Proper positioning of the AP tibia/fibula requires: the foot to ...

[krzymel]

Proper positioning of the AP tibia/fibula requires:
 
 the foot to be in natural position and the leg adjusted until the intermalleolar line is parallel to the image receptor
  the foot to be dorsiflexed and the toes positioned up
  the foot to be dorsiflexed and the toes positioned up
  the foot to be in natural position and the leg adjusted until the femoral condyles are parallel to the image receptor

Question 2

Where are the sphenoid sinuses located?
 
 within the greater wing of the sphenoid
  within the body of the sphenoid
  within the lateral masses
  within the sella turcica

[bfulkerson77]

Answer to Question 1

the foot to be in natural position and the leg adjusted until the femoral condyles are parallel to the image receptor

Rationale: The AP projection for the tibia/fibula is a true AP when the femoral condyles are adjusted to run parallel to the image receptor. The foot can remain in a natural position.

Answer to Question 2

within the body of the sphenoid

Rationale: The sphenoid sinus is located within the body of the sphenoid, which sits below the sella turcica.

[krzymel]

Excellent

[blakcmamba]

Gracias!