نتایج جستجو برای: tof
تعداد نتایج: 12111 فیلتر نتایج به سال:
Tetralogy of Fallot (TOF) is the commonest congenital cyanotic heart disorder, accounting for 5–6 % of them [1]. It is characterized by a large ventricular septal defect, right ventricular outflow tract obstruction, right ventricular hypertrophy, and aorta overriding the interventricular septum. Most patients with TOF undergo reparative surgery in childhood. TOF with pulmonary atresia is the ex...
This paper suggests an approach in fusing two 3D estimation techniques: stereo vision and Time-Of-Flight (TOF) imaging. By mapping the TOF-depth measurements to stereo disparities, the correspondence between the images from a fast TOF-camera and standard high resolution camera pair are found, so the TOF depth measurements can be linked to the image pairs. In the same framework, a method is deve...
Ni-borate materials are oxygen evolution catalysts that operate at near-neutral pH and have been found previously to improve due to structural changes induced via anodic conditioning. We find that this increased activity after conditioning at 0.856 V vs. SCE, as measured on a turn-over frequency basis (TOF) at 400 mV overpotential (TOF = 0.38 s(-1)), accompanies significant Fe incorporation (14...
In tetralogy of Fallot (TOF), the most common form of cyanotic congenital heart disease, only a few patients reach adulthood without surgical correction. We present the case of a man with TOF who survived until the age of 75 years without surgical intervention and had a very unusual combination of TOF and quadricuspid aortic valve (QAV). QAV, complicated by aortic regurgitation, is an uncommon ...
UNLABELLED Time-of-flight (TOF) PET uses very fast detectors to improve localization of events along coincidence lines-of-response. This information is then utilized to improve the tomographic reconstruction. This work evaluates the effect of TOF upon an observer's performance for detecting and localizing focal warm lesions in noisy PET images. METHODS An advanced anthropomorphic lesion-detec...
Kurzfassung. Time-of-Flight (ToF) Kameras bieten aufgrund der Möglichkeit zur schnellen und robusten Oberflächenerfassung großes Potential für die intra-interventionelle Akquise von Informationen über die Patientenanatomie und Organmorphologie. Eine Nutzung der neuen Technik als medizinische Bildgebungsmodalität erfordert eine nahtlose Integration in die verwendete Softwareinfrastruktur. Nachde...
The management of intra-fractional respiratory motion is becoming increasingly important in radiation therapy. Based on in advance acquired accurate 3D CT data and intra-fractionally recorded noisy timeof-flight (ToF) range data an improved treatment can be achieved. In this paper, a variational approach for the joint registration of the thorax surface extracted from a CT and a ToF image and th...
We have developed a detailed Monte Carlo simulation program for the Belle TOF system. Based on GEANT simulation, it takes account of all physics processes in the TOF scintillation counters and readout electronics. The simulation reproduces very well the performance of the Belle TOF system, including the dE/dx response, the time walk effect, the time resolution, and the hit efficiency due to bea...
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