The MRI scanner requires more precautions and safeguards (being built around a 1+ tesla magnet), and acquiring images takes more time, thus more human resources

The MRI scanner requires more precautions and safeguards (being built around a 1+ tesla magnet), and acquiring images takes more time, thus more human resources. Edit: to illustrate ris' point (the sibling comment), check this XKCD chart, linked in the article: http://xkcd.com/radiation/ http://xkcd.com/radiation/