Nihon Hoshasen Gijutsu Gakkai zasshi最新文献

英文中文

[Estimation of Uncertainty of the VMAT Absolute Dose Measurement Due to the Phantom Setup Error Using a Treatment Planning System]. [使用治疗计划系统估算因模型设置误差导致的 VMAT 绝对剂量测量不确定性]。

Nihon Hoshasen Gijutsu Gakkai zasshi

Pub Date : 2024-04-20 Epub Date: 2024-03-05 DOI: 10.6009/jjrt.2024-1371

Tadahiro Mizoguchi, Yuji Tameshige, Tatsuya Kaneda, Yoshiji Ogawa, Yoshiyuki Muranaka, Hiroyasu Tamamura

Purpose: When performing single-point dose verification in VMAT, it is necessary to avoid the regions with steep dose gradient. We propose a method to obtain the estimated value ( U_plan) of uncertainty of the absolute dose measurement due to the phantom setup error by using dose gradient calculated from treatment planning system (TPS), for evaluating the appropriate measurement points.

Methods: The dose gradient was calculated from the planned dose values in the vicinity of the isocenter point using TPS. The phantom setup error was estimated. The U_plan was calculated using the proposed formula after estimating the phantom setup error. Then, the dose gradient was calculated from the measured dose values in the vicinity of the isocenter point specified by TPS using the Tough water phantom with ionization chamber (IC), and U_meas was calculated as in U_plan.

Results: The correlation coefficient between U_plan and U_meas was 0.984, which indicates a high correlation. The average of the difference between U_meas and U_plan was -0.24%. We considered that this result was caused by the influence of volume averaging effect of IC.

Conclusion: The U_plan obtained from this proposed method reflects the uncertainty of the absolute dose measurement due to the phantom setup error and is useful for evaluating the appropriate measurement points for absolute dose measurement.

目的：在 VMAT 中进行单点剂量验证时，有必要避开剂量梯度陡峭的区域。我们提出了一种方法，利用治疗计划系统（TPS）计算出的剂量梯度，获得由模型设置误差引起的绝对剂量测量不确定性估计值（Uplan），以评估合适的测量点：方法：使用 TPS 根据等中心点附近的计划剂量值计算剂量梯度。估计模型设置误差。在估算出模型设置误差后，使用建议的公式计算 Uplan。然后，使用带电离室（IC）的韧水模型，根据 TPS 指定的等中心点附近的测量剂量值计算剂量梯度，Umeas 的计算与 Uplan 相同：结果：Uplan 与 Umeas 之间的相关系数为 0.984，表明两者之间具有很高的相关性。Umeas 和 Uplan 之间的平均差值为-0.24%。我们认为这一结果是由集成电路的体积平均效应影响造成的：结论：该方法得到的 Uplan 反映了由于模型设置误差造成的绝对剂量测量的不确定性，有助于评估绝对剂量测量的适当测量点。

{"title":"[Estimation of Uncertainty of the VMAT Absolute Dose Measurement Due to the Phantom Setup Error Using a Treatment Planning System].","authors":"Tadahiro Mizoguchi, Yuji Tameshige, Tatsuya Kaneda, Yoshiji Ogawa, Yoshiyuki Muranaka, Hiroyasu Tamamura","doi":"10.6009/jjrt.2024-1371","DOIUrl":"10.6009/jjrt.2024-1371","url":null,"abstract":"Purpose: When performing single-point dose verification in VMAT, it is necessary to avoid the regions with steep dose gradient. We propose a method to obtain the estimated value ( Uplan) of uncertainty of the absolute dose measurement due to the phantom setup error by using dose gradient calculated from treatment planning system (TPS), for evaluating the appropriate measurement points.Methods: The dose gradient was calculated from the planned dose values in the vicinity of the isocenter point using TPS. The phantom setup error was estimated. The Uplan was calculated using the proposed formula after estimating the phantom setup error. Then, the dose gradient was calculated from the measured dose values in the vicinity of the isocenter point specified by TPS using the Tough water phantom with ionization chamber (IC), and Umeas was calculated as in Uplan.Results: The correlation coefficient between Uplan and Umeas was 0.984, which indicates a high correlation. The average of the difference between Umeas and Uplan was -0.24%. We considered that this result was caused by the influence of volume averaging effect of IC.Conclusion: The Uplan obtained from this proposed method reflects the uncertainty of the absolute dose measurement due to the phantom setup error and is useful for evaluating the appropriate measurement points for absolute dose measurement.","PeriodicalId":74309,"journal":{"name":"Nihon Hoshasen Gijutsu Gakkai zasshi","volume":" ","pages":"345-353"},"PeriodicalIF":0.0,"publicationDate":"2024-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140051204","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

