I have a question i have these lumps on my neck from my previous surgery my doctor thinks there muscle knots can they be seen on a mri ?

Yes: MRI has great resolution for muscle, but it'd be a VERY expensive test to just diagnose some muscle knots. There may be more serious things that an MRI can pick up, i.e. enlarged lymph nodes in your neck, but this would be unlikely unless you were also having fevers, fatigue, night sweats, or some sign of infection. Try warm compresses and a massage to see if they'll go away.