Checking The Field Limitation - Siemens ARCADIS Avantic Maintenance Instruction

Function tests

6 Checking the field limitation

REGULATION -
Fluoroscopy and radiography using the fluoroscopic imaging assembly with inherently
circular image receptors.
When any linear dimension of the visible area of the image receptor measured through
the center of the visible area is less than or equal to 34 cm in any direction, at least 80
percent of the area of the x-ray field overlaps the visible area of the image receptor.
The check is made at the TV monitor.
Determine the central point at the I.I. input. Use adhesive tape to attach center cross
(with lead ruler).
Open the slot collimator, adjust the iris diaphragm to an opening of about 15 cm.
Perform the test in the C-arm position shown.
Basic position
Fig. 3
Siemens AG
Medical Solutions
C-arm to the left
(top view)
A = mid-point I.I. input
B = middle of the radiation
field
∆ = deviation of A to B
x = deviation in the x-axis
y = deviation in the y-axis
y
Fig. 4
SPR2-330.662.01
Rev. 02 05.06
C-arm to the right
(top view)
x
A
B
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∆