[[Applications] 9. Development of an AI System for Liver Tumor Detection from Abdominal Ultrasound Images]. [应用] 9.开发从腹部超声图像检测肝脏肿瘤的人工智能系统]。

Nihon Hoshasen Gijutsu Gakkai zasshi

Pub Date : 2024-04-20 DOI: 10.6009/jjrt.2024-2347

Yusuke Ikeda, Yoshito Mekada

引用次数: 0

[Comments on "Evaluation on the Availability of the Electrometer Inspection by Users Using a Newly Developed Current Source"]. [对 "关于用户使用新开发的电流源进行电度表检测的可用性评估 "的评论].

Nihon Hoshasen Gijutsu Gakkai zasshi

Pub Date : 2024-04-20 Epub Date: 2024-02-20 DOI: 10.6009/jjrt.2024-2327

Morihito Shimizu

引用次数: 0

[The Study for Standardization of Dose Evaluation Method in Cone-beam CT]. [锥形束 CT 剂量评估方法标准化研究]。

Nihon Hoshasen Gijutsu Gakkai zasshi

Pub Date : 2024-04-20 Epub Date: 2024-02-28 DOI: 10.6009/jjrt.2024-1435

Ryo Nakayama, Kosuke Matsubara

Purpose: This study aimed to compare the dose evaluation methods by constructing simulation models using the Monte Carlo calculation code and propose an evaluation method for cone beam CT (CBCT) that ensures accuracy and practicality.

Methods: The Particle and Heavy Ion Transport code System (PHITS) ver. 3.26 was used as the Monte Carlo calculation code. CBCT doses were measured by CB dose index (CBDI) and American Association of Physicists in Medicine task group 111 (TG111) methods. The CBDI was compared with the equilibrium doses obtained by the TG111 method.

Results: Although CBDI was lower than equilibrium doses obtained by the TG111 method, its practicality was ensured because it can be measured using the dosimeter and phantom that are commonly used. In contrast, the TG111 method guarantees accuracy, but it is difficult to prepare a long phantom to obtain the equilibrium dose. The TG111 method with a phantom length of 15 cm underestimated the equilibrium dose by 20% compared to that with a phantom length of 45 cm that satisfies the dose equilibrium. Therefore, the equilibrium dose obtained by the TG111 method with a phantom length of 15 cm is multiplied by 1.20 to obtain the equilibrium dose equivalent to that with a phantom length of 45 cm.

Conclusion: This study has proposed the dose evaluation method that combines guarantees accuracy and practicality in CBCT.

