week 6: special projections (chest and abd)

Question 1

Abd lateral decubitus position has the CR enter at ____

Answer 1

2 inches above the iliac crest

Question 2

Determining air fluid levels in a chest XR requires a completely _____________, as in ____________

Answer 2

erect position with a horizontal CR, PA or decubitus chest

Question 3

all chest XR are taken with an SID of _______

Answer 3

72 inches

Question 4

An AP supine or AP semi-erect chest XR is taken with the IR in __________ orientation

Answer 4

portrait or landscape

Question 5

what is to note about the AP supine/semierect CR for a chest XR?

Answer 5

CR angled caudad to be perpendicular to long axis of sternum (generally a ~5 degree angle)

Question 6

in an AP supine/semierect chest XR, CR angled ________ to be __________ to long axis of _______ (generally a _______________)

Answer 6

caudad, perpendicular, sternum, ~5 degree angle

Question 7

with the chest XR in the supine/semi erect position, it is preferred for patient to be (completely supine/adjusted to semi-erect) if possible

Answer 7

adjusted to semi-erect

Question 8

what are the 3 exceptions noted in the Bontrager book for evaluation criteria of an AP projection of a supine/semi-erect chest XR?

Answer 8

1. Heart appears larger due to an increased mag. from shorter SID and increased OID of heart
2. Possible pleural effusions for this type of patient often obscures vascular lung markings
3. Usually, inspiration is not as full

Question 9

for an AP projection supine/semi-erect chest XR, correct CR angle leads to ____ being in the same horizontal plane with an ________________

Answer 9

clavicles, unobstructed view of apical regions

Question 10

SID for all chest XR, standard or special projections

Answer 10

72 inches

Question 11

IR size for all chest XR, standard or special projections

Answer 11

14x17 inches

Question 12

A lateral decubitus (AP projection) chest XR is taken with the IR in __________ orientation

Answer 12

landscape

Question 13

patient positioning notes for lateral decubitus (AP projection) chest XR (1 of 2)

-cardiac board on cart or _______ under patient
-patient’s ____ extended, both arms raised _______
-back of patient __________

Answer 13

-radiolucent pad
-chin, above head
-firmly against IR

Question 14

patient positioning notes for lateral decubitus (AP projection) chest XR (2 of 2)

-cart ____
-pillow under patient’s ____
-knees __________
-_______________ with no body rotation

Answer 14

-locked
-head
-flexed slightly
-coronal plane parallel to the IR

Question 15

in a lateral decubitus chest XR, for possible air/pneumothorax, suspected side should be _____

Answer 15

up

Question 16

in a lateral decubitus chest XR, for possible fluid/pleural effusion, suspected side should be _____

Answer 16

down

Question 17

what is to note about the CR in a lateral decubitus (AP projection) chest XR?

Answer 17

CR is horizontal, directed to the center of IR at T7 (3 to 4 inches inferior to level of jugular notch)

Question 18

with an AP projection of chest, how can one locate T7?

Answer 18

T7 is 3-4 inches inferior to the level of the jugular notch

Question 19

for exposure in a lateral decubitus (AP projection) chest XR, optimal contrast scale and exposure should result in _______________________________

Answer 19

faint visualization of vertebrae and ribs through heart shadow

Question 20

which needs to be included for an upright abdomen XR: diaphragm or pubic symphysis

Answer 20

diaphragm