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Tuesday, September 16, 2008
Monday, September 15, 2008
Bowtie filter
The field of view in the half-fan mode is 45 cm in
diameter with a 14 cm in the cranial caudal extent when SID
is 150 cm. An accessory, called a bowtie filter, is placed in
front of the kV beam to attenuate the edges of the kV beam.
The bowtie filter reduces skin dose, allows larger x-ray tech-
niques to be employed without saturating the detector, reduces
x-ray scatter, and reduces the effects of charge trapping
in the detector.
Source (Nov 2006 Medical Physics "A quality assurance program for the on board imager")
diameter with a 14 cm in the cranial caudal extent when SID
is 150 cm. An accessory, called a bowtie filter, is placed in
front of the kV beam to attenuate the edges of the kV beam.
The bowtie filter reduces skin dose, allows larger x-ray tech-
niques to be employed without saturating the detector, reduces
x-ray scatter, and reduces the effects of charge trapping
in the detector.
Source (Nov 2006 Medical Physics "A quality assurance program for the on board imager")
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