目的：本研究旨在通过使用蒙特卡洛计算代码构建模拟模型，对剂量评估方法进行比较，并提出一种确保准确性和实用性的锥形束 CT（CBCT）评估方法：方法：采用粒子和重离子输运代码系统（PHITS）3.26 版作为蒙特卡洛计算模型。方法：使用粒子和重离子传输代码系统（PHITS）3.26 版作为蒙特卡罗计算代码。CBCT 剂量通过 CB 剂量指数（CBDI）和美国医学物理学家协会第 111 任务组（TG111）方法进行测量。CBDI 与 TG111 方法得出的平衡剂量进行了比较：尽管 CBDI 低于 TG111 方法获得的平衡剂量，但其实用性得到了保证，因为它可以使用常用的剂量计和模型进行测量。相比之下，TG111 方法虽然能保证精确度，但很难准备一个长模型来获得平衡剂量。与满足剂量平衡的 45 厘米幻影长度相比，15 厘米幻影长度的 TG111 方法低估了 20% 的平衡剂量。因此，用 TG111 方法得到的幻影长度为 15 厘米的平衡剂量乘以 1.20，就得到了相当于幻影长度为 45 厘米的平衡剂量：本研究提出的剂量评估方法兼顾了 CBCT 的准确性和实用性。

{"title":"[The Study for Standardization of Dose Evaluation Method in Cone-beam CT].","authors":"Ryo Nakayama, Kosuke Matsubara","doi":"10.6009/jjrt.2024-1435","DOIUrl":"10.6009/jjrt.2024-1435","url":null,"abstract":"Purpose: This study aimed to compare the dose evaluation methods by constructing simulation models using the Monte Carlo calculation code and propose an evaluation method for cone beam CT (CBCT) that ensures accuracy and practicality.Methods: The Particle and Heavy Ion Transport code System (PHITS) ver. 3.26 was used as the Monte Carlo calculation code. CBCT doses were measured by CB dose index (CBDI) and American Association of Physicists in Medicine task group 111 (TG111) methods. The CBDI was compared with the equilibrium doses obtained by the TG111 method.Results: Although CBDI was lower than equilibrium doses obtained by the TG111 method, its practicality was ensured because it can be measured using the dosimeter and phantom that are commonly used. In contrast, the TG111 method guarantees accuracy, but it is difficult to prepare a long phantom to obtain the equilibrium dose. The TG111 method with a phantom length of 15 cm underestimated the equilibrium dose by 20% compared to that with a phantom length of 45 cm that satisfies the dose equilibrium. Therefore, the equilibrium dose obtained by the TG111 method with a phantom length of 15 cm is multiplied by 1.20 to obtain the equilibrium dose equivalent to that with a phantom length of 45 cm.Conclusion: This study has proposed the dose evaluation method that combines guarantees accuracy and practicality in CBCT.","PeriodicalId":74309,"journal":{"name":"Nihon Hoshasen Gijutsu Gakkai zasshi","volume":" ","pages":"374-384"},"PeriodicalIF":0.0,"publicationDate":"2024-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139992065","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

[[Fundamentals] 8. Works on Mac or Windows! Practical Deep Learning with PyTorch]. [基础知识] 8.适用于 Mac 或 Windows！使用 PyTorch 进行实用深度学习].

Nihon Hoshasen Gijutsu Gakkai zasshi

Pub Date : 2024-04-20 DOI: 10.6009/jjrt.2024-2336

T. Hara

引用次数: 0

[Report of the Workshop for 2023 and Future Plans of X-Ray Leakage Measurement Expert Qualification for X-Ray Examination Rooms]. [X 射线检查室 X 射线泄漏测量专家资格认证 2023 年研讨会报告和未来计划]。

Nihon Hoshasen Gijutsu Gakkai zasshi

Pub Date : 2024-04-20 DOI: 10.6009/jjrt.2024-2344

Daisuke Kotani

引用次数: 0

[Nationwide Questionnaire Survey on Disaster Power Outage Countermeasures in the Radiology Departments of Hospitals]. [全国医院放射科灾难性停电对策问卷调查]。

Nihon Hoshasen Gijutsu Gakkai zasshi

Pub Date : 2024-04-08 DOI: 10.6009/jjrt.2024-1450

Hiroaki Suzuki, Yoshiaki Morishima, Joji Ota, Kazumasa Arai, Hisaya Sato, Eiji Ishikawa

