Effective image filtration of pediatric single photon emission tomograms

Conference · Sun Jan 01 00:00:00 EST 1984 · J. Nucl. Med.; (United States)

OSTI ID:6930412

Gilday, D L; Green, M D; Puntillo, R; Ash, J M

Single Photon Emission Computed Tomography (SPECT) in children suffers from relatively poor photon statistics due to the lower radiopharmaceutical dose when compared with adults. Consequently, the authors have made a major effort to improve the resultant tomographic images. The authors compared the effect that different measurements had on the basic reconstruction. The baseline study was a reconstruction with an internal filter appropriate to the planar image's photon density. The first enhancement was to three dimensionally filter planar images prior to reconstructing with an internal ''high resolution'' filter. The second was to apply three dimensional filter to the images which were reconstructed with an internal ''high resolution'' filter. The filtration and reconstruction were performed on both MDS-A/sup 2/, A/sup 3/ and GE Star computers. The results showed that planar images which were of poor photon flux produced much better reconstructions when pre-filtered, whereas the difference was not nearly so dramatic with high photon flux studies. Therefore, the authors recommend routine pre-reconstruction three dimensional filtering on all SPECT studies, especially those of poor photon flux. In fact in some very low photon flux 24 hour CSF, Thallium and Gallium studies, it was only possible to interpret those images when pre-filtered first.

• Research Organization: The Hospital for Sick Children, Toronto, Ontario
• OSTI ID: 6930412
• Report Number(s): CONF-840619-
• Journal Information: J. Nucl. Med.; (United States), Vol. 25:5; Conference: 31. annual meeting of the Society of Nuclear Medicine, Los Angeles, CA, USA, 5 Jun 1984
• Country of Publication: United States
• Language: English

Related Subjects

62 RADIOLOGY AND NUCLEAR MEDICINE
SINGLE PHOTON EMISSION COMPUTED TOMOGRAPHY
DIGITAL FILTERS
IMAGE PROCESSING
ADULTS
CHILDREN
COMPUTER GRAPHICS
DATA ANALYSIS
GALLIUM
IMAGES
PEDIATRICS
PHOTONS
RADIATION DOSES
RADIOPHARMACEUTICALS
THALLIUM
AGE GROUPS
COMPUTERIZED TOMOGRAPHY
DIAGNOSTIC TECHNIQUES
DOSES
DRUGS
ELEMENTARY PARTICLES
ELEMENTS
EMISSION COMPUTED TOMOGRAPHY
LABELLED COMPOUNDS
MASSLESS PARTICLES
MEDICINE
METALS
PROCESSING
TOMOGRAPHY
550602* - Medicine- External Radiation in Diagnostics- (1980-)