Knee joint ap view

knee joint ap view

1. Knee joint AP view Knee joint radiography

2. The  knee joint  is a hinge type synovial  joint , which mainly allows for flexion and extension (and a small degree of medial and lateral rotation). It is formed by articulations between the patella, femur and tibia. Knee joint

3. Dig

4. Defination The  knee series  is a set of radiographs taken to investigate knee joint pathology, often in the context of trauma The  Knee AP view  is a standard projection to assess the knee joint, distal femur, proximal tibia and fibula and the patella.  Knee ap view radiography

5. trauma bony tenderness at the  head of the fibula isolated patella tenderness patient unable to flex the knee to 90 degrees if the patient is unable to weight bear suspected  osteoarthritis detecting  joint effusions infection indication

6. osteoarthritis

7. Joint effusion

8. Your may be asked to remove some clothing, jewelry, or any metal objects that might interfere with the image. If patient is pregnant, it is important to tell the X-ray technician or her doctor. X-rays are usually avoided during pregnancy because there's a small chance the radiation may harm the developing baby. But if the X-ray is necessary, precautions can be taken to protect the fetus. prepration

9. patient is supine on the table with the knee and ankle joint in contact with the table leg is extended ensure the knee is not rotated positioning

10. radiograph

11. The cassette size used for this examination is 10”x12” and placed vertically directly under the knee joint covering the aspects from 1/3 of distal femur and 1/3 of proximal tibia and fibula. Cassette position

12. anteroposterior projection centering point center of the knee 1.5 cm distal to the apex of the patella collimation superior to include the distal femur inferior to include the proximal tibia/fibula medial to include medial skin margin lateral to include the skin margin  Technical factor

13. Cassette orientation    portrait exposure 60-70 kVp 7-10 mAs SID 100 cm grid no contd.

14. The fibula head is a great indication of rotation, if the fibula head is entirely superimposed, the image is not AP; to correct this you must internally rotate until the knee is in even contact wit the image detector. Very slim patients may require a slight caudal angle to better visualize the joint space in an AP fashion. The opposite applies for larger patients (larger thighs mean the leg may be naturally flexed at rest), requiring a slight cephalic angle. Both angles roughly 5-8 degrees. Practical points