Britain's Prime Minister Boris Johnson listens to Consultant Radiologist Dr. Ashish Saini during a visit at the Finchley Memorial Hospital, an NHS (National Health Service) community hospital, in North London, Britain January 18, 2022. Ian Vogler/Pool via REUTERS 

Radiologist Fernando Cesar Carvalho de Almeida, 64, receives the AstraZeneca/Oxford coronavirus disease (COVID-19) vaccine at a public hospital in Rio de Janeiro, Brazil, January 27, 2021. REUTERS/Pilar Olivares 

Radiologists Emma Parker and Gemma Ainsworth prepare patient Doreen Mount for an X-ray in the X-Ray department at The Royal Blackburn Teaching Hospital in East Lancashire, following the outbreak of the coronavirus disease (COVID-19), in Blackburn, Britain, May 14, 2020. Picture taken May 14, 2020. REUTERS/Hannah McKay/Pool 

Radiologists Emma Parker and Gemma Ainsworth comfort a patient before an X-ray in the X-ray department at The Royal Blackburn Teaching Hospital in East Lancashire, following the outbreak of the coronavirus disease (COVID-19), in Blackburn, Britain, May 14, 2020. Picture taken May 14, 2020. REUTERS/Hannah McKay/Pool 

Patient Doreen Mount is comforted by a Radiologist in the X-ray department at The Royal Blackburn Teaching Hospital in East Lancashire, following the outbreak of the coronavirus disease (COVID-19), in Blackburn, Britain, May 14, 2020. Picture taken May 14, 2020. REUTERS/Hannah McKay/Pool 

Radiologists Emma Parker and Gemma Ainsworth prepare patient Doreen Mount for an X-ray in the X-Ray department at The Royal Blackburn Teaching Hospital in East Lancashire, following the outbreak of the coronavirus disease (COVID-19), in Blackburn, Britain, May 14, 2020. Picture taken May 14, 2020. REUTERS/Hannah McKay/Pool 

A Radiologist comforts patient Doreen Mount before having an X-ray in the X-ray department at The Royal Blackburn Teaching Hospital in East Lancashire, following the outbreak of the coronavirus disease (COVID-19), in Blackburn, Britain, May 14, 2020. Picture taken May 14, 2020. REUTERS/Hannah McKay/Pool TPX IMAGES OF THE DAY 

A radiologist shows infected lungs by the coronavirus disease (COVID-19) at the CHR Centre Hospitalier Regional de la Citadelle Hospital in Liege, Belgium, April 22, 2020. REUTERS/Yves Herman 

Dr. Brandon Crum (L) gathers information from former coal miner Don Pauley, who has black lung disease after working 33 years underground in mines, at United Medical Group in Pikeville, Kentucky, U.S., May 22, 2018. Dr. Crum, a fourth generation coal miner whose family members still mine coal, is the radiologist who first noticed the massive number of x-rays of complicated black lung in the region. REUTERS/Brian Snyder SEARCH "BLACK LUNG" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

Binders and boxes store the large database of black lung cases and histories gathered by Dr. Brandon Crum at United Medical Group in Pikeville, Kentucky, U.S., May 22, 2018. Dr. Crum, a fourth generation coal miner whose family members still mine coal, is the radiologist who first noticed the massive number of x-rays of complicated black lung in the region and his black lung disease database tracks variables such as which vein miners worked, and the type of job they did. REUTERS/Brian Snyder SEARCH "BLACK LUNG" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

Radiological technician Mark Davis looks at the chest x-ray of retired coal miner James Marcum, who has complicated black lung disease, at the Stone Mountain Health Services in St. Charles, Virginia, U.S., May 18, 2018. According to Davis, there are no digital x-ray machines in the county, except at a veterinary clinic, so the x-ray film has to be sent to a radiologist to be read, adding weeks to the process of diagnosis. REUTERS/Brian Snyder SEARCH "BLACK LUNG" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

