Objective: The purpose of this work is to examine the usefulness of the topological approach for analysis of current density maps during ST-T interval in detection of coronary artery disease (CAD) in patients with pro...Objective: The purpose of this work is to examine the usefulness of the topological approach for analysis of current density maps during ST-T interval in detection of coronary artery disease (CAD) in patients with proved CAD but normal results of routine tests. Materials and Methods: The patient group included 123 patients. Coronary angiography was done due to chest pain. The control group consisted of 124 healthy volunteers. The MCG test was done by 4-channels MCG system installed at unshielded setting. An integral topological index Kideal, consisting of 4 parameters, has been counted. Results and Conclusions: It is shown that Kideal was higher in patient group compared to control one. Sensitivity was 87%, and specificity was 64%. The topological analysis of MCG current density maps is a valuable tool in noninvasive detection of CAD in difficult-to-diagnose patients with uninformative results of routine tests.展开更多
目的:探讨18F-FDGPETCT显像在难确诊性鼻咽癌中的临床应用价值。方法:回顾性分析2020年3月-2021年2月我院临床高度怀疑鼻咽癌的60例患者,首次或多次行鼻咽镜病理活检阴性,行常规18F-FDGPET/CT检查,根据PET/CT结果引导再次行鼻咽镜病理...目的:探讨18F-FDGPETCT显像在难确诊性鼻咽癌中的临床应用价值。方法:回顾性分析2020年3月-2021年2月我院临床高度怀疑鼻咽癌的60例患者,首次或多次行鼻咽镜病理活检阴性,行常规18F-FDGPET/CT检查,根据PET/CT结果引导再次行鼻咽镜病理活检。将上述患者分为两组,以最终病理结果为金标准,分为阳性组(鼻咽癌组)及阴性组(非鼻咽癌组)。收集临床资料,包括年龄、性别、家族史、EB病毒相关抗体及病理等。分析难确诊性鼻咽癌原发灶中PET/CT的临床应用价值、影像学特征、鼻咽癌淋巴结转移情况。结果:PET/CT鼻咽癌原发灶在左侧壁12例(33.33%)、右侧壁16例(44.44%)、顶后壁+双侧壁8例(22.22%)、平均大小(17.68±5.63)cm^(3)、平均最大标准化摄取值(the maximum standardized uptake value,SUVmax)为(8.36±0.77)。PET/CT诊断难确诊性鼻咽癌的准确率为73%(44/60);阳性预测值为100%(36/36),阴性预测值为33%(8/24)。结合病灶的部位再进行诊断(单侧为恶性,双侧为良性),准确率提高到约为80%(48/60),阴性预测值提高到20/24(83.3%)。大部分炎症病灶一般表现为双侧鼻咽部对称性FDG摄取增高;恶性者大部分表现为单侧病灶,除非病灶范围较大形成肿物,则可能累及双侧。两组间的EB病毒相关抗体、SUVmax差异具有统计学意义(P<0.05)。病理类型中低分化鳞癌与高分化鳞癌的SUVmax值差异有统计学意义(P<0.05),前者高于后者。鼻咽癌淋巴结转移率高达69.81,数量平均(4.68±1.63)个,SUVmax在PET/CT图像亦较高。结论:在难确诊性鼻咽癌患者中,18F-FDGPETCT显像的准确率及阳性预测值较高,具有临床应用价值。展开更多
文摘Objective: The purpose of this work is to examine the usefulness of the topological approach for analysis of current density maps during ST-T interval in detection of coronary artery disease (CAD) in patients with proved CAD but normal results of routine tests. Materials and Methods: The patient group included 123 patients. Coronary angiography was done due to chest pain. The control group consisted of 124 healthy volunteers. The MCG test was done by 4-channels MCG system installed at unshielded setting. An integral topological index Kideal, consisting of 4 parameters, has been counted. Results and Conclusions: It is shown that Kideal was higher in patient group compared to control one. Sensitivity was 87%, and specificity was 64%. The topological analysis of MCG current density maps is a valuable tool in noninvasive detection of CAD in difficult-to-diagnose patients with uninformative results of routine tests.
文摘目的:探讨18F-FDGPETCT显像在难确诊性鼻咽癌中的临床应用价值。方法:回顾性分析2020年3月-2021年2月我院临床高度怀疑鼻咽癌的60例患者,首次或多次行鼻咽镜病理活检阴性,行常规18F-FDGPET/CT检查,根据PET/CT结果引导再次行鼻咽镜病理活检。将上述患者分为两组,以最终病理结果为金标准,分为阳性组(鼻咽癌组)及阴性组(非鼻咽癌组)。收集临床资料,包括年龄、性别、家族史、EB病毒相关抗体及病理等。分析难确诊性鼻咽癌原发灶中PET/CT的临床应用价值、影像学特征、鼻咽癌淋巴结转移情况。结果:PET/CT鼻咽癌原发灶在左侧壁12例(33.33%)、右侧壁16例(44.44%)、顶后壁+双侧壁8例(22.22%)、平均大小(17.68±5.63)cm^(3)、平均最大标准化摄取值(the maximum standardized uptake value,SUVmax)为(8.36±0.77)。PET/CT诊断难确诊性鼻咽癌的准确率为73%(44/60);阳性预测值为100%(36/36),阴性预测值为33%(8/24)。结合病灶的部位再进行诊断(单侧为恶性,双侧为良性),准确率提高到约为80%(48/60),阴性预测值提高到20/24(83.3%)。大部分炎症病灶一般表现为双侧鼻咽部对称性FDG摄取增高;恶性者大部分表现为单侧病灶,除非病灶范围较大形成肿物,则可能累及双侧。两组间的EB病毒相关抗体、SUVmax差异具有统计学意义(P<0.05)。病理类型中低分化鳞癌与高分化鳞癌的SUVmax值差异有统计学意义(P<0.05),前者高于后者。鼻咽癌淋巴结转移率高达69.81,数量平均(4.68±1.63)个,SUVmax在PET/CT图像亦较高。结论:在难确诊性鼻咽癌患者中,18F-FDGPETCT显像的准确率及阳性预测值较高,具有临床应用价值。
