共查询到20条相似文献，搜索用时 62 毫秒
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在日常工作中软骨损伤较为常见，有时易漏诊，处理不当容易造成关节部位畸形，功能障碍，为了提高认识现对38例病例分析如下； 相似文献
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目的：探讨下肺结核的X线表现,旨在提高正确诊断率。方法：对21例经临床证实为下肺野结核的X线平片资料进行回顾性分析。结果：下肺野结核的X线平片表现为：17例表现为小片状或絮状致密影,边缘模糊;2例表现为大片状致密影,示有虫蚀样空洞;2例表现为薄壁空洞,周边示有斑点状、片状、索条状影即所谓卫星病灶。结论：胸部X线平片对下肺野结核的诊断,必须密切结合临床及实验室检查。 相似文献
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Nivethan Velauthapillai Joe Barfett Hussein Jaffer David Mikulis Kieran Murphy 《Journal of vascular and interventional radiology : JVIR》2017,28(3):406-411
Purpose
To evaluate efficacy of oral antioxidant treatment given to patients before radiologic procedures in reducing x-ray-induced DNA damage.Materials and Methods
In a single-center prospective controlled trial, antioxidant treatment with 2 g ascorbate, 1.2 g N-acetylcysteine, 600 mg lipoic acid, and 30 mg beta carotene was given to 5 consecutive participants before undergoing clinically indicated technetium-99m methylene diphosphonate (99mTc MDP) bone scans for cancer staging. These participants were compared with 5 participants without antioxidant treatment. DNA damage was visualized in peripheral blood mononuclear cells (PBMCs) before and after bone scans using three-dimensional microscopy and fluorescently labeled gamma-H2AX protein. Wilcoxon rank sum test was used to determine whether there was a statistically significant difference in the radiation received between the control and antioxidant groups, the number of foci/cell before and after bone scan within groups, and foci/cell after bone scan between groups.Results
There was a significantly higher number of gamma-H2AX foci/cell after ionization radiation in the control group compared with the antioxidant group (P = .009). There was no statistically significant difference in number of gamma-H2AX foci/cell before or after exposure in the antioxidant group; the number of gamma-H2AX foci/cell was statistically significantly higher (P = .009) in the control group after exposure to 99mTc MDP.Conclusions
In patients undergoing 99mTc MDP bone scans, treatment with oral antioxidants before scanning significantly prevented DNA damage in PBMCs. Antioxidants may provide an effective means to protect patients and health care professionals from radiation-induced DNA damage during imaging studies. 相似文献14.
本文报道105咧123个部位,包括急性放射性皮炎10例,慢性放射性皮炎52例,严重溃疡38例及恶变5例的有关皮肤放射性损伤的分析。就这些病例对放射性皮肤损伤的病理、临床表现、诊断 及治疗,尤其对局部手术的有关方而作了较详细阐述和讨论,最后提出了防护意见。 相似文献
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医用诊断X线机的管头组装体漏射线,有用线束进入被检者皮肤处的空气照射率和立卧位透视防护区测试平面上空气照射率是X线机防护性能的三项主要指标。本文根据《医用诊断X线卫生防护规定》要求的原则,整理出X线机三项主要防护性能的实用测试方法,并报道实测例子,同时提出了对漏射线指标区分x线机出厂防护捡验和使累单位防护监测的看法。 相似文献
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《Journal of the American College of Radiology》2015,12(1):82-89
PurposeThe purpose of this prospective study was to investigate absolute radiation exposure values and factors that influence radiation exposure of interventionists during CT-guided interventions (CTGIs). To our knowledge, no data exist regarding the radiation dose to which the interventionist is exposed during these procedures.MethodsAbsolute radiation dose values from a total of 131 CTGIs were analyzed. Radiation dose values were collected by thermoluminescent dosimeters that were positioned above the lead protection being worn, on the forehead, thyroid, chest, gonads, and right and left hand and foot.The radiation doses were analyzed with respect to the experience level of the person performing the procedure, the degree of difficulty measured on a 4-point Likert scale, the lesion size measured on a 3-point Likert scale, and the CT system used.ResultsMedian whole-body dose was 12 μSv. With the exception of the forehead, all whole-body radiation doses were statistically significantly lower in CTGIs performed using the modern dual-source CT system compared with the 16-slice multi-detector CT. For CTGIs rated as more complex, the radiation exposure of the radiologist performing the procedure was statistically significantly higher, with the exception of the left hand. A statistically significantly lower median whole-body dose was measured for inexperienced compared with experienced radiologists. However, a few dose measurements of more than 1 mSv were found at the right hand.ConclusionsRadiation exposure measured during CTGIs is low (<50 μSv). Because the radiation dose was higher in more-complex interventions and for 16-slice multi-detector row CT, inexperienced radiologists should focus on less-complex procedures. 相似文献