Measuring PET scanner sensitivity; Relating count rates to image signal-to-noise ratios using noise equivalent counts

Conference · Sun Apr 01 00:00:00 EST 1990 · IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (USA)

OSTI ID:6587988

Strother, S C ^[1]; Casey, M E ^[2]; Hoffman, E J ^[3]

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1. Neurology Dept., Memorial Sloan-Kettering Cancer Center, New York, NY (US)
2. CTI PET Systems Inc., Knoxville, TN (US)
3. California Univ., Los Angeles, CA (USA). Nuclear Medicine Lab.

Sensitivity parameters derived from a plot of a scanner's true coincidence count (TCC) rates as a function of activity in a 20 cm cylindrical phantom have no direct link to image quality. Noise equivalent count (NEC) rate curves, which incorporate the noise effects of subtracting the randoms and scatter count components provide a direct link between image signal-to-noise ratios and the scatter, randoms and trues coincidence count rates. The authors have measured TCC and NEC curves with a standardized 20 cm diameter nylon cylinder for five different PET scanners with several scanner-collimator combinations. In addition, the authors have compared TCC and NEC curves on one scanner with those from an Alderson brain phantom.

• OSTI ID: 6587988
• Report Number(s): CONF-900143-; CODEN: IETNA; TRN: 90-031777
• Journal Information: IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (USA), Vol. 37:2; Conference: Institute for Electronic and Electrical Engineers (IEEE) nuclear science symposium, San Francisco, CA (USA), 15-19 Jan 1990; ISSN 0018-9499
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
07 ISOTOPES AND RADIATION SOURCES
61 RADIATION PROTECTION AND DOSIMETRY
62 RADIOLOGY AND NUCLEAR MEDICINE
IMAGE PROCESSING
QUALITY CONTROL
IMAGE SCANNERS
PERFORMANCE
PHANTOMS
POSITRON COMPUTED TOMOGRAPHY
BRAIN
COINCIDENCE METHODS
SIGNAL-TO-NOISE RATIO
BODY
CENTRAL NERVOUS SYSTEM
COMPUTERIZED TOMOGRAPHY
CONTROL
COUNTING TECHNIQUES
DIAGNOSTIC TECHNIQUES
EMISSION COMPUTED TOMOGRAPHY
MOCKUP
NERVOUS SYSTEM
ORGANS
PROCESSING
STRUCTURAL MODELS
TOMOGRAPHY
440101* - Radiation Instrumentation- General Detectors or Monitors & Radiometric Instruments
655002 - Medical Physics- Radiation Source Calibration & Standardization
655003 - Medical Physics- Dosimetry
550601 - Medicine- Unsealed Radionuclides in Diagnostics