Which level of the cervical vertebrae is most critical to ...

[yoooooman]

Which level of the cervical vertebrae is most critical to evaluate on a trauma cross-table c-spine?
 
 C7-T1
  C6-7
  C1-2
  C4-5

Question 2

Which of the following is a reason why a tungsten target is preferred?
 
 thermal conductivity
  improved efficiency
  all of these answers apply
  high melting point

[nixon_s]

Answer to Question 1

C7-T1

Rationale: Subluxation at the level of C7-T1 is possible and this area can be extremely difficult to image. Misalignment at this level could be a cause of patient paralysis.

Answer to Question 2

all of these answers apply

Rationale: Tungsten is the preferred target material because it ahs a high atomic number, has a high melting point, and thermal conductivity. Its high atomic number improves efficiency. Its high melting point prevents pitting and cracking. Its thermal conductivity dissipates heat.