Dr. Brandon Crum explains chest x-rays to former coal miner Wade Pauley, who has black lung disease after working 33 years underground in mines, at the United Medical Group in Pikeville, Kentucky, U.S., May 22, 2018. Dr. Crum, a fourth generation coal miner whose family members still mine coal, is the radiologist who first noticed the recent massive number of x-rays of complicated black lung in the region. REUTERS/Brian Snyder SEARCH "BLACK LUNG" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

Physician, scientist, radiologist and biomedical engineer Elias Zerhouni, Scientific Advisor and President Global Research and Development of French drugmaker Sanofi, poses at the company's headquarters in Paris, France, March 3, 2017. Picture March 3, 2017. REUTERS/Charles Platiau 

Physician, scientist, radiologist and biomedical engineer Elias Zerhouni, Scientific Advisor and President Global Research and Development of French drugmaker Sanofi, poses at the company's headquarters in Paris, France, March 3, 2017. Picture March 3, 2017. REUTERS/Charles Platiau 

Physician, scientist, radiologist and biomedical engineer Elias Zerhouni, Scientific Advisor and President Global Research and Development of French drugmaker Sanofi, poses at the company's headquarters in Paris, France, March 3, 2017. Picture March 3, 2017. REUTERS/Charles Platiau 

Physician, scientist, radiologist and biomedical engineer Elias Zerhouni, Scientific Advisor and President Global Research and Development of French drugmaker Sanofi, poses at the company's headquarters in Paris, France, March 3, 2017. Picture March 3, 2017. REUTERS/Charles Platiau 

Physician, scientist, radiologist and biomedical engineer Elias Zerhouni, Scientific Advisor and President Global Research and Development of French drugmaker Sanofi, poses at the company's headquarters in Paris, France, March 3, 2017. Picture March 3, 2017. REUTERS/Charles Platiau 

Radiologists take pictures as Nicolas Sarkozy, former head of the Les Republicains political party, visits a radiology center in Franconville, as part of his campaign for the French conservative presidential primary, September 19, 2016. REUTERS/Philippe Wojazer

A shoe-clad foot is seen sticking out of a plaster cast mould of a Pompeii victim, at the laboratory in the ancient Roman city, Pompeii, October 13, 2015. An expert team made up of archaeologists, radiologists, orthodontists and anthropologists began on September 2015 to use CAT scan technology (computerised axial tomography) to peer inside the plaster cast moulds of Pompeii's victims, in a study that has added more detail to previous findings. A 16-layer scan had to be used in order to penetrate the hardened plaster but the results showed up impressive skeletal remains and near perfect teeth. Picture taken October 13, 2015. REUTERS/Alessandro Bianchi 

The plaster cast of a Pompeii victim is catalogued in a frescoed room in the ancient Roman city, Pompeii, October 13, 2015. An expert team made up of archaeologists, radiologists, orthodontists and anthropologists began on September 2015 to use CAT scan technology (computerised axial tomography) to peer inside the plaster cast moulds of Pompeii's victims, in a study that has added more detail to previous findings. A 16-layer scan had to be used in order to penetrate the hardened plaster but the results showed up impressive skeletal remains and near perfect teeth. Picture taken October 13, 2015. REUTERS/Alessandro Bianchi 

Elastic holds pieces of bone and plaster together after restoration work in the ancient Roman city, Pompeii, October 13, 2015. An expert team made up of archaeologists, radiologists, orthodontists and anthropologists began on September 2015 to use CAT scan technology (computerised axial tomography) to peer inside the plaster cast moulds of Pompeii's victims, in a study that has added more detail to previous findings. A 16-layer scan had to be used in order to penetrate the hardened plaster but the results showed up impressive skeletal remains and near perfect teeth. Picture taken October 13, 2015. REUTERS/Alessandro Bianchi 

