The Scottish Invention That Let Humanity See Inside the Womb

Introduction

In a 1950s Glasgow hospital, three men — an obstetrician, a young engineer and a clinical registrar — borrowed an industrial machine designed to find cracks in ship's steel and used it to look inside a living human body. The result was diagnostic medical ultrasound: a safe, radiation-free way of seeing organs, tumours and unborn babies that today underpins billions of medical examinations around the world.

This is the story of Professor Ian Donald, engineer Tom Brown and clinician Dr John MacVicar — the team at the University of Glasgow and the Western Infirmary who, between 1955 and 1958, turned a Kelvin & Hughes ultrasonic flaw-detector into the world's first practical diagnostic ultrasound scanner. Their landmark paper in The Lancet on 7 June 1958 is widely regarded as one of the most important publications in the history of medical imaging, and Glasgow is rightly remembered as the birthplace of obstetric ultrasound — a quiet but world-changing example of Scottish ingenuity.

Who Was Ian Donald?

Professor Ian Donald (1910–1987) was, in his pomp, one of Britain's most respected obstetricians. Contrary to a stubborn myth, he was not born in Scotland. The University of Glasgow's own biographical record and the Royal College of Physicians' obituary both place his birth in Liskeard, Cornwall, on 27 December 1910. He came, however, from a thoroughly Scottish line — the third generation of doctors in a family rooted in Paisley.

Donald was educated at Warriston School in Moffat, Fettes College in Edinburgh, and (after a family move to South Africa) the Diocesan College in Rondebosch and the University of Cape Town. He took his medical degree at St Thomas's Hospital Medical School in London, qualifying in 1937. During the Second World War he served as a Royal Air Force medical officer, was mentioned in dispatches and awarded a military MBE for pulling airmen from a crashed bomber. Crucially, his wartime exposure to RAF radar and sonar lodged in his mind: he later wrote that he arrived in Glasgow with "a rudimentary knowledge of radar from my days in the RAF and a continuing childish interest in machines."

He was eccentric, brilliant, devout and obstinate — a gifted teacher, a sailor who built his own boats, and a watercolourist. In 1954 he was appointed Regius Professor of Midwifery at the University of Glasgow, a Crown appointment, and made the building of a new maternity hospital a condition of taking the chair.

Why Medicine Needed Ultrasound

In the 1950s the inside of the pregnant or diseased abdomen was effectively invisible without surgery. Was a swelling a harmless cyst full of fluid, or a solid, deadly tumour? Was the placenta lying dangerously low across the cervix? How big was the foetus, and was it growing? Doctors answered these questions with palpating hands, clinical intuition and guesswork.

X-rays could show the foetal skeleton late in pregnancy but carried the danger of ionising radiation to mother and unborn child. Medicine badly needed a way to see inside the living body that was safe, repeatable and non-invasive. Donald saw the answer in the engineering yards of the Clyde.

The Glasgow Breakthrough

Donald's insight was to borrow from heavy industry. Ultrasonic flaw-detectors were already used in Clyde shipyards and boiler works to find cracks in welds and steel plates. If sound echoes could distinguish a flaw in metal, might they distinguish a cyst from a tumour in flesh?

The opening came through one of Donald's patients, whose husband was a director at Babcock & Wilcox, the boiler-makers at Renfrew on the Clyde. He invited the obstetrician to come and try the firm's industrial ultrasonic flaw-detector — and that single visit would change medicine.

The Famous Steak Experiment

On 21 July 1955 Donald arrived at the Babcock & Wilcox plant carrying fibroids and a large ovarian cyst removed from his patients that morning. A technician, Bernard Donnelly, demonstrated the Kelvin & Hughes flaw-detector by bouncing the beam off the bone of his own thumb. Donald then tested his specimens — and, in the now-famous detail, a large piece of butcher's steak supplied as a control.

The results, he later wrote, "were beyond my wildest dreams": a fluid-filled cyst produced echoes only from its near and far walls, while a solid tumour attenuated the echoes progressively with depth. Donald could tell them apart. Sound had entered medicine.

