1.
Alm Carlsson, Gudrun
(författare)
Burlins kavitetsteori
1979
Rapport (övrigt vetenskapligt/konstnärligt) abstract
Burlins kavitetsteori är en generell teori i den meningen att inga krav finns på detektorns dimensioner jämfört med sekundärelektronernas räckvidder. Detektorn måste dock vara "tunn" för fotonerna dvs inte ge någon nämnvärd attenuering av de mot detektorn infallande fotonerna
2.
3.
HAFSTRÖM, LARSOLOF, et al.
(författare)
Measurements of cardiac output and organ blood flow in rats using 99Tcm labelled microspheres
1979
Ingår i: Acta Physiologica Scandinavica. - : Wiley. - 0001-6772 .- 1365-201X. ; 106:2, s. 123-128
Tidskriftsartikel (refereegranskat) abstract
The cardiac output and regional blood flow have been simultaneously determined in the anesthetized rat by using the reference organ method. 99Tcm labelled dextran 15 μm microspheres were injected in the left ventricle while simultaneously an arterial reference sample was drawn at constant known rate. The values calculated regarding cardiac output agree well with previously recorded series. Regional organ blood flow in the rat is presented as ml. min‐1. g‐1 tissue and values do agree with those reported by others. The results indicate that the reference organ method can be used in the rat for the study of cardiac output and regional blood flow.
4.
5.
Nordmark, Lars, 1935-
(författare)
Angiografi av arteria testicularis
1979
Doktorsavhandling (övrigt vetenskapligt/konstnärligt) abstract
In addition all patients examined by means of using testicular angiography before the first of November 1978» have been included. 123 patients were intended for angiography, 13 of them bilaterally.The intention with the investigation was to determine whether selective angiography of the testicular artery might be a useful examination in cases of a non-palpable testis and in patients with different intrascrotal lesions.There is a description of a useful method of investigation. The normal angiographic anatomy of the testicular artery is also described, both retroperitoneally and in the scrotum. In cases with a non-palpable testis it is shown that it is easy to distinguish between agenesis and cryptorchism.The normal magnification angiography of the testis is shown and how various intrascrotal lesions alter the picture.Finally some cases with retroperitoneal lesions are presented in which the testicular artery is committed.
6.
7.
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.
8.
