Multi-window Dynamic Combination Diagnosis and Treatment Method to Improve the Accuracy of Lung Stereotactic Radiotherapy
Objective Study the ability of different window levels to delineate the true range of tumors to find the optimal combination of window levels.Methods three metrics(target tumor deflectable space,target tumor volume consistency,target tumor image confidence)were proposed to evaluate the MVCT images of 115 patients with lung stereotactic radiosurgery.Results For tumors where the rim halo sign is present,adjusting the window levels can obtain a more realistic range of the target tumor,and the window levels value reaches-612HU with the best effect.For lesions with a single edge with a clear edge of local density change,the image guidance accuracy brought by the adjustment of window levels is not significantly improved.For lesions with peritumoral diffuse inflammation,window levels adjustment is not applicable and cannot improve image guidance accuracy.Conclusion Multi-window dynamic combination can obtain a more realistic tumor range,which is helpful to reduce image guidance error and improve the accuracy of lung stereotactic radiotherapy.
万方数据
维普
