Dose information – Siemens syngo CT 2005C User Manual
Page 31
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Dose Information
31
For spiral scan protocols, the indicated mAs is the
effective mAs per image. The correlation between tube
current mA and effective mAs of spiral scans on a Mul-
tislice CT scanner is given by the following formula:
where Slice collimation refers to the collimation of one
detector row, and nrow is the number of used detector
rows.
Pitch Factor =
Feed/Rot
nrow x Slice collimation
mA = effective mAs x Pitch Factor
Rot Time
Effective mAs = mA x RotTime/Pitch Factor
C2-025.630.01.01.02_APPLICATIONGUIDE_SPIRIT.book Page 31 Friday, April 8, 2005 9:55 AM
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