FujiFilm CR-IR 357 Service Manual page 40

5.
Subject the natural radiation and image stored on the employed IP to secondary
erasure.
{Instruction Manual}
 NOTE 
Before secondary erasure, confirm that no important image data is recorded on the
employed IP.
6.
Under the exposure conditions confirmed in step 2, expose a 14" x 14" (35 cm x
35 cm) or 14" x 17" (35 cm x 43 cm) IP to X-ray radiation.
 NOTE 
Use the largest size IP of all the IPs used at the institution.
7.
Read the IP exposed in step 6 during a 1-minute period between 10 and 11
minutes after the exposure by using the "QC/TEST," "Image Format" or "Image
Format - 2," and "SINGLE" CR Console menus, and then output the read image.
014-204-01E
11.10.2005 FM4750
8.
Determine the "S value for 1 mR of radiation" from the displayed S value (the S
value printed on the film or displayed on the CR Console screen) and the average
radiation dose value obtained in step 3.
--- Example ---
Displayed S value:
Average radiation dose value obtained in step 3: 1.04
S value for 1 mR of radiation =
=
=
9.
Check that the "S value for 1 mR of radiation," which was determined in step 8, is
within the control limits.
--- Example ---
Lower control limit value
154 < 208
Check that the "S value for 1 mR of radiation," which was
determined in step 8, is between the upper and lower
control limit values.
 NOTE 
If the "S value for 1 mR of radiation," which was determined in step 8, is not between
the upper and lower control limit values, make sensitivity correction as directed in "15.3
Sensitivity Correction" and then confirm the S value again.
{MC:15.3_Sensitivity Correction}
CR-IR 357 Service Manual
200
Displayed S value x average radiation dose value
200 x 1.04
208
Upper control limit value
< 260
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IN-39