Application of mixed reality technique in hepatobiliary tumor surgery / 中国介入影像与治疗学

ABSTRACT

Objective: To explore the application value of mixed reality technology in surgical treatment of hepatobiliary tumors. Methods: Sixteen patients with hepatobiliary tumors (study group) underwent CT plain and enhanced examination or routine MR examination of abdomen. The original data of DICOM format with layer thickness ≤1.5 mm were obtained. Then the data were imported into the computer, and 3D model reconstruction was performed using Mimics software. The calculated STL format files were imported into zSpace, and the mixed reality technology was used to process the display. The virtual model was used to for discussion of surgical planning, rehearsal operation process and intraoperative real-time navigation. Meanwhile, 31 patients with hepatobiliary tumors were enrolled in control group and underwent traditional surgical treatments. The average operative time and the mean intraoperative blood loss were compared between the two groups. Results: By constructing 3D model of CT or MR scan image data, the relative positional relationship of tissue and organs were distinguished. The lesions' site could be delineated by Mimics software, and the lesions' size were clearly measured with rendering. The mixed reality navigation system could guide the surgical procedure, accurately provide the location of lesion, show the relative relationship of surgical instruments and the lesion. The average operation time of study group and control group was (296.25±65.37)min and (391.45±79.75)min (t=2.280, P=0.029), and the mean intraoperative blood loss was (318.75±99.20)ml and (560.32±227.53)ml (t=2.080, P=0.046), respectively. Conclusion: Mixed reality technology can provide the surgeon with a very intuitive stereo image, help to clarify the surgical path and enhance the judgment of the surgeon, therefore having good application prospect in hepatobiliary tumor surgery.