Effect of refraction index and light sharing on detector element identification for 2D detector modules in Positron Emission Tomography

✍ Scribed by Martin P. Tornai; Edward J. Hoffman; Simon R. Cherry

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 366 KB
• Volume: 348
• Category: Article
• ISSN: 0168-9002
• DOI: 10.1016/0168-9002(94)90810-9

✦ Synopsis

Relationships among indices of refraction (n) of scintillation detectors, light sharing among discrete detector elements and accuracy of detector element identification in Positron Emission Tomography (PET) 2-D detector arrays were examined with theory and experiment. Mismatches between the index of refraction of scintillators and the glass of photomultipliers (PMT) were seen to lead to nonlinear relationships between crystal position and ratio (positioning) signals derived from PMTs. Insight is provided into the empirically derived use of light sharing among elements of the crystals in PET 2-D array detectors to compensate for this nonlinear response.