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Related Concept Videos

Radiological Investigation I: X-ray and CT01:30

Radiological Investigation I: X-ray and CT

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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...
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Pneumonia poses the potential for numerous complications that warrant consideration. These complications include the following:
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Pneumothorax-II01:27

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Pneumothorax is a medical condition defined by the buildup of air in the pleural space between the lungs and the chest wall. This accumulation of air can lead to partial or complete lung collapse, resulting in a range of clinical manifestations. Understanding the clinical presentation and effective management strategies is crucial for healthcare professionals in providing timely and appropriate care to individuals with pneumothorax.
Clinical Manifestations:
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Imaging Studies for Cardiovascular System III: X-Ray01:20

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The most common cardiovascular diagnostic test is an X-ray. It produces images of the heart, blood vessels, and adjacent structures.
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An X-ray, or radiograph, is a non-invasive method that uses ionizing radiation to take images of internal structures. It is mainly used in cardiac imaging to examine the heart, lungs, and major blood vessels, aiming to identify abnormalities in the heart's size, shape, and position, such as heart failure, congenital defects, and vascular...
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Radiological Investigation III: Pulmonary Angiogram and PET Scan01:13

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Radiological investigations are paramount in the diagnosis and management of various pulmonary diseases. Two essential investigations are the Pulmonary Angiogram and the Positron Emission Tomography (PET) Scan.
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Tomography refers to imaging by sections. Computed tomography (CT) is a non-invasive imaging technique that uses computers to analyze several cross-sectional X-rays to reveal minute details about structures in the body.
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Related Experiment Video

Updated: Aug 24, 2025

Lung CT Segmentation to Identify Consolidations and Ground Glass Areas for Quantitative Assesment of SARS-CoV Pneumonia
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COVID19 Diagnosis Using Chest X-rays and Transfer Learning.

Jonathan Stubblefield1, Jason Causey2, Dakota Dale3

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|October 20, 2022
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Summary

This study developed an XGBoost model for diagnosing COVID-19 from chest X-rays, achieving high precision. The model shows promise as a "rule-in" diagnostic tool for COVID-19.

Keywords:
COVID19Chest X-RayMachine LearningMedical ImagingTransfer Learning

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Area of Science:

  • Medical Imaging
  • Artificial Intelligence
  • Infectious Disease Diagnostics

Background:

  • The COVID-19 pandemic necessitates rapid and accurate diagnostic tools.
  • Medical imaging, particularly chest X-rays, is being explored for COVID-19 detection using machine learning.

Approach:

  • A transfer-learning approach was employed to develop COVID-19 diagnostic models from chest X-rays.
  • A dataset of 112,120 negative and 2,725 positive chest X-ray images was compiled.
  • Various models, including logistic regression, random forest, and XGBoost, were evaluated using five-fold cross-validation, compared against COVID-Net.

Key Points:

  • The best performing model was XGBoost with principal components, achieving a recall of 0.692, precision of 0.960, and F1-score of 0.804.
  • This XGBoost model significantly outperformed the COVID-Net model (recall: 0.987, precision: 0.025, F1-score: 0.048).
  • The developed model demonstrates high precision and reasonable sensitivity, suitable as a "rule-in" test for COVID-19.

Conclusions:

  • The XGBoost model offers a promising approach for COVID-19 diagnosis using chest X-rays.
  • Further clinical studies are recommended before widespread screening implementation.