| CPC A61N 5/1045 (2013.01) [B23C 3/00 (2013.01); B23H 9/00 (2013.01); G21K 1/02 (2013.01)] | 19 Claims |

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1. A fin for collimating therapeutic radiation comprising:
a collimation area including a first material, the collimation area having a first external edge, a second external edge facing the first external edge, a third external edge connected to the first external edge and the second external edge, and a fourth external edge, a second external edge facing the first external edge, a third external edge and connected to the first external edge and the second external edge; and
a holding area including a second material,
wherein the collimation area and the holding area are hot isostatically pressed together,
wherein the collimation area is joined to the holding area only along the first external edge,
wherein the first material is configured to collimate therapeutic radiation, and
wherein the holding area is configured to adjust the fin.
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