extracted. The network comprises two feature extractors, two attention mechanisms (for the coronary artery and annotated points), and a classifier. The feature extractors first extracted the feature maps from the VOI. The two attention mechanisms weighted the feature maps of the coronary artery and those the neighborhood of the annotated point, respectively. The classifier finally classified the VOIs into those with and without significant coronary artery stenosis. Using fivefold cross-validation, the classification accuracy, sensitivity, specificity, and AUROC (area under the receiver operating characteristic curve) were 0.875, 0.905, 0.873, and 0.944, respectively. The proposed method showed high classification performance for significant coronary artery stenosis and appears to have a substantial impact on the interpretation of WHCMRA images.","PeriodicalId":46252,"journal":{"name":"Radiological Physics and Technology","volume":" ","pages":"219-226"},"PeriodicalIF":1.7,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142910920","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

IF 1.7

Radiological Physics and Technology Pub Date : 2025-03-01 Epub Date: 2025-01-07 DOI: 10.1007/s12194-024-00869-9

Kazutaka Hoyoshi, Kazuhiro Sato, Noriyasu Homma, Issei Mori

{"title":"Noise-related inaccuracies in the quantitative evaluation of CT artifacts.","authors":"Kazutaka Hoyoshi, Kazuhiro Sato, Noriyasu Homma, Issei Mori","doi":"10.1007/s12194-024-00869-9","DOIUrl":"10.1007/s12194-024-00869-9","url":null,"abstract":"Accuracies of measuring the artifact index (AI), a quantitative artifact evaluation index in X-ray CT images, were investigated. The AI is calculated based not only on the standard deviation (SD) of the artifact area in the image, but also on the SD of noise components for considering the noise influence. However, conventional measurement methods may not follow this consideration, for example the non-uniformity of the noise distribution is not taken into account, resulting in reducing the accuracy of AI. To address this problem, this study aims to clarify the impact of noise SD measuring (NSDM) error on AI accuracy and improve the accuracy by reducing the NSDM error. Experimental results demonstrated that the conventional noise measurement methods reduced the accuracy of the AI. Specifically, AI inaccuracy due to the NSDM error is severe in the case of weak artifacts and under high noise conditions. Furthermore, the AI accuracy can be improved by reducing the influence of the NSDM error through image smoothing or by correcting NSDM through noise distribution estimation. These results showed that AI can be affected by NSDM errors practically even though it is robust against noise in principle. The impact of NSDM errors must be avoided for reliable artifact evaluation.","PeriodicalId":46252,"journal":{"name":"Radiological Physics and Technology","volume":" ","pages":"157-171"},"PeriodicalIF":1.7,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142956534","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Non-lead flexible composite shields efficiency in decreasing dose in chest CT scan imaging. 无铅柔性复合屏蔽在胸部CT扫描成像中的降剂量效果。

IF 1.7

Radiological Physics and Technology Pub Date : 2025-02-25 DOI: 10.1007/s12194-025-00885-3

Mahdi Mansoori Kia, Soheila Refahi, Parinaz Mehnati, Reza Malekzadeh, Aarefeh Jafarzadeh Kohneloo

{"title":"Non-lead flexible composite shields efficiency in decreasing dose in chest CT scan imaging.","authors":"Mahdi Mansoori Kia, Soheila Refahi, Parinaz Mehnati, Reza Malekzadeh, Aarefeh Jafarzadeh Kohneloo","doi":"10.1007/s12194-025-00885-3","DOIUrl":"https://doi.org/10.1007/s12194-025-00885-3","url":null,"abstract":"Lead-based radiation shielding used usually in radiology departments is being replaced by non-lead shields due to concerns over toxicity, high weight, and the impossibility of applying it in the imaging field. New studies refer to the use of nanomaterials and lightweight polymer-based composites as an alternative that can solve the problems caused by lead shields. The study aims to develop a flexible composite shield for CT scan imaging and examine its effectiveness in reducing radiation exposure. This study involved the construction of 1 mm thick composite shields used in chest CT scan imaging. The first type consisted of 10% bismuth oxide, the second type consisted of 10% tungsten, the third type consisted of 5% bismuth oxide and 5% tungsten, and 90% of the rest of the structure of all shields was silicone. This study examined the morphological test, tensile strength test, attenuation efficiency, and image quality assessment of these shields. The radiation transmission coefficient for 10% bismuth, 10% tungsten and 5% bismuth-5%tungsten shields was obtained as 0.86, 0.80, and 0.83, respectively. Also, the noise increasing percentage for mentioned shields were 6, 4, and 6%, respectively, compared to the case without a shield. The study found that the 10% tungsten-90% silicone shield is the most effective in reducing radiation exposure due to its K-edge and attenuation coefficients. According to the noise assessment, using these shields does not significantly affect the quality of images.","PeriodicalId":46252,"journal":{"name":"Radiological Physics and Technology","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143494043","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0