Comparisons of coded aperture imaging using various apertures and decoding methods. [gamma camera imaging of radionuclides in tissues]

Conference · Thu Jul 01 00:00:00 EDT 1976

OSTI ID:7245645

Chang, L T; Macdonald, B; Perez-Mendez, V

The utility of coded aperture ..gamma.. camera imaging of radioisotope distributions in Nuclear Medicine is in its ability to give depth information about a three dimensional source. We have calculated imaging with Fresnel zone plate and multiple pinhole apertures to produce coded shadows and reconstruction of these shadows using correlation, Fresnel diffraction, and Fourier transform deconvolution. Comparisons of the coded apertures and decoding methods are made by evaluating their point response functions both for in-focus and out-of-focus image planes. Background averages and standard deviations were calculated. In some cases, background subtraction was made using combinations of two complementary apertures. Results using deconvolution reconstruction for finite numbers of events are also given.

• Research Organization: California Univ., Berkeley (USA). Lawrence Berkeley Lab.
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 7245645
• Report Number(s): LBL-5342; CONF-760832-4; TRN: 77-001412
• Resource Relation: Conference: 20. annual SPIE technical symposium, San Diego, CA, USA, 24 Aug 1976
• Country of Publication: United States
• Language: English

Related Subjects

62 RADIOLOGY AND NUCLEAR MEDICINE
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
IMAGES
DATA ANALYSIS
SCINTISCANNING
DIAGNOSTIC TECHNIQUES
GAMMA CAMERAS
NUCLEAR MEDICINE
PATIENTS
RADIONUCLIDE ADMINISTRATION
RADIOPHARMACEUTICALS
TISSUE DISTRIBUTION
CAMERAS
COUNTING TECHNIQUES
DISTRIBUTION
DRUGS
LABELLED COMPOUNDS
MEDICINE
RADIOACTIVE MATERIALS
RADIOISOTOPE SCANNING
550601* - Medicine- Unsealed Radionuclides in Diagnostics
440101 - Radiation Instrumentation- General Detectors or Monitors & Radiometric Instruments