BEAM-FLATTENING FILTERS FOR COBALT-THERAPY UNITS
Results with a removable aluminum beam flattener for both normal and wedge field isodose distributions are described. The removable thin aluminum absorbers placed in the central portion of the beam from a Co60 source produced flattened isodose curves, with a more homogeneous distribution and a slightly increased useful beam width. The decrease in output was 9%. Used in conjunction with wedge filters, the absorbers considerably improved the shape and slope of the isodose curves. Filter dimensions are directly applicable to other Model A untts wlth a 2.5 cm diameter source. Although the dimensions of the beamflattening filters would have to be determined, the general method is applicable to all units. (P.C.H.)
- Research Organization:
- Ontario Cancer Foundation, Hamilton, Ont.
- NSA Number:
- NSA-16-014444
- OSTI ID:
- 4795407
- Journal Information:
- Radiology (U.S.), Journal Name: Radiology (U.S.) Vol. Vol: 78; ISSN RADLA
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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