Researchers carry the plaster cast mould of a Roman boy from an ancient Roman city as they prepare to run his body through a CAT (Computerised Axial Tomography) scan in Pompeii, September 29, 2015. An expert team made up of archaeologists, radiologists, orthodontists and anthropologists began on September 2015 to use CAT scan technology to peer inside the plaster cast moulds of Pompeii's victims, in a study that has added more detail to previous findings. A 16-layer scan had to be used in order to penetrate the hardened plaster but the results showed up impressive skeletal remains and near perfect teeth. Picture taken September 29, 2015. REUTERS/Ciro De Luca 

The plaster cast of a Pompeii victim lies in a frescoed room in the ancient Roman city, Pompeii, October 13, 2015. An expert team made up of archaeologists, radiologists, orthodontists and anthropologists began on September 2015 to use CAT scan technology (computerised axial tomography) to peer inside the plaster cast moulds of Pompeii's victims, in a study that has added more detail to previous findings. A 16-layer scan had to be used in order to penetrate the hardened plaster but the results showed up impressive skeletal remains and near perfect teeth. Picture taken October 13, 2015. REUTERS/Alessandro Bianchi 

The plaster cast of a Pompeii victim lies in a frescoed room in the ancient Roman city, Pompeii, October 13, 2015. An expert team made up of archaeologists, radiologists, orthodontists and anthropologists began on September 2015 to use CAT scan technology (computerised axial tomography) to peer inside the plaster cast moulds of Pompeii's victims, in a study that has added more detail to previous findings. A 16-layer scan had to be used in order to penetrate the hardened plaster but the results showed up impressive skeletal remains and near perfect teeth. Picture taken October 13, 2015. REUTERS/Alessandro Bianchi 

A restorer works to piece together fragments of bodies that have come away from plaster cast moulds of the victims of the Mount Vesuvius eruption in A.D. 79, which buried Pompeiii, October 13, 2015. An expert team made up of archaeologists, radiologists, orthodontists and anthropologists began on September 2015 to use CAT scan technology (computerised axial tomography) to peer inside the plaster cast moulds of Pompeii's victims, in a study that has added more detail to previous findings. A 16-layer scan had to be used in order to penetrate the hardened plaster but the results showed up impressive skeletal remains and near perfect teeth. Picture taken October 13, 2015. REUTERS/Alessandro Bianchi 

A plaster cast of a Pompeii victim lies in a frescoed room in the ancient Roman city, Pompeii, October 13, 2015. An expert team made up of archaeologists, radiologists, orthodontists and anthropologists began on September 2015 to use CAT scan technology (computerised axial tomography) to peer inside the plaster cast moulds of Pompeii's victims, in a study that has added more detail to previous findings. A 16-layer scan had to be used in order to penetrate the hardened plaster but the results showed up impressive skeletal remains and near perfect teeth. Picture taken October 13, 2015. REUTERS/Alessandro Bianchi 

Tourists look down an ancient Roman cobbled street at the UNESCO World Heritage site of Pompeii, October 13, 2015. An expert team made up of archaeologists, radiologists, orthodontists and anthropologists began on September 2015 to use CAT scan technology (computerised axial tomography) to peer inside the plaster cast moulds of Pompeii's victims, in a study that has added more detail to previous findings. A 16-layer scan had to be used in order to penetrate the hardened plaster but the results showed up impressive skeletal remains and near perfect teeth. Picture taken October 13, 2015. REUTERS/Alessandro Bianchi 

The[ plaster cast of a Pompeii victim lies in a frescoed room in the ancient Roman city, Pompeii, October 13, 2015. An expert team made up of archaeologists, radiologists, orthodontists and anthropologists began on September 2015 to use CAT scan technology (computerised axial tomography) to peer inside the plaster cast moulds of Pompeii's victims, in a study that has added more detail to previous findings. A 16-layer scan had to be used in order to penetrate the hardened plaster but the results showed up impressive skeletal remains and near perfect teeth. Picture taken October 13, 2015. REUTERS/Alessandro Bianchi 

