Puncture support device

Abstract

A puncture support device includes a display unit, a puncture target setting unit, a puncturable region setting unit, a puncture route extraction unit, a safety degree calculation unit, and an insertion point candidate region display control unit. The puncture target setting unit is configured to set a puncture target in a acquired volume data. The puncturable region setting unit is configured to set a puncturable region on a body surface image. The puncture route extraction unit is configured to extract a puncture route from the set puncturable region on the body surface image to the puncture target. The safety degree calculation unit is configured to calculate a safety degree of the extracted puncture route. The insertion point candidate region display control unit is configured to divide the puncturable region into groups based on the calculated safety degree, and display the divided region on the display unit.

What is claimed is: 
     
         1 . A puncture support device comprising:
 a display unit;   a volume data acquisition unit configured to acquire three-dimensional volume data;   a puncture target setting unit configured to set a puncture target in the acquired volume data;   a puncturable region setting unit configured to set a puncturable region on a body surface image extending from the body surface to the set puncture target in the acquired volume data;   a puncture route extraction unit configured to extract a puncture route from the set puncturable region on the body surface image to the puncture target;   a safety degree calculation unit configured to calculate a safety degree of the extracted puncture route; and   a insertion point candidate region display control unit configured to divide the puncturable region into groups based on the calculated safety degree, set a candidate region of a puncture insertion point for puncturing the puncture target in a puncturable region belonging to a predetermined group, and display the candidate region on the display unit.   
     
     
         2 . The puncture support device according to  claim 1 , wherein the puncturable region setting unit sets a puncturable region on the body surface image from a puncture needle reachable range with a puncturable depth of a puncture needle to be used being a radius around the set puncture target in the acquired volume data. 
     
     
         3 . The puncture support device according to  claim 2 , further comprising a protection target setting unit configured to set a protection target indicating a region to be protected to a region in the puncture needle reachable range,
 wherein, with the protection target being set in the region in the puncture needle reachable range, the puncture route extraction unit extracts the puncture route from the puncturable region on the body surface image to the puncture target based on a region in a first puncture needle reachable range with the protection target being removed from the region in the puncture needle reachable range, and   the safety degree calculation unit calculates a safety degree of the extracted puncture route.   
     
     
         4 . The puncture support device according to  claim 2 , further comprising a non-puncturable region setting unit configured to set a non-puncturable region indicating a region in which puncture cannot be performed to a region in the puncture needle reachable range,
 wherein, with the non-puncturable region being set in the region in the puncture needle reachable range, the puncture route extraction unit extracts a puncture route from the puncturable region on the body surface image to the puncture target based on a region in a second puncture needle reachable range with the non-puncturable region being removed from the region in the puncture needle reachable range, and   the safety degree calculation unit calculates a safety degree of the extracted puncture route.   
     
     
         5 . The puncture support device according to  claim 2 , wherein the safety degree calculation unit calculates the safety degree based on a positional relationship between a puncture route and the protection target, the puncture route connecting the set puncturable region on the body surface image to the puncture target. 
     
     
         6 . The puncture support device according to  claim 1 , wherein the insertion point candidate region display control unit displays a candidate region of the puncture insertion point based on at least either an area of the puncturable region and a distance of the puncture route with a center of gravity of the puncturable region belonging to the predetermined group being the puncture insertion point. 
     
     
         7 . The puncture support device according to  claim 1 , wherein the safety degree calculation unit calculates the safety degree based on a distance between the puncture route and the protection target. 
     
     
         8 . The puncture support device according to  claim 1 , further comprising virtual puncture accepting unit configured to accept an input of a virtual puncture insertion point for virtual puncture in the candidate region of the displayed puncture insertion point,
 wherein when the insertion point candidate region display control unit accepts the input of the virtual puncture insertion point, the insertion point candidate region display control unit displays puncture support information associated with the virtual puncture insertion point on the display unit.   
     
     
         9 . The puncture support device according to  claim 1 , further comprising a projection device that projects, on a subject, the puncturable region on the body surface image,
 wherein the insertion point candidate region display control unit uses the projection device to project the candidate region of the puncture insertion point on the body surface of the subject.