I suggest that this can be done guided with any imaging tools 

It depends upon the indication. and the anatomical landmark disturbance. With any type of airway obstruction an open tracheostomy under local anesthetic is the safest option. If the patient is already intubated then care needs to be taken with respect to the location of the great vessels during perc tracheostomy

yes it depends on the anatomy but I think percutanous is less invasive than open traditional one if you can use any guiding tool . Entubated patient my  be more easier as the tube make use of guiding tools more helpfull 

I agree with you but at times of extreme emergency, crico-thyrotomy may be the easiest and most effective way of saving the patient.s life.

Yes Dr.saileswar in emergency cases crico thyroid membrane route may be the easy way but with hazards 

PCDT may be also very fast in well trained hands

the problem is the changed missed landmarks