What is a Gamma-Camera or a PET | 合法醫療器材資訊網

AgammacameraoraPETscannerisaverybulkypieceofequipment,whichimpressesorunsettlesmany.Itworkstoadifferentprincipletox-rayequipment, ...

A gamma camera or a PET scanner is a very bulky piece of equipment, which impresses or unsettles many. It works to a different principle to x-ray equipment, whereby an intensive x-ray beam penetrates the patient and illuminates the film behind it for a short while.

In contrast to this, using a suitable detector a gamma camera records over a longer period of time the radiation, which is emitted by the patient due to the application of the radiopharmaceutical, whereby the detector head of the gamma camera is positioned above or below the person under examination. The recorded data are stored on the computer for subsequent evaluation. For standard recordings the detector head of the gamma camera does not move once it is in position for the recording.

During "Single Photon Emission (computed) Tomography (SPECT)" the detector head of the gamm...