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Related Concept Videos

Imaging Studies for Cardiovascular System V: CT01:28

Imaging Studies for Cardiovascular System V: CT

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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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Computed Tomography01:10

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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.
The technique was invented in the 1970s and is based on the principle that as X-rays pass through the body, they are absorbed or reflected at different levels. In the technique, a patient lies on a motorized platform while a computerized axial tomography (CAT) scanner rotates...
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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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Imaging Studies III: Computed Tomography01:27

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DefinitionComputed Tomography (CT) of the genitourinary (GU) tract is a non-invasive imaging modality that utilizes X-rays and computer processing to generate detailed cross-sectional images of the urinary system, encompassing the kidneys, ureters, bladder, and adjacent structures such as the adrenal glands.PurposeCT scans of the GU tract serve several diagnostic and therapeutic purposes, including:Diagnosis of Urinary Tract Diseases: Detects kidney stones, tumors, cysts, and congenital...
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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.
Pulmonary Angiogram
A Pulmonary Angiogram is an invasive procedure involving injecting a contrast medium through a catheter threaded into the pulmonary artery or the right side of the heart to visualize the pulmonary vasculature. Computed Tomography (CT) scans have mainly replaced this...
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Imaging Studies for Cardiovascular System VI: Calcium -Scoring CT01:25

Imaging Studies for Cardiovascular System VI: Calcium -Scoring CT

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Calcium-Scoring CT ScanA calcium-scoring CT scan, also known as coronary artery calcium (CAC) scan, detects calcium deposits in the coronary arteries. This test assesses the risk of coronary artery disease (CAD), which can lead to cardiovascular events such as angina, heart failure, and sudden cardiac arrest.A calcium-scoring CT scan is generally recommended for individuals at intermediate risk of CAD without symptoms. It includes:Men aged 40-75 and women aged 50-75: Especially those with a...
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Updated: Nov 22, 2025

Lung CT Segmentation to Identify Consolidations and Ground Glass Areas for Quantitative Assesment of SARS-CoV Pneumonia
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Computed tomography chest in COVID-19: When & why?

Mandeep Garg1, Nidhi Prabhakar1, Ashu Seith Bhalla2

  • 1Department of Radiodiagnosis & Imaging, Postgraduate Institute of Medical Education & Research, Chandigarh, India.

The Indian Journal of Medical Research
|January 6, 2021
PubMed
Summary
This summary is machine-generated.

Computed tomography (CT) of the chest is a valuable tool for diagnosing and managing COVID-19 but should not be used routinely. This review outlines specific indications for CT chest in suspect, positive, and recovered COVID-19 patients to ensure judicious use.

Keywords:
COVID-19ChestRT-PCRcomorbiditiescomputed tomography scanthromboembolism

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Area of Science:

  • Radiology
  • Infectious Diseases
  • Pulmonology

Background:

  • Computed tomography (CT) of the chest is frequently utilized in the diagnosis and management of coronavirus disease 2019 (COVID-19).
  • However, the indiscriminate use of CT chest may lead to unnecessary radiation exposure and healthcare costs.
  • Clear guidelines are needed to define the appropriate role of CT chest in various COVID-19 patient cohorts.

Purpose of the Study:

  • To review and delineate the specific indications for performing CT chest in patients with suspected, confirmed, or recovered COVID-19.
  • To provide evidence-based recommendations for the judicious application of CT chest in the context of the COVID-19 pandemic.
  • To differentiate scenarios where CT chest offers significant clinical value versus those where alternative imaging modalities suffice.

Main Methods:

  • Systematic review of current scientific evidence regarding CT chest utilization in COVID-19.
  • Analysis of personal clinical experience in managing COVID-19 patients with varying imaging needs.
  • Evaluation of CT chest's diagnostic performance (sensitivity, specificity) in different clinical settings.

Main Results:

  • CT chest is not recommended for routine screening due to low sensitivity and specificity.
  • Indications include specific subsets of RT-PCR negative suspects with high clinical suspicion and indeterminate chest X-rays.
  • CT chest is valuable for COVID-19 patients with unexplained deterioration, suspected pulmonary embolism, or concurrent lung pathology, and in specific high-risk comorbid patients.
  • CT chest is crucial for ruling out lung fibrosis in recovered COVID-19 patients presenting with persistent respiratory symptoms.

Conclusions:

  • CT chest is an indispensable, yet not universally indicated, diagnostic tool in COVID-19 management.
  • Its use should be reserved for specific clinical scenarios where it significantly impacts patient care and decision-making.
  • Judicious application of CT chest, guided by clinical suspicion and patient characteristics, is paramount.