The radioactive source is a set of 3-wire sources with an inner diameter <1.2 mm and a length not less than 7 cm.The installation arrangement is shown in Figure A.1.

A three-line source phantom was measured in air. The activity in each line source was identical.

Images in two orthogonal directions, centered on the line source axis and within a width range of 2 cm to 4 cm.

The NEMA SPECT Triple Line Source Phantom is positioned at the center of a cylindrical phantom with an inner diameter of 190 mm and an inner height of 200 mm, thereby filling the cylindrical phantom with activity.

Primary Applications:

• Measurement of SPECT tomographic spatial resolution (FWHM)
• Acceptance testing and assessment of rotation center errors
• Quantitative evaluation of reconstruction algorithms and scatter correction methods.