PURPOSETo identify the countermeasures and current status of disaster power outages in the radiology departments of hospitals.METHODSA web-based questionnaire survey of 600 hospitals nationwide was conducted. The questionnaire survey covered 34 items, including availability of power in the radiology department in the event of a disaster and the impact of power outages on medical equipment in the radiology department.RESULTSIn all, 242 facilities (40.3%) responded to our survey. During power outages, 55.8%-68.2% of facilities were able to use CT, digital radiography, and angiography systems with their private generators. In 28.1%-40.7% of facilities, medical information systems were not available in all laboratories. In addition, power outages caused equipment malfunctions in 81.4% of facilities' radiology departments.CONCLUSIONWe have identified the power supplied by private generators to the radiology department's medical equipment and medical information systems. Many medical equipment have malfunctioned due to power outages. Therefore, drills should be conducted to simulate various situations caused by power outages.

目的确定医院放射科灾难性停电的对策和现状。方法对全国 600 家医院进行了网络问卷调查。问卷调查涉及 34 个项目，包括灾难发生时放射科的供电情况以及停电对放射科医疗设备的影响。在停电期间，55.8%-68.2% 的机构能够使用私人发电机进行 CT、数字射线照相和血管造影系统。在 28.1%-40.7% 的机构中，所有实验室都无法使用医疗信息系统。此外，81.4% 的医疗机构放射科因停电导致设备故障。许多医疗设备因停电而发生故障。因此，应进行模拟停电造成的各种情况的演习。

{"title":"[Nationwide Questionnaire Survey on Disaster Power Outage Countermeasures in the Radiology Departments of Hospitals].","authors":"Hiroaki Suzuki, Yoshiaki Morishima, Joji Ota, Kazumasa Arai, Hisaya Sato, Eiji Ishikawa","doi":"10.6009/jjrt.2024-1450","DOIUrl":"https://doi.org/10.6009/jjrt.2024-1450","url":null,"abstract":"PURPOSE\u0000To identify the countermeasures and current status of disaster power outages in the radiology departments of hospitals.\u0000\u0000\u0000METHODS\u0000A web-based questionnaire survey of 600 hospitals nationwide was conducted. The questionnaire survey covered 34 items, including availability of power in the radiology department in the event of a disaster and the impact of power outages on medical equipment in the radiology department.\u0000\u0000\u0000RESULTS\u0000In all, 242 facilities (40.3%) responded to our survey. During power outages, 55.8%-68.2% of facilities were able to use CT, digital radiography, and angiography systems with their private generators. In 28.1%-40.7% of facilities, medical information systems were not available in all laboratories. In addition, power outages caused equipment malfunctions in 81.4% of facilities' radiology departments.\u0000\u0000\u0000CONCLUSION\u0000We have identified the power supplied by private generators to the radiology department's medical equipment and medical information systems. Many medical equipment have malfunctioned due to power outages. Therefore, drills should be conducted to simulate various situations caused by power outages.","PeriodicalId":74309,"journal":{"name":"Nihon Hoshasen Gijutsu Gakkai zasshi","volume":"79 5‐6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140731785","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

[Validation of Quantitative Accuracy and Variability in 177Lu Imaging Using Monte Carlo Simulation]. [利用蒙特卡罗模拟验证 177Lu 成像的定量准确性和变异性]。

