PA/AP oblique Lower GI

Question 1

• How much is the patient rotated?

Answer 1

35-45 degrees

Question 2

• What is the central ray location?

Answer 2

Level of iliac crest, 1-2” lateral of msp on elevated side

Question 3

• What structure(s) are best demonstrated in an RAO position?

Answer 3

Ascending colon, cecum, sigmoid, right colic flexure

Question 4

• What structure(s) are best demonstrated in an LAO position?

Answer 4

Left colic flexure, descending colon,

Question 5

• What structure(s) are best demonstrated in an RPO position?

Answer 5

left colic flexure and descending colon

Question 6

• What structure(s) are best demonstrated in an LPO position?

Answer 6

demonstrates right colic flexure and ascending and sigmoid colon