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“聚龙一号”丝阵实验轴向一维X光辐射功率分布 被引量:1
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作者 黄展常 杨建伦 +6 位作者 徐荣昆 李正宏 蒋树庆 叶繁 胡青元 甯家敏 许泽平 《强激光与粒子束》 EI CAS CSCD 北大核心 2016年第12期9-13,共5页
通过一维条纹相机诊断系统对"聚龙一号"(JL-Ⅰ)四类单层丝阵负载进行了轴向X光辐射测量。由于瑞利-泰勒不稳定性的影响,大部分负载表现出两端发光比中间滞后、阳极端发光比阴极端滞后、阳极端发光总强度弱于阴极端的现象。通... 通过一维条纹相机诊断系统对"聚龙一号"(JL-Ⅰ)四类单层丝阵负载进行了轴向X光辐射测量。由于瑞利-泰勒不稳定性的影响,大部分负载表现出两端发光比中间滞后、阳极端发光比阴极端滞后、阳极端发光总强度弱于阴极端的现象。通过不同类型丝阵对比,对于20mm直径的丝阵,JL-Ⅰ驱动器的匹配负载线质量在0.9mg/cm附近。轴向辐射同步性与辐射功率之间存在相关性。 展开更多
关键词 Z箍缩 一维条纹像 丝阵X光辐射 轴向同步性
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APPLICATION VALUE OF MAGNETIC RESONANCE SEQUENCES IN DIAGNOSIS OF EARLY SPINAL METASTATIC TUMOR 被引量:1
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作者 Li-xia Wang Xiang-quan Kong He-shui Shi Ding-xi Liu Yin Xiong 《Chinese Medical Sciences Journal》 CAS CSCD 2007年第1期9-12,共4页
Objective To investigate the clinical value of different magnetic resonance (MR) pulse sequences in diagnosis of spinal metastatic tumor. Methods Fifteen patients with clinically suspected spinal metastatic tumor were... Objective To investigate the clinical value of different magnetic resonance (MR) pulse sequences in diagnosis of spinal metastatic tumor. Methods Fifteen patients with clinically suspected spinal metastatic tumor were included in this study. These patients were with documented primary tumors. Four MR pulse sequences, T1-weighted spin echo (T1WI SE), T2-weighted fast spin echo (T2WI FSE), short time inversion recovery (STIR), and gradient echo 2-D multi echo data imaging combination (GE Me-2D) were used to detect spinal metastasis. Results Fifteen vertebral bodies were entire involvement, 38 vertebral bodies were section involvement, and totally 53 vertebral bodies were involved. There were 19 focal infections in pedicle of vertebral arch, 15 metastases in spinous process and transverse process. Fifty-three vertebral bodies were abnormal in T1WI SE and GE Me-2D, 35 vertebral bodies were found abnormal in T2WI FSE, and 50 vertebral bodies were found abnormal in STIR. The verges of focal signal of involved vertebral bodies were comparatively clear in T1WI SE, comparatively clear or vague in T2WI FSE, vague in STIR, and clear in GE Me-2D.Conclusions GE Me-2D may be the most sensitive technique to detect metastases. So three sequences (T1WI SE, T2WI FSE, GE Me-2D) can demonstrate the early changes of spinal metastasis roundly. 展开更多
关键词 spinal metastatic tumor T1-weighted spin echo T2-weighted fast spin echo gradient echo 2-d multi echo data imaging combination
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