Performance and quality control of scintillation cameras
Description
Acceptance testing, quality and control assurance of gamma-cameras are a part of diagnostic quality in clinical practice. Several parameters are required to achieve a good diagnostic reliability: intrinsic spatial resolution, spatial linearity, uniformities, energy resolution, count-rate characteristics, multiple window spatial analysis. Each parameter was measured and also estimated by a test easy to implement in routine practice. Material required was a 4028 multichannel analyzer linked to a microcomputeur, mini-computers and a set of phantoms (parallel slits, diffusing phantom, orthogonal hole transmission pattern). Gamma-cameras on study were:CGR 3400, CGR 3420, G.E.4000. Siemens ZLC 75 and large field Philips. Several tests proposed by N.E.M.A. and W.H.O. have to be improved concerning too punctual spatial determinations during distortion measurements with multiple window. Contrast control of image need to be monitored with high counting rate. This study shows the need to avoid punctual determinations and the interest to give sets of values of the same parameter on the whole field and to report mean values with their standard variation
Abstract (French)
L'acceptation l'assurance et le controle de qualite des gamma-cameras est une composante de cursus diagnostique. Ils comprennent les parametres suivants: la resolution spatiale intrinseque, la linearite spatiale, les uniformites, la resolution en energie, la performance en taux de comptage, un index de sensibilite, la distorsion spatiale en fonction de l'energie. Chaque parametre fut mesure parallelement a un test d'estimation realisable facilement en routine. Le materiel utilise fut un analyseur multicanal monoparametrique relie a un micro-ordinateur; des mini-ordinateurs relies aux gamma-cameras et un ensemble de mires et de fantomes (fentes paralleles, fantome diffusant, multi-trous lineaires). Les gamma-cameras etudiees furent: CGR 3400, CGR 3420, General Electric 4000, Siemens ZLC 75, et Philips grand champ. Certains tests proposes par la N.E.M.A. et l'O.M.S. demandent a etre ameliores en raison de mesures spatiales trop ponctuelles, comme pour la distorsion spatiale en fonction de l'energie. Le controle du contraste de l'image a haut taux de comptage parait egalement etre important a apprecier. Cette etude montre la necessite d'eviter des mesures ponctuelles et l'interet de fournir une serie de valeurs du meme parametre en tout point du champ et de rapporter une valeur moyenne et des ecarts typesAdditional details
Additional titles
- Original title (French)
- Mesures des performances des cameras a scintillation: controle de qualite
Publishing Information
- Journal Title
- J. Biophys. Med. Nucl.
- Journal Volume
- 7
- Journal Issue
- 1
- Series
- J. Biophys. Med. Nucl.
- Journal Page Range
- 43-57
- ISSN
- 0399-0435
INIS
- Country of Publication
- France
- Country of Input or Organization
- France
- INIS RN
- 14796698
- Subject category
- S46: INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY;
- Descriptors DEI
- COUNTING RATES; DATA PROCESSING; ENERGY RESOLUTION; GAMMA CAMERAS; PERFORMANCE; PERFORMANCE TESTING; PHANTOMS; QUALITY ASSURANCE; QUALITY CONTROL; SPATIAL RESOLUTION
- Descriptors DEC
- CAMERAS; CONTROL; MOCKUP; RESOLUTION; STRUCTURAL MODELS; TESTING