Nihon Hoshasen Gijutsu Gakkai zasshi

Pub Date : 2024-04-04 DOI: 10.6009/jjrt.2024-1451

H. Daisaki, C. Kubota, Kazuma Ishikawa, Mitsuru Sato, Yoshiaki Yasumoto, Shohei Fukai, Tetsuya Sakashita

PURPOSETo predict side effects and optimize injection doses in the dosimetry of 177Lu imaging, highly accurate quantitative SPECT images are required. Monte Carlo simulations were performed to verify the accuracy and variability of quantitative values for 177Lu imaging under various imaging conditions.METHODSPECT data of NEMA body phantom were assumed to simulate intrahepatic tumors 6 h after administration of 7.4 GBq of 177Lu-Dotatate. SPECT data were acquired using the SIMIND program with different combinations of collimators and energy windows. For variability evaluation, 30 SPECT images with Poisson noise were generated for each acquisition time. The relative error was evaluated for accuracy evaluation, and the coefficient of variation was estimated for variability evaluation.RESULTSThe accuracy of BG quantification was less than 10% relative error. The accuracy of hot sphere quantification was highest with the combination of MEGP and an energy window of 208 keV±10%. However, the accuracy of hot sphere quantification decreased significantly with decreasing hot sphere diameter. Variability varied with imaging conditions and improved with longer acquisition time.CONCLUSIONMonte Carlo simulations revealed the accuracy and variability of quantitative values for each SPECT imaging condition for 177Lu imaging.

目的为了预测副作用并优化 177Lu 成像剂量学中的注射剂量，需要高精度的定量 SPECT 图像。方法假定 NEMA 人体模型的 SPECT 数据模拟肝内肿瘤在注射 7.4 GBq 177Lu-Dotatate 6 小时后的情况。使用 SIMIND 程序，以不同的准直器和能量窗组合获取 SPECT 数据。为评估变异性，每次采集时间生成 30 幅带有泊松噪声的 SPECT 图像。结果BG定量的准确性低于10%的相对误差。结合 MEGP 和 208 keV±10% 的能量窗口，热球定量的准确度最高。然而，随着热球直径的减小，热球定量的准确性明显下降。结论蒙特卡洛模拟揭示了 177Lu 成像中每种 SPECT 成像条件下定量值的准确性和可变性。

{"title":"[Validation of Quantitative Accuracy and Variability in 177Lu Imaging Using Monte Carlo Simulation].","authors":"H. Daisaki, C. Kubota, Kazuma Ishikawa, Mitsuru Sato, Yoshiaki Yasumoto, Shohei Fukai, Tetsuya Sakashita","doi":"10.6009/jjrt.2024-1451","DOIUrl":"https://doi.org/10.6009/jjrt.2024-1451","url":null,"abstract":"PURPOSE\u0000To predict side effects and optimize injection doses in the dosimetry of 177Lu imaging, highly accurate quantitative SPECT images are required. Monte Carlo simulations were performed to verify the accuracy and variability of quantitative values for 177Lu imaging under various imaging conditions.\u0000\u0000\u0000METHOD\u0000SPECT data of NEMA body phantom were assumed to simulate intrahepatic tumors 6 h after administration of 7.4 GBq of 177Lu-Dotatate. SPECT data were acquired using the SIMIND program with different combinations of collimators and energy windows. For variability evaluation, 30 SPECT images with Poisson noise were generated for each acquisition time. The relative error was evaluated for accuracy evaluation, and the coefficient of variation was estimated for variability evaluation.\u0000\u0000\u0000RESULTS\u0000The accuracy of BG quantification was less than 10% relative error. The accuracy of hot sphere quantification was highest with the combination of MEGP and an energy window of 208 keV±10%. However, the accuracy of hot sphere quantification decreased significantly with decreasing hot sphere diameter. Variability varied with imaging conditions and improved with longer acquisition time.\u0000\u0000\u0000CONCLUSION\u0000Monte Carlo simulations revealed the accuracy and variability of quantitative values for each SPECT imaging condition for 177Lu imaging.","PeriodicalId":74309,"journal":{"name":"Nihon Hoshasen Gijutsu Gakkai zasshi","volume":"81 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140742448","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

[Effect of Reducing Fluoroscopy Pulse Rates on Visibility of Devices and Radiation Dose in Percutaneous Coronary Intervention]. [降低透视脉冲频率对经皮冠状动脉介入治疗中器械可见度和辐射剂量的影响]。