Building the First Practical Ultrasound Scanner

The decisive partnership came in late 1956, when Tom Brown, a 23-year-old research engineer at the Glasgow scientific-instruments firm Kelvin & Hughes, heard that an obstetrician was using one of the firm's flaw-detectors and sought Donald out. Brown's engineering genius transformed the project. With Brown and Donald's registrar John MacVicar, the team built the world's first two-dimensional contact compound scanner — a "bed-table" machine cobbled together from a Mark IV flaw-detector, a cathode-ray tube, an old hospital bed, and Meccano chains and sprockets. Brown was named as inventor on the resulting Kelvin & Hughes patent.

The first commercial machine that grew from this work was christened the Diasonograph, refined with industrial designer Dugald Cameron of the Glasgow School of Art and built at Kelvin & Hughes' Hillington works around 1963–64. So large and heavy was it — about one ton (1,016 kg) — that hospital staff nicknamed it the "Dinosaurograph."

The 1958 Lancet Paper

"Investigation of Abdominal Masses by Pulsed Ultrasound" — Ian Donald, J. MacVicar and T. G. Brown. The Lancet, 7 June 1958, vol. 271, no. 7032, pp. 1188–1195.

In more than nine pages the paper described the experience of 100 patients, with 12 B-mode illustrations of the gravid uterus, ovarian cysts, fibroids and ascites — including the first published ultrasound image of a foetus. It has been described as "probably the most important paper on medical diagnostic ultrasound ever published" and is freely cited at The Lancet.

How Ultrasound Works

1. Transducer emits sound waves. A probe pressed against the skin sends harmless, high-frequency sound pulses into the body.
2. Sound travels through tissues. The waves pass through skin, fat and fluid on their way to deeper structures.
3. Echoes are reflected back. When sound waves cross a boundary between different tissues (e.g. fluid and solid), some of the sound bounces back as an echo.
4. Echoes return to the transducer. The probe detects the returning echoes and measures how long they took to return.
5. The computer builds the image. Echo timing is converted to distance, echo strength to brightness, and a real-time image appears on the monitor.

Early Medical Success Stories

The turning point came in 1957. A woman with a hugely swollen abdomen had been diagnosed by the Regius Professor of Medicine as having ascites from inoperable, terminal cancer. As Donald scanned her, MacVicar — peering over his shoulder — remarked that the trace looked like an ovarian cyst. A laparotomy proved them right: it was a large, benign ovarian cyst, which was removed, and the patient lived. "From this point," Donald later wrote, "there could be no turning back."

The applications multiplied with remarkable speed:

• Distinguishing fluid-filled ovarian cysts from solid fibroids and tumours.
• Locating the placenta and transforming the management of placenta praevia.
• Measuring the foetal head — the biparietal diameter (BPD) — to better than 2 mm, founding modern foetal biometry. This was the work of Donald's colleague James Willocks with engineer Tom Duggan.
• Detecting the foetal heartbeat and diagnosing early and multiple pregnancy.
• In later decades: real-time scanning, Doppler blood-flow imaging, and 3D/4D scanning.

Tom Brown: The Forgotten Engineering Genius

Donald supplied the clinical vision, the patients and the relentless drive. Tom Brown supplied the engineering that made a working scanner possible, and was the named inventor on the Kelvin & Hughes patent. Just 23 when he joined Donald in 1956, Brown designed the contact compound scanner, solved the geometry of moving the probe in a single plane and built the bed-table rig from industrial components and Meccano. The two were jointly made the first Honorary Members of the British Medical Ultrasound Society in 1984 — a recognition that has, in the years since, too often been quietly forgotten by histories that name only Donald. A complete telling of this Scottish triumph names the partnership.

John MacVicar's Role

Dr John MacVicar was Donald's clinical registrar at the Western Infirmary. He joined the project in 1956, performed many of the early scans alongside Donald, and was a named co-author of the 1958 Lancet paper. In the cancer-versus-cyst case described above it was MacVicar who first whispered the correct diagnosis. As clinical voice on a paper otherwise dominated by an obstetrician and an engineer, he is the third indispensable name on the credit line.

