In the US I think that they may be by prescription-only? Maybe not, worth a call to your local outpatient diagnostic imaging center. Don't call a hospital, they'll charge you too much.

I'd guess you could get one from any-old-CT-scanner for something like $500 to $1000? Someone who just bought this Revolution scanner will probably charge much more. Apparently some people get charged upwards of 10k USD [1]!

But honestly if you just want images of your guts you'd be fine with any old CT.

Once you have the 2d axial images, you can probably find open source software that will do the 3d projection.

1 - http://www.consumerreports.org/cro/magazine/2012/07/that-ct-...

You probably don't want to get one without a good reason: this uses x-rays, and you get a considerably-higher dose of radiation than something like a normal chest x-ray. As for other comments saying an older machine would be cheaper, etc., this is true, but older machines actually deliver more radiation.

All that being said, you can get modern CT scans cheaply in countries other than the US. In Japan, for example, there are ex-pat clinics that give comprehensive medical checkups, which include chest CT scans, starting around US$650, which is absolutely incredible compared to costs here in the States.