Measurements of relative beta depth doses in 'tissue equivalent' material

Intravesical Y-90 was used in 38 patients with multiple papillary T1 tumors considered beyond control by cystodiathermy. Of the 32 patients available for 3-year observation 19 (60 per cent) were alive after 3 years, 6 had died of progression of the tumor and 7 had died of other causes. Prolonged imporvement was noted in 23 patients (72 per cent). The complication rate was moderate and only 2 patients required cystectomy for symptoms caused by radiation damage alone.

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TLD measurements of dose distribution around a beta-ray applicator

Rudén¹,

Bengtsson²

1974

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Central axis depth dose and isodose curves around a 90Sr applicator used for neurosurgery were measured in a polystyrene phantom, using LiF teflon dosimeters having the shape of discs, 1 mm in diameter and 0.1 mm thick. The minimum distance between the applicator and the dosimeters 0.1 mm. The results were checked at a number of points using a simplified method of calculation. Agreement within experimental error was obtained between theoretical and experimental results at source-detector distances of 2 to 5 mm. At smaller distances, the approximations involved resulted in too high theoretical values. At larger distances the consistency was again poorer. The measured values of absorbed dose have experimental errors of a few per cent.

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Measurements of relative beta depth doses in 'tissue equivalent' material

Cited by 8 publications

References 4 publications

Measurement of depth dose distributions from beta sources in various materials

Measurement of depth dose distributions from beta sources in various materials

Treatment of Multiple Superficial Papillary Tumors of the Bladder by Intracavitary Yttrium-90

TLD measurements of dose distribution around a beta-ray applicator

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