一枚の画像から血管内デバイスの全体形状と接触力分布を推定する方法

抄録

It is often reported that endovascular treatment may damage blood vessels due to the difficulty of manipulating the device. As for the rotation operation of the device, it is found that the distribution of the contact force between the device and the blood vessel wall is one of the factors that make the rotation operation difficult. In order to investigate the contact force distribution of a device inserted into a blood vessel, in this study, we proposed the method to estimate the overall shape and contact force distribution of a device from a single image. the 3D shape was calculated under the condition that the strain energy of the device inserted in the blood vessel was minimized. When the device node moves to the outside of the vessel wall, the movement is obstructed by the vessel wall. Then, the node and the vessel wall are judged to be in contact. The contact force can be calculated as the constraint force that satisfied the constraint described above. The estimated 3D shape of the device obtained the same accuracy as the previous research. The Hausdorff distance was 0.24 mm. Regarding the contact force distribution, the contact force error was 4.24 N. In order to increase the estimation accuracy of the contact force distribution, it was found that the method needs to be improved. Estimating the contact force distribution accurately will contribute to expect the degree of the potential difficulty in rotating operation of a device. This proposed technique will leads to reduce the probability of accidents in intravascular operation.