1.Comparison between 320-slice spiral computed tomography and coronary angiography for diagnosing coronary artery disease
MIRIGULI ; HAIRENISHA ; Liang-zhen TU ;
Chinese Journal of cardiovascular Rehabilitation Medicine 2012;21(4):425-428
Objective: To study clinical application value of 320-slice spiral computed tomography (SCTCA) for diagnosing coronary artery disease. Methods: A total of 85 patients underwent 320-slice spiral CT and selective coronary angiography (CAG). With CAG as gold standard for diagnosing coronary heart disease (CHD), sensitivity, specificity, positive predictive value, negative predictive value and accuracy were compared between 320- SCTCA and CAG. Results: Sensitivity was 95.65%, specificity was 74.36%, positive predictive value was 81.48%, negative predictive value was 93.55% and accuracy was 85.9% diagnosing coronary artery disease by 320-slice spiral CT. Conclusion: 320-slice spiral computed tomography is a simple, safe, reliable non-invasive measurement, may be used for screening coronary heart disease and reviewing after operation.
2.The study effects of the material of buildup cap to the measured value of output factor
Zhen TANG ; Qingsong TU ; Zhongyu LIU
Chinese Journal of Medical Physics 2001;18(1):1,4-
To study the effects of the material of a buildup cap to the determined value of Output FactorSc.Material and MethodsUsing two buildup caps made of plastic A-150 and copper respectively.The ionizing values of ionization chamber were measured with Farmer 2570 electrometer in the fields of all kinds of sizes respectively and calibrated to reference field.Two groups of values of Sc were obtained and compared. Results The ionizing values measured with the buildup cap of copper is evidently larger than with the buildup cap of plastic A-150 and the maximum is 14% but the difference between two groups of the values of Sc is not much evident and all is in the range of 1%. Conclusions Though the material of high density is not equivalent with airthe effects of that to the measured value of Sc is less.So using the buildup cap made of the material of high density for the measurement of Sc is also a quite good method specially in the fields of the small sizes.
3.Changes of T-lymphocyte function subsets and IL-4 and IFN-γ after irradiation injury
Hui ZHENG ; Rong ZHEN ; Xumin TU ; Zhixing ZHANG
Chinese Journal of Radiological Medicine and Protection 2009;29(4):386-388
Objective To observe the effects of T-lymphocyte function subsets,IL-4 and IFN-γ cell factor in different dose and stage after irradiation.Methoda The C57BL/6j mice were divided into shammed irradiation group and model groups.The radiation hurt model was induced by 60Co gamma rays(0.7,1.4,2.8 and 5.6 Gy).The changes of T-lymphocyte subsets CD3,CD4,CD8,IL-4 and IFN-γ in spleen cells were analyzed by flow cytometry in acute injury stage and recovery stage after irradiation.Results The lymphocyte subsets CD3 +,CD4+ and CD8 + decreased after irradiation,which were related to the irradiation dose.At 1 day after irradiation,the decreasing level of IFN-γ was higher than that of IL-4.When irradiation dose was over 2.8 Gy,IL-4 / IFN-γ showed a markedly increased compared with control group.At 25 days after irradiation,CD3 +,CD4+,CD8 +,CD4 +/CD8 +,IL-4 and IFN-γ recovered obviously,but they did not recover to the normal level of shammed irradiation group.Conclusions The depression of mouse immune function induced by γ-irradiation might be caused by changes of CD3,CD4,CD8 and CD4/CD8 ratio,especially the imbalance of IL4 and IFN-γ.
4.Effects of angle and accumulative irradiation on ability of antioxidation and the antioxidase activity on rats
Hui ZHENG ; Xumin TU ; Rang ZHEN ; Zhixing ZHANG
Chinese Journal of Radiological Medicine and Protection 2009;29(1):41-43
Objective To compare the changes in nitric oxide (NO), total ability of anti-oxidize antioxidase, superoxide dismutase (SOD), glutathion peroxidase (GSH-PX), catalase (CAT) and maleic dialdehyde(MDA) in rats after single and accumulative 60Co γ-irradiation . Methods 48 rats were randomly divided into two groups of single and accumulative irradiation. Each group was irradiated by 60Co gamma-rays. The total irradiation doses were 0.4, 0.8, 1.6, 3.2 and 6.4 Gy, respectively in each group. The NO, total ability of anti-oxidize antioxidaze, SOD, GSH-PX, CAT and MDA in serum were measured at day 1 after last irradiation. Results Compared with the single irradiation group, the NO (52.6-117.9 μmol/ml), total ability of anti-oxidize antioxidaze (3.3-26.2 U/ml), the antioxidase activity of the SOD (26.3-167.5 U/ml), GSH-PX (740.8-2462.4 U/ml), CAT (3.3-29.4 U/ml) and the content of MDA(29.3-155.1 nmol/ml) of mt serum in accumulative irradiation group were increased after irradiation, which was related with the accumulative irradiation dose. For instance, total ability of anti-oxidize antioxidase (26.2 U/ml), antioxidase activity of the SOD (167.5 U/ml) and CAT (29.4 U/ml) in 0.4 Gy group of accumulative irradiation were significandy increased when compared with those of control group. However, the content of MDA in accumulative irradiation group was obviously higher than that in single radiation group when the irradiation doses delivered over 3.2 Gy, which might be correlated with higher antioxidase activity. Conclusions Low dose of accumulative gamma-rays irradiation can induce the stimulative effect of antioxidase activity. However, higher dose of accumulative gamma-rays irradiation can damage the activity of antioxidase.
9.From head and neck surgery to head and neck oncology: the disciplinary guarantee for comprehensive cancer therapy.
Gui-yi TU ; Zhen-gang XU ; Shao-yan LIU
Chinese Journal of Oncology 2009;31(11):877-879
Combined Modality Therapy
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Head and Neck Neoplasms
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drug therapy
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pathology
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radiotherapy
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surgery
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Humans
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Hypopharyngeal Neoplasms
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radiotherapy
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surgery
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Medical Oncology
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education
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Nasopharyngeal Neoplasms
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radiotherapy
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surgery
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Neoplasm Staging
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Otorhinolaryngologic Surgical Procedures
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education
10.Pros and cons of total thyroidectomy.
Zhen-gang XU ; Shao-yan LIU ; Gui-yi TU
Chinese Journal of Oncology 2011;33(7):554-555