Table of Contents
Advertisement
1
2
C
ONTENTS
(5) Select "5. SCANNER UTILITY", "8. DATA MANAGEMENT", and "1. SAVE SHADING
AND POLYGON DATA" in sequence.
The shading data and polygon data so corrected is saved in the HD.
(6) If sensitivity correction has been made, select "2. SAVE SENSITIVITY DATA."
The sensitivity data so corrected is saved in the HD.
(7) Exit M-Utility.
[5] Checks on Correction Results
(1) Uniformly expose a 14" x 14" (35cm x 35cm) or 14" x 17" (35cm x 43cm) IP at about 1
mR.
At this time, measure the dosage with a dosimeter. The voltage should be aligned to
80 kV.
SUPPLEMENTARY NOTE
The dosage value of the X-ray exposure represents a value at the center of an IP. However,
the dosimeter cannot be located at the center of the IP during uniform exposure. The dosage
values at the center and outer periphery of the IP should be measured in advance, and the
difference between them should then be calculated to determine the correction dosage value.
(2) Determine the correction dosage value.
Write down the resulting value on your notepad.
(3) Perform recording under SENSITIVITY of the IDT's Test Menu, and generate image
output.
NOTE
Image output should be generated 10 minutes after the uniform exposure of IP.
(4) After checking the film output, take out the IP used for shading correction.
(5) Check the following points on the output film.
• Shading in the main scan direction has been corrected appropriately.
• There are no variations or nonuniformity between polygonal facets in the
subscanning direction.
• The S value on film is within the following range:
182 ≤ S value x correction dosage value ≤ 220
(6) Quit the shading and sensitivity corrections.
If anything abnormal is found on the output film, or it is desired to correct sensitivity
with greater accuracy, take the steps described in "[6] Set Sensitivity Correction" below.
009-051-06
009-051-04
04.20.2001 FM3006
05.31.99 FM2460
3
4
5
6
CR-IR341 Service Manual
7
8
9
10
MC - 141
MC - 141
Advertisement
Chapters
Table of Contents
