CT Score in HRCT What Does It Mean? YouTube Lecture Handouts

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CT Score in HRCT or CT Scan: CORADS? Covid-19 - Difference from CT Value in RT-PCR

Title: CT Score in HRCT What Does It Mean?

CT Score in CT SCAN

  • High-Resolution Computed Tomography (HRCT) tests
  • The chest scans are being increasingly ordered for patients at risk- those who are showing classic signs of the infection but get a negative COVID RT-PCR report (either due to faulty testing or premature incubation period) .
  • While the usual PCR tests- RAT (Rapid Antigen Tests) and RT-PCR (Real-Time Polymerase Chain Reaction Tests) find out the viral presence by collecting samples from the nose and/or the throat, an HRCT test is a diagnostic tool that involves imaging of the lungs.

Indicators in HRCT

Indicators in HRCT
  • HRCT report showcases the presence of glass-like ground, opaque opacities in the lung cavities, which are a crucial marker of COVID severity. The ground glass markers signal involvement of the lungs and additionally, for COVID-19 patients, denote the severity as well as the likeliness of infection in the vital organs.
  • CORADS, which stands for COVID-19 Reporting and Data System determines the level of infection and involvement because of the virus. CORAD scoring is done on the basis of 1 - 6, wherein 1 signifies a ‘negative COVID’ or normal lung function, scores 2 - 4 signify suspected viral involvement and a reading of 5 means classic COVID-19. A person who has detectable ground opacities in the lungs is given a score of 6 and said to be at a higher risk of COVID severity.
  • CT Score – Different labs go by different readings, with most scores being considered between 1 - 40 or 1 - 25. A higher score usually represents greater lung involvement and high COVID severity.

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