Water equivalence evaluation of PRESAGE(®) formulations for megavoltage electron beams: a Monte Carlo study [0.03%]
基于蒙特卡罗方法的PRESAGE(®)材料对兆伏电子束水当量性能评价研究
Tina Gorjiara,Zdenka Kuncic,Robin Hill et al.
Tina Gorjiara et al.
To investigate the radiological water equivalency of three different formulations of the radiochromic, polyurethane based dosimeter PRESAGE(®) for three dimensional (3D) dosimetry of electron beams. The EGSnrc/BEAMnrc Monte Carlo package w...
Four dimensional radiotherapy: a review of current technologies and modalities [0.03%]
四种维度的放射治疗：当前技术及模式综述
J Moorrees,E Bezak
J Moorrees
Organ motion is a substantial concern in the treatment of thoracic tumours using radiotherapy. A number of technologies have evolved in order to address this concern in both the fields of CT imaging and radiation delivery. This review paper...
A new evaluation method for image noise reduction and usefulness of the spatially adaptive wavelet thresholding method for CT images [0.03%]
一种新的图像降噪评价方法及小波域空间自适应阈值法在CT图像去噪中有效性的研究
Mitsuru Ikeda,Reiko Makino,Kuniharu Imai
Mitsuru Ikeda
We have proposed a direct evaluation method concerning preservation of noise-free components for image noise reduction. This evaluation method is to graphically estimate how well a noise-reduction method will preserve noise-free image compo...
Investigating the changes in heart rate asymmetry (HRA) with perturbation of parasympathetic nervous system [0.03%]
自主神经功能扰动下的心率不对称性(HRA)变化规律研究
Chandan Karmakar,Ahsan Khandoker,Marimuthu Palaniswami
Chandan Karmakar
The heart rate asymmetry (HRA) is a disproportionate distribution of heart rate signal. The current study was designed to assess the changes in HRA in experimental conditions using Poincaré plot during parasympathetic blockade (atropine in...
Development of a surgical instrument for measuring forces applied to the ossicles of the middle ear [0.03%]
一种用于测量中耳听小骨所受力值的手术器械的研发
Michael Sheedy,Mike Bergin,Grant Wylie et al.
Michael Sheedy et al.
Surgery of the middle ear is a delicate process that requires the surgeon to manipulate the ossicles, the smallest bones in the body. Excessive force applied to the ossicles can easily be transmitted through to the inner ear which may cause...
Performance evaluation of diverse T-wave alternans estimators under variety of noise characterizations and alternans distributions [0.03%]
多种噪声特征和T波交替分布下多样T波交替估计器的性能评估
Asim Dilawer Bakhshi,Sajid Bashir,Imran Shafi et al.
Asim Dilawer Bakhshi et al.
Prognostic significance of microvolt T-wave alternans (TWA) has been established since their inclusion among important risk stratifiers for sudden cardiac death. Signal processing schemes employed for TWA estimation have their peculiar theo...
Variations in daily quality assurance dosimetry from device levelling, feet position and backscatter material [0.03%]
体位和背散射材料对日质保剂量学的影响
Abdurrahman Ceylan,Martin Butson,Ashley Cullen et al.
Abdurrahman Ceylan et al.
Daily quality assurance procedures are an essential part of radiotherapy medical physics. Devices such as the Sun Nuclear, DQA3 are effective tools for analysis of daily dosimetry including flatness, symmetry, energy, field size and central...
D Wang,M Sobolewski,R Hill
D Wang
The objective of this work was to evaluate the dosimetry of tungsten eye shields for use with kilovoltage X-ray beam treatments. The eye shields, originally designed for megavoltage electron beams, were made of 2 mm tungsten thickness and i...
C M Poole,I Cornelius,J V Trapp et al.
C M Poole et al.
Cloud computing allows for vast computational resources to be leveraged quickly and easily in bursts as and when required. Here we describe a technique that allows for Monte Carlo radiotherapy dose calculations to be performed using GEANT4 ...