Modeling of the tomographic weights usually incorporates angle of view, decay and attenuation. A usual assumption is that the gamma camera is a long way from the object, this leads to the approximation that the angle of view subtending the front of the collimator tube is the same as that subtending the back (Weir & Green, 1994). However, if the distance between camera and subject is small then ...

Some scintillation camera manufactures adhere to standard code of performance specification established by National Electric Manufactures Association (NEMA). Items such as differential and integral uniformity, spatial resolution energy resolution, etc. are all calculated with reproducible methodology that allows the user reliable technique for creation of these standards to avoid any lack of cl...

This study presents the comparison of the cumulative distribution of tropospheric scintillation models in order to see which model suits the best with the measured one. About six different models were compared and studied with the measured one. The scintillation data were taken from January 2011 till December 2011 which totals up to a 12 month period. This paper also presents the percentage fra...

Gallium-67 images have generally suffered from poor quality because of difficulty in properly collimating the multiple photopeaks released by the radionuclide. A comparison of the spatial resolution and septal penetration characteristics of two collimators we currently use for Ga-67 imaging-with a scintillation camera system equipped with single photopeak analyzersis presented. Results show tha...

Two types of distortions are produced by the gamma camera. One is nonuniform sensitivity re sponse over the detecting area. The second is spatial distortion; that is, the displacement from their true positions of the xand y-coordinates of a scintilla tion. This component of camera image distortion arises in the resolution and transfer of the xand y-coordinates of a scintillation and results in ...

Gamma camera imaging is an important technique in nuclear medicine. It capable of diagnostic metabolically active areas and organ function, it can be used to evaluate blood flow the heart muscle, measure bone growth, detect tumors, perform many other medical studies. a real world application that integrates concepts medicine, physics, geometric optics, data processing, calibration, image format...

Recently, the necessity of camera in vehicle industry is increasing now as increasing the smart car needs. Almost smart car concepts are implemented by using the camera system based on image processing technology. Actually, the rear view camera for parking assistance system, the forward view camera for lane departure warning and forward collision warning system, and multi-view camera for vehicl...