Effect Of Sid On Patient Dose - AGFA DR 400 User Manual

154 | DR 400 | Radiographic Table and X-Ray Tube Stand

Effect of SID on patient dose

Changing the distance of the X-ray tube to the patient affects the dose applied
to the patient.
For example doubling the distance reduces the dose by a factor of 4. The new
dose can be calculated by a formula:
new mAs = known mAs × ( new distance
3231E EN 20210708 1530
2 2
/ old distance )