Characterization and performance of BGO crystals for positron emission tomography

✍ Scribed by G. Gervino; E. Monticone

• Book ID: 103959618
• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 358 KB
• Volume: 42
• Category: Article
• ISSN: 0924-4247
• DOI: 10.1016/0924-4247(94)80039-1

✦ Synopsis

The results of our mvestlgatlon on the performance of bismuth germanate uystals @+Ge3012 or BGO) employed m positron emlsslon tomography are presented BGO energy resolution to low energy gamma rays can be enhanced by workmg the lateral surfaces m a convenient mode The BGO behavlour has been measured down to -70 "C to estabhsh the relevance of temperature-related drift to peak broadenmg Varlatlons of both hght output and decay tgme have been mvestlgated and compared Ivlth previous results A sefles of tests IS presented where the unprovement m response of the BGO crystals, m terms of energy resolution, IS evaluated usmg thermahzed crystals In order to unprove the BGO performance m tune of flight tomography, where buddmg shorter comcldences (I e, reducmg the overlap time between two mdependent slgnak) means not only decxeasmg the peak/noise ratio, but also reducing the dose absorbed by the patient, we have mvestlgated the BGO energy resolution with the photomultlpher pulses chpped down to 100 ns