The invention provides magazines for radioactive brachytherapy seeds. The seed magazines provided herein include housing, seed holder, and pusher components, and optionally have a slidable shield to protect a user from radiation.
1. A seed magazine comprising a housing, a seed holder that comprises two adjacent surfaces, wherein the first of said surfaces defines at least one spring and the second of said surfaces defines a space, and wherein said space is positioned such that said at least one spring can move at least partially into said space when force is applied to said first surface, and a pusher that comprises markings that indicate a number of seeds present in the seed holder, wherein said seed holder comprises a surface defining a recess at least one millimeter in length.
2. The seed magazine of claim 1 , wherein said seed holder comprises a proximal end and a distal end, and wherein said recess extends from said proximal end toward said distal end.
3. The seed magazine of claim 1 , wherein no more than two surfaces of said seed holder define said recess.
4. The seed magazine of claim 1 , wherein said recess is between three and eight millimeters in length.
5. The seed magazine of claim 1 , wherein said recess is between five and six millimeters in length.
6. The seed magazine of claim 1 , wherein the maximum width of said recess is less than five millimeters.
7. The seed magazine of claim 1 , wherein the maximum width of said recess is between 0.5 and 2.5 millimeters.
8. The seed magazine of claim 1 , wherein said seed magazine further comprises a shield, wherein said seed holder defines a slot for retaining radioactive seeds, and wherein at least a portion of said shield is positioned over said seed holder.
9. The seed magazine of claim 1 , wherein the space between said markings is equal to the thickness of a seed.
10. The seed magazine of claim 1 , wherein the pusher further comprises a gauge member with the markings.
11. The seed magazine of claim 10 , wherein the markings further comprise numerical markings.
12. The seed magazine of claim 10 , wherein the markings further comprise gauge markings.
13. The seed magazine of claim 10 , wherein the markings are imprinted on, molded onto or etched into the gauge member.
14. The seed magazine of claim 1 , wherein said housing is hollow, wherein the external surface of said housing defines external threads, wherein the internal surface of said housing defines internal threads, and wherein said external and internal threads have the same pitch.
15. The seed magazine of claim 14 , wherein said external and internal threads are offset to maximize the thickness of said housing between said external and internal threads.
16. The seed magazine of claim 15 , wherein said shield is slidably movable within said housing and said pusher.
17. A seed magazine comprising a housing, a seed holder that comprises two adjacent surfaces, wherein the first of said surfaces defines at least one spring and the second of said surfaces defines a space, and wherein said space is positioned such that said at least one spring can move at least partially into said space when force is applied to said first surface, and a pusher, wherein said seed holder defines a slot for retaining radioactive seeds, wherein said seeds are not visible from outside the seed magazine, and wherein said pusher comprises markings to indicate the number of seeds within said seed magazine.
18. The seed magazine of claim 17 , wherein the space between said markings is equal to the thickness of a seed.