目的:探究能谱CT对直肠癌淋巴结转移测定的价值。方法:选取包头医学院第二附属医院行腹腔镜下直肠癌根治术的50例患者,共纳入225枚淋巴结,其中转移性淋巴结51枚,非转移性淋巴结174枚。对比分析转移性淋巴结与非转移性淋巴结的长径、短径、长短径之比,同时对各淋巴结的能谱参数进行对比分析。结果:转移性淋巴结组与非转移性淋巴结组的长径、长短径之比具有统计学意义(P Objective: To explore the value of spectral CT in the determination of lymph node metastasis in rectal cancer. Methods: A total of 225 lymph nodes were included in 50 patients who underwent laparoscopic radical rectal cancer resection in the Second Affiliated Hospital of Baotou Medical College, including 51 metastatic lymph nodes and 174 non-metastatic lymph nodes. The ratios of long diameter, short diameter and long short diameter of metastatic lymph nodes and non-metastatic lymph nodes were compared and analyzed, and the energy spectrum parameters of each lymph node were compared and analyzed. Results: The ratio of length to diameter between metastatic lymph node group and non-metastatic lymph node group was statistically significant (P < 0.05). In arteriovenous phase, IC, NIC and substance were statistically significant compared with Water-Iodine, Iodine-Fe, Fe-Iodine, Iodine-Cu, Cu-Iodine and Blood-Iodine (P < 0.05). Conclusion: Spectral CT has a high differential value in determining whether lymph nodes metastasize in rectal cancer.
目的:研究基于人工智能优化引擎(IOE)的Ethos系统自带的Auto Plan计划:9野静态调强放疗(9F-IMRT)、12野静态调强放疗(12F-IMRT)以及3弧容积旋转调强放疗(3-VMAT)技术在宫颈癌放射治疗中的剂量学差异。方法:随机选取收治的宫颈癌患者20例,进行CT模拟定位,基于瓦里安Ethos系统的Auto Plan自动生成9F-IMRT、12F-IMRT以及3-VMAT计划,比较三种计划的靶区剂量适形度、均匀性和危及器官的剂量学差异,以及机器跳数(MU)。结果:9F-IMRT、12F-IMRT以及3-VMAT计划的靶区剂量均能够满足剂量学要求,12F-IMRT和3-VMAT计划靶区适形度的差异无统计学意义(P>0.05),9F-IMRT计划靶区适形度略差;9F-IMRT、12F-IMRT计划靶区均匀性更优,且与3-VMAT相比差异具有统计学意义(P<0.05)。危及器官保护方面,三种计划在膀胱、直肠、小肠、结肠、股骨头中最大剂量D_(max)具有显著性差异(P<0.05)。3-VMAT计划的MU低于9F-IMRT计划和12F-IMRT计划,差异具有统计学意义(P<0.05)。结论:对于宫颈癌患者,Ethos Auto Plan生成的9F-IMRT、12F-IMRT以及3-VMAT技术均可达到临床靶区剂量和危及器官的保护要求,但9F-IMRT、12F-IMRT计划在靶区均匀性方面优于3-VMAT计划;VMAT计划机器跳数明显低于IMRT计划,表明其治疗更高效。
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