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相关概念视频

Variation: Normal Distribution, Range, and Standard Deviation02:32

Variation: Normal Distribution, Range, and Standard Deviation

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In the field of psychology, there are several ways to organize measurements of a trait, feature, or characteristic (i.e., variables). Qualitative data, such as ethnicity, can be tabulated into a frequency count to provide information about the proportion, as well as the variety of groups in a sample or population. On the other hand, researchers can perform a wider set of calculations on quantitative data. The mean, mode, and median, for instance, are central tendency measures to identify a...
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Indicators02:39

Indicators

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Certain organic substances change color in dilute solution when the hydronium ion concentration reaches a particular value. For example, phenolphthalein is a colorless substance in any aqueous solution with a hydronium ion concentration greater than 5.0 × 10−9 M (pH < 8.3). In more basic solutions where the hydronium ion concentration is less than 5.0 × 10−9 M (pH > 8.3), it is red or pink. Substances such as phenolphthalein, which can be used to determine the pH of a solution, are...
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Confirmation Biases01:31

Confirmation Biases

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The confirmation bias is the tendency to focus on information that confirms our existing beliefs and ignore information that is inconsistent with our expectations. For example, if you think that your professor is not very nice, you notice all of the instances of rude behavior exhibited by the professor while ignoring the countless pleasant interactions he is involved in on a daily basis. Have you ever fallen prey to the confirmation bias, either as the source or target of such bias?
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Range00:59

Range

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The range is one of the measures of variation. It can be defined as the difference between a dataset's highest and lowest values. For example, in the study of seven 16-ounce soda cans, the filled volume of soda was measured, thus producing the following amount (in ounces) of soda:
15.9; 16.1; 15.2; 14.8; 15.8; 15.9; 16.0; 15.5
Measurements of the amount of soda in a 16-ounce can vary since different subjects record these measurements or since the exact amount - 16 ounces of liquid, was not...
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Normal Distribution01:11

Normal Distribution

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The normal, a continuous distribution, is the most important of all the distributions. Its graph is a bell-shaped symmetrical curve, which is observed in almost all disciplines. Some of these include psychology, business, economics, the sciences, nursing, and, of course, mathematics. Some instructors may use the normal distribution to help determine students’ grades. Most IQ scores are normally distributed. Often real-estate prices fit a normal distribution. The normal distribution is...
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Normal Stress01:19

Normal Stress

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Normal stress is a type of stress that occurs when forces act perpendicular, or normal, to a material's cross-sectional area. This stress often arises in structures when subjected to axial loading, which is the application of force along the axis of an object. A practical example of this can be found in bridge truss members.
When a rod is under axial loading, the internal forces and corresponding stress are normal to the plane of the section, so it is termed normal stress. It's important to...
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相关实验视频

Updated: Feb 4, 2026

Functional Human Liver Preservation and Recovery by Means of Subnormothermic Machine Perfusion
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确认梅布罗芬因肝功能指数的正常范围.

Kathy P Willowson1,2, Geoff Schembri1, Elizabeth A Bailey1

  • 1Department of Nuclear Medicine, Royal North Shore Hospital, Sydney, Australia.

Asia Oceania journal of nuclear medicine & biology
|February 2, 2026
PubMed
概括
此摘要是机器生成的。

这项研究确定了 technetium-99m mebrofenin hepatobiliary scintigraphy (HBS) 肝功能指数的正常范围. 以身体表面积 (MURBSA) 为正常化的梅布罗芬因肝脏吸收率约为8.0±1.5%/分钟/m2,正常的下限为5.1%/分钟/m2.

关键词:
肝胆道光学扫描是肝胆道光学扫描.肝脏 肝脏 肝脏 肝脏梅布罗芬宁是一种药物.门静脉栓塞 放射栓塞 门静脉栓塞 放射栓塞

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科学领域:

  • 核医学是一种核医学.
  • 诊断成像 诊断成像 诊断成像
  • 肝胆道系统 肝胆道系统

背景情况:

  • 使用 technetium-99m mebrofenin 进行肝胆膜扫描 (HBS) 对于评估肝功能至关重要.
  • 建立可靠的正常范围和理解测量不确定性对于准确的临床解释至关重要.

研究的目的:

  • 为了定义[99mTc] Tc-Mebrofenin HBS肝功能指数的正常范围.
  • 量化与HBS.区域配置相关的临床测量中的不确定性.
  • 调查肝功能指数与患者年龄之间的相关性.

主要方法:

  • 47名没有肝病的患者接受了动态HBS与[99mTc]Tc-Mebrofenin.
  • 计算了血液池清除率,血液清除半程,梅布罗芬因肝脏吸收率 (MUR) 和正常化为身体表面积的MUR (MURBSA).
  • 用户内部的变化和不确定性通过重复测量来评估.

主要成果:

  • 该队列的平均MURBSA为8.0±1.5%/分钟/m2,正常的下限为5.1%/分钟/m2.
  • 在肝功能指数和患者年龄之间没有发现显著的相关性.
  • 发现MURBSA的临床测量具有±0.6%/分钟/m2的不确定性.

结论:

  • MURBSA的正常范围大约为8.0±1.5%/分钟/m2,下限为5.1%/分钟/m2.
  • 低于确定的正常限值的MURBSA值可能表明在接受肝脏手术或治疗的患者中风险更高.
  • 准确的HBS指数范围对于肝病管理中的风险分层至关重要.