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Related Concept Videos

Quantitative Analysis01:12

Quantitative Analysis

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.
In quantitative analysis, two key measurements are made: the sample quantity and a property proportional to the amount of the analyte (the substance being analyzed). This forms the basis of the method...
Types of Biopharmaceutical Studies: Controlled and Non-Controlled Approaches01:23

Types of Biopharmaceutical Studies: Controlled and Non-Controlled Approaches

Biopharmaceutical studies constitute a vital field aiming to enhance drug delivery methods and refine therapeutic approaches, drawing upon diverse interdisciplinary knowledge. In research methodologies, the choice between controlled and non-controlled studies significantly influences the study's reliability and accuracy.
Non-controlled studies, commonly employed for initial exploration, lack a control group, rendering them susceptible to biases and external influences. In contrast, controlled...
Relative Risk01:12

Relative Risk

Relative risk (RR) is a statistical measure commonly used in epidemiology to compare the likelihood of a particular event occurring between two groups. This metric is important for evaluating the relationship between exposure to a specific risk factor and the probability of a particular outcome. It plays a crucial role in medical research, public health studies, and risk assessment. Relative risk quantifies how much more (or less) likely an event is to occur in an exposed group compared to an...
Actuarial Approach01:20

Actuarial Approach

The actuarial approach, a statistical method originally developed for life insurance risk assessment, is widely used to calculate survival rates in clinical and population studies. This method accounts for participants lost to follow-up or those who die from causes unrelated to the study, ensuring a more accurate representation of survival probabilities.
Consider the example of a high-risk surgical procedure with significant early-stage mortality. A two-year clinical study is conducted,...
Design Example: Analyzing Capacity Contours for Flood Risk Assessment01:17

Design Example: Analyzing Capacity Contours for Flood Risk Assessment

Flood risk assessment involves careful planning and analysis to ensure the safety of communities near water retention structures. Capacity contours are a vital tool in this process, as they illustrate the potential spread of water at specific levels in a given area. In the context of building a bund across a small valley, these contours play a critical role in evaluating the safety of nearby residential areas.In this example, the bund is intended to store stormwater in the valley. The engineers...
Hazard Rate01:11

Hazard Rate

The hazard rate, also known as the hazard function or failure rate, is a statistical measure used to describe the instantaneous rate at which an event occurs, given that the event has not yet happened. From a probabilistic perspective, it represents the likelihood that a subject will experience the event in a very small time interval, conditional on surviving up to the beginning of that interval. In terms of frequency, the hazard rate can be viewed as the ratio of the number of events to the...

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Related Experiment Video

Updated: Jun 21, 2026

Measuring the Subjective Value of Risky and Ambiguous Options using Experimental Economics and Functional MRI Methods
13:04

Measuring the Subjective Value of Risky and Ambiguous Options using Experimental Economics and Functional MRI Methods

Published on: September 19, 2012

Is there a place for quantitative risk assessment?

Eric J Hall1

  • 1Columbia University Medical Center, New York, NY, USA.

Journal of Radiological Protection : Official Journal of the Society for Radiological Protection
|May 21, 2009
PubMed
Summary

Quantitative risk estimates for ionizing radiation are crucial for assessing medical procedures. Uncertainties in low-dose diagnostic X-rays, radiotherapy, and proton therapy pose significant challenges in risk-benefit analysis.

Area of Science:

  • Medical Physics
  • Radiation Oncology
  • Radiology

Background:

  • Ionizing radiation is integral to modern medicine but is a known human carcinogen.
  • Public perception of radiation risks varies significantly, necessitating quantitative risk assessments.
  • Uncertainties in radiation risk estimates impact the evaluation of medical procedures.

Purpose of the Study:

  • To highlight areas where quantitative risk estimates for ionizing radiation are needed.
  • To discuss the limitations and uncertainties in current radiation risk assessments.
  • To examine the practical implications of these uncertainties in medical applications.

Main Methods:

  • Review of current practices and data in diagnostic radiology, radiation oncology, and proton therapy.

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Last Updated: Jun 21, 2026

Measuring the Subjective Value of Risky and Ambiguous Options using Experimental Economics and Functional MRI Methods
13:04

Measuring the Subjective Value of Risky and Ambiguous Options using Experimental Economics and Functional MRI Methods

Published on: September 19, 2012

Watershed Planning within a Quantitative Scenario Analysis Framework
12:44

Watershed Planning within a Quantitative Scenario Analysis Framework

Published on: July 24, 2016

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05:37

An R-Based Landscape Validation of a Competing Risk Model

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  • Identification of critical knowledge gaps in low-dose and fractionated high-dose radiation effects.
  • Analysis of uncertainties in neutron relative biological effectiveness for proton therapy.

    • Main Results:

    • Increased CT and interventional radiology use necessitates accurate low-dose risk data for benefit-risk assessment.
    • Intensity-modulated radiation therapy (IMRT) requires refined risk data for fractionated high doses.
    • Proton therapy's neutron leakage poses risks due to uncertain relative biological effectiveness.

    Conclusions:

    • Accurate low-dose risk estimates are essential for diagnostic X-ray procedures.
    • Further research into high-dose fractionated radiation is needed for radiotherapy.
    • Understanding neutron risks in proton therapy is critical for safety and cost-effectiveness.