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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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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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Description
Magnetic Resonance Imaging (MRI) and Ventilation Perfusion Scans are two radiological investigations that offer detailed diagnostic images of the body, particularly lung structures.
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MRI uses magnetic fields and radiofrequency signals to distinguish between normal and abnormal tissues. This technology provides a more detailed diagnostic image than CT scans, enabling it to characterize pulmonary nodules, stage bronchogenic carcinoma, and evaluate inflammatory activity in...
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Introduction: MRI and CT scans are crucial advancements in medical imaging techniques, playing a vital role in diagnosing conditions related to the gastrointestinal (GI) system. Each scan serves distinct purposes, targets specific areas, and requires unique nursing duties.
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Cardiac computed tomography (CT) scanning is an advanced cardiac imaging technique that utilizes CT technology, with or without intravenous (IV) contrast, to produce accurate cross-sectional virtual slices of specific areas of the heart, coronary circulation, and major blood vessels such as the aorta, pulmonary veins, and arteries. The computer processes these slices to generate three-dimensional images. Multidetector CT (MDCT) is a rapid form of CT scanning that captures multiple slices...
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Updated: Sep 6, 2025

Lung CT Segmentation to Identify Consolidations and Ground Glass Areas for Quantitative Assesment of SARS-CoV Pneumonia
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Post-COVID-19 tomographic abnormalities.

M V Y Sawamura1, C G Y Verrastro2, E V M Ferreira3

  • 1Instituto de Radiologia, Hospital das Clínicas da Universidade de São Paulo (HCFMUSP), Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brazil.

The International Journal of Tuberculosis and Lung Disease : the Official Journal of the International Union Against Tuberculosis and Lung Disease
|June 30, 2022
PubMed
Summary
This summary is machine-generated.

Persistent pulmonary abnormalities are common 90 days after COVID-19, with ground-glass opacities and parenchymal bands being prevalent. Both high-resolution computed tomography (HRCT) analysis techniques effectively identified these lung abnormalities.

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Area of Science:

  • Pulmonology
  • Radiology
  • Infectious Diseases

Background:

  • Persistent respiratory symptoms after COVID-19 are not always common, but pulmonary abnormalities can occur.
  • Assessing long-term lung health post-COVID-19 is crucial for understanding disease sequelae.

Purpose of the Study:

  • To determine the prevalence of tomographic abnormalities 90 days post-COVID-19 symptom onset.
  • To compare the efficacy of two chest high-resolution computed tomography (HRCT) analysis techniques for evaluating these abnormalities.

Main Methods:

  • A multicenter study evaluated hospitalized COVID-19 patients with low oxygen saturation.
  • Pulmonary function and chest HRCT scans were performed 90 days after symptom onset.
  • Images were analyzed by two radiologists and quantified using automated software.

Main Results:

  • 81% of patients showed pulmonary lobe abnormalities 90 days after discharge, with 84% detected by the automated algorithm.
  • Ground-glass opacities (76%) and parenchymal bands (65%) were the most common findings.
  • Both HRCT analysis techniques demonstrated high sensitivity (95.9%) and positive predictive value (92%).

Conclusions:

  • A high prevalence of pulmonary abnormalities exists on chest HRCT 90 days after COVID-19 symptom onset.
  • Both evaluated HRCT technical assessments are suitable for analyzing post-COVID-19 lung images.