The dosimetric study of radiotherapy after modified radical mastectomy for left breast cancer using the beam’s eye view in intensity-modulated radiation therapy / 中国辐射卫生

Objective To analyze the dosimetric features of chest wall radiotherapy after modified radical mastectomy for left breast cancer using the beam’s eye view (BEV) in intensity-modulated radiation therapy (B-IMRT). Methods A total of 13 patients treated with modified radical mastectomy for left breast cancer in the Liaocheng People’s Hospital from May 2020 to November 2020 were recruited. They were treated with postoperative radiotherapy using the plans of B-IMRT or tangential fields in intensity-modulated radiation therapy (T-IMRT). The mean dose, conformity index and homogeneity index of the target field, and dose volume parameters of left lung and heart were compared between two groups. Results Compared with those of T-IMRT group, B-IMRT significantly improved the conformity and homogeneity of the target field (P < 0.05), and their mean dose of target field was similar. In addition, V5, V10, V20, V30 and Dmean of the left-side lung, and V5, V10, V30 and Dmean of the heart in B-IMRT group were significantly reduced compared with those of T-IMRT group (P < 0.05). In comparison to those of T-IMRT, B-IMRT decreases V5, V10, V20, V30 and Dmean of the left-side lung by 9.23%, 13.29%, 9.54%, 8.28% and 10.35%, respectively, which decreases V5, V10, V30 and Dmean of the heart by 27.62%, 29.72%, 21.45% and 24.88%, respectively. Conclusion Compared with T-IMRT planning, B-IMRT presents dosimetric advantages in the conformity and homogeneity of the target field in the postoperative radiotherapy of patients treated with modified radical mastectomy for left breast cancer, especially in reducing the radiation dose and volume of the heart and lungs.

CT Diagnosis of Hepatocellular Adenoma / 实用放射学杂志

Objective To investigate the CT manifestations of hepatocellular adenoma,and improve the CT diagnostic accuracy of the disease.Methods CT manifestations of 10 cases with hepatocellular adenoma proved by pathology were analyzed retrospectively.Results On plain CT scan,the lesions were isodensity or slight hypodensity in 10 cases,which was hardly distinguished from the normal tissue.In all 10 cases,the lesions showed marked enhancement in the arterial phase.the mean CT value of hepatocellular adenoma in the arterial phase was much higher than that in portal venous and delay phase.Conclusion CT scan is helpful for the diagnosis of hepatocellular adenoma.