Hip & SI

Question 1

An RPO AP of SI joint demonstrates which SI joint?

Answer 1

Left

Question 2

Which side is elevated and on the image, with and RPO and LPO AP of SI joint?

Answer 2

The side of interest

Question 3

Where do center the IR during an RPO and LPO AP SI joint?

Answer 3

At level of ASIS

Question 4

Where is the central Ray directed for an RPO and LPO AP SI joint?

Answer 4

Perpendicular to 1” medial to the upside ASIS

Question 5

What structures are seen in an RPO AP of SI joint?

Answer 5

Left SI joint open

Ala of ilium and sacrum not overlapped

Question 6

How do you position an RAO and LAO PA of SI joint?

Answer 6

Prone

Elevate unaffected side 25-30 degrees.

Question 7

What side do we visualize during an RAO and LAO PA of SI joint?

Answer 7

The side that is down and closest to the IR.

Question 8

Where do you aim the central ray for an RAO and LAO PA of SI joint?

Answer 8

Perpendicular to 1” lateral to vertebral spinous process

At level of ASIS

Question 9

How much do you oblique the hip for LPO & RPO of SI joint?

Answer 9

25-30 degrees

Question 10

What is the routine for SI joints?

Answer 10

AP axial sacrum

Bilateral posterior obliques

Question 11

How to position for AP Axial Sacrum

Answer 11

Supine
Align MSP to midline of table and CR
No rotation of ASIS

Question 12

How is the central Ray for AP axial sacrum?

Answer 12

15 degrees cephalic to MSP between ASIS and symphysis pubis.

Question 13

Structures seen on AP axial sacrum?

Answer 13

A non-forshortened AP projection of the sacrum, 2 SI joints, and L5-S1 junction.

Question 14

How do you adjust the IR for a Danelius Miller?

Answer 14

Top of cassette at level of iliac crest.

Adjust IR so it is parallel to femoral neck.

Question 15

Central Ray for Danelius Miller?

Answer 15

It is perpendicular to IR and mid femoral neck.

Question 16

How to position for Sanderson method?

Answer 16

Supine
Oblique pt by propping up affected hip 20-30 degrees.
Rotate leg out about 15 degrees.

Question 17

How is the IR for Sanderson

Answer 17

LW
Parallel to long axis of foot
Adjacent to hip and propped up at an angle

Question 18

How is the central Ray for Sanderson

Answer 18

Perpendicular to IR enters at femoral neck.

Angle CR mediolaterally, and perpendicular to long axis of the foot.

Question 19

How to position for Clements nakayama?

Answer 19

Supine
Affected side close to edge of table
Leg in neutral position

Question 20

How is IR for Clements nakayama?

Answer 20

Propped up in open Bucky tray.

Tilt 15-20 degrees from vertical.

Question 21

How is central Ray for Clements nakayama?

Answer 21

CR angles 15-20 degrees from horizontal.
30-40 degrees mediolateral
Center to enter femoral neck perpendicularly

Question 22

Routine for acetabulum

Answer 22

AP oblique

RAO or LAO

Question 23

How do you position patient for acetabulum

Answer 23

Semi-prone on affected side

Unaffected hip is elevated 30 to 45 degrees

Question 24

Central Ray for acetabulum

Answer 24

Directed 12 degrees cephalic to acetabulum

2” laterally to MSP at inferior level of coccyx

Question 25

AP bilateral frog legs is used to rule out what?

Answer 25

Hip dysplasia

Question 26

Where do you center the IR and CR for an AP Bilateral Froglegs?

Answer 26

IR 1” above SP

CR perpendicular to MSP at 1” above SP

Question 27

Where do you put the top of the cassette for AP pelvis?

Answer 27

1” above the iliac crest

Question 28

How much do you internally rotate feet for AP pelvis?

Answer 28

15-20 degrees

Question 29

What can’t you see on an AP pelvis if the feet are internally rotated 15-20 degrees?

Answer 29

Femoral neck and lesser trochanter

Question 30

In a radiograph for AP pelvis, how can you tell if there is no rotation?

Answer 30

Ala of ilium and obturator Foramen are symmetrical

Question 31

If feet are pointed up, during an AP hip, what is different on image?

Answer 31

See lesser trochanter

Question 32

If foot is externally rotated during and AP hip, what is different on the image?

Answer 32

See more of the lesser trochanter and the femoral neck is forshortened.