منابع مشابه
PET-based geometrical calibration of a pinhole SPECT add-on for an animal PET scanner.
We developed SPECT imaging capability on an animal PET scanner to provide a cost effective option for animal SPECT imaging. The SPECT add-on sub-system was enabled by mechanically integrating a multiple-pinhole collimator in the PET detector ring. This study introduces a method to calibrate the geometrical parameters of the SPECT add-on using the PET imaging capability of the scanner. The propo...
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Figure 1 shows an example of a light field camera with a pinhole mask in front of the sensor. If we look at the sensor in 1D and assume an total x-resolution of 900 pixels and a Θ resolution of 9, the local x resolution is 100. The disadvantages are therefore a loss in resolution and a loss of light, as most of the light gets blocked by the mask. Therefore, while this model is very clean on a t...
متن کاملTeaching a Pet Robot through Virtual Games
In this paper, we present a human-robot teaching framework that uses ”virtual” games as a means for adapting a robot to its user through natural interaction in a controlled environment. We present an experimental study in which participants instruct an AIBO pet robot while playing different games together on a computer generated playfield. By playing the games in cooperation with its user, the ...
متن کاملMultimodal virtual bronchoscopy using PET/CT images.
OBJECTIVE To demonstrate the possibilities, advantages and limitations of virtual bronchoscopy using data sets from positron emission tomography (PET) and computed tomography (CT). MATERIALS AND METHODS Eight consecutive patients with non-small cell lung cancer (NSCLC) underwent PET/CT. PET was performed with a glucose analog, 2-[fluorine-18]-fluoro-2-deoxy-D-glucose (18F-FDG), using a state-...
متن کاملTransmission confocal laser scanning microscopy with a virtual pinhole based on nonlinear detection.
We present a transmission-mode confocal laser scanning microscope system based on the use of second-harmonic generation (SHG) for signal detection. Our method exploits the quadratic intensity dependence of SHG to preferentially reveal unscattered signal light and reject out-of-focus scattered background. The SHG crystal acts as a virtual pinhole that remains self-aligned without the need for de...
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ژورنال
عنوان ژورنال: Journal of Nuclear Medicine
سال: 2008
ISSN: 0161-5505,2159-662X
DOI: 10.2967/jnumed.107.043034