Patent ID: 7039153

Claim:
An imaging tomography apparatus comprising: a first data acquisition system comprising a first radiator that emits radiation in a first fan beam having a first maximum size, and a first data acquisition unit for detecting radiation in said first fan beam; a second data acquisition system, comprising a second radiator that emits radiation in a second fan beam having a second maximum size, different from said first maximum size, and a second data acquisition unit for detecting radiation in said second fan beam; a gantry at which said first and second data acquisition systems are mounted for rotating said first and second data acquisition systems around an examination subject and around a common rotation axis, with a constant angular separation between said first and second data acquisition systems in an azimuthal direction relative to said common rotation axis; and an arrangement for causing radiation from only one of said first and second radiators to reach said examination subiect at a time, in alternation, during rotation of said first and second data acquisition systems.