Method of controlling a medical master/slave system

1. A method of controlling a medical master/slave system comprising a bendable master apparatus operated by an operator and a bendable slave apparatus inserted through the body and a control unit for gaining a control of the master apparatus and the slave apparatus, the method comprising:

an ordinary actuation mode configured to:

detect a bending direction of the master apparatus;

calculate a command value of the slave apparatus such that a bending direction of the slave apparatus becomes similar to the bending direction of the master apparatus; and

enter the command value in the slave apparatus so as to actuate the slave apparatus;

a reversal actuation mode configured to:

detect the bending direction of the master apparatus;

calculate the command value of the slave apparatus such that the bending direction of the slave apparatus becomes similar to the bending direction of the master apparatus;

correct the command value by reversing the sign of the command value; and

enter the command value in the slave apparatus so as to actuate the slave apparatus; and

a transition mode configured to:

stop to actuate the slave apparatus; and

transit between the ordinary actuation mode and the reversal actuation mode.

2. The method of controlling the master/slave system as recited in claim 1 ,

wherein in the reversal actuation mode:

determining whether or not a reversing portion of the slave apparatus collides with a non-reversing portion of the slave apparatus; and

in response to determining that the reversing portion of the slave apparatus collides with the non-reversing portion of the slave apparatus, restricting the operation of the master apparatus.

3. The method of controlling the master/slave system as recited in claim 1 ,

wherein in the transition mode from the ordinary actuation mode to the reversal actuation mode, the master apparatus is actuated to an initial position.

4. The method of controlling the master/slave system as recited in claim 1 ,

wherein in the transition mode from the reversal actuation mode to the ordinary actuation mode, the master apparatus is actuated in such a way as to become similar to the slave apparatus.

5. The method of controlling the master/slave system as recited in claim 1 ,

wherein the ordinary actuation mode makes a transition to the transition mode upon detection of a specific posture taken by the slave apparatus.

6. The method of controlling the master/slave system as recited in claim 1 ,

wherein the ordinary actuation mode presents whether or not a transition to the transition mode is made to the operator who operates the master apparatus upon detection of a specific posture taken by the slave apparatus.

7. A medical system comprising:

a bendable master apparatus configured to be operated by an operator;

a bendable slave apparatus configured to be inserted through the body;

a control unit configured to control both the master apparatus and the slave apparatus, based on a plurality of modes, wherein the plurality of modes comprises:

an ordinary actuation mode configured that the slave apparatus is actuated such that a bending direction of the slave apparatus becomes similar to a bending direction of the master apparatus;

a reversal actuation mode configured that the slave apparatus is actuated in such a way as to be reversed a bending direction of the slave apparatus relative to a bending direction of the master apparatus; and

a transition mode configured to:

stop to actuate the slave apparatus; and

in response to transit from the ordinary actuation mode to the reversal actuation mode:

actuate the master apparatus to an initial position;

in response to transit from the reversal actuation mode to the ordinary actuation mode:

actuate the master apparatus so as to be similar to a bending direction of the slave apparatus; and

restart to actuate the slave apparatus after actuating the master apparatus.

8. The medical system according to claim 7 ,

wherein in the reversal actuation mode, the control unit is configured to:

determine whether or not a reversing portion of the slave apparatus collides with a non-reversing portion of the slave apparatus; and

in response to determining that the reversing portion of the slave apparatus collides with the non-reversing portion of the slave apparatus, restrict the operation of the master apparatus.

9. The method according to claim 1 ,

wherein a structure of a bendable portion of the master apparatus is substantially the same as a structure of a bendable portion of the slave apparatus.

10. The method according to claim 9 ,

wherein the initial position is configured that the bendable portion of the master apparatus is not bending.

11. The medical system according to claim 7 ,

wherein a structure of a bendable portion of the master apparatus is substantially same as a structure of a bendable portion of the slave apparatus.

12. The medical system according to claim 11 ,

wherein the initial position is configured that the bendable portion of the master apparatus is not bending.

13. The medical system according to claim 7 ,

wherein the ordinary actuation mode configured to:

detect a bending direction of the mast apparatus;

calculate a command value of the slave apparatus such that a bending direction of the slave apparatus becomes similar to the bending direction of the master apparatus;

enter the command value in the slave apparatus so as to actuate the slave apparatus; and

wherein the reversal actuation mode configured to:

detect the bending direction of the master apparatus;

calculate the command value of the slave apparatus such that the bending direction of the slave apparatus becomes similar to the bending direction of the master apparatus;

correct the command value by reversing the sign of the command value; and

enter the command value in the slave apparatus so as to actuate the slave apparatus.