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Dosimetry calculations for iridium-192 sources generally assume that a sufficient medium surrounds both the iridium source(s) and the point of calculation so that full scattering conditions exist. In several clinical applications the iridium sources may be anatomically located so that the full scattering requirement is not satisfied. To assess the magnitude of this problem, relative measurements were made with a small ionization chamber in phantoms near air and lung-equivalent interfaces. Dose reduction caused by decreasing the volume of scattering material near these interfaces was then evaluated for a few clinical applications. The results show that reductions on the order of 8% may be expected at the interface with minimal dose reduction within the volume of the implant itself. In addition, the results indicate the verification of source strength of iridium sources in phantom require phantom dimensions determined by the source-chamber separation distance.
C F Serago, and
P V Houdek, and
V Pisciotta, and
J G Schwade, and
A A Abitbol, and
A A Lewin, and
D O Poole, and
V Marcial-Vega
May 1971,
La Radiologia medica,
C F Serago, and
P V Houdek, and
V Pisciotta, and
J G Schwade, and
A A Abitbol, and
A A Lewin, and
D O Poole, and
V Marcial-Vega
April 1983,
Physics in medicine and biology,
C F Serago, and
P V Houdek, and
V Pisciotta, and
J G Schwade, and
A A Abitbol, and
A A Lewin, and
D O Poole, and
V Marcial-Vega
April 1966,
Acta radiologica: therapy, physics, biology,
C F Serago, and
P V Houdek, and
V Pisciotta, and
J G Schwade, and
A A Abitbol, and
A A Lewin, and
D O Poole, and
V Marcial-Vega
June 1984,
The British journal of radiology,
C F Serago, and
P V Houdek, and
V Pisciotta, and
J G Schwade, and
A A Abitbol, and
A A Lewin, and
D O Poole, and
V Marcial-Vega
January 1969,
Annales de radiologie,
C F Serago, and
P V Houdek, and
V Pisciotta, and
J G Schwade, and
A A Abitbol, and
A A Lewin, and
D O Poole, and
V Marcial-Vega
October 1986,
The British journal of radiology,
C F Serago, and
P V Houdek, and
V Pisciotta, and
J G Schwade, and
A A Abitbol, and
A A Lewin, and
D O Poole, and
V Marcial-Vega
January 1983,
Medical physics,
C F Serago, and
P V Houdek, and
V Pisciotta, and
J G Schwade, and
A A Abitbol, and
A A Lewin, and
D O Poole, and
V Marcial-Vega
January 1998,
International journal of radiation oncology, biology, physics,
C F Serago, and
P V Houdek, and
V Pisciotta, and
J G Schwade, and
A A Abitbol, and
A A Lewin, and
D O Poole, and
V Marcial-Vega
February 1989,
The British journal of radiology,
C F Serago, and
P V Houdek, and
V Pisciotta, and
J G Schwade, and
A A Abitbol, and
A A Lewin, and
D O Poole, and
V Marcial-Vega
June 1982,
Nuklearmedizin. Nuclear medicine,
