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小辐射剂量CT脑灌注成像在急性脑梗死患者治疗中的应用
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作者 崔玲 《医疗装备》 2018年第1期136-137,共2页
目的分析小辐射剂量CT脑灌注成像在急性脑梗死患者治疗中的应用效果。方法选择103例急性脑梗死患者作为研究对象,分为试验组和对照组。试验组51例,采用小辐射剂量CT脑灌注成像检查;对照组52例,采用常规辐射剂量CT脑灌注成像检查。结果... 目的分析小辐射剂量CT脑灌注成像在急性脑梗死患者治疗中的应用效果。方法选择103例急性脑梗死患者作为研究对象,分为试验组和对照组。试验组51例,采用小辐射剂量CT脑灌注成像检查;对照组52例,采用常规辐射剂量CT脑灌注成像检查。结果两组病灶中心脑血流量、脑血容量、通过时间和峰值时间比较,差异无统计学意义(P>0.05)。结论小辐射剂量CT脑灌注成像在急性脑梗死患者治疗中的应用效果与常规辐射剂量无异。但是小辐射剂量CT脑灌注成像辐射小。 展开更多
关键词 小辐射剂量 CT脑灌注成像 急性脑梗死
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Modulation of MMP-2 and TIMP-2 by low dose radiation in mice bearing S180 sarcoma 被引量:1
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作者 Xiangmin Jia Hongsheng Yu 《Oncology and Translational Medicine》 2016年第2期127-131,共5页
Objective To investigate the inhibition of low dose radiation (LDR) on S180 sarcomas and its modulation of MMP-2 and TIMP-2 in mice. Methods $180 subcutaneously implanted tumor model mice were randomly divided into ... Objective To investigate the inhibition of low dose radiation (LDR) on S180 sarcomas and its modulation of MMP-2 and TIMP-2 in mice. Methods $180 subcutaneously implanted tumor model mice were randomly divided into two groups: control (N) and low dose radiation (LDR) groups. N mice were sacrificed after 12 h, whereas LDR mice were sacrificed after 12 (LDR-12 h), 24 (LDR-24 h), 48 (LDR-48 h), and 72 (LDR-72 h) h. Thereafter, we measured the tumor volumes. Histopathology was performed, and P-V immunohistochemistry was applied to assess MMP-2 and TIMP-2 expression. Results Compared with the control group, the tumor growth was significantly inhibited in the LDR groups (P 〈 0.05). MMP-2 expression was considerably reduced in LDR-24h (P 〈 0.05) and LDR-48h (P 〈 0.05), whereas the change of TIMP-2 was not obvious in the LDR groups (P 〉 0.05) in contrast to that of the control group. Conclusion LDR can effectively suppress the growth of S180 implanted tumors by reducing MMP-2, which is associated with invasion and metastasis. 展开更多
关键词 MMP-2 TIMP-2 low dose radiation S180 sarcoma 1
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The Influence of Diode and He-Ne Lasers on Corn and Wheat Seeds
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作者 Milesa Sreckovic Relja Vasic +2 位作者 Milan Dukic Sanja Jevtic Predrag Jovanic 《Journal of Agricultural Science and Technology(B)》 2014年第3期165-175,共11页
The paper presents a study on the effects of low intensity laser irradiation on morphological changes in plants sprouted from maize hybrid seeds (two hybrids) and wheat seeds. Pre-sowing laser irradiation treatment ... The paper presents a study on the effects of low intensity laser irradiation on morphological changes in plants sprouted from maize hybrid seeds (two hybrids) and wheat seeds. Pre-sowing laser irradiation treatment on the seeds was done, intervals from 10 s to 15 min (approximately), by using a diode laser output power of 12 mW at 904 nm wavelength or with He-Ne laser with output power of 50 mW and 632.8 nm wavelength. Before irradiation seeds were divided into groups (wet and dry, and then in subgroups-irradiated or control groups). We used maize hybrids, Amilacea and Identata and wheat (Triticum aestivum). The reflection coefficient in visible range was done for maize varieties. Obtained data show the influence of laser beam to better plant growth. Better results are obtained for dry seed irradiation than for wet. In order to investigate the effect of laser beam and in general to clarify a lot of unsolved photo processes related to bioorganisms at macroscopic and microscopic levels, some optical constants of selected plant families were researched. At the same time, the influence of laser beams of common wavelengths to the selected plants was monitored. Morphological processes of plants (seeds and leaves) irradiated under different conditions and plant growing dynamics were contemplated. The definite correlation analyses of obtained results were made, clearly speaking about the influence of small-dose radiation to characteristics (quantitative and other genetic, bio-stimulating effects) of future plant growth. 展开更多
关键词 He-Ne laser GaAs diode laser SEED IRRADIATION reflection coefficient MAIZE wheat.
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