The last cartilage ring on the trachea before it bifurcates into ...

[mydiamond]

The last cartilage ring on the trachea before it bifurcates into the right and left primary bronchi is known as the:
 
 hilum
  carina
  mediastinum
  thyroid cartilage

Question 2

Patients with emphysema should be imaged with which of the following adjustments?
 
 increased collimation
  decrease in kVp
  increased SID
  increase in kVp

[brittanywood]

Answer to Question 1

carina

Rationale: The carina is the lowest cartilaginous ring on the trachea right before the trachea bifurcates into the right and left primary bronchi.

Answer to Question 2

decrease in kVp

Rationale: Destructive pathologies will need a reduction in technical factors to avoid overpenetration since normal tissue is lessened.

[mydiamond]

Thanks for the timely response, appreciate it

[jojobee318]

Excellent