an MRI machine is as tall as your tallest friend and as fat as your fattest friend. none of the sites i went on had the actual dimensions.
An average person cannot buy an MRI machine, as they are reserved for medical purposes. If one was to find an MRI machine for sale, it would be very expensive to buy.
A MRI machine may need maintenance. When the machine gets so old it can cause it to break.
MRI machine
for MRI machine
If the MRI technologist positions you with your leg going into the magnet (the MRI machine) then your head would be out of it. Call the facility where you are scheduled to have the MRI and ask to speak with the MRI technologist and they can fully explain to you exactly how you will be positioned.
Electromagnets
Yes, if the increase in tumor size is smaller than the resolution of the MRI machine, it may be challenging for the MRI to accurately identify the growth.
The mri practice test is designed to ensure understanding of proper use and techniques of the mri. It is simply to weed out the people who should not use the machine.
"The cost of a 3-tesla whole body [MRI] system is more than US$3 million." from ... http://www.ic.gc.ca/epic/site/mitr-crtim.nsf/en/hm00286e.html
Both magnetic- and radio-waves.
if you are an mri tech whis the mri machine uses big magnets to see images it can demagnitize a credit card.