Dynamic tumor radiation treatment apparatus and program

A dynamic tumor radiation treatment apparatus, comprising:

• gamma ray detecting means for detecting an annihilation gamma ray emitted from a radiopharmaceutical that accumulates in a tumor by dosing in vivo by setting a plurality of measuring regions at a tumor boundary part or a boundary part of a stationary displaced tumor;
• boundary threshold storage means for storing the threshold of counting rate according to a relationship between said counting rate of the annihilation gamma ray and a displacement of a radiation source;
• gamma ray counting rate computing means for computing the counting rate according to a detection signal of an annihilation gamma ray detected by said gamma ray detecting means;
• threshold comparing means for comparing the counting rate of annihilation gamma rays acquired from said gamma ray counting rate computing means with the threshold of the counting rate acquired from said boundary threshold storage means;
• tumor position judging means for judging whether or not the tumor is displaced out of a radiation irradiation spot according to results by said threshold comparing means;
• and
• irradiation control means for making a control to stop radiation irradiation by a therapeutic radiation irradiation means when said tumor position judging means judges that the tumor is displaced out of the radiation irradiation spot or for outputting a stop command signal.

A dynamic tumor radiation treatment program for causing a computer to function by the program, wherein the program comprises:

• detecting an annihilation gamma ray emitted from a radiopharmaceutical that accumulates in a tumor by dosing in vivo with a gamma ray detecting means;
• storing threshold of counting rate according to a relationship between said counting rate of the annihilation gamma ray and a displacement of a radiation source with a displacement threshold storage means;
• computing a counting rate according to a detection signal of an annihilation gamma ray detected by said gamma ray detecting means with a gamma ray counting rate computing means;
• comparing the counting rate of annihilation gamma rays acquired from said gamma ray counting rate computing means with the threshold of the counting rate acquired from said displacement threshold storage means with a threshold comparing means;
• judging whether or not the tumor is displaced out of a radiation irradiation spot according to results by said threshold comparing means with a tumor position judging means;
• and
• making a control to stop radiation irradiation by a therapeutic radiation irradiation means when said tumor position judging means judges that the tumor is displaced out of the radiation irradiation spot or for outputting a stop command signal.

A dynamic tumor radiation treatment program for causing a computer to function by the program, wherein the program comprises:

• detecting an annihilation gamma ray emitted from a radiopharmaceutical that accumulates in a tumor by dosing in vivo by setting a plurality of measuring regions at a tumor boundary part or a boundary part of a stationary displaced tumor with a gamma ray detecting means;
• storing a threshold of counting rate according to a relationship between said counting rate of the annihilation gamma ray and the displacement of a radiation source in a measuring region with a boundary threshold storage means;
• computing the counting rate according to a detection signal of an annihilation gamma ray detected by said gamma ray detecting means with a gamma ray counting rate computing means;
• comparing with a threshold comparing means the counting rate of annihilation gamma rays acquired from said gamma ray counting rate computing means with the threshold of the counting rate acquired from said displacement threshold storage means;
• judging whether or not the tumor is displaced out of a radiation irradiation spot according to results by said threshold comparing means with a tumor position judging means;
• and
• controlling with a irradiation control means to stop radiation irradiation by a therapeutic radiation irradiation means when said tumor position judging means judges that the tumor is displaced out of the radiation irradiation spot or for outputting a stop command signal.