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相关概念视频

Temperature Measurement Sites01:14

Temperature Measurement Sites

2.2K
A thermometer measures body temperature. The common sites for measuring body temperature are the oral cavity, axillary region, temporal artery, and skin surface, such as the forehead, abdomen, and axilla. True core body temperature is assessed in the rectum, tympanic membrane, pulmonary artery, esophagus, and urinary bladder.
Oral: When assessing oral temperature, the thermometer tip should be placed under the tongue in the posterior sublingual pocket. It offers accurate readings and can be...
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Regression Analysis01:11

Regression Analysis

6.0K
Regression analysis is a statistical tool that describes a mathematical relationship between a dependent variable and one or more independent variables.
In regression analysis, a regression equation is determined based on the line of best fit– a line that best fits the data points plotted in a graph. This line is also called the regression line. The algebraic equation for the regression line is called the regression equation. It is represented as:
6.0K
Assessing Body Temperature - Temporal Artery01:19

Assessing Body Temperature - Temporal Artery

665
Here is a stepwise guide to assessing the body temperature at the temporal artery using a temporal artery thermometer
Step 1: Perform hand hygiene and don a fresh pair of gloves to prevent cross-infection and ensure patient safety.
Step 2: Explain the procedure to the patient to establish trust. Clear communication establishes trust with the patient, ensures they understand what to expect, promotes cooperation, and enhances comfort during the procedure.  
Step 3: Assess the patient's...
665
Calibration Curves: Linear Least Squares01:20

Calibration Curves: Linear Least Squares

2.1K
A calibration curve is a plot of the instrument's response against a series of known concentrations of a substance. This curve is used to set the instrument response levels, using the substance and its concentrations as standards. Alternatively, or additionally, an equation is fitted to the calibration curve plot and subsequently used to calculate the unknown concentrations of other samples reliably.
For data that follow a straight line, the standard method for fitting is the linear...
2.1K
Equipments Used to Measure Body Temperature01:13

Equipments Used to Measure Body Temperature

1.2K
Body temperature can be assessed using various devices and measured in Celsius or Fahrenheit.
Glass-bulb Thermometer:
Glass-bulb thermometers are hollow glass tubes with a bulb tip containing liquid such as ethanol or mercury. Historically, glass bulb mercury thermometers were the standard device to measure body temperature. Today, mercury thermometers are prohibited in many countries due to the hazardous effects of mercury and the risk of exposure if the glass bulb breaks. In general,...
1.2K
Temperature Dependence on Reaction Rate02:55

Temperature Dependence on Reaction Rate

83.6K
The Collision Theory
Atoms, molecules, or ions must collide before they can react with each other. Atoms must be close together to form chemical bonds. This premise is the basis for a theory that explains many observations regarding chemical kinetics, including factors affecting reaction rates.
The collision theory is based on the postulates that (i) the reaction rate is proportional to the rate of reactant collisions, (ii) the reacting species collide in an orientation allowing contact between...
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相关实验视频

Updated: Sep 10, 2025

Topographical Estimation of Visual Population Receptive Fields by fMRI
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一个基于PRF的多基线配套模型,用于温度预测.

Zhoutong Wang1, Xinju Zhang1, Taijie Zhan1

  • 1Institute of Biothermal Science and Technology, University of shanghai for Science and Technology, Shanghai 200093, China; Shanghai Co-innovation Center for Energy Therapy of Tumors, Shanghai 200093, China; Shanghai Technical Service Platform for Cryopreservation of Biological Resources, Shanghai 200093, China.

Magnetic resonance imaging
|August 20, 2025
PubMed
概括

这项研究引入了一种新的质子共振频率温度计模型,以改善MRI导向的癌症治疗. 改进后的模型提供了更准确的温度监测,特别是在冷条件下进行冷治疗.

关键词:
核磁共振成像 (MRI) 非破坏性温度测量多基线温度测量模型质子共振频率是质子的共振频率.瘤能量治疗的治疗方法

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Assessing Cerebral Autoregulation via Oscillatory Lower Body Negative Pressure and Projection Pursuit Regression
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A Method of Trigonometric Modelling of Seasonal Variation Demonstrated with Multiple Sclerosis Relapse Data
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Assessing Cerebral Autoregulation via Oscillatory Lower Body Negative Pressure and Projection Pursuit Regression
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科学领域:

  • 医疗成像医学成像
  • 生物物理学的生物物理.
  • 在瘤学瘤学.

背景情况:

  • 磁共振成像 (MRI) 能够在体内进行温度分析,在治疗各种疾病时提供精确的热指导.
  • 质子共振频率 (PRF) 温度计,一种MRI技术,在瘤学中面临挑战,原因是图像对齐错误和磁场变化,影响温度跟踪可靠性.

研究的目的:

  • 开发和验证一个新的多基线适配温度预测模型,用于质子共振频率温度计.
  • 解决当前PRF温度计的局限性,提高其用于热疗法的准确性和可靠性,特别是在瘤学中.

主要方法:

  • 开发了一种新的多基线配合模型,处理k空间数据以进行相位重建和denoising.
  • 该模型使用加权最小正方形适配来纠正相位扭曲,并通过信号放大因子来补偿信号衰减.
  • 实验涉及具有不同水分含量的幻体,经过加热和冷 (至 -9.2°C),以测试模型的性能.

主要成果:

  • 新型模型显著减少了根平均平方误差 (RMSE) 从14.62°C/2.99°C降至2.19°C,最大误差从32.29°C/5.74°C降至3.64°C.
  • 实现了0.96的适合性,优于传统的单基线和多基线模型.
  • 首次在零度以下的环境中证明了PRF温度计的有效性,验证了其在冷处理中的使用.

结论:

  • 拟议的多基线配合PRF温度计模型为热疗法中精确的温度监测提供了强大的解决方案.
  • 这一进步解决了低温精度控制方面的关键挑战,显著影响了瘤冷化的有效性和安全性.
  • 经验证的模型提高了基于MRI的温度测量的可靠性,这对于最小侵入性和可重复性癌症治疗至关重要.