Nihon Hoshasen Gijutsu Gakkai zasshi

Pub Date : 2024-04-04 DOI: 10.6009/jjrt.2024-1396

Masato Yoshida, Masayoshi Niwa, Yasukata Takahashi, Yosuke Kuratani

The goal of our study was to clarify the effect of low pulse rate fluoroscopy applying in percutaneous coronary intervention (PCI) on devices' visibility and radiation dose. Four types of fluoroscopy conditions combined with two pulse rates (7.5 and 15 pulses/s) and two types of adaptive temporal filters (ATFs) (weak and strong) were used. Samples for visibility evaluation were acquired with moving phantom and devices such as stent, balloon, and guidewire. Trailing artifacts and the visibility of stent were evaluated by Scheffe's method of paired comparisons. Incident air kerma (Ka,r) and kerma area product (PKA) in the clinic were obtained under two fluoroscopic pulse rate conditions (7.5 and 15 pulses/s). As a result, in 7.5 pulses/s fluoroscopy, trailing artifacts were decreased by using weak ATF with the median value of PKA and Ka,r reduced by about 50%, but stent visibility was decreased compared to 15 pulses/s. Therefore, a combination of 7.5 pulses/s fluoroscopy and suitable ATF can bring dose reduction with avoiding trailing artifacts, but dose per pulse should be adjusted to maintain the stent visibility.

我们的研究旨在明确经皮冠状动脉介入治疗（PCI）中应用低脉冲速率透视对设备能见度和辐射剂量的影响。我们使用了四种透视条件，结合两种脉冲率（7.5 和 15 脉冲/秒）和两种自适应时间滤波器（ATF）（弱和强）。可视性评估的样本是用移动的模型和支架、球囊和导丝等设备采集的。采用 Scheffe 配对比较法对拖尾伪影和支架可见度进行评估。在两种透视脉冲速率条件下（7.5 脉冲/秒和 15 脉冲/秒），获得了临床中的入射空气热玛（Ka,r）和热玛面积乘积（PKA）。结果显示，在 7.5 脉冲/秒透视条件下，使用弱 ATF 可以减少拖尾伪影，PKA 和 Ka,r 的中值降低了约 50%，但与 15 脉冲/秒相比，支架能见度降低了。因此，7.5 脉冲/秒透视与合适的 ATF 组合可在避免拖尾伪影的同时减少剂量，但应调整每脉冲的剂量以保持支架的可见度。

{"title":"[Effect of Reducing Fluoroscopy Pulse Rates on Visibility of Devices and Radiation Dose in Percutaneous Coronary Intervention].","authors":"Masato Yoshida, Masayoshi Niwa, Yasukata Takahashi, Yosuke Kuratani","doi":"10.6009/jjrt.2024-1396","DOIUrl":"https://doi.org/10.6009/jjrt.2024-1396","url":null,"abstract":"The goal of our study was to clarify the effect of low pulse rate fluoroscopy applying in percutaneous coronary intervention (PCI) on devices' visibility and radiation dose. Four types of fluoroscopy conditions combined with two pulse rates (7.5 and 15 pulses/s) and two types of adaptive temporal filters (ATFs) (weak and strong) were used. Samples for visibility evaluation were acquired with moving phantom and devices such as stent, balloon, and guidewire. Trailing artifacts and the visibility of stent were evaluated by Scheffe's method of paired comparisons. Incident air kerma (Ka,r) and kerma area product (PKA) in the clinic were obtained under two fluoroscopic pulse rate conditions (7.5 and 15 pulses/s). As a result, in 7.5 pulses/s fluoroscopy, trailing artifacts were decreased by using weak ATF with the median value of PKA and Ka,r reduced by about 50%, but stent visibility was decreased compared to 15 pulses/s. Therefore, a combination of 7.5 pulses/s fluoroscopy and suitable ATF can bring dose reduction with avoiding trailing artifacts, but dose per pulse should be adjusted to maintain the stent visibility.","PeriodicalId":74309,"journal":{"name":"Nihon Hoshasen Gijutsu Gakkai zasshi","volume":"46 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140742986","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

