Common Mistakes

Question 1

For Pelvic x-rays, Hip x-rays, and for distal femur, we must

Answer 1

internally rotate the foot 10 degrees to produce anteversion of femur

Question 2

For Lateral Lumbar

Answer 2

we need to make it more posterior - almost going to the butt MCP

Question 3

For spot projections,

Answer 3

10 x 10 area, centre more posterior on the butt,

Question 4

MACCAD

Answer 4

Markers, Angle, Centring, Collimation, Alignment with bucky, Distance,

Question 5

Which projections are 18 x 24?

Answer 5

AP Coccygx

Question 6

What are the 35 x 43

Answer 6

All thoracic, lumbar, distal femur and AP pelvis, pelvis inlet and outlet

Question 7

For a swimmers projection what should be separated

Answer 7

the humeral heads

Question 8

For hip and pelvis we have included

Answer 8

one third of the proximal femur

Question 9

Shenton’s line tells us

Answer 9

whether hip dislocation or fracture is present

Question 10

Pelvic inlet projects

Answer 10

the PS inferiorly

Question 11

Pelvic outlet projects

Answer 11

the PS superiorly

Question 12

Spondylolisthesis

Answer 12

where the neck of the scottie dog is broken

Question 13

Overexposed = what contrast?

Answer 13

High contrast, meaning that the differences in density between tissues and structures are reduced, making it harder to distinguish them

Question 14

Overexposed is when

Answer 14

the images are too dark

Question 15

Underexposed =

Answer 15

low contrast

Question 16

What is the Kvp for distal femur and cervical spine (excl swimmers)?

Answer 16

75kVp

Question 17

Swimmers projection is

Answer 17

90kvp

Question 18

Lat spot projection is

Answer 18

90kVp

Question 19

Pelvic inlet, outlet and lateral hip is what kvp

Answer 19

80kvp

Question 20

Thoracic and Lumbar are

Answer 20

80kVp

Question 21

Sacrum, coccygx are

Answer 21

75kVp

Question 22

For thoracic, you need to

Answer 22

hold your breath

Question 23

For cervical, and lumbar

Answer 23

u need to hold still and have ur breath out

Question 24

In an AP cervical spine XR

Answer 24

we collimate from the bottom of the chin to the jugular notch

Question 25

For oblique cervical we

Answer 25

need a 15 degree angle

Question 26

For lateral and swimmers

Answer 26

we need 180cm FDD

Question 27

For the thoracic only we

Answer 27

need patient to hold their breath in and take the XR

Question 28

What were my mistakes in my previous OSCE?

Answer 28

- too complex terms - cut them out - Setting up too long - need to be proficient, smooth and sharp - Explain the instruction and then position pt

Question 29

Pelvic inlet has a centring at

Answer 29

level of ASIS