Fluke Biomedical 07-553 - Manual (Page 5)

General Information
Introduction
1
1-1
Section 1
General Information
1.1 Introduction
The 07-553 X-Ray Test Pattern is used to evaluate film screen systems and magnification techniques. It
consists of a 50-micron thick lead test pattern encased in plastic. The resolution limit of 10 line pairs per
millimeter is more than adequate for analyzing the resolution problems encountered in medical
radiography.
Figure 1-1 is an enlarged contact radiograph of the test plate. The spacing of the bar pattern varies in
steps between the index marks. For example, the spatial frequency of the pattern between AB is one-half
line pair per millimeter and the spatial frequency between CD is 0.85 line pairs per millimeter.
Figure 1-1