Who told you that lie? I spent 2 years in a school of radiography split between classroom instruction and 1800 hours of on-the-job training. With the possible exception of working in an outpatient clinic, a radiographer has to deal one-on-one with patients all day, every day, and that includes a lot of unassisted lifting of patients who cannot help much, if at all.
MRI is a bit better but you still have a lot of physicality involved with getting ill patients on and off the table. The reason I had to retire was that I injured my back to the point of having 2 major lumbar surgeries as well as 3 cervical surgeries. That job is best for young, fit, active folks.
If you want a job where you don't have to move people daily, often without assistance, try a program for Respiratory therapy or a medical lab technologist. Most interactions in both of those fields amount to meeting, identifying the patient and either drawing blood or preparing and administering breathing treatments while the patient is in a bed or wheelchair.
Don't misunderstand, I LOVED doing MRI and enjoyed the interaction with patients but facts are facts and from one day to the next you'd be dealing with little or even NO physical help in transferring - usually overweight - patients. I'd also do some reading into what kinds of procedures you'll have to train in. Not everyone has what it takes to poke a plastic catheter into a patient's rectum and then help him/her roll around on a hard table surface while taking multiple images.