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Lateral weight bearing foot |
- Have patient stand erect, with weight evenly distributed.
- Have patient stand on wood blocks placed on a step stool or the foot rest attached to the table, You also may use a special wooden box with a slot for the cassette. (It has to be high enough form the floor to get the xray tube down into a horizontal beam position.)
- Provide some support for patient to hold onto for security.
- support vertical cassette between feet, with long axis of foot aligned to long axis of IR.
- Changed cassettes and turn patient for lateral of other foot for comparison after first lateral has been taken.
Cenral Ray:
- Direct CR horizontally to level of base of third metatasals.
- Minimum SID of 40 inches (100cm)
Collimation:
- Collimate to margins of feet (foot).
Radiographic Criteria on Lateral Foot Weight Bearing:
Structure Shown for Lateral Foot Weight Bearing
- The entire foot should be demonstrated, along with a minimum of 1 inch or 2 cm of distal tibia-fibula.
- Distal fibula should be seen superimposed over posterior half of the tibia, and plantar surfaces of heads of metatarsals should appear directly superimposed if no rotation is present.
![lateral foot weight bearing lateral foot weight bearing](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiidxAe8UwkTQkX8eH2jBAb9DhvSFsSChFon85KMntt68KpwF6i6dZOh6dPUdZ9kM046gyukUUb-_iRKfjVSA9l-q6yRB3HY8VwjQ62q9VRawIW41rRPD0U9PMW2Mm1mKioZKz4neE3ymQd/s320/Lateral+wieght+bearing+foot+radiograph.png)
Collomation and Central Ray:
- Center of collimated field (CR) should be to level of base of third metatarsal.
- Four sided collimation should include all surrounding soft tissue from the phalanges to the calcaneus and from the dorsum to the plantar surface of the foot with approximately 1 inch or 2 cm of the distal tibia fibula demonstrated.
Exposure Criteria of Lateral Foot Weight Bearing:
- Optimal density and contrast should visualize soft tissue and bony borders of superimposed tarsals and metatarsals.
- Adequate penetration of x-ray in the midfoot region.
- Bone trabecular marking should be sharp.
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