Using Your Supertech® Slide Rule is as Simple as ABC

Step A
Select the exam.

Measure the Patient through the Central Ray.
You are working in cm.

Move the Large Slider until the correct Patient Size in cm thickness is in the opening which
corresponds to the exam.

Black opening is for Adult
Red opening is for Pediatric

Step B
Input the Correction Factor

You will take test X-rays to determine your Machine Correction Factor. This may be adjusted
further by other factors playing into the specific exam you are doing.

Complete instructions for determining and adjusting the
correction factor are provided.

Step C
Turn the Slide Rule Over, Select kV and mA.

From the Selected kV, move right until you are in the column for the selected mA.

Where the kV and mA intersect is the box which tells your exposure time in fraction and in
decimal. On that same line to the far right tells you the MAS which corresponds to the technique
you have selected.

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