Portal de Periódicos da CAPES

Measurements of Surface Dose Using Build-Up Curves Obtained with an Extrapolation Chamber

1975; Radiological Society of North America; Volume: 115; Issue: 2 Linguagem: Inglês

10.1148/115.2.473

1527-1315

Donald Joseph Manson, Don Velkley, James A. Purdy, Gretchen D. Oliver,

Radiation Therapy and Dosimetry

Surface dose was measured in an extrapolation chamber and was found to be less than previously reported. The slope of the build-up curve was less steep with the Clinac 4 than with 60-Co and much steeper with the Clinac 35 at 25 MV than with the betatron at the same energy. The gradient of the depth-dose curve in the build-up region is probably the best indicator of skin damage.