Abstract: A surgery assistance device includes a true lumen information acquisition unit that acquires three dimensional position information of a true lumen existing in a target blood vessel, a true lumen image generation unit that acquires an angiographic image of the target blood vessel from a flat panel detector (FPD) arranged at a first imaging position and generates a true lumen image representing the true lumen at a position and in a posture corresponding to the angiographic image by using position information of the first imaging position and three dimensional position information of the true lumen, and an image composition unit that generates a composite image by compositing the angiographic image and the true lumen image and outputs the composite image.

Abstract: A plasma guide wire includes a conductive core shaft configured to be connected to a high-frequency generator, a conductive coil body that surrounds a part of the core shaft on a distal end side of the core shaft, and a distal tip that includes a conductive material and fixes a distal end of the core shaft and a distal end of the coil body, the distal tip being configured to receive a high frequency wave from the high-frequency generator via the core shaft. An outer surface of the distal tip includes (i) a proximal end side region located on a side of the coil body and (ii) a distal end side region located distally relative to the proximal end side region. The distal end side region has an electric resistance value that is lower than an electric resistance value of the proximal end side region.

Abstract: A plasma ablation system includes a plasma guide wire having a conductive first electrode formed on a distal end portion, a catheter having a conductive second electrode formed on a distal end side and a lumen through which the plasma guide wire is inserted, and a radio frequency (RF) generator electrically connected to each of the plasma guide wire and the catheter to output a high frequency electric power to the first electrode and the second electrode. The plasma guide wire can ablate a living body tissue by discharge between the first electrode and the second electrode, and the RF generator outputs the high frequency electric power that is 50 W or higher and 100 W or lower during discharge and pulse-modulated to have a duty ratio of 7.4% or higher and 40.0% or lower.