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Nihon Hoshasen Gijutsu Gakkai zasshi最新文献

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[9. High-sensitivity in vivo Imaging of 211At using XCam-CdTe]. (9。XCam-CdTe在2111at体内的高灵敏度成像。
Nihon Hoshasen Gijutsu Gakkai zasshi
Pub Date : 2026-01-01 DOI: 10.6009/jjrt.26-0108
Shin'ichiro Takeda
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引用次数: 0
[Dose Management and Estimation Model Development Using a Dose Area Product Meter during kV Planar Imaging in Image-guided Radiotherapy]. [使用剂量面积积计在图像引导放疗中kV平面成像中的剂量管理和估计模型的建立]。
Nihon Hoshasen Gijutsu Gakkai zasshi
Pub Date : 2026-01-01 DOI: 10.6009/jjrt.26-1614
Hideharu Miura, Toshiya Okazue, Kenji Kanemoto

Purpose: This study aimed to measure patient exposure dose during kilovoltage (kV) planar imaging in image-guided radiotherapy (IGRT) using a dose area product (DAP) meter and to estimate the DAP under unmeasured imaging conditions using two-dimensional cubic interpolation.

Methods: Dose measurements during kV planar imaging were performed using a DAP meter (VacuDAP duo; VacuTec Meßtechnik, Dresden, Germany) attached to the kV X-ray tube of the On-Board Imager mounted on a TrueBeam linear accelerator (Varian Medical Systems, Palo Alto, CA, USA). DAP was measured under various imaging conditions, with tube voltages ranging from 60 to 140 kV and tube currents from 2.5 to 20 mAs. A two-dimensional cubic interpolation based on the measured data was implemented to estimate the DAP for unmeasured imaging conditions.

Results: The deviation from linearity was relatively larger under low-dose conditions, with a maximum deviation of 1.8% at 100 kV and 2.5 mAs. Nevertheless, the overall DAP for each mAs value exhibited high linearity (R2=1.00). The relative error of the estimated DAP was within 2.0%.

Conclusion: The DAP meter was demonstrated to be effective for dose management in kV planar imaging in IGRT, and use of the two-dimensional cubic interpolation enabled accurate dose estimation even under unmeasured imaging conditions.

目的：本研究旨在使用剂量面积积（DAP）计测量图像引导放疗（IGRT）中千伏（kV）平面成像时患者的暴露剂量，并使用二维三次插值估计未测量成像条件下的DAP。方法：使用DAP仪表（VacuDAP duo; VacuTec Meßtechnik, Dresden, Germany）连接到安装在TrueBeam直线加速器（Varian Medical Systems, Palo Alto， CA， USA）上的机载成像仪的kV x射线管，进行kV平面成像期间的剂量测量。在各种成像条件下测量DAP，管电压为60至140 kV，管电流为2.5至20 ma。基于测量数据的二维三次插值方法估计了未测量成像条件下的DAP。结果：低剂量条件下与线性的偏差较大，在100 kV、2.5 ma时最大偏差为1.8%。然而，每个mAs值的总体DAP表现出高度线性（R2=1.00）。估计DAP的相对误差在2.0%以内。结论：在IGRT中，DAP仪对kV平面成像的剂量管理是有效的，即使在未测量的成像条件下，使用二维三次插值也能准确估计剂量。
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引用次数: 0
[10. Expectations on Dosimetry in Radiopharmaceutical Therapy]. (10。放射药物治疗中剂量学的展望[j]。
Nihon Hoshasen Gijutsu Gakkai zasshi
Pub Date : 2026-01-01 DOI: 10.6009/jjrt.26-0205
Naoyuki Ukon
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引用次数: 0
[Development and Accuracy Evaluation of the Beam Width Using a Tungsten Ring in a Wide-beam CT System]. [宽波束CT系统中钨环波束宽度的研制与精度评价]。
Nihon Hoshasen Gijutsu Gakkai zasshi
Pub Date : 2026-01-01 DOI: 10.6009/jjrt.26-0302
Takuma Hayashi, Atsushi Fukuda, Nao Ichikawa, Kosuke Matsubara
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引用次数: 0
[5. Quantitative Cerebral Hemodynamic Assessment Using SPECT and PET in Ischemic Cerebrovascular Disease]. (5。用SPECT和PET定量评价缺血性脑血管病脑血流动力学[j]。
Nihon Hoshasen Gijutsu Gakkai zasshi
Pub Date : 2026-01-01 DOI: 10.6009/jjrt.26-0109
Kaoru Sato
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引用次数: 0
[1. Utilization of Data and AI in Society (1): Ongoing Social Changes]. (1。数据与人工智能在社会中的应用(1)：持续的社会变革[j]。
Nihon Hoshasen Gijutsu Gakkai zasshi
Pub Date : 2026-01-01 DOI: 10.6009/jjrt.26-0107
Hiroshi Fujita
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引用次数: 0
[Towards the Future of Healthcare: The Resonance of Research and Development Activities]. [走向医疗保健的未来：研发活动的共鸣]。
Nihon Hoshasen Gijutsu Gakkai zasshi
Pub Date : 2026-01-01 DOI: 10.6009/jjrt.26-0204
Kiyohito Sonoki
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引用次数: 0
[1. The Role of Particle Therapy in Cancer Treatment]. (1。粒子疗法在癌症治疗中的作用]。
Nihon Hoshasen Gijutsu Gakkai zasshi
Pub Date : 2026-01-01 DOI: 10.6009/jjrt.26-0310
Nobukazu Fuwa
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引用次数: 0
[2. Important Points to Remember about Photography Techniques That You Should Review]. (2。你应该回顾的关于摄影技术的要点。
Nihon Hoshasen Gijutsu Gakkai zasshi
Pub Date : 2026-01-01 DOI: 10.6009/jjrt.26-0305
Tsuyoshi Mori
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引用次数: 0
[Radiological Science and Society in 2035: Structural Reforms for Sustainable Innovation]. [2035年的放射科学与社会：可持续创新的结构改革]。
Nihon Hoshasen Gijutsu Gakkai zasshi
Pub Date : 2026-01-01 DOI: 10.6009/jjrt.26-0311
Special Committee On Future Planning
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引用次数: 0
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