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Träfflista för sökning "WFRF:(Strand S) srt2:(1977-1979)"

Sökning: WFRF:(Strand S) > (1977-1979)

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2.
  • Bolmsjö, Magnus S., et al. (författare)
  • Imaging 123I with a scintillation camera. A study of detection performance and quality factor concepts
  • 1977
  • Ingår i: Physics in Medicine and Biology. - : IOP Publishing. - 0031-9155. ; 22:2, s. 266-277
  • Tidskriftsartikel (refereegranskat)abstract
    • Image quality, resolution and sensitivity of a scintillation camera equipped with various collimators have been investigated using high purity 123I. Pulse height distributions of 123I from a thyroid phantom partly in air and partly immersed in water demonstrated the substantial septa penetration of the 440 and 529 keV gamma rays of 123I with high resolution collimators. Line spread functions were recorded and the modulation transfer function was evaluated from them. The two concepts of 'figure of merit' also used were QB=Sa mod MTF mod 2, where Sa is the plane sensitivity and QC=S2/(S+2B), where S is the true signal from the object and B is the total background or noise due to septa penetration and scatter.
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3.
  • Strand, S. E., et al. (författare)
  • Quantitative lymphoscintigraphy. I. Basic concepts for optimal uptake of radiocolloids in the parasternal lymph nodes of rabbits
  • 1979
  • Ingår i: Journal of Nuclear Medicine. - 0161-5505. ; 20:10, s. 1038-1046
  • Tidskriftsartikel (refereegranskat)abstract
    • The activity-size distribution of radiocolloids has been studied using gel-chromatography scanning (GCS) of columns filled with Sepharose 4B gel. Rabbits were injected subcutaneously with the colloid of interest, laid supine beneath a gamma camera, and imaged every 15 sec for 2 to 4 hr. From the stored data, the uptakes in the parasternal lymph nodes were analyzed in terms of a two-compartment model, and the rate constants measured. The substances tested were Au-198 colloid, Tc-99m antimony sulfide colloid, Tc-99m tin colloid, Tc-99m phytate, and Tc99m sulfur colloid. It was shown that the optimal particle size for the colloid is in the range 1-10 nm. The largest and most rapid uptake was found for Au-198 colloid, with a particle size of 5 nm, which appeared as a single peak in the GCS spectrum. The percentage uptake after 2 hr for Au-198 colloid was 8%, while it was 5% for antimony sulfide colloid, which was the best of the Tc-99m-labeled colloids. The GCS spectrum for the antimony product showed a single-peaked size distribution with a somewhat broader range: 5-15 nm. The particles of the other colloids were either too large to pass into the lymphatic system, or too small to be trapped.
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  • Resultat 1-3 av 3
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tidskriftsartikel (3)
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refereegranskat (3)
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Strand, S. E. (2)
Persson, B. R.R. (2)
Strand, Sven-Erik (1)
Persson, Bertil R.R. (1)
Aspegren, K (1)
Bolmsjö, Magnus S. (1)
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Lunds universitet (3)
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Engelska (3)
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Medicin och hälsovetenskap (2)

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