[Temperature Dependence of Scintillation Survey Meter with and without Temperature Compensation Function]. [带温度补偿功能和不带温度补偿功能的闪烁测量仪的温度依赖性]。

Nihon Hoshasen Gijutsu Gakkai zasshi

Pub Date : 2024-03-20 Epub Date: 2024-02-05 DOI: 10.6009/jjrt.2024-1382

Miku Furukawa, Rio Isobe, Saya Ono, Yusaku Gonai, Ryota Shindo, Keisuke Yamamoto, Yohei Inaba, Koichi Chida

Purpose: The objective of this study was to compare the temperature dependence of a scintillation survey meter with and without the temperature compensation function. Investigation of temperature dependence is important to make precise measurements in various environments.

Method: The experiment was conducted using the NaI (Tl) scintillation survey meter with the temperature compensation function (TCS-1172) and the NaI (Tl) and CsI (Tl) scintillation survey meters without the temperature compensation function (TCS-171, PDR-111). In all, 1 cm dose equivalent rate (µSv/h) was measured by changing the room temperature from 10 to 40 degree Celsius.

Result: The results showed that the scintillation survey meter with the temperature compensation function had almost no change in the measured values with changes in room temperature, whereas the 1 cm dose equivalent rate of the scintillation survey meter without the temperature compensation function changed by a maximum of -7.2 (%/10°C) as temperature increased.

Conclusion: This study confirms that the scintillation survey meter with the temperature compensation function was less dependent on temperature, and stable measurement was possible. However, it was suggested that the scintillation survey meter without the temperature compensation function might cause a drop in the measured value as the temperature rises.

目的：本研究的目的是比较闪烁测量仪有无温度补偿功能的温度依赖性。研究温度依赖性对于在各种环境中进行精确测量非常重要：实验使用具有温度补偿功能的 NaI (Tl) 闪烁测量仪（TCS-1172）和不具有温度补偿功能的 NaI (Tl) 和 CsI (Tl) 闪烁测量仪（TCS-171、PDR-111）。将室温从 10 摄氏度变为 40 摄氏度时，测量了 1 厘米剂量当量率（µSv/h）：结果表明，具有温度补偿功能的闪烁测量仪的测量值几乎不随室温的变化而变化，而不具有温度补偿功能的闪烁测量仪的 1 厘米剂量当量率则随温度的升高而变化，最大变化幅度为-7.2（%/10°C）：这项研究证实，具有温度补偿功能的闪烁扫描仪对温度的依赖性较小，可以进行稳定的测量。不过，也有人认为，不带温度补偿功能的闪烁测量仪可能会在温度升高时导致测量值下降。

{"title":"[Temperature Dependence of Scintillation Survey Meter with and without Temperature Compensation Function].","authors":"Miku Furukawa, Rio Isobe, Saya Ono, Yusaku Gonai, Ryota Shindo, Keisuke Yamamoto, Yohei Inaba, Koichi Chida","doi":"10.6009/jjrt.2024-1382","DOIUrl":"10.6009/jjrt.2024-1382","url":null,"abstract":"Purpose: The objective of this study was to compare the temperature dependence of a scintillation survey meter with and without the temperature compensation function. Investigation of temperature dependence is important to make precise measurements in various environments.Method: The experiment was conducted using the NaI (Tl) scintillation survey meter with the temperature compensation function (TCS-1172) and the NaI (Tl) and CsI (Tl) scintillation survey meters without the temperature compensation function (TCS-171, PDR-111). In all, 1 cm dose equivalent rate (µSv/h) was measured by changing the room temperature from 10 to 40 degree Celsius.Result: The results showed that the scintillation survey meter with the temperature compensation function had almost no change in the measured values with changes in room temperature, whereas the 1 cm dose equivalent rate of the scintillation survey meter without the temperature compensation function changed by a maximum of -7.2 (%/10°C) as temperature increased.Conclusion: This study confirms that the scintillation survey meter with the temperature compensation function was less dependent on temperature, and stable measurement was possible. However, it was suggested that the scintillation survey meter without the temperature compensation function might cause a drop in the measured value as the temperature rises.","PeriodicalId":74309,"journal":{"name":"Nihon Hoshasen Gijutsu Gakkai zasshi","volume":" ","pages":"279-286"},"PeriodicalIF":0.0,"publicationDate":"2024-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139708764","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

