Related Experiment Video
Updated: Feb 2, 2026
07:53
Author Spotlight: Advancing 3D Modeling for Enhanced Diagnosis and Treatment of Pulmonary Nodules in Early-Stage Lung Cancer
Published on: October 13, 2023
2.1K
Variable radiological lung nodule evaluation leads to divergent management recommendations.
Arjun Nair1,2, Emily C Bartlett3,2, Simon L F Walsh3
1Dept of Radiology, University College London Hospitals NHS Foundation Trust, London, UK.
The European Respiratory Journal
|November 10, 2018
Summary
International radiologists show good agreement on lung nodule composition but vary in management recommendations. This variation impacts patient care decisions for incidentally detected pulmonary nodules on CT scans.
Area of Science:
- Radiology
- Thoracic Imaging
- Medical Decision Making
Background:
- Incidental lung nodules detected on computed tomography (CT) require careful radiological evaluation and management.
- International variation in radiological practice can influence patient outcomes.
- Standardized characterization and management guidelines aim to reduce variability.
Purpose of the Study:
- To assess international variation in the characterization of pulmonary nodules.
- To evaluate hypothetical guideline-derived management of lung nodules.
- To analyze radiologists' actual management recommendations for incidentally detected lung nodules.
Main Methods:
- 107 radiologists from 25 countries evaluated 69 lung nodules on CT scans.
- Data collected included nodule composition, morphology, dimensions, and recommended management.
- Hypothetical management decisions were modeled using Fleischner Society (2005, 2017) and British Thoracic Society (2015) guidelines.
Main Results:
- Good agreement was observed for nodule composition (Fleiss' κ=0.65), with poorest agreement for part-solid nodules.
- Agreement on morphological features like spiculation was poor-to-moderate (κ=0.23-0.53).
- Significant variation in diameter measurements occurred at key thresholds (5mm, 6mm), leading to poor agreement in radiologists' recommendations (κ=0.30).
Conclusions:
- While guideline-based management shows good agreement, radiologists' actual recommendations for lung nodules vary significantly.
- Discrepancies in nodule characterization, particularly for part-solid nodules and size measurements, contribute to management variability.
- Further standardization in radiological interpretation and guideline application is needed for consistent patient management.
Related Concept Videos
01:15Divergence and Curl
3.2K
The divergence of a vector field at a point is the net outward flow of the flux out of a small volume through a closed surface enclosing the volume, as the volume tends to zero. More practically, divergence measures how much a vector field spreads out or diverges from a given point. For an outgoing flux, conventionally, the divergence is positive. The diverging point is often called the "source" of the field. Meanwhile, the negative divergence of a vector field at a point means that the vector...
3.2K
01:06Divergence and Stokes' Theorems
3.7K
The divergence and Stokes' theorems are a variation of Green's theorem in a higher dimension. They are also a generalization of the fundamental theorem of calculus. The divergence theorem and Stokes' theorem are in a way similar to each other; The divergence theorem relates to the dot product of a vector, while Stokes' theorem relates to the curl of a vector. Many applications in physics and engineering make use of the divergence and Stokes' theorems, enabling us to write...
3.7K
02:37Gene Duplication and Divergence
8.0K
The seminal work of Ohno in 1970 popularized the idea of gene duplication and divergence. DNA sequence comparison studies reveal that a large portion of the genes in bacteria, archaebacteria, and eukaryotes was generated by gene duplication and divergence, indicating its critical role in evolution.
The duplicated copies of the gene are called Paralogs. Paralogs with similar sequences and functions form a gene family. Across several species, a large number of gene families are...
The duplicated copies of the gene are called Paralogs. Paralogs with similar sequences and functions form a gene family. Across several species, a large number of gene families are...
8.0K
01:30Radiological Investigation I: X-ray and CT
1.2K
Radiological investigations, including X-rays and computed tomography (CT) scans, are critical for diagnosing and evaluating various medical conditions. These imaging techniques provide valuable insights into the body's internal structures, aiding in the detection of abnormalities, assessment of disease progression, and development of treatment strategies. This article delves into two primary radiological investigations, chest X-rays and CT scans, outlining their purpose, procedures, and...
1.2K
01:25Divergence and Curl of Electric Field
7.2K
The divergence of a vector is a measure of how much the vector spreads out (diverges) from a point. For example, an electric field vector diverges from the positive charge and converges at the negative charge. The divergence of an electric field is derived using Gauss's law and is equal to the charge density divided by the permittivity of space. Mathematically, it is expressed as
7.2K
01:26Divergence and Curl of Magnetic Field
4.0K
The magnetic field due to a volume current distribution given by the Biot–Savart Law can be expressed as follows:
4.0K