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Related Concept Videos

Uncertainty in Measurement: Reading Instruments02:46

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Counting is the type of measurement that is free from uncertainty, provided the number of objects being counted does not change during the process. Such measurements result in exact numbers. By counting the eggs in a carton, for instance, one can determine exactly how many eggs are there in the carton. Similarly, the numbers of defined quantities are also exact. For example, 1 foot is exactly 12 inches, 1 inch is exactly 2.54 centimeters, and 1 gram is exactly 0.001 kilograms. Quantities...
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Every measurement provides three kinds of information: the size or magnitude of the measurement (a number), a standard of comparison for the measurement (a unit), and an indication of the uncertainty of the measurement. While the number and unit are explicitly represented when a quantity is written, the uncertainty is an aspect of the errors in the measurement results.
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Scientists typically make repeated measurements of a quantity to ensure the quality of their findings and to evaluate both the precision and the accuracy of their results. Measurements are said to be precise if they yield very similar results when repeated in the same manner. A measurement is considered accurate if it yields a result that is very close to the true or the accepted value. Precise values agree with each other; accurate values agree with a true value. 
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Quantitative analysis is a technique for measuring the amount of specific constituents in a sample. When the sample's composition is unknown, qualitative analysis is performed first to identify its components, which ensures that the correct substances are measured during the quantitative phase.
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All the digits in a measurement, including the uncertain last digit, are called significant figures or significant digits. Note that zero may be a measured value; for example, if a scale that shows weight to the nearest pound reads “140,” then the 1 (hundreds), 4 (tens), and 0 (ones) are all significant (measured) values.
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Quantitative Analysis of Uncertainty in Medical Reporting: Creating a Standardized and Objective Methodology.

Bruce I Reiner1

  • 1Department of Radiology, Veterans Affairs Maryland Healthcare System, 10 North Greene Street, Baltimore, MD, 21201, USA. breiner1@comcast.net.

Journal of Digital Imaging
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PubMed
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Standardizing how medical reports express uncertainty can improve communication and patient care. Computerized methods can analyze this uncertainty language for better diagnostic confidence and decision support.

Keywords:
Data miningMachine learningNatural language processingReport uncertainty

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Area of Science:

  • Medical Informatics
  • Natural Language Processing
  • Clinical Decision Support

Background:

  • Uncertainty in medical reports causes miscommunication and clinical issues.
  • Standardized methods are needed to characterize and quantify uncertainty language.

Purpose of the Study:

  • To develop a standardized methodology for characterizing and quantifying uncertainty in medical reports.
  • To provide context on diagnostic confidence and accuracy for report authors and readers.

Main Methods:

  • Utilizing computerized strategies such as string search.
  • Employing natural language processing and understanding (NLP/NLU).
  • Applying histogram analysis, topic modeling, and machine learning.

Main Results:

  • Derived uncertainty data allows objective, real-time analysis of report uncertainty.
  • Potential to correlate uncertainty data with outcomes for decision support.

Conclusions:

  • A standardized approach to analyzing uncertainty language in medical reports is feasible.
  • This analysis can enhance point-of-care decision support and clinical impact.