Indications for imaging
Trauma, bone pain, joint replacements, soft tissue
calcifications, osteosarcoma
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Anatomy Demonstrated
Distal and mid to upper shaft and associated soft tissue
structures.
Rt Femur Anatomy
Meschan, I. 1955 An Atlas of Normal
Radiographic Anatomy Saunders, London
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Basic Patient Position
The patient lies supine on the table with the femur under
examination aligned to the midline of the table. The femur is
aligned in slight internal rotation to bring the distal femoral
condyles equidistant from the film, ensure the knee joint is
projected onto the film
Lt Femur Patient Position
Meschan, I. 1955 An Atlas of Normal
Radiographic Anatomy Saunders, London
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Radiation protection
Direct lead rubber gonad protection.
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Central Ray
The vertical central ray is centered to the film midway between
the medial and lateral skin surfaces to include the knee joint
upwards on the film.
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Exposure Factors
| Kv |
mAS |
FFD (cm) |
Grid |
Focus |
AEC |
Cassette |
| 75/80 |
10/20 |
100 |
Yes / No |
Broad |
No / Yes |
35 x 43 cm |
A grid may be required for the more heavily built subject.
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Evaluation of the Image
ID and markers must be present and correct in the appropriate
area of the film
Evidence of collimation on four sides equally around the
centering point.
Limits of the examination, distally the proximal 2 cm of the
tibia, proximally as much of the proximal femur as allowed by
the film and patient size, laterally and medially the skin
margins.
The femoral condyles should be symmetrical.
Optimal exposure should penetrate all the bone structures and
contrast should be low enough to visualise fully the bone and
soft tissue structures.
Rt Femur AP radiograph
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Related Projections
Femur lateral
Pelvis AP
Hip AP & Lat.
Knee AP and Lateral
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Additional modalities
CT
RNI
MRI
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