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Flashcards in Femur & Pelvis. Deck (166)
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1

AP Femur. Clinical Indications:

Evaluates fractures and/or bone lesions

2

AP Femur. Minimum SID:

40" (102cm)

3

AP Femur. IR size:

14x17" (35x43cm) lengthwise

4

AP Femur. Grid?

Yes

5

AP Femur. kV range:

Analog: 75 +/- 5 kV.
DIgital: 75 - 85 kV.

6

AP Femur. Pt position:

Patient is in supine postion, Femur centered to midline of table.

7

AP Femur. Part position:

-Femur aligned to CR and midline of table or IR.
-*With knee included:* Rotate leg internally about 5 degrees.
-*With hip included:* Rotate leg, internally 15-20 degrees as for AP projection of the hip.
-To ensure knee joint is included on IR - lower IR margin should be about 2" (5cm) below knee joint.
-To ensure hip joint is included on the IR - Top of IR placed at the level of the ASIS.

8

AP Femur. Central Ray:

Perpendicular to femur and IR.

9

AP Femur. Recommended Collimation:

Closely on both side to femur.
End collimation to film borders.

10

AP Femur. Evaluation Criteria:

With knee included:
Distal 2/3rds of distal femur including knee joint.
Knee joint not fully open.
With hip included:
At least the proximal 1/3rd of femur along with the acetabulum and adjacent parts of pubis, ilium, and ischium.

11

AP Femur. Evaluation Criteria: Postion with knee included:

No rotation:
Femoral and tibial condyles appear symmetric.
Patella slightly toward medial femur.
Approximate half of fibular head superimposed by tibia.
Femur centered to collimated field and aligned with long axis of IR.
Knee joint space a minimum of 1" from distal IR margin.
Collimation to area of interest.

12

AP Femur. Evaluation Criteria: Position with hip included:

-Greater trochanter and femoral head and neck
in full profile without foreshortening.
-Lesser trochanter should not project beyond the medial border of the femur.
-Collimated field demonstrates entire hip joint and at least proximal third of femur.

13

Lateral projections of Femur. Mid and distal. Clinical Indications:

Mid and distal femur to include knee joint for detection and evaluation of fractures and /or bone lesions.

14

Lateral projections of Femur. Mid and distal. Minimum SID:

40" (102cm)

15

Lateral projections of Femur. Mid and distal. IR size:

14x17" (35x43cm) lengthwise.

16

Lateral projections of Femur. Mid and distal. Grid?

Yes

17

Lateral projections of Femur. Mid and distal. kV range:

Analog - 75 +/- 5 kV
Digital - 75-85 kV

18

Lateral projections of Femur. Mid and distal. Patient position:

Lateral recumbent.
Or supine for trauma.

19

Lateral projections of Femur. Mid and distal. Lateral recumbent:

-Not for trauma
-Knee is flexed about 45 degrees on affected side
-Femur aligned to midline of table
-Unaffected leg behind to prevent over rotation
-Include knee joint
-Second IR needed to include proximal femur and hip.

20

Lateral projections of Femur. Mid and distal. Trauma Lateromedial:

-Support placed under leg and knee and leg placed in true AP position.
-IR placed on edge against medial aspect of femur to include knee joint.
-Horizontal xray beam directed from lateral side.

21

Lateral projections of Femur. Mid and distal. Central Ray:

Perpendicular to femur and IR.
To midpoint of IR
MInimum 40" SID.

22

Lateral projections of Femur. Mid and distal. Collimation:

On both sides to femur with end collimation to IR borders.

23

Lateral projections of Femur. Mid and distal. Evaluation Criteria:

Distal 2/3rds of distal femur including knee joint.
Because of divergent X-ray beam knee joint will not appear open and distal margins of femoral condyles are not superimposed.

24

Lateral projections of Femur. Mid and distal. Evaluation Criteria: Position:

True lateral:
-Anterior and posterior margins of condyles superimposed.
-Femur centered to collimated field.
-Open patellofemoral joint space.
-Knee joint space on distal IR margin and a minimum of 1" from distal IR margin
-Collimation to area of interest.

25

Lateral projections of Femur. Mid and distal. Exposure:

-Correct use of anode heel effect results in near uniform density of femur.
-Use of compensating filter results in near uniform density (brightness)
-No motion: Clear sharp bony trabecular markings.

26

Mediolateral projection of Femur. Mid and PROXIMAL.

Do not attempt this position for patients with possible fracture of the hip or proximal femur.
Trauma projection: Trauma lateral hip.

27

Mediolateral projection of Femur. Mid and PROXIMAL. Clinical Indications:

Mid and proximal femur for evaluation of fractures and bone lesions.

28

Mediolateral projection of Femur. Mid and PROXIMAL. Minimum SID:

40" (102cm)

29

Mediolateral projection of Femur. Mid and PROXIMAL.
IR size:

14x17" (35x43cm) lengthwise.

30

Mediolateral projection of Femur. Mid and PROXIMAL.
Grid?

Yes