Performing The Afssaps / Euref Calibration Check - AGFA DRYSTAR AXYS Service Manual

DD+DIS033.07E
2.5.6

Performing the Afssaps / EUREF Calibration Check

(1) Leave the service command session.
(2) Connect the printer network cable to the network outlet at the wall.
(3) Consult the "connectivity release document" for the modality connection to
DRYSTAR AXYS Mammo for the proper modality configuration to print the "TG18-
PQC modified 4" test image.
(4) Print the "TG18-PQC modified 4" test image from the modality.
(5) Measure the 18 density values and enter them in the Afssaps / EUREF
Calibration Check Excel sheet. See Figure 17.
EUREF/AFSSAPS GSDF check for printer
Laser:
Measured luminance values
testpattern
TG18-LN12-# p-value
1 0
2 240
3 480
4 720
5 960
6 1200
7 1440
8 1680
9 1920
10 2160
11 2400
12 2640
13 2880
14 3120
15 3360
16 3600
17 3840
18 4080
Result contrast response printer
1,000
0,100
0
(6) Check column "Deviation compared to DICOM (%)": All values have to be < 10%.
- If all values are < 10%, the procedure is finished.
- If one (or more) value(s) are ≥ 10 %, proceed with next section.
(7) Repeat this step for the other film tray, if the printer has two different DT2 Mammo
film formats loaded (e.g. 8x10" DT2 Mammo and 10x12" DT2 Mammo).
The controlled version of this document resides on MedNet. Any printed copy of this document is uncontrolled.
Edition 1, Revision 1
06-2008
deviation compared
to DICOM (%)
Step 2: Check, that deviation is < 10% for all values. If 1 (or more) value > = 10% go to S
Luminance JND deviation compared
L j(L) dL/L to DICOM (%)
1,798105 98,486
3,831783 142,848 0,722 9,0
7,638348 193,970 0,664 4,0
13,07981 241,359 0,525 3,5
21,51446 291,079 0,488 1,0
34,27055 342,479 0,457 3,9
51,35702 390,683 0,399 2,6
75,48349 439,328 0,380 1,8
111,1691 490,605 0,382 3,1
163,9521 544,108 0,384 7,2
231,176 592,847 0,340 2,3
333,7055 646,119 0,363 6,5
470,959 697,023 0,341 1,8
649,724 745,196 0,319 3,5
917,3471 797,368 0,342 4,3
1265,911 846,462 0,319 1,8
1747,063 895,837 0,319 1,3
2467,38 948,924 0,342 6,0
left monitor
DICOM 3.14
+/- 10%
1000 2000 3000 4000 5000
p-values
DOCUMENT CONTROL NOTE:
DRYSTAR AXYS
Adjustments and Calibrations
DICOM 3.14 standard
testpattern Luminance JND dL/L
TG18-LN12 p-value L j(L) dL/L +10%
1 0 1,80 98,486
2 240 4,17 148,511 0,794 0,874
3 480 8,07 198,537 0,638 0,702
4 720 14,11 248,563 0,544 0,599
5 960 23,09 298,589 0,483 0,531
6 1200 36,13 348,614 0,440 0,484
7 1440 54,76 398,640 0,410 0,451
8 1680 81,09 448,666 0,388 0,426
9 1920 117,99 498,692 0,371 0,408
10 2160 169,45 548,718 0,358 0,394
11 2400 240,90 598,743 0,348 0,383
12 2640 339,85 648,769 0,341 0,375
13 2880 476,63 698,795 0,335 0,369
14 3120 665,49 748,821 0,331 0,364
15 3360 926,13 798,846 0,328 0,360
16 3600 1285,79 848,872 0,325 0,358
17 3840 1782,24 898,898 0,324 0,356
18 4080 2467,38 948,924 0,322 0,355
lineair relation between p-value and JN
a: 0,208441
b: 98,4856
Figure 17
Type 5367/100
Repair and Service
Step 1: Enter the measured values he
dL/L
-10% Step # on TG18 image Measured OD LuminanceStep # in CFC calibration screen on printer
1 3,7 1,7981049
0,715 2 3,15 3,8317831
0,575 3 2,78 7,6383476
0,490 4 2,52 13,079807
0,434 5 2,29 21,514455
0,396 6 2,08 34,270551
0,369 7 1,9 51,357016
0,349 8 1,73 75,483485
0,334 9 1,56 111,16915
0,322 10 1,39 163,95211
0,313 11 1,24 231,17597
0,307 12 1,08 333,70551
0,302 13 0,93 470,95902
0,298 14 0,79 649,72404
0,295 15 0,64 917,34706
0,293 16 0,5 1265,9111
0,291 17 0,36 1747,0633
0,290 18 0,21 2467,38
Step 3: Enter these values in CFC* screen on print
Only required if deviation >= 10% (see step 2)
* CFC = Compliance Film Calibration
Chapter 3.6 / 28
Agfa Company Confidential
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