1. Department of Radiation Physics, Qingdao Central Hospital, Qingdao Shandong 266042, China丨
2. Department of Radiotherapy, The First Medical Center of Chinese PLA General Hospital, Beijing 100853, China丨
3. Oncology Treatment Center, 960 Hospital of PLA, Zibo Shandong 255300, China
Abstract：Objective The application of domestic and imported precision radiotherapy equipment in primary hepatocellular
carcinoma and pancreatic cancer was compared to evaluate the operation of domestic precision radiotherapy equipment.
Methods A total of 60 patients with primary hepatocellular carcinoma (divided into small and large hepatocellular carcinoma),
and pancreatic cancer were selected retrospectively. IMRT plans were designed for selected cases. All plans were divided into
domestic and imported groups. The planed dosimetry parameters and dose verification results were evaluated. Results The targets
and organ at risk (OAR) of all research plans could meet the limited requirements. The homogeneity index (HI) of patients with
primary hepatocellular carcinoma the domestic group was better than the imported group (P<0.05). There was no statistically
significant difference in conformal index (CI) between all the groups (P>0.05). There was no statistical difference between the V10
and V30 of liver in the domestic group compared with the imported group (P>0.05). For the primary hepatocellular carcinoma plans,
imported group liver Dmean was significantly lower than the domestic group (P<0.05). The spinal cord Dmax of small hepatocellular
carcinoma in domestic group was significantly lower than that in imported group (P<0.05). All dose verification results could meet
the clinical requirements. Conclusion Compared with the imported equipment, the domestic equipment can complete the design and
implementation of the conventional IMRT plan. the plan quality and dose verification results are in good agreement with the imported
equipment. Domestic radiotherapy equipment can basically meet the clinical needs.
