LORAD AFFINITY Series - Magnification Full Field (18 X 24 CM) Aperture Alignment (SM FS)

4-50 P/N 9-500-0255
Service Manual
Chapter 4: Calibrations and Performance Checks
X-ray and Light Field Check and Alignment Procedures
7.5 Magnification Full Field (18 x 24 cm) Aperture Alignment (SM FS)
Note… The Auto Aperture must be retracted for this procedure by placing a 24 x 30
cm Cassette Sensor Simulator on the breast tray. (Use the Image Receptor
Phantom Tool, PN 9-060-0403 or, if not available, strips of reflective tape
can be used.)
1. Remove the four outer screws securing the top plate of the Aperture (Figure 4-11, Item
1).
2. Remove the top plate and left/back alignment blade (Figure 4-11, Item 2).
3. Slightly loosen the two inner screws securing the lower right/front blade (Figure 4-11,
Item 3) to the base plate (Figure 4-11, Item 4) of the aperture, just enough so that mini-
mal effort is required to move the blade.
4. Insert the aperture into the tubehead slot.
5. Set the exposure techniques for Small focal spot, Manual, 25 kV and 100 mAs.
6. Making exposures as necessary, adjust the right and front edges of the blade to align
within the markings on the alignment template.
7. Tighten the two inner screws, securing the lower shield to the aperture base plate.
8. Remove the Auto Aperture from the tubehead slot.
9. Replace the top plate and left alignment blade. Leave the screws loose enough so mini-
mal effort is required to move the blade.
10. Slide the Auto Aperture into the tubehead slot.
11. Make exposures as necessary to adjust the left and rear edges of the blade to align within
the markings on the alignment template.
12. Tighten the four outer screws, securing both shields to the upper and lower aperture
plates.
13. Verify the beam position again to ensure that the blades did not move when tightening
the hardware.
7.6 10 cm Coned-down Contact Aperture Alignment (LG FS)
1. Loosen the screws securing the shield to the aperture. Insert the 10 cm Coned-down
Contact Aperture (Figure 4-12, Item 3) into the tubehead slot.
2. Set the exposure techniques Large focal spot, Manual, 25 kV and 100 mAs.
3. Make an exposure. Adjust the front edge of the aperture so the X-ray field aligns with the
markings on the alignment template and center the image side-to-side.
4. Tighten the four outer screws, securing the shield to the upper and lower aperture plates.
5. Verify the beam position again to ensure that the blades did not move when tightening
the hardware.