Efficacy of RUS GA Surgical Navigation for Robot-assisted Distal Gastrectomy in Gastric Cancer Patients

Inclusion Criteria: 1. Individuals diagnosed with gastric cancer and scheduled for robot-assisted gastrectomy. 2. Adults aged 20 and above who are capable of independent judgment. 3. Individuals capable of undergoing CT imaging according to the prescribed protocol. 4. Individuals who, before participating in the clinical trial, undergo an interview in a separate place, understand sufficient explanation of the purpose and content of the trial, and voluntarily sign informed consent form (approved by the Institutional Review Board) Exclusion Criteria: 1. Vulnerable individuals (those lacking decision-making capacity, illiterate individuals, pregnant women, newborns, minors under the age of 20, etc.). 2. Patients who cannot undergo CT imaging according to the prescribed protocol before gastric cancer surgery (due to contrast agent allergies, creatinine levels exceeding 1.5 times the normal upper limit, claustrophobia, etc.). 3. Individuals whose major gastric or intra-abdominal arterial/venous structures have been altered due to previous gastric or other abdominal surgeries (however, those with a history of intra-abdominal surgery that did not affect the stomach or major blood vessels are eligible). 4. Patients with a history of residual gastric cancer from previous surgery. 5. Patients who do not consent to participate in the study or withdraw their consent. 6. Patients scheduled for simultaneous resection of other organs besides the stomach.