A new phantom for the assessment of nuclear medicine imaging equipment

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Abstract
At present available phantoms suffer from a number of problems: the design described is thought to overcome these. The phantom is designed to test the performance of a scintillation camera or scanner, including the display system, investigating the resolution over a wide range of contrast levels. The phantom described offers the possibility of examining the performance of nuclear medicine imaging equipment over a clinically significant range. It allows comparison in a semi-quantitative manner between different machines as well as investigating the effect of different parameters in a given machine and can be used for quality assurance, in all cases taking into account the whole chain between patient and film. The phantom is easy to make, either being milled from a thick sheet or fabricated. The agreement between observers is good though it is hoped to improve it further by the addition of contrast levels of 50 and 30% as it is in this range that discrepancies mostly occur. It offers an easy, practical and realistic method of investigating the performance of imaging devices.

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