核素

Activation analysis and non-radiometric method have been used to measure long-lived fission product nuclides. Their sensitivity is superior to that of traditional radiochemical analysis.

活化分析以及非放射的仪器分析方法被用来测量长寿命裂变产物核素，其分析灵敏度优于传统的放化分析法。

The radiochemical purity and radiolabeling yield of (superscript 99m)Tc-HYNIC-Annexin V were more than 90%. The stability could last 6 h.

上标 99mTc-HYNIC-Annexin V标记率及放化纯均达到90％以上，稳定性在6h以上，可以满足核素显像的要求。

It is obvious that labeling the ASODN by radioelement is the most pivotal process.

放射性核素标记ASODN是反义显像药物合成的最关键步骤。

The osteoid osteoma was found to have a circular or oval radiolucency which was less than 2 cm in diameter with different degrees of bone sclerosis around the nidus. Of the 9 cases, 5 showed an irregular area with less density on plain X-ray film. CT scanning showed nidus in all cases. MRI showed nidus in 1 case. Radioactive scanning showed radioactive concentration in 4 cases.

骨样骨瘤的影像学表现为一圆形或卵圆形的透亮区，直径cm，其周围有不同程度的骨质硬化。9例X线平片仅5例发现不规则密度减低区，9例CT均清楚显示病灶瘤巢； 1例MRI也观察到类似瘤巢的改变。4例同位素检查均表现为病变区核素浓聚现象。

Methods Retrospective analysis of 123 cases of lung cancer bone metastases of radionuclide bone imaging data were done.

回顾分析123例肺癌骨转移的核素显像资料。

Abstract］ Objective To investigate the clinical significance of radionuclide bone imaging in diagnosis of osteoporosis.

摘要］ 目的探讨核素99mTc－MDP骨显像在骨质疏松症诊断中的应用价值。

Understand the conception of radionuclide imaging and mechanism of accumulation in organ or focus of a disease.

了解核素显像技术的概念及其标记物在脏器或病灶中积聚的主要机制。

Objective To evaluate the clinical value of radionuclide imaging in children with small intestinal bleeding.

目的 探讨放射性核素显像对小儿小肠出血定位及病因诊断的价值。

CTBT Beijing National Data Centre and Radionuclide Laboratory, Beijing 100085, China

禁核试北京国家数据中心和北京放射性核素实验室，北京 100085

The objectives are achieved through test and analysis of the test results on radionuclide migration in unsaturated loess.

通过对核素在非饱和黄土中迁移实验结果的分析，达到了上述目的。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。