首页上一页

下一页尾页

类型

全部化学•材料生命科学医学物理工程技术环境•农林材料科学地球科学法学管理学化学环境科学与生态学计算机科学教育学经济学农林科学人文科学生物学数学物理与天体物理心理学综合性期刊其他工业工程理学历史学农学文学信息工程

数据库

全部 ACS Publications Elsevier ieeexplore Springer The Royal Society of Chemistry Wiley

期刊

Nihon Hoshasen Gijutsu Gakkai zasshi

全部 Acc. Chem. Res. ACS Applied Bio Materials ACS Appl. Electron. Mater. ACS Appl. Energy Mater. ACS Appl. Mater. Interfaces ACS Appl. Nano Mater. ACS Appl. Polym. Mater. ACS BIOMATER-SCI ENG ACS Catal. ACS Cent. Sci. ACS Chem. Biol. ACS Chemical Health & Safety ACS Chem. Neurosci. ACS Comb. Sci. ACS Earth Space Chem. ACS Energy Lett. ACS Infect. Dis. ACS Macro Lett. ACS Mater. Lett. ACS Med. Chem. Lett. ACS Nano ACS Omega ACS Photonics ACS Sens. ACS Sustainable Chem. Eng. ACS Synth. Biol. Anal. Chem. BIOCHEMISTRY-US Bioconjugate Chem. BIOMACROMOLECULES Chem. Res. Toxicol. Chem. Rev. Chem. Mater. CRYST GROWTH DES ENERG FUEL Environ. Sci. Technol. Environ. Sci. Technol. Lett. Eur. J. Inorg. Chem. IND ENG CHEM RES Inorg. Chem. J. Agric. Food. Chem. J. Chem. Eng. Data J. Chem. Educ. J. Chem. Inf. Model. J. Chem. Theory Comput. J. Med. Chem. J. Nat. Prod. J PROTEOME RES J. Am. Chem. Soc. LANGMUIR MACROMOLECULES Mol. Pharmaceutics Nano Lett. Org. Lett. ORG PROCESS RES DEV ORGANOMETALLICS J. Org. Chem. J. Phys. Chem. J. Phys. Chem. A J. Phys. Chem. B J. Phys. Chem. C J. Phys. Chem. Lett. Analyst Anal. Methods Biomater. Sci. Catal. Sci. Technol. Chem. Commun. Chem. Soc. Rev. CHEM EDUC RES PRACT CRYSTENGCOMM Dalton Trans. Energy Environ. Sci. ENVIRON SCI-NANO ENVIRON SCI-PROC IMP ENVIRON SCI-WAT RES Faraday Discuss. Food Funct. Green Chem. Inorg. Chem. Front. Integr. Biol. J. Anal. At. Spectrom. J. Mater. Chem. A J. Mater. Chem. B J. Mater. Chem. C Lab Chip Mater. Chem. Front. Mater. Horiz. MEDCHEMCOMM Metallomics Mol. Biosyst. Mol. Syst. Des. Eng. Nanoscale Nanoscale Horiz. Nat. Prod. Rep. New J. Chem. Org. Biomol. Chem. Org. Chem. Front. PHOTOCH PHOTOBIO SCI PCCP Polym. Chem.

﹀