Fluke Biomedical 07-649 - Manual (Page 7)

Operation
Setup Procedure Under-Table Units
2
2-1
Section 2
Operation
2.1 Setup Procedure Under-Table Units
1. Attach the side and probe support to the fluoroscopic phantom.
2. Place the probe, resting on the table, in the slot provided in the probe support. The probe should be
centered under the phantom body.
3. Select the 9" field size of the image intensifier. Align the phantom and probe in the center of the
field. If you cannot see the four lead shot, the image intensifier field is less than 9".
4. Bring the image intensifier down until it rests on the top of the phantom side extension. Lock the
image intensifier in this position. Once you have set up the phantom, probe and unit, do not move
them until you have completed the exposure and exposure rate movements.
5. By making fluoroscopic exposure and observing the image of the phantom, adjust the collimator
until the beam is limited in size to the area indicated by the four lead shot marking on the phantom
top (area indicated by the four lead shot located at the center of each edge of the phantom top).
2.2 Setup Procedure Over-The-Table Units
1. Attach the probe support to the fluoroscopic phantom-do not attach the lexan side. Place the
phantom on the tabletop with the probe support nearest the tube head.
2. Place the probe in the slot provided in the probe support. The probe will be centered over the
phantom body.
3. Select the 9" field size of the image intensifier. Align the phantom and probe in the center of the
field. If you cannot see the four lead shot, the image intensifier field is less than 9”.
4. Have the operator position the tube assembly at the normal height for the upper GI examination.
Lock the assembly at this height. Once you have set up the phantom, probe and unit, do not move
them until you have completed the exposure and exposure rate measurements.
5. By making fluoroscopic exposures and observing the image of the phantom, adjust the collimator
until the beam is limited in size to the area indicated by the four lead shot markings on the phantom
(area indicated by the four lead shot located at the center on each edge of the phantom).
2.3 Fluoroscopy Exposure Rate Date
Set the electrometer selector switch to the "Exposure Rate" mode. Without making any changes in the
standard patient techniques, with the phantom and the probe properly positioned, and the beam
collimated to the four markings on the phantom, make an exposure of at least 15-second duration.
Record this exposure rate in mR/min as Fluoroscopy Exposure Rate #1. Record the fluoroscopic kVp
selected as Fluoroscopy kVp #1. If the unit has an mA indicator, read and record the mA value during the
15-second exposure as Fluoroscopy mA #1.
If the exposure rate is greater than 1 R/min, the values are recorded as 1000 mR/min per R/min. For
example, 12 R/min would be recorded as 12000 mR/min.