Radiology Masterclass

Radiology Masterclass provides online medical imaging educational resources for medical students, junior doctors and allied health care professionals.

Build your skills in medical imaging by using our free to access material, and then sign up to a course completion assessment to prove your knowledge.

For information about COVID-19, please see the COVID-19 discussion pages.

The theoretical Oro-Vasculo-Pulmonary route of infection.

Dr Graham Lloyd-Jones - Director of Radiology Masterclass - presents a hypothesis that transmission of the virus to the lungs is mediated by a direct pathway from the mouth to the lungs via blood vessels. Read the full referenced theory here - Oro-vasculo-pulmonary infection route.

The COVID-19 Pathway: A proposed Oral-Vascular-Pulmonary route of SARS-CoV-2 infection and the importance of oral healthcare measures.

The theory has now been published formally, co-authored by experts in the field of oral healthcare: Dr Shervin Molayem (USA); Dr Carla Cruvinel Pontes (SA); and Prof Iain Chapple (UK). The COVID-19 Pathway: A Proposed Oral-Vascular-Pulmonary Route of SARS-CoV-2 Infection and the Importance of Oral Healthcare Measures. J Oral Med and Dent Res. 2(1):1-25. April 20, 2021.

Theory animation

Watch the short animation to demonstrate the proposed pathway of infection.

The COVID-19 Pathway: A proposed Oral-Vascular-Pulmonary route of SARS-CoV-2 infection and the importance of oral healthcare measures.


Sign up to one of our online certificated course completion assessments today. All our course completion assessments award CPD/CME credits in accordance with the CPD Scheme of the Royal College of Radiologists, London, UK.


Consolidate the knowledge you have gained in the tutorials section by reviewing sample cases in the X-ray Galleries.


New trauma X-ray quiz

See the new practice X-ray interpretation gallery here - Trauma X-ray Quiz - Whole Skeleton

More quizzes coming soon!

Oro-Vasculo-Pulmonary route

Dr Graham Lloyd-Jones explains the theory that SARS-CoV-2 could take the same infection route as seen in endocarditis - via the veins of the mouth, neck, and chest, directly to the pulmonary arteries. Read more here - COVID-19 Oro-Vasculo-Pulmonary route

COVID-19 Lung Disease: A Pulmonary Vasculopathy

Watch the presentation by Dr Graham Lloyd-Jones, Director of Radiology Masterclass, given on November 11th 2020 at the annual conference of the British Society for Haematology, titled - What can the Radiology tell us about the vasculopathy of COVID-19 lung disease?

COVID-19 resources

The COVID-19 pathway video animation

COVID-19 image gallery

Update from Dr Graham Lloyd-Jones, director of Radiology Masterclass. Acute COVID-19 lung disease: A pulmonary vasculopathy - not a respiratory pneumonia

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Recommended textbook

Radiology at a Glance - 2nd Edition

Co-authored by the author of Radiology Masterclass, Radiology at a Glance is a complete overview of medical imaging suitable for medical students, junior doctors and other health professionals. Second edition published September 2017.

Read independent review