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ESTRO SBRT course sept 2013
Yamashita BioMed Res Int 2014 article ID 136513
The mA per frame and
ms per frame are 20
mA/frame and
40ms/frame, which are
used clinically in the
University of
Tokyo Hospital (Figure
4). With those
parameters, the CT
dose index (CTDI)
volume is approximately
12 mGy for 4D
CBCT imaging with 4
minutes per rotation,
measured with a
15 cm length CTDI
phantom.