Abstract 133P
Background
This study creates an atelectasis model by applying a force in the direction of gravity according to the patient’s surgical posture based on a three-dimensional model for effective tracking of the location of the pulmonary nodule during video-assisted thoracic surgery(VATS).
Methods
After obtaining Contrast-enhanced computed tomography(CT) images from 12 patients with pulmonary nodules. The images are converted into 3d models. Each vector point of the 3d model is relocated in the direction of gravity according to the direction of surgery. The shape of the deformed lung and the nodule's location were compared with the surgical video to evaluate the simulation similarity. To measure the accuracy of the simulation, images from surgical videos were obtained. After selecting a similar location based on the location of the sternum, an image of the same location was obtained in the simulation.
Results
Table: 133P
| Patient Number | Age | Gender | Location | Number of matching | DSC | JSC | HD | Pearson coefficient r |
| 1 | 53 | M | RUL | 12 | 88.10 | 80.63 | 8.86 | 0.78 |
| 2 | 44 | F | LUL | 27 | 93.26 | 92.92 | 2.15 | 0.88 |
| 3 | 57 | M | LUL | 13 | 85.48 | 80.78 | 8.25 | 0.76 |
| 4 | 84 | F | LUL | 9 | 87.78 | 86.89 | 7.62 | 0.79 |
| 5 | 72 | M | RUL | 15 | 93.88 | 92.94 | 2.85 | 0.89 |
| 6 | 57 | M | LLL | 30 | 93.76 | 92.95 | 3.47 | 0.8 |
| 7 | 76 | F | LLL | 16 | 88.06 | 86.82 | 9.92 | 0.71 |
| 8 | 64 | F | RUL | 13 | 93.88 | 92.97 | 2.11 | 0.84 |
| 9 | 46 | F | LUL | 13 | 92.82 | 90.68 | 3.85 | 0.88 |
| 10 | 50 | M | LUL | 20 | 85.23 | 84.39 | 8.24 | 0.83 |
| 11 | 68 | F | RUL | 14 | 93.25 | 92.84 | 2.87 | 0.89 |
| 12 | 53 | F | RLL | 17 | 85.01 | 84.93 | 10.03 | 0.72 |
Conclusions
Through this retrospective study, we developed a system that can predict the position of nodules in thoracoscopic surgery. Also, this research presented a methodology for implementing and verifying the accuracy of the atelectasis simulation developed.
Legal entity responsible for the study
The authors.
Funding
National Research Foundation of Korea.
Disclosure
All authors have declared no conflicts of interest.