Apparatus for eluting a daughter radioisotope from a parent radioisotope

Claim 2

In apparatus for eluting a sterile daughter radioisotope from a parent radioisotope comprising a case having exterior walls, a generator including a supply of the parent radioisotope, a primary shield enclosing the generator for shielding against radioactive emissions from the parent radioisotope, means in the case for holding said primary shield in a predetermined position in the case, said primary shield holding means comprising an annular wall defining a compartment for reception of the primary shield, a generally vertical web extending between said annular wall and an exterior wall of the case with spaces on opposite sides of the web, the generator being adapted for flow of said eluant therethrough and into a container; an auxiliary shield of suitable radiation shielding material of generally the height of said primary shield and having an inner surface adapted to be disposed adjacent said annular wall on both sides of said web, said auxiliary shield having a slot therein for receiving said web whereby with the auxiliary shield positioned in the case adjacent the annular wall, and with the web received by the slot, the auxiliary shield is held by the web in position in the case For shielding the user from excessive radioactive emissions from the generator in the event the radiation emissions from the generator exceed the shielding capability of the primary shield, said auxiliary shield having an inner cylindrical surface of generally the radius of curvature of the outer surface of said annular wall, whereby said auxiliary shield is adapted to be positioned adjacent said annular wall, said case further having a bottom wall, end walls, and front and back side walls, said case further having a pair of interior walls extending up from the bottom wall and between the end walls, said annular wall and the compartment formed thereby being disposed between said interior walls, said web extending from said annular wall substantially parallel to said interior walls, and a second compartment extending up from said bottom between the interior walls for receiving means holding a supply of said eluant.

Claim 3

In apparatus for eluting a sterile daughter radioisotope from a parent radioisotope comprising a case having exterior walls, a generator including a supply of the parent radioisotope, a primary shield enclosing the generator for shielding against radioactive emissions from the parent radioisotope, means in the case for holding said primary shield in a predetermined position in the case, said primary shield holding means comprising an annular wall defining a compartment for reception of the primary shield, a generally vertical web extending between said annular wall and an exterior wall of the case with spaces on opposite sides of the web, the generator being adapted for flow of said eluant therethrough and into a container; an auxiliary shield of suitable radiation shielding material of generally the height of said primary shield and having an inner surface adapted to be disposed adjacent said annular wall on both sides of said web, said auxiliary shield having a slot therein for receiving said web whereby with the auxiliary shield positioned in the case adjacent the annular wall, and with the web received by the slot, the auxiliary shield is held by the web in position in the case for shielding the user from excessive radioactive emissions from the generator in the event the radiation emissions from the generator exceed the shielding capability of the primary shield, said auxiliary shield having an inner cylindrical surface of generally the radius of curvature of the outer surface of said annular wall, whereby said auxiliary shield is adapted to be positioned adjacent said annular wall, said case further having a bottom wall, end walls, and front and back side walls, said case further having a pair of interior walls extending up from the bottom wall and between the end walls, said annular wall and the compartment formed thereby being disposed between said interior walls, said web extending from said annular wall substantially parallel to said interior walls, the outer diameter of said annular wall being less than the distance between said interior walls thereby to form a gap between the annular wall and the interior walls, said auxiliary shield having outer vertical edge portions, these edge portions being tapered to fit between said gaps when the auxiliary shield is positioned in the case.

Claim 4

In apparatus for eluting a sterile daughter radioisotope from a parent radioisotope comprising a case having exterior walls, a generator including a supply of the parent radioisotope, a primary shield enclosing the generator for shielding against radioactive emissions from the parent radioisotope, means in the case for holding said primary shield in a predetermined position in the case, said primary shield holding means comprising an annular wall defining a compartment for reception of the primary shield, a generally vertical web extending between said annular wall and an exterior wall of the case with spaces on opposite sides of the web, the generator being adapted for flow of said eluant therethrough and into a container; an auxiliary shield of suitable radiation shielding material of generally the height of said primary shield and having an inner surface adapted to be disposed adjacent said annular wall on both sides of said web, said auxiliary shield having a slot therein for receiving said web whereby with the auxiliary shield positioned in the case adjacent the annular wall, and with the web received by the slot, the auxiliary shield is held by the web in position in the case for shielding the user from excessive radioactive emissions from the generator in the event the radiation emissions from the generator exceed the shielding capability of the primary shield, said auxiliary shield having an inner cylindrical surface of generally the radius of curvature of the outer surface of said annular wall, whereby said auxiliary shield is adapted to be positioned adjacent said annular wall, said case further having a bottom wall, end walls, and front and back side walls, said case further having a pair of interior walls extending up from the bottom wall and between the end walls, said annular wall and the compartment formed thereby being disposed between said interior walls, said web extending from said annular wall substantially parallel to said interior walls, the outer diameter of said annular wall being less than the distance between said interior walls thereby to form a gap between the annular wall and the interior walls, said auxiliary shield having outer vertical edge portions, these edge portions being tapered to fit between said gaps when the auxiliary shield is positioned in the case.