Spect scanning

[vagrantshades]

Yes it would be. Because you're invading the person by putting a substance, contrast, into them to perform the scan.

[tictac]

I thought for MRI it was considered non-invasive because there is no x-rays or radioactive material used.

[Genericname2365]

The Grivas book lists the CT scan being non-invasive as an advantage (due to the contrast being considered non-invasive, so that's confusing.

[vagrantshades]

I never learnt MRI as being 'invasive' if a person is claustrophobic. I just learnt that as a limitation of the MRI scan.

I think for the brain techniques we should take invasive if the body is either being opened up or chemicals are being injected into the body. Thus PET, SPECT and CT would be considered mildly invasive as a substance is injected, but scans such as MRI or fMRI are considered non-invasive because nothing is injected.

[vagrantshades]

I guess if it's a short answer question, or even extended response, you state whether you see it as invasive/non-invasive and WHY. If you can provide a logical explanation as to why you believe the CT scan is non-invasive then you could be fine, but personally I'd rather say CT scan is mildly invasive because it involves the injection of a substance into the patient.