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| 2. |
- Bolmsjo, M. S., et al.
(författare)
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A new instrument for survey monitoring of airborne xenon-133
- 1982
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Ingår i: Physics in Medicine and Biology. - : IOP Publishing. - 0031-9155 .- 1361-6560. ; 27:6, s. 861-866
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Tidskriftsartikel (refereegranskat)abstract
- Methods are reviewed for measuring xenon-133 contamination of the air in medical clinics. The principles of a new, simple, and low cost monitor are outlined. Results from experimental tests in laboratories and medical clinics were encouraging, indicating that the monitor is a valuable tool for survey measurements of 133Xe contamination in nuclear medicine departments.
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| 3. |
- Bolmsjö, M. S., et al.
(författare)
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Factors affecting the trapping performance of xenon holdup-filters in nuclear medicine applications
- 1982
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Ingår i: Medical Physics. - : Wiley. - 0094-2405. ; 9:1, s. 96-105
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Tidskriftsartikel (refereegranskat)abstract
- Activated charcoal traps are used in nuclear medicine departments to capture exhaled radioactive xenon gas. In the present study, the trapping performance of charcoal was investigated for different physical qualities in experimental and clinical situations. Various factors affecting the trapping capacity are identified, such as the charcoal mass, moisture and carbon�dioxide concentrations in the sweep gas, gas�flow rate through the trap, and temperature. Improper drying of the exhaled air prior to passage through the charcoal bed appears to be a critical factor, leading to a much earlier breakthrough of xenon. Commercial xenon traps intended for ambient temperature operation were found to be useful only for a limited number of patients due to an early breakthrough point. By refrigerating the trap, however, a much larger capacity was achieved. If correctly managed, xenon traps constitute a useful alternative for isolating radioactive xenon wastes in clinical and experimental applications.
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| 4. |
- Kempi, V., et al.
(författare)
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Evaluation of renal function parameters with simultaneously administered 99mTc-DTPA and 131I-hippuran
- 1983
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Ingår i: European Journal Of Nuclear Medicine. - 0340-6997. ; 8:2, s. 65-71
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Tidskriftsartikel (refereegranskat)abstract
- The present study aimed at comparing two renal function tests using 99mTc-DTPA (diethylene triamine penta acetic acid) and 131I-labeled hippuran (o-hippuric acid). A mixture of 80 Mbq 99mTc-DTPA and 7.4 MBq 131I-hippuran in a total volume of 1.5 ml or less was injected into an arm-vein. Both radiopharmaceuticals have identical intitial distributions in the blood pool when injected in this manner. Seventy-two patients were studied with the present dual radionuclide technique. The following parameters were derived from the renogram: area under curve, uptake ratio, Tmax, decrease ratio, excretion ratio, and rate of decrease. The parameters for 99mTc-DTPA and 131I-hippuran were compared for various kidney groups. Generally the renographic parameters were well correlated. Apart from the systematic differences due to different modes of renal excretion, the curve patterns virtually agreed. The differences that were observed between the two tracers lacked clinical significance.
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