منابع مشابه
A pinhole gamma camera with optical depth-of-interaction elimination.
The performance of pinhole single photon emission computed tomography (SPECT) depends on the spatial resolution of the gamma-ray detectors used. Pinhole cameras suffer from strong resolution loss due to the varying depth-of-interaction (DOI) of gamma quanta that enter the detector material at an angle. We eliminate DOI effects in a scintillation gamma camera via a dedicated optic fiber bundle t...
متن کاملImaging beyond the Pinhole Camera
The world’s first photograph was taken by Joseph Nicphore Niépce (1775–1833) in 1826 on his country estate near Chalon-sur-Sane, France. The photo shows parts of farm buildings and some sky. Exposure time was eight hours. Niépce used a pinhole camera, known as camera obscura, and utilized pewter plates as the support medium for the photographic process. The camera obscura, the basic projection ...
متن کاملUse of a compact pixellated gamma camera for small animal pinhole SPECT imaging.
OBJECTIVES Pinhole SPECT which permits in vivo high resolution 3D imaging of physiological functions in small animals facilitates objective assessment of pharmaceutical development and regenerative therapy in pre-clinical trials. For handiness and mobility, the miniature size of the SPECT system is useful. We developed a small animal SPECT system based on a compact high-resolution gamma camera ...
متن کاملDevelopment of a variable-radius pinhole SPECT system with a portable gamma camera.
OBJECTIVE To develop a small-animal SPECT system using a low cost commercial portable gamma camera equipped with a pinhole collimator, a continuous scintillation crystal and a position-sensitive photomultiplier tube. MATERIAL AND METHODS The gamma camera was attached to a variable radius system, which enabled us to optimize sensitivity and resolution by adjusting the radius of rotation to the...
متن کاملA clinical gamma camera-based pinhole collimated system for high resolution small animal SPECT imaging.
The main objective of the present study was to upgrade a clinical gamma camera to obtain high resolution tomographic images of small animal organs. The system is based on a clinical gamma camera to which we have adapted a special-purpose pinhole collimator and a device for positioning and rotating the target based on a computer-controlled step motor. We developed a software tool to reconstruct ...
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ژورنال
عنوان ژورنال: Chinese Science Bulletin
سال: 2011
ISSN: 1001-6538,1861-9541
DOI: 10.1007/s11434-011-4606-9