Patent ID: 11903643
Assignee: OLYMPUS CORPORATION
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 7:
8. A lithotripsy apparatus comprising:
a treatment laser beam source configured to emit a treatment laser beam for crushing a stone;
a guide light source configured to emit a guide light;
a photodetector configured to detect a return light including the guide light reflected by the stone; and
a processor comprising hardware, the processor being configured to:
calculate a distance from the treatment laser beam source to the stone on the basis of the return light;
determine whether an amount of change in the distance calculated is aperiodic and exceeds a threshold value; and
in response to determining that the amount of change in the distance calculated is aperiodic and exceeds the threshold value, control the treatment laser beam source to decrease the light quantity of the treatment laser beam.