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...
Improved denoising scheme using three-dimensional multi-zone convolutional neural filters in dedicated breast positron emission tomography images [0.03%]
一种基于三维多区域卷积神经网络滤波的专用乳腺正电子发射断层扫描图像降噪方法
Masahiro Tsukijima,Atsushi Teramoto,Akihiro Kojima et al.
Masahiro Tsukijima et al.
Dedicated breast positron emission tomography (dbPET) has higher spatial resolution than whole-body PET and can detect smaller lesions. Therefore, it is expected to be useful in detecting early stage breast cancer and assessing treatment ef...
Evaluation of the usefulness of the masking on un-smoothed image method in 201Tl myocardial perfusion SPECT [0.03%]
评估201Tl心肌灌注SPECT未平滑图像匹配法的价值
Ryuichi Miyajima,Ryo Ueno,Ryosuke Ichino et al.
Ryuichi Miyajima et al.
In 201Tl myocardial perfusion single-photon emission computed tomography (SPECT), gastric wall uptake can impact the inferior wall. This study aimed to evaluate the effectiveness and usefulness of the masking on un-smoothed image (MUS) meth...
Comparative dosimetric analysis of base dose and gradient-based optimization in overlapping regions of extended target volumes using an anthropomorphic phantom [0.03%]
利用类人体模体在扩展目标体积重叠区域分析基础剂量与梯度优化的剂量学差异
Dipesh,Raj Pal Singh,Manindra Bhushan
Dipesh
This study compares the dosimetric performance of Base Dose Optimization (BDO) and Gradient-Based Optimization (GBO) for extended target volumes in Total Body Irradiation (TBI). The focus is on overlapping regions using the Rando Phantom. T...
Margin for compensating displacement of adrenal gland metastasis and fiducial marker along with respiratory phase in real-time motion-tracking radiation therapy [0.03%]
实时运动跟踪放射治疗中肾上腺转移瘤和体内标记物在呼吸周期内的位移补偿范围研究
Yuki Aoyama,Tetsuya Tomida,Susumu Nagata et al.
Yuki Aoyama et al.
In therapy with Synchrony® mounted on Radixact®, the fiducial marker (FM) and adrenal gland metastasis, which shift with respiratory phase, require margin compensation for high-dose prescriptions. Although compensation is critical, no stu...
Classification of liver lesions based on temporal changes in hepatobiliary phase contrast on magnetic resonance imaging: a preliminary study [0.03%]
基于磁共振胆肝期对比度的时间变化对肝脏病变进行分类的初步研究
Yasuo Takatsu,Masafumi Nakamura,Tomoko Tateyama et al.
Yasuo Takatsu et al.
This study evaluated whether temporal changes from the dynamic late phase to the hepatobiliary phase using gadolinium-ethoxybenzyl-diethylenetriamine penta-acetic acid supported liver tumor classification. A total of 147 patients with 165 l...
Influence of the number of images on threshold image contrast measurements with a phantom with gold disks in digital mammography [0.03%]
数字乳腺摄影中含金盘体模的阈值图像对比度测量受图片数量的影响
Michał Biegała,Agata Batolik
Michał Biegała
Image quality, in addition to radiation dose, is the most important physical parameter in digital mammography. Image quality should be periodically monitored using the CDMAM phantom. The aim of this study is to investigate the effect of the...
Simultaneous retrospective estimation of radiation dose and elapsed time by electron paramagnetic resonance spectroscopy of di-sodium tartrate [0.03%]
二钠酒石酸盐电子顺磁共振谱同时估计辐射剂量和时间流逝
Ahmed M Maghraby
Ahmed M Maghraby
A novel technique for the simultaneous evaluation of the radiation dose and the time elapsed after irradiation is described in detail. The proposed method depends on the use of the two signals of the EPR spectrum of irradiated di-sodium tar...