品管圈（quality control circle,QCC）是指同一工作现场、工作性质相类似的基层人员,自动自发地进行质量管理活动而组成的团队[1]。由于我科收治的大多是脑卒中患者,均有不同程度的运动、感觉和反射障碍,常出现意识障碍、偏瘫、失语,...品管圈（quality control circle,QCC）是指同一工作现场、工作性质相类似的基层人员,自动自发地进行质量管理活动而组成的团队[1]。由于我科收治的大多是脑卒中患者,均有不同程度的运动、感觉和反射障碍,常出现意识障碍、偏瘫、失语,往往病情重,病程长,后遗症多,护理工作量大,患者家庭经济负担重;所以要通过培养护士良好的服务态度来提升护患沟通水平,并且对患者及家属进行疾病知识宣教、生活护理培训、心理康复、饮食指导，肢体功能锻炼等，提高工作效率，减轻患者痛苦，提高脑卒中患者及家属对健康教育的知晓率，从而提高患者生活质量，缩短住院时间。我科开展品管圈活动，以期提高脑卒中患者及家属健康教育知识的知晓率。展开更多
Non-invasive cardiac-pulmonary gating is proposed to improve the imaging resolution. It produces signals based on the cardiac-pulmonary motion of an animal in real-time. The system with the non-invasive gating consist...Non-invasive cardiac-pulmonary gating is proposed to improve the imaging resolution. It produces signals based on the cardiac-pulmonary motion of an animal in real-time. The system with the non-invasive gating consists of a digital signal processor （DSP）, an electrocardiography （ECG） detection circuit and a thermoeouple circuit. An enhanced R wave detection algorithm based on zero crossing counts is used to adjust the low sample frequency associated with the respiratory rate of an animal. The thermocouple recognizes the respiration phase by sensing the temperature changes of the nasal airflow of an animal. The proposed gating can accurately generate the gating signal for freely breathing mice （weight of around 0.03 kg）, and its respiratory signal is too weak to be detected. Apart from non-invasiveness, compared with other existing gating techniques, it occupies minimal space at lower cost. Actually, it can be used in micro-computed tomography （CT） and other systems needed to detect the cardiac-pulmonary motion. Several tests validate that the proposed cardiac-pulmonary gating can generate the gating signal as required. By using the gating technique, the image resolution is improved.展开更多
为了评估了小动物锥束微型计算机层析图像(micro-CT)中低能X射线散射的大小和对系统成像结果的影响,该文引入了散射率(scatter-to-pri mary ratio,SPR)的概念。采用主射线终止法计算X射线散射率大小,并利用外推拟合法估测直径为0 mm阻...为了评估了小动物锥束微型计算机层析图像(micro-CT)中低能X射线散射的大小和对系统成像结果的影响,该文引入了散射率(scatter-to-pri mary ratio,SPR)的概念。采用主射线终止法计算X射线散射率大小,并利用外推拟合法估测直径为0 mm阻挡物的散射值。用铅板制成的狭缝改变系统成像的锥角大小,讨论了锥束micro-CT中锥角大小与散射率的关系。直径40 mm的均匀树脂模型用来模拟小鼠,当锥角分别为0.247°和5.67°时,X射线散射率分别为4.78%和27.58%。讨论了散射对重建图像均一度和对比度的影响。展开更多
文摘品管圈（quality control circle,QCC）是指同一工作现场、工作性质相类似的基层人员,自动自发地进行质量管理活动而组成的团队[1]。由于我科收治的大多是脑卒中患者,均有不同程度的运动、感觉和反射障碍,常出现意识障碍、偏瘫、失语,往往病情重,病程长,后遗症多,护理工作量大,患者家庭经济负担重;所以要通过培养护士良好的服务态度来提升护患沟通水平,并且对患者及家属进行疾病知识宣教、生活护理培训、心理康复、饮食指导，肢体功能锻炼等，提高工作效率，减轻患者痛苦，提高脑卒中患者及家属对健康教育的知晓率，从而提高患者生活质量，缩短住院时间。我科开展品管圈活动，以期提高脑卒中患者及家属健康教育知识的知晓率。
基金Supported by the National Basic Research Program of China ("973" Program) (2006CB705700)~~
文摘Non-invasive cardiac-pulmonary gating is proposed to improve the imaging resolution. It produces signals based on the cardiac-pulmonary motion of an animal in real-time. The system with the non-invasive gating consists of a digital signal processor （DSP）, an electrocardiography （ECG） detection circuit and a thermoeouple circuit. An enhanced R wave detection algorithm based on zero crossing counts is used to adjust the low sample frequency associated with the respiratory rate of an animal. The thermocouple recognizes the respiration phase by sensing the temperature changes of the nasal airflow of an animal. The proposed gating can accurately generate the gating signal for freely breathing mice （weight of around 0.03 kg）, and its respiratory signal is too weak to be detected. Apart from non-invasiveness, compared with other existing gating techniques, it occupies minimal space at lower cost. Actually, it can be used in micro-computed tomography （CT） and other systems needed to detect the cardiac-pulmonary motion. Several tests validate that the proposed cardiac-pulmonary gating can generate the gating signal as required. By using the gating technique, the image resolution is improved.
文摘为了评估了小动物锥束微型计算机层析图像(micro-CT)中低能X射线散射的大小和对系统成像结果的影响,该文引入了散射率(scatter-to-pri mary ratio,SPR)的概念。采用主射线终止法计算X射线散射率大小,并利用外推拟合法估测直径为0 mm阻挡物的散射值。用铅板制成的狭缝改变系统成像的锥角大小,讨论了锥束micro-CT中锥角大小与散射率的关系。直径40 mm的均匀树脂模型用来模拟小鼠,当锥角分别为0.247°和5.67°时,X射线散射率分别为4.78%和27.58%。讨论了散射对重建图像均一度和对比度的影响。
