Chest

Question 1

what is the SID used for CXR

Answer 1

180cm

Question 2

what is the kV range used for CXR

Answer 2

110-125kVp

Question 3

what is the mAs range used for CXR

Answer 3

1.5-2.5mAs

Question 4

do you use a grid for CXRs

Answer 4

yes

Question 5

what AEC chambers should be selected for PA CXRs

Answer 5

side chambers

Question 6

what AEC chambers should be selected for lateral CXRs

Answer 6

middle

Question 7

what are the breathing instructions for CXR

Answer 7

breath in and hold your breath

expose while inspiration is suspended

Question 8

for an erect PA CXR what should be the patient positioning

in terms of feet, chin and hands and arms/shoulders

Answer 8

feet spread slightly, weight distributed evenly on both feet

chin resting on bucky

hands on hips, palms out

elbows flexed and shoulders rolled forward against bucky and relaxed downwards

Question 9

for an sitting PA CXR what should be the patient positioning

Answer 9

hold handles of bucky

shoulder down and rolled forwards

Question 10

what is the CP for CXR

Answer 10

perpendicular to midline down the spine at T7 level (inferior border of scapula)

Question 11

for an lateral erect CXR what should be the patient positioning

in terms of feet, chin and hands and arms/shoulders

Answer 11

MSP parallel to bucky

weight evenly distributed on both feet, feet slightly apart

arms above head

chin up

Question 12

for an lateral seated CXR what should be the patient positioning

Answer 12

sit upright and use wedge support pad to get to 90*

move bed so left side of chest is against the bucky

patient hold onto the support bar with chin up

Question 13

what side is the lateral CXR taken from

Answer 13

left touching IR

Question 14

what is the patient positioning for AP lordotic CXR

in terms of clavicles and lungs

Answer 14

clavicles out of the way by having the patient lean back

clavicle above apices

Question 15

what is the CP for AP lordotic CXR

Answer 15

perpendicular to the mid sternum

Question 16

for a supine chest x ray what might happen in regards to the image and the SID

Answer 16

cant get 180cm SID so heart might be magnified

Question 17

what is the coned view for

Answer 17

visualising the lower ribs better

Question 18

what is the soft tissue lateral neck view patient positioning in terms of shoulders, chin

Answer 18

rotate shoulders back

lift chin slightly and look straight ahead

Question 19

what is the CP for soft tissue lateral neck

Answer 19

perpendicular to upper airway

Question 20

in a PA CXR what does rolling the shoulder forwards do

Answer 20

moves scapula out of the lung fields

Question 21

in a PA CXR what does relaxing the shoulders downwards do

Answer 21

move clavicles below the apices

Question 22

what is the image critique for PA CXRs in terms of positioning

what shows no rotation
what should the shoulders look like

Answer 22

no rot = centre of clavicles equidistant from center of spine

shoulders not raised, scapula clear from lung fields, calvicles project horizontally not obscuring apices

Question 23

what is the image critique for PA CXRs in terms of breathing technique

Answer 23

full inspiration shown by

6-8 anterior ribs
10-12 posterior ribs

no breathing = sharp dome of diaphragm

Question 24

what is the image critique for lateral CXRs in terms of positioning

what shows no rotation
what should the shoulders look like

Answer 24

thoracic vertebrae bodies lateral
lateral sternum not superimposed by ribs/lungs

arms raised and clear apical region

no rotation or tilt

Question 25

what is the image critique for PA CXRs in terms of anatomy of interest

Answer 25

apices to base of lungs

costophrenic angles

Question 26

what indicates good exposure in a CXR image for evaluation

Answer 26

many shades of grey = sufficient contrast

optimum density = see ribs clearly and outline of vertebral bodies

no grid cutoff or movement blur