Patent Number: 
Section: claims

1. A radiographic shield comprising:a first half presenting a first face;a second half presenting a second face, the second face being engaged against the first face in a first position and being separated from the first face in a second position;wherein the first half includes a first convex curved protrusion and a first concave curved undercut recess and the second half includes a second convex curved protrusion and a second concave curved undercut recess, wherein, in the first position, the first convex curved protrusion is engaged within the second concave curved undercut recess and the second protrusion is engaged within the first concave curved undercut recess whereby the first half and the second half have a single degree of freedom of relative motion; anda passageway formed between the first face and the second face, the passageway including a first end opening and a second end opening, the passageway including a circuitous element wherein there is no line of sight between the first end opening and the second end opening, the passageway including a portion for shielding a radiographic source prior to projecting the radiographic source during a projector mode. 2. The radiographic shield of claim 1 wherein the first and second halves are comprised of tungsten. 3. The radiographic shield of claim 1 wherein the first half and the second half are manufactured from a single block of material using electrical discharge machining. 4. The radiographic shield of claim 1 wherein the circuitous element includes a central portion of the passageway which rises upwardly to prevent a line of sight between the first end opening and the second end opening. 5. The radiographic shield of claim 1 wherein the circuitous element includes an at least partially S-shaped element. 6. The radiographic shield of claim 1 further including a radiographic shutter mechanism for selectively opening and closing the passageway. 7. The radiographic shield of claim 6 wherein the radiographic shutter is made from tungsten. 8. The radiographic shield of claim 6 wherein the radiographic shutter is manually operated. 9. The radiographic shield of claim 8 further including a screw for manual operation of the radiographic shutter.