Author Question: When performing a PA chest, which topographical landmark will determine the proper centering level ... (Read 93 times)

Frost2351 · **on:** Jul 17, 2018

When performing a PA chest, which topographical landmark will determine the proper centering level on the patient?

top of the shoulders
lower rib margin
inferior angle of scapula
vertebra prominens

Question 2

Which of the following would be the best technical factors to consider for a mediolateral knee on a hypersthenic patient?

70 kVp and tabletop
70 kVp and table Bucky
60 kVp and tabletop
60 kVp and table Bucky

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

Answer to Question 1

inferior angle of scapula

Rationale: The thoracic vertebrae 7/8, which corresponds to the inferior angle of the scapula, determines the proper centering level on the patient. This landmark could be palpated before wrapping the arms around the upright Bucky to roll the shoulders forward and remove scapulae from the lung field.

Answer to Question 2

70 kVp and table Bucky

Rationale: The knee on an adult typically exceeds 10 cm so in most cases, adult patients can be imaged in the table Bucky if in the department or with a grid. Part thickness of the knee will correspond to an average of 65-70 kVp.