US 11,670,431 B2
Radiation source including osmium
Matthew David Butts, Niskayuna, NY (US); and Charles E. Shanks, Arlington Heights, IL (US)
Assigned to MEDI-PHYSICS, INC., Princeton, NJ (US)
Filed by GENERAL ELECTRIC COMPANY, Schenectady, NY (US); and MEDI-PHYSICS INC., Princeton, NJ (US)
Filed on Feb. 14, 2020, as Appl. No. 16/791,344.
Application 16/791,344 is a division of application No. 15/532,089, granted, now 10,600,529, previously published as PCT/EP2015/078713, filed on Dec. 4, 2015.
Claims priority of provisional application 62/087,321, filed on Dec. 4, 2014.
Prior Publication US 2020/0185118 A1, Jun. 11, 2020
Int. Cl. G21G 4/08 (2006.01); G21G 1/00 (2006.01); G21G 1/02 (2006.01); G21G 4/06 (2006.01); G21G 1/06 (2006.01); B29C 39/00 (2006.01); B29K 63/00 (2006.01); B29K 505/08 (2006.01)
CPC G21G 4/08 (2013.01) [G21G 1/001 (2013.01); G21G 1/02 (2013.01); G21G 4/06 (2013.01); B29C 39/003 (2013.01); B29K 2063/00 (2013.01); B29K 2505/08 (2013.01); G21G 1/06 (2013.01); G21G 2001/0094 (2013.01)] 3 Claims
OG exemplary drawing
 
1. A radiation source suitable for diagnostic imaging applications, comprising:
an insoluble radioactive substance uniformly dispersed and suspended in a cured radio-opaque matrix material,
wherein the radioactive substance has a higher density than the matrix material, and the radioactive substance comprises osmium or tungsten particles having an average size in the range of 500 nm to 20 μm,
wherein the radiation source is in the form of a rod cut from a longer rod that has the radioactive substance uniformly dispersed and suspended in the cured radio-opaque matrix material,
wherein the radioactive substance dispersion is uniform longitudinally along the entire length of the cut rod,
wherein the cut rod is less than 10 cm in length.