Mammographic system performance using an image reading qualification method [0.03%]
采用影像判读资格认证法的乳房摄影系统性能评估
Silvio R Pires,Regina B Medeiros
Silvio R Pires
Our goal was to evaluate mammography systems based on microcalcifications and fiber detection using a statistical phantom (ALVIM, model TRM 18-209, Nuclear Associates) image readings. ALVIM phantom images were acquired under diverse exposur...
Design and development of a new micro-beam treatment planning system: effectiveness of algorithms of optimization and dose calculations and potential of micro-beam treatment [0.03%]
一种新型微束治疗计划系统的研发：优化及剂量计算算法的有效性以及微束治疗的潜在用途研究
Hidenobu Tachibana,Hiroyuki Kojima,Noritaka Yusa et al.
Hidenobu Tachibana et al.
A new treatment planning system (TPS) was designed and developed for a new treatment system, which consisted of a micro-beam-enabled linac with robotics and a real-time tracking system. We also evaluated the effectiveness of the implemented...
A simple method for identifying image orientation of chest radiographs by use of the center of gravity of the image [0.03%]
利用图像重心识别胸片影像方向的一种简便方法
Hideo Nose,Yasushi Unno,Masayuki Koike et al.
Hideo Nose et al.
Bedside chest radiography is a frequent X-ray examination when patients are physically incapacitated. An X-ray cassette with an imaging plate is inserted below the patient's body, and the image orientation of the radiograph is determined by...
Rie Tanaka,Katsuhiro Ichikawa,Kosuke Matsubara et al.
Rie Tanaka et al.
Reduction of exposure dose and improvement in image quality can be expected to result from advances in the performance of imaging detectors. A number of researchers have reported on methods for simulating reduced dose images. The simplest m...
Monte Carlo calculations of the replacement correction factor, P(repl), for cylindrical chamber cavities in clinical photon and electron beams [0.03%]
临床光子和电子束中圆柱形腔室空腔的替代校正因子P(REPL)的蒙特卡罗计算
Fujio Araki
Fujio Araki
The purpose of this study was to calculate the replacement correction factor, P(repl) (the product P(gr)P(fl) in the AAPM's notation, or the product p(cav)p(dis) in the IAEA's notation), at a reference depth, d(ref), for cylindrical chamber...
Investigation of thermal and temporal responses of ionization chambers in radiation dosimetry [0.03%]
电离室辐射剂量学的热响应和时间响应研究
Hussein AlMasri,Akira Funyu,Yasumasa Kakinohana et al.
Hussein AlMasri et al.
The ionization chamber is a primary dosimeter that is used in radiation dosimetry. Generally, the ion chamber response requires temperature/pressure correction according to the ideal gas law. However, this correction does not consider the t...
Application of CT-PSF-based computer-simulated lung nodules for evaluating the accuracy of computer-aided volumetry [0.03%]
基于CT点扩散函数的计算机模拟肺结节在评估CAD系统体积测量准确性中的应用研究
Ayumu Funaki,Masaki Ohkubo,Shinichi Wada et al.
Ayumu Funaki et al.
With the wide dissemination of computed tomography (CT) screening for lung cancer, measuring the nodule volume accurately with computer-aided volumetry software is increasingly important. Many studies for determining the accuracy of volumet...
Comparison of neutron fluxes in an 18-MeV unshielded cyclotron room and a 16.5-MeV self-shielded cyclotron room [0.03%]
18MeV无屏蔽回旋加速器室与16.5MeV自屏蔽回旋加速器室中的中子通量比较
Toshioh Fujibuchi,Genki Horitsugi,Ichiro Yamaguchi et al.
Toshioh Fujibuchi et al.
Some medical compact cyclotrons have self-shielding to reduce neutron fluxes. Thermal neutron fluxes in an 18-MeV unshielded cyclotron room and in a 16.5-MeV self-shielded cyclotron room were evaluated. In addition, the radioactivities in c...
Comparative Study
Radiological physics and technology. 2012 Jul;5(2):156-65. DOI:10.1007/s12194-012-0149-2 2012
Evaluation of patient dose and operator dose in swallowing CT studies performed with a 320-detector-row multislice CT scanner [0.03%]
使用320排探测器CT扫描仪进行吞咽CT检查的患者剂量和医师受照剂量评估
Masanao Kobayashi,Kichiro Koshida,Shoichi Suzuki et al.
Masanao Kobayashi et al.
Recently, attempts to develop new types of swallowing function analysis with 320-detector-row multislice CT (320-MDCT) have been reported. The present report addresses (1) patient exposure, (2) operator exposure, and (3) spatial dose distri...
Radiologic assessment of a self-shield with boron-containing water for a compact medical cyclotron [0.03%]
含硼水屏蔽的小型医用回旋加速器的辐射屏蔽效果评价
Genki Horitsugi,Toshioh Fujibuchi,Ichiro Yamaguchi et al.
Genki Horitsugi et al.
The cyclotron at our hospital has a self-shield of boron-containing water. The amount of induced radioactivity in the boron-containing water shield of a compact medical cyclotron has not yet been reported. In this study, we measured the pho...