Scintillation probe and intra-tube cavity insertable radioactive ray detecting apparatus

A scintillation probe insertable into a tube cavity of a living body, comprising:

• an insertable portion extending in a longitudinal direction, said insertable portion having a tip portion;
• first and second scintillators disposed in said tip portion, shielded from external light, and positioned adjacent to each other, each of said scintillators individually emitting light in response to a detection of radioactive rays;
• first and second light transmitting means respectively connected to carry light emitted by each of said first and second scintillators;
• and
• first and second photoelectric converting means receiving respectively the light carried by said first and second light transmitting means, for converting the light to electric signals;
• and an analyzer means connected to an output of the photoelectric converting means to count the radiation emitted from the vicinity of the tip portion of the probe.

An intra-tube cavity insertable radioactive ray detecting apparatus, comprising:

• an insertable portion extending in a longitudinal direction, said insertable portion having a tip portion;
• first and second scintillators disposed in said tip portion, shielded from external light, each of said scintillators individually emitting light in response to detection of radioactive rays;
• first and second light transmitting means respectively connected to carry light emitted by each of said first and second scintillators;
• and
• first photoelectric converting means and second photoelectric converting means receiving respectively the light carried by said first and second light transmitting means, for converting the light to electric signals;
• an output signal of said first photoelectric converting means constituting a gate signal;
• a counting means responsive to said output of said first photoelectric converting means, for performing either one of a synchronous count and an asynchronous count with output signal from said second photoelectric converting means by using said gate signal.

A scintillation probe insertable into a tube cavity of a living body, comprising:

• an insertable portion extending in a longitudinal direction, said insertable portion having a tip portion;
• first, second, and third scintillators disposed in said tip portion, each shielded from external light, and positioned adjacent to each other, each of said first, second, and third scintillators individually emitting light in response to a detection of radioactive rays;
• first light transmitting means, second light transmitting means, and third light transmitting means respectively connected to carry light emitted by each of said first, second, and third scintillators;
• and
• first, second, and third photoelectric converting means receiving respectively the light carried by said first, second, and third light transmitting means, for converting the light to electric signals.