The Queen Mother's Hospital

Donald had made a new maternity hospital a condition of his Regius chair. The Queen Mother's Hospital at Yorkhill in Glasgow — which he campaigned for and helped design — opened on 11 January 1964 and quickly became a place of pilgrimage for ultrasound researchers from around the world. For three decades, every serious obstetric ultrasonographer in the world expected to spend some time in Glasgow.

Global Impact of Ultrasound

Ultrasound is now among the most widely used medical imaging technologies on Earth — safe (no ionising radiation), comparatively cheap, portable and astonishingly versatile. Its uses reach far beyond obstetrics: echocardiography, abdominal and vascular scanning, musculoskeletal imaging, needle-guided procedures, and point-of-care ultrasound in A&E and intensive care.

The World Health Organization has estimated that some 3.6 billion diagnostic imaging examinations of all kinds are performed globally each year, with ultrasound among the most frequently used modalities. The global ultrasound market itself was valued at about USD 10.06 billion in 2024 and is projected to roughly double, to around USD 20.21 billion by 2034, according to industry analysts at Precedence Research.

Controversies and Ethical Debates

A proud account must also be an honest one. Donald was a passionate, public opponent of abortion, and his greatest invention became a tool in that cause. The same images that let clinicians diagnose disease also, for the first time, let the public "see" the unborn child — and Donald used them deliberately. He showed his ultrasound film at anti-abortion meetings and was granted an audience with Pope John Paul II that he called "the crowning event of my life."

Accuracy matters here: the Society for the Protection of Unborn Children (SPUC) was conceived in 1966 and formally founded on 11 January 1967, in response to David Steel MP's abortion bill. Ian Donald was one of fifteen people elected to SPUC's founding executive committee — a founding member lending his prominence — rather than its originator. It is fair to record that his medical invention had profound political consequences that he actively shaped, in a direction that remains deeply contested.

Legacy and Recognition

Donald received the Eardley Holland and Blair Bell gold medals, the Victor Bonney Prize, honorary doctorates from London (1981) and Glasgow (1983), and a CBE in 1973. (He was never knighted; references to "Sir Ian Donald" are an error.) He suffered lifelong heart disease and endured three major cardiac operations. He died on 19 June 1987 at Paglesham, Essex, and is buried there; his headstone reads "pioneer of medical ultrasound."

His name lives on in the Ian Donald Inter-University School of Medical Ultrasound, founded in his honour in Dubrovnik in 1981 (first course 1982), and in the Donald School Journal of Ultrasound in Obstetrics and Gynecology. The British Medical Ultrasound Society (BMUS) continues to honour both Donald and Brown as its first honorary members.

Timeline of Ultrasound Development

1. 1955

   The Babcock & Wilcox experiment

   On 21 July 1955 Ian Donald tests freshly excised tumours, ovarian cysts and a piece of butcher's steak against a Kelvin & Hughes ultrasonic flaw-detector at Renfrew.

2. 1956

   Tom Brown joins

   23-year-old Kelvin & Hughes engineer Tom Brown seeks Donald out; Dr John MacVicar joins as Donald's registrar. The Glasgow team is complete.

3. 1957

   A life saved

   A woman written off with 'inoperable' terminal cancer is scanned in Glasgow. The trace reveals a benign ovarian cyst. Surgery saves her life and turns scepticism into acceptance.

4. 1958

   The Lancet paper

   Donald, MacVicar and Brown publish 'Investigation of Abdominal Masses by Pulsed Ultrasound' in The Lancet on 7 June, including the first published ultrasound image of a foetus.

5. 1964

   Queen Mother's Hospital

   The Queen Mother's Hospital at Yorkhill in Glasgow — campaigned for by Donald — opens on 11 January and becomes a global pilgrimage site for ultrasound research.

6. 1984

   BMUS Honorary Members

   Donald and Brown are jointly made the first Honorary Members of the British Medical Ultrasound Society.

7. 1987

   Death of a pioneer

   Ian Donald dies on 19 June at Paglesham, Essex, after three major cardiac operations. His headstone reads 'pioneer of medical ultrasound.'

Did You Know?

• Donald's first tissue test compared excised fibroids and a cyst against a slab of butcher's steak as a control.
• The first practical Glasgow scanner was partly assembled from Meccano chains and sprockets.
• The first commercial Diasonograph weighed about a ton — