نتایج جستجو برای: field scanner
تعداد نتایج: 803839 فیلتر نتایج به سال:
In order to better understand and exploit the rich information content of new remotely sensed datasets, there is a need for comparative land cover classification studies. In this study, the automatic classification of a suburban area was investigated by using (1) digital aerial image data; (2) digital aerial image data and laser scanner data; (3) a high-resolution optical QuickBird satellite im...
Scanner noise during functional magnetic resonance imaging (fMRI) may interfere with brain function and change blood oxygenation level dependent (BOLD) signals, a problem that generally worsens at the higher field strengths. Therefore, we studied the effect of increased acoustic noise on fMRI during verbal working memory (WM) processing. The sound pressure level of scanner noise was increased b...
A successful image-to-physical space overlay method is necessary to provide reliable guidance information to surgeons and accurate surface displacement data for use in compensation algorithm of soft tissue deformation. In this paper we outline a novel approach to relate preoperative images to intraoperative space in a lung volume reduction surgery. The protocol requires intraoperative geometric...
UNLABELLED The recently released Biograph mMR is the first commercially available integrated whole-body PET/MR scanner. There are considerable advantages to integrating both modalities in a single scanner that enables truly simultaneous acquisition. However, there are also concerns about the possible degradation of both PET and MR performance in an integrated system. This paper evaluates the pe...
Proton resonance frequency (PRF), by which it precesses in the magnetic field, alters due to change in temperature, which can be detected with magnetic resonance imaging (MRI). MRI scanner uses protons’ nuclear magnetic resonance phenomenon. The target is first excited with a radio frequency pulse, then it’s relaxation to initial stage is observed. Parts with different temperatures can be mappe...
This letter describes a data acquisition setup for recording, and processing, running speech from a person in a magnetic resonance imaging MRI scanner. The main focus is on ensuring synchronicity between image and audio acquisition, and in obtaining good signal to noise ratio to facilitate further speech analysis and modeling. A field-programmable gate array based hardware design for synchroniz...
Currently, the US Bureau of Labor Statistics(BLS) sends field representatives to manually collect price quotes when constructing the Consumer Price Index(CPI). Many of the nation’s retailing outlets now have scanner check-outs that record their prices and expenditures. There is an opportunity for BLS to use these scanner records in the construction of its CPI. Some of the potential benefits fro...
Active safety vehicle devices are getting more attention recently. To prevent traffic accidents, the environment in front and even around the vehicle must be checked and monitored. In the present applications, mainly camera and radar based systems are used as sensing devices. Laser scanner, one of the sensing devices, has the advantage of obtaining accurate measurement of the distance and the g...
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