Section 4 – Quality Control Procedures
4-5
2000 March Rev. B 8186546
Running a Daily QC Test
The MQSA requires that a sensitometric test be run daily and that clinical images be
made only when the control chart is within the control ranges. Kodak recommends
the following laser imager test. Perform this test daily before clinical mammograms
are run, to ensure quality output. Plot the values obtained from the test on the Laser
Imager QC Chart for comparison with the film parameter values established in the
baseline test.
1. Apply power to the 8600 and allow it to warm to READY, as indicated on the
local panel. (The 8600 will print a film calibration sheet, indicating that its
Automatic Image Quality Control system is functioning.)
2. Print a QC Step Wedge film per the procedure on page 5-15 of this User Guide.
3. Use a densitometer to read the designated steps on the test film. Read at the
center of each step. If a clear area on the film was used instead of step 1 in the
baseline tests (see page 4-2), use a clear area in this QC test.
4. Record the date on the control chart. Then plot the DD, MD, and Base Plus Fog
values in the appropriate column on the chart.
5. Determine if any of the values exceeds the control limits for the parameter.
Note
The numbers above and below the center lines on the chart indicate the
control limits. For example, for DD or MD, 0.10 above or below the center line is
approaching the limit, but is acceptable. However, 0.15 above or below the line
is not acceptable.
6. If the values did not exceed a control limit, examine the chart and see if there is
a trend which suggests possible future problems. (This could be, for example,
three or more data points for DD, MD or Base Plus Fog in succession moving
upward or downward.) If the data points have not exceeded the limits, clinical
mammograms can continue to be run.
7. If any value exceeds a control limit, DO NOT run clinical mammograms until the
problem is corrected. Proceed as follows:
a. Circle the out of control point(s) on the chart.
b. Correct the problem. (The fault could be in the film, imager or densitometer,
or in the performance of the QC procedure.)
c. Note the cause of the problem in the “Remarks” section of the control chart.
d. Repeat the step wedge test and graph the parameters on the control chart.
Summary of Contents for Kodak DryView 8600
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