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Related Concept Videos

Standard Enthalpy of Formation02:37

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Enthalpy changes are typically tabulated for reactions in which both the reactants and products are at the same conditions. A standard state is a commonly accepted set of conditions used as a reference point for the determination of properties under other different conditions. For chemists, the IUPAC standard state refers to materials under a pressure of 1 bar and solutions at 1 M and does not specify a temperature. Many thermochemical tables list values with a standard state of 1 atm. Because...
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On comparing the reactivity of silver and lead, it is observed that the two ionic species, Ag+ (aq) and Pb2+ (aq), show a difference in their redox reactivity towards copper: the silver ion undergoes spontaneous reduction, while the lead ion does not. This relative redox activity can be easily quantified in electrochemical cells by a property called cell potential. This property is commonly known as cell voltage in electrochemistry, and it is a measure of the energy which accompanies the charge...
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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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The free energy change for a reaction that occurs under the standard conditions of 1 bar pressure and at 298 K is called the standard free energy change. Since free energy is a state function, its value depends only on the conditions of the initial and final states of the system. A convenient and common approach to the calculation of free energy changes for physical and chemical reactions is by use of widely available compilations of standard state thermodynamic data. One method involves the...
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Standard solutions refer to solutions with a precisely known concentration or composition. A primary standard is a highly pure, high molar mass, stable substance that is entirely soluble in water, the most commonly used solvent in analytical chemistry. The primary standard solution can be used to standardize secondary standards, which are substances with known concentrations but are less pure and stable. Standard solutions are essential for achieving accurate and reliable results in analytical...
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Standard precautions are the minimum infection control safeguards used while caring for all patients, irrespective of their disease condition. They help prevent the spread of common infectious microorganisms to healthcare workers, patients, and visitors in all healthcare settings.
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RadRepro CBCT: An Open-Access CBCT Phantom Dataset for Improved Standardization and Reproducibility of Radiomics

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|February 14, 2026
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This summary is machine-generated.

Researchers developed an open-access dataset of cone-beam computed tomography (CBCT) images to address radiomics reproducibility challenges. This resource aids in standardizing CBCT radiomics research and developing reliable clinical models.

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Area of Science:

  • Medical Imaging
  • Radiotherapy Physics
  • Quantitative Imaging

Background:

  • Radiomics offers significant potential for enhancing cancer diagnosis, prognosis, and treatment planning.
  • Reproducibility of radiomics features is hindered by variations in imaging equipment, protocols, and reconstruction techniques.

Purpose of the Study:

  • To introduce the first open-access cone-beam computed tomography (CBCT) phantom dataset for assessing radiomics reproducibility.
  • To facilitate the standardization of CBCT radiomics research and improve feature stability.

Main Methods:

  • Utilized a Catphan phantom to acquire 120 CBCT volumes across multiple on-board imaging systems.
  • Varied imaging parameters such as mAs, slice thickness, and reconstruction filters.
  • Included region of interest (ROI) segmentations and radiomics features for comprehensive analysis.

Main Results:

  • The dataset enables thorough testing of radiomics feature stability across different vendors and acquisition settings.
  • Provides a foundation for evaluating intra- and inter-vendor variability in CBCT radiomics.

Conclusions:

  • The open-access CBCT phantom dataset is crucial for advancing reproducible radiomics research in radiotherapy.
  • Aims to support the development of robust radiomics models for improved clinical decision-making.