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You are not talking about an MRI, nor a CT. Magnet is fixed in an MRI and you just pulse fields in the XYZ directions to create gradients of magnetic field. Th
by ta988 3y ago
You are not talking about an MRI, nor a CT.
Magnet is fixed in an MRI and you just pulse fields in the XYZ directions to create gradients of magnetic field. The pulse emission and receiving antennas are fixed too.
In a CT scan, what is rotating is one or many xray sources and one or many detectors plus some electronics and cooling systems if needed.
PET scans have fixed rings of pairs of detectors. But they can also be combined with a CT in the same instrument.
- iancmceachern 3y agoThanks, my bad. Revising my point to be that phasing those fields and controlling the power, is expensive and complicated
- ta988 3y agoAll of that is included in the initial price of the machine. There is no real cost associated when running the machine itself (outside of when a preamp or pulse generator burns but that's rare).