A MSc is only worth it depending on the course content, I would recommend the Open University's MSc in Medical Physics. Very good sections on X-ray, Ultrasound and MRI.
There does seem a lot of degree's that are just there for people to say they have done one and like even your School exams you'll probably never use again!
The not putting the pen down stage or getting their head out of the user manual comes between HND and degree level and it is one skill you need to do a MSc.