A plaster cast mould of a boy from an ancient Roman city is studied through a CAT (Computerised Axial Tomography) scan in Pompeii, September 29, 2015. An expert team made up of archaeologists, radiologists, orthodontists and anthropologists began on September 2015 to use CAT scan technology to peer inside the plaster cast moulds of Pompeii's victims, in a study that has added more detail to previous findings. A 16-layer scan had to be used in order to penetrate the hardened plaster but the results showed up impressive skeletal remains and near perfect teeth. Picture taken September 29, 2015. REUTERS/Ciro De Luca 

Restorers work to piece together fragments of bodies that have come away from plaster cast moulds of the victims of the Mount Vesuvius eruption in A.D. 79, which buried Pompeii, October 13, 2015. An expert team made up of archaeologists, radiologists, orthodontists and anthropologists began on September 2015 to use CAT scan technology (computerised axial tomography) to peer inside the plaster cast moulds of Pompeii's victims, in a study that has added more detail to previous findings. A 16-layer scan had to be used in order to penetrate the hardened plaster but the results showed up impressive skeletal remains and near perfect teeth. Picture taken October 13, 2015. REUTERS/Alessandro Bianchi 

A restorer works to piece together fragments of bodies that have come away from plaster cast moulds of the victims of the Mount Vesuvius eruption in A.D. 79, which buried Pompeiii, October 13, 2015. An expert team made up of archaeologists, radiologists, orthodontists and anthropologists began on September 2015 to use CAT scan technology (computerised axial tomography) to peer inside the plaster cast moulds of Pompeii's victims, in a study that has added more detail to previous findings. A 16-layer scan had to be used in order to penetrate the hardened plaster but the results showed up impressive skeletal remains and near perfect teeth. Picture taken October 13, 2015. REUTERS/Alessandro Bianchi 

Researchers prepare the plaster cast mould of a Roman boy from an ancient Roman city as they put the body through a CAT (Computerised Axial Tomography) scan in Pompeii, September 29, 2015. An expert team made up of archaeologists, radiologists, orthodontists and anthropologists began on September 2015 to use CAT scan technology to peer inside the plaster cast moulds of Pompeii's victims, in a study that has added more detail to previous findings. A 16-layer scan had to be used in order to penetrate the hardened plaster but the results showed up impressive skeletal remains and near perfect teeth. Picture taken September 29, 2015. REUTERS/Ciro De Luca 

Plaster cast moulds of victims of the Mount Vesuvius eruption lie on a display table in a laboratory at Pompeii October 13, 2015. An expert team made up of archaeologists, radiologists, orthodontists and anthropologists began on September 2015 to use CAT scan technology (computerised axial tomography) to peer inside the plaster cast moulds of Pompeii's victims, in a study that has added more detail to previous findings. A 16-layer scan had to be used in order to penetrate the hardened plaster but the results showed up impressive skeletal remains and near perfect teeth. Picture taken October 13, 2015. REUTERS/Alessandro Bianchi TPX IMAGES OF THE DAY

University of Florida radiologist Keith Peters holds a fluid-filled pouch next to a replica human skull that, his research partner's tests show, protect the brain from shearing force of hits on helmets in their lab at the University of Florida in Gainesville, Florida, January 13, 2014. Subhash and Peters believe they have come up with a low-cost way to improve football helmets and better protect players against the glancing blows that experts say contribute to most concussions - fluid-filled pouches for football helmets to prevent concussions. REUTERS/Steve Johnson (UNITED STATES - Tags: EDUCATION HEALTH SPORT FOOTBALL SCIENCE TECHNOLOGY) 

A radiologist examines breast X-rays after a regular cancer prevention medical check-up at a radiology center in Nice, November 5, 2012. REUTERS/Eric Gaillard (FRANCE - Tags: HEALTH SCIENCE TECHNOLOGY) 

A radiologist examines breast X-rays after a regular cancer prevention medical check-up at a radiology center in Nice, November 5, 2012. REUTERS/Eric Gaillard (FRANCE - Tags: HEALTH SCIENCE TECHNOLOGY) 

