DocumentCode :
830310
Title :
A Comparative Evaluation of Scatter Correction Techniques in High-Resolution Detectors Based on PSPMTs and Scintillator Arrays
Author :
Karali, Evangelia ; Loudos, George K. ; Sakellios, Nicolas ; Nikita, Konstantina S.
Author_Institution :
Dept. of Electr. Eng., Nat. Tech. Univ. of Athens
Volume :
55
Issue :
6
fYear :
2006
Firstpage :
1913
Lastpage :
1917
Abstract :
Single photon emission computed tomography images suffer from low contrast as a result of photon scatter. The standard method for excluding the scatter component in pixelized scintillators is the application of an energy window around the central photopeak channel of each crystal cell, but small angle scattered photons still appear in the photopeak window, and they are included in the reconstructed images. A number of scatter correction techniques have been proposed in order to estimate the scatter component, but they have not yet been applied in pixelized scintillators, where most groups use the standard one-photopeak window for scatter correction. In this paper, the author have assessed three subtraction techniques that use a different approach in order to calculate the scatter component and subtract it from the photopeak image: the dual energy window subtraction technique, the convolution subtraction technique, and a deconvolution technique. All these techniques are compared to the standard method
Keywords :
convolution; image reconstruction; photomultipliers; position sensitive particle detectors; single photon emission computed tomography; solid scintillation detectors; PSPMT; convolution subtraction technique; deconvolution technique; dual energy window subtraction technique; high-resolution detectors; photon scatter; photopeak image; pixelized scintillators; scatter component; scatter correction techniques; scintillator arrays; scintimammography; single photon emission computed tomography; small animal imaging; Convolution; Detectors; Electromagnetic scattering; Image reconstruction; Particle scattering; Photonic crystals; Pixel; Sensor arrays; Single photon emission computed tomography; Subtraction techniques; Pixelized scintillators; scatter correction; scintimammography; single photon emission computed tomography (SPECT); small animal imaging;
fLanguage :
English
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9456
Type :
jour
DOI :
10.1109/TIM.2006.884293
Filename :
4014714
Link To Document :
بازگشت