Patent ID: 7841980

Claim:
A treatment system comprising: a first guide component that is used to insert a treatment tool into a body cavity; a second guide component that is used to insert an observation device into the body cavity; a tilt sensor that is provided in the first guide component and detects an angle of inclination of the treatment tool that has been inserted inside the first guide component; an insertion amount sensor that is provided in the first guide component and detects an amount that the treatment tool has been inserted inside the first guide component; a switching device that switches an observation range of the observation device such that the distal end of the treatment tool is displayed in an area that is set within an image of an interior of the body cavity being displayed on a display unit using the observation device that are acquired by the observation device that has been introduced into the body cavity; and a system control unit that drives the switching device so that the observation device tracks a position of a distal end of the treatment tool by defining the position of the distal end of the treatment tool in a three-dimensional coordinate system whose point of origin is a base point provided in the second guide component by using parameters of another three-dimensional coordinate system whose point of origin is a base point provided in the first guide component based on information about the angle of inclination and insertion amount of the treatment tool.