A radiologist examines breast X-rays after a regular cancer prevention medical check-up at a radiology center in Nice, November 5, 2012. REUTERS/Eric Gaillard (FRANCE - Tags: HEALTH SCIENCE TECHNOLOGY) 

Haitian radiologist Dr. Reynold Savain looks through medical supplies on a landing at Centre Hospitalier du Sacre-Coeur, also known as CDTI, in downtown Port-au-Prince October 8, 2010. Time after time, Haiti has endured disaster followed by aid that did little to build long-term prosperity. The question is how to break the cycle and rebuild after the quake which killed at least a quarter of a million people and rendered more than a million homeless, leaving vast swathes of Port-au-Prince in ruins. On April 1, owner Savain was forced to close CDTI because neither the Haitian nor U.S. governments, nor the United Nations, would agree to help pay his bills. Picture taken October 8. To match Special Report HAITI/ REUTERS/Allison Shelley (HAITI - Tags: POLITICS DISASTER BUSINESS HEALTH) 

Haitian radiologist Dr. Reynold Savain looks through medical supplies on a landing at Centre Hospitalier du Sacre-Coeur, also known as CDTI, in downtown Port-au-Prince October 8, 2010. Time after time, Haiti has endured disaster followed by aid that did little to build long-term prosperity. The question is how to break the cycle and rebuild after the quake which killed at least a quarter of a million people and rendered more than a million homeless, leaving vast swathes of Port-au-Prince in ruins. On April 1, owner Savain was forced to close CDTI because neither the Haitian nor U.S. governments, nor the United Nations, would agree to help pay his bills. Picture taken October 8. To match Special Report HAITI/ REUTERS/Allison Shelley (HAITI - Tags: POLITICS DISASTER BUSINESS HEALTH) 

Radiologist Dr. Reynold Savain stands in the parking lot of Centre Hospitalier du Sacre-Coeur, also known as CDTI, in downtown Port-au-Prince October 8, 2010. Time after time, Haiti has endured disaster followed by aid that did little to build long-term prosperity. The question is how to break the cycle and rebuild after the quake which killed at least a quarter of a million people and rendered more than a million homeless, leaving vast swathes of Port-au-Prince in ruins. On April 1, owner Savain was forced to close CDTI because neither the Haitian nor U.S. governments, nor the United Nations, would agree to help pay his bills. Picture taken October 8. To match Special Report HAITI/ REUTERS/Allison Shelley (HAITI - Tags: SOCIETY POLITICS HEALTH) 

A radiologist covers the face of a cancer patient before operating a computerised linear accelerator machine for radiation treatment at the North Bengal Oncology Center, a cancer hospital, on the outskirts of the eastern Indian city of Siliguri February 25, 2009. REUTERS/Rupak De Chowdhuri (INDIA) 

Radiologists examine a cancer patient before operating a computerised linear accelerator machine for radiation treatment at the North Bengal Oncology Center, a cancer hospital, on the outskirts of the eastern Indian city of Siliguri February 25, 2009. REUTERS/Rupak De Chowdhuri (INDIA) 

A woman undergoes a mammography examination, an X-ray of the breasts used to detect tumours, as part of a regular cancer prevention medical check-up at the North Bengal Oncology Center, a cancer hospital, on the outskirts of the eastern Indian city of Siliguri February 25, 2009. REUTERS/Rupak De Chowdhuri (INDIA) 

A radiologist examines the brain X-rays of a patient who underwent a cancer prevention medical check-up at the North Bengal Oncology Center, a cancer hospital, on the outskirts of the eastern Indian city of Siliguri February 25, 2009. REUTERS/Rupak De Chowdhuri (INDIA) 

A radiologist prepares to study images from a magnetic resonance imaging (MRI) scanner at the Ambroise Pare hospital in Marseille, southern France, April 8, 2008. REUTERS/Jean-Paul Pelissier (FRANCE) 

