Author Question: Rotation on a lateral chest is determined by: sternum asymmetry of the SC joints posterior rib ... (Read 13 times)

jhjkgdfhk · **on:** Jul 17, 2018

Rotation on a lateral chest is determined by:

sternum
asymmetry of the SC joints
posterior rib margin
air in the stomach

Question 2

The recommended lead equivalency for gonadal shielding when kVp values are greater than 150 is:

0.50 mm
1 mm
0.75 mm
0.25 mm

jaygar71 · **Reply #1 on:** Jul 17, 2018

Answer to Question 1

posterior rib margin

Rationale: Rotation is determined by examining the posterior rib margin. If rotation is present, the acceptable distance between the posterior rib margins is 1/2 inch or 1 cm.

Answer to Question 2

1 mm

Rationale: 0.25 mm lead equivalency is recommended with kVp values less than 100 . 0.50 mm lead equivalent with kVp 100-150 and 1.0 mm lead equivalent with kVp greater than 150.