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B Rosengren

Publications and source records attributed to B Rosengren.

113 records · Page 7Linked to original sources
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Temporary ischaemia of a large bowel segment induced by degradable starch microspheres in man.

Degradable starch microspheres were used to induce temporary ischaemia measured by electromagnetic flowmetry in colon segments during bowel resection. Severe reversible ischaemia free from unwanted side effects was induced in eight of nine patients. In one of the five patients where the tumour was included in the microsphere-embolised tissue volume no reduction in blood flow was seen. Segmental enteric ischaemia induced by degradable starch microspheres in man seems safe and may be useful for radioprotective purposes in clinical radiation therapy.

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Silicon diodes as detectors for backscatter radiation in photon fields.

We investigated the use of unencapsulated silicon semiconductor detectors for backscatter radiation detection. The results were compared with Monte Carlo (MC) calculations modelling the experimental set-up. A special diode was manufactured, which was designed so that it allowed the positioning of different materials in close contact with the detector surface. Polymethylmethacrylate (PMMA), Pb, Ti and Fe (stainless steel) were used as backscatter materials. The diode signal was measured by integrating the current when irradiating the diode with an equal photon fluence obtained from a medical Co-60 source. When compared to the signal with PMMA as backscatter material the increase in signal was 21%, 27% and 73% for Ti, Fe and Pb, respectively. This is in reasonable agreement with the MC calculations, when taking the effective measurement depth in the Si diode detector into account.

Cobalt Radioisotopes↗