A radiologist studies an image from a magnetic resonance imaging (MRI) scanner at the Ambroise Pare hospital in Marseille, southern France, April 8, 2008. REUTERS/Jean-Paul Pelissier (FRANCE) 

A radiologist studies an image from a magnetic resonance imaging (MRI) scanner at the Ambroise Pare hospital in Marseille, southern France, April 8, 2008. REUTERS/Jean-Paul Pelissier (FRANCE) 

A radiologist studies an image from a magnetic resonance imaging (MRI) scanner at the Ambroise Pare hospital in Marseille, southern France, April 8, 2008. REUTERS/Jean-Paul Pelissier (FRANCE) 

A radiologist examines X-rays of a patient at the Ambroise Pare hospital in Marseille, southern France, April 8, 2008. REUTERS/Jean-Paul Pelissier (FRANCE) 

Radiologists study an image from a magnetic resonance imaging (MRI) scanner at the Ambroise Pare hospital in Marseille, southern France, April 8, 2008. REUTERS/Jean-Paul Pelissier (FRANCE) 

A radiologist examines X-rays of a patient at the Ambroise Pare hospital in Marseille, southern France, April 8, 2008. REUTERS/Jean-Paul Pelissier (FRANCE) 

A radiologist examines X-rays of a patient at the Ambroise Pare hospital in Marseille, southern France, April 8, 2008. REUTERS/Jean-Paul Pelissier (FRANCE) 

A radiologist examines X-rays of a patient at the Ambroise Pare hospital in Marseille, southern France, April 8, 2008. REUTERS/Jean-Paul Pelissier (FRANCE) 

A radiologist examines X-rays of a patient at the Ambroise Pare hospital in Marseille, southern France, April 8, 2008. REUTERS/Jean-Paul Pelissier (FRANCE) 

A radiologist examines X-rays of a patient at the Ambroise Pare hospital in Marseille, southern France, April 8, 2008. REUTERS/Jean-Paul Pelissier (FRANCE) 

A radiologist examines breast X-rays after a cancer prevention medical check-up at the Ambroise Pare hospital in Marseille, southern France, on April 3, 2008. REUTERS/Jean-Paul Pelissier (FRANCE) 

Radiologist Maximilian Reiser (R) and nuclear physician Klaus Tatsch operate on a cancer patient by the new radiation treatment for liver tumours called Selective Internal Radiation Therapy (SIRT) in Munich's university hospital, October 17, 2006. SIRT targets a very high radiation dose to tumours within the liver, regardless of their cell of origin, number, size or location. The spheres are implanted using a catheter placed in the artery feeding the liver and travel via the blood stream, where the spheres are targeted to the tumours within the liver. REUTERS/Alexandra Beier (GERMANY) 

Radiologist Maximilian Reiser (R) and nuclear physician Klaus Tatsch operate on a cancer patient by the new radiation treatment for liver tumours called Selective Internal Radiation Therapy (SIRT) in Munich's university hospital, October 17, 2006. SIRT targets a very high radiation dose to tumours within the liver, regardless of their cell of origin, number, size or location. The spheres are implanted using a catheter placed in the artery feeding the liver and travel via the blood stream, where the spheres are targeted to the tumours within the liver. REUTERS/Alexandra Beier (GERMANY) 

Radiologists Christoph Timm (L) and Maximilian Reiser operate on a cancer patient with the new radiation treatment for liver tumours, called Selective Internal Radiation Therapy (SIRT) in Munich's university hospital, October 17, 2006. SIRT targets a very high radiation dose to tumours within the liver, regardless of their cell of origin, number, size or location. The spheres are implanted using a catheter placed in the artery feeding the liver and travel via the blood stream, where the spheres are targeted to the tumours within the liver. REUTERS/Alexandra Beier (GERMANY) 

Radiologist Shoji Kurashima (C) from Tokyo checks the leg of an injured woman inside a clinic tent in Bantul, near the Indonesian city of earthquake-hit Yogyakarta, June 2, 2006. REUTERS/Crack Palinggi (INDONESIA)