Validity of a simple spillover correction for positron emission tomography measurements in the cerebrospinal fluid region [0.03%]
脑脊液区域正电子发射断层扫描测量的简单溢出校正的有效性
Emi Hayashi,Shin Hibino,Mitsuhito Mase
Emi Hayashi
Positron emission tomography (PET) measurements in the cerebrospinal fluid (CSF) region may be overestimated because of spillover artifacts from surrounding radioactivity. In this study, we proposed a simple spillover correction method (sub...
Efficient knowledge-based planning model construction in institutions with limited cases using plan quality metrics [0.03%]
基于计划质量度量的有限案例机构中有效的知识规划模型构建方法研究
Yusuke Suzuki,Motoharu Sasaki,Yuji Nakaguchi et al.
Yusuke Suzuki et al.
Prostate cancer volumetric modulated arc therapy (VMAT) planning often faces challenges in the construction of high-quality RapidPlan models when the number of cases is limited. In the present study, we retrospectively scored 90 VMAT plans ...
The effect of pediatric chest CT examinations on lens exposure: a Monte Carlo simulation study [0.03%]
儿科胸部CT检查对晶状体照射的影响：蒙特卡罗模拟研究
Takanori Masuda,Yasushi Katsunuma,Masao Kiguchi et al.
Takanori Masuda et al.
The aim of the study was to evaluate the degree of error between Monte Carlo simulations of pediatric lens dose outside the scan range and measured values obtained with a dosimeter. Two types of computed tomography (CT) equipment and three ...
Performance evaluation of a high-ratio anti-scatter grid with aluminum interspace for digital radiography image quality [0.03%]
用于数字X射线成像的高比值防散射网格性能评价
Tomoya Nohechi,Katsuhiro Ichikawa,Hiroki Kawashima et al.
Tomoya Nohechi et al.
We evaluated the effectiveness of aluminum interspace grids with varying grid ratios, conventional 10:1 (r10) and 14:1 (r14) and experimental 17:1 (r17), in terms of image quality of digital radiography for phantom thicknesses of 20 to 30 c...
Investigation of optimal settings for deviceless respiratory synchronization in PET/CT examinations: effects of different reconstructions on image quality [0.03%]
无设备呼吸同步的PET/CT检查中最佳设置的调查研究：不同重建对图像质量的影响
Naoto Mori,Kunihiro Iwata,Takahiro Uno et al.
Naoto Mori et al.
Positron emission tomography (PET) images can be compromised by respiratory motion, leading to a decreased standardized uptake value (SUV) of the lesion and overestimation of the metabolic tumor volume (MTV). This study aimed to determine t...
Estimation of organ and effective doses for rotational cerebral angiography using the National Cancer Institute Dosimetry System for Radiography and Fluoroscopy (NCIRF) [0.03%]
基于放射和荧光透视的国家癌症研究所剂量测量系统（NCIRF）估算旋转式脑血管造影的器官及有效剂量
Hitoshi Miyazaki,Toshioh Fujibuchi,Donghee Han et al.
Hitoshi Miyazaki et al.
Rotational cerebral angiography requires accurate dosimetry. The National Cancer Institute Dosimetry System for Radiography and Fluoroscopy (NCIRF), a Monte Carlo-based dosimetry software, can evaluate the organ dose (OD) and effective dose...
Dose reduction in radiotherapy treatment planning CT via deep learning-based reconstruction: a single‑institution study [0.03%]
基于深度学习重建的放射治疗计划CT中剂量减少的单中心研究
Keisuke Yasui,Yuri Kasugai,Maho Morishita et al.
Keisuke Yasui et al.
To quantify radiation dose reduction in radiotherapy treatment-planning CT (RTCT) using a deep learning-based reconstruction (DLR; AiCE) algorithm compared with adaptive iterative dose reduction (IR; AIDR). To evaluate its potential to info...
Development of a patient-specific cone-beam computed tomography dose optimization model using machine learning in image-guided radiation therapy [0.03%]
基于图像引导放射治疗的机器学习患者特定CBCT剂量优化模型的发展研究
Shuta Miura
Shuta Miura
Cone-beam computed tomography (CBCT) is commonly utilized in radiation therapy to visualize soft tissues and bone structures. This study aims to develop a machine learning model that predicts optimal, patient-specific CBCT doses that minimi...
Measurement of shrinking immobilizing sheets for radiotherapy using a near-infrared camera [0.03%]
利用近红外相机测量放射治疗中收缩固定的膜式定位装置
Akito S Koganezawa,Takuya Wada,Daiki Hashimoto et al.
Akito S Koganezawa et al.
We aimed to develop a technique to precisely measure the shrinkage of immobilization sheets (ISs) using a three-dimensional (3D) tracking of multiple points on IS using a near-infrared camera. A thermoplastic sheet and an elastomer sheet we...
Evaluation of absorbed dose to brain in patients undergoing head and neck helical CT based on AAPM report 293 [0.03%]
基于AAPM报告293的头颈部螺旋CT受检者脑组织吸收剂量评估研究
M S Shehu,N N Garba,R Nasiru et al.
M S Shehu et al.
This study used AAPM Report 293 to estimate absorbed doses (EADs) from head and neck CT examinations in 100 patients (ages 18-90), leveraging its superior accuracy over Report 220. The study used data from a diagnostic CT scanner of model C...