15
Phantom Desiccation
Over time, the phantom’s water-based gel will slowly lose moisture. This process is ac-
celerated by high temperatures, incorrect storage, and damage to the case or scanning
surface. Consistently storing the phantom in an air-tight container will contribute greatly
to long phantom life. A properly stored phantom will reduce the amount of moisture lost
per year.
For most climate-controlled environments, the phantom weight should be checked
every six months. Phantoms used in high temperature/low humidity environments or in
mobile situations should be tested more frequently. As the phantom desiccates, the
scanning surface may flatten out. It is suggested that the phantom be sent in for rejuve-
nation once it has lost 15 grams of its total weight. When this occurs, contact GAMMEX
(1-800-GAMMEX-1).
Charts and Graphs
Refer to the Charts and Graphs section of the manual to find the appropriate charts
and graphs for your 403 LE phantom, which include:
Phantom Weight Chart
Data Sheet
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