Radiation Protection

Differences in limb length are common in children and may occur in association with various disorders. Patients with unequal limb growth may require yearly radiographic evaluations. More frequent examinations may be necessary in patients who have undergone surgical procedures to equalize limb length. One treatment method controls bone growth on the normal side usually by means of metaphyseal-epiphyseal fusion at the distal femoral or proximal tibial level. Another treatment technique is to increase the growth of the shorter limb by surgically cutting the femur or tibia-fibula, or both. A frame is placed around the cut ends and extended to the outside of the body. Gradual pressure on the frame separates the bone, extends the leg, and promotes healing at the same time.

Because patients with limb length differences require checkups at regular intervals over years, gonad shielding is necessary to guard their well-being. In addition, careful patient positioning, secure immobilization, and accurate centering of a closely collimated beam of radiation are important to prevent unnecessary repeat exposures.

Localization of Joints

For the methods that require centering of the ray above the joints, the following steps should be taken:

Mar 4, 2016 | Posted by in GENERAL RADIOLOGY | Comments Off on LONG BONE MEASUREMENT

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