What Gamma Knife is made of

Radiosurgery with beams of gamma rays (Leksell).

• Cobalt-60 sources — has part. About 200 sources in a hemisphere.
• Collimator helmet — has part. It brings the rays to one point.
• Stereotactic head frame — has part. It holds the head precisely in place.
• Radioactivity — uses. Cobalt-60.
• Cobalt — is made of. The sources are cobalt-60.
• Steel — is made of. The collimator helmet is steel.

Gamma Knife

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