Lunar DPX-IQ, Operator'S Manual, Page: 73 / 166

DPX-IQ Operator’s Manual Femur B-5
B.2 Acquisition Information
During a femur image acquisition, refer to the information that follows to help you
complete the acquisition procedure.
B.2.1 Position Rice Bags
A common tissue-equivalent material is white, uncooked rice. LUNAR recommends
you use 10 cm of rice to equal 8 cm of soft tissue. The minimum tissue equivalent
thickness must be 15 cm for
750µ
A scans and 18.75 cm for 3000
µ
A scans. Figure B-
5 shows the correct position of rice bags:
➊
Soft tissue of leg
➋
Femur
➌
If necessary, use two rice bags to get 18.75 cm of tissue equivalent material (for
a 3000
µ
A scan).The top rice bag is tight against the leg to prevent air gaps. Let
the patient hold the bag(s) in position if necessary.
Figure B-6. Rice bags (numbers are for a 3000
µ
A scan)
B.2.2 Monitor the Scan
After the scan is started, monitor the first few scan lines to make sure the detector is
positioned correctly.
If white lines are shown on the scan image, stop the scan and make sure there is at
least 15 cm of tissue equivalent material around the patient’s leg next to the greater
trochanter (refer to section B.2.1). Position the laser light again and start the scan.
15 cm
➊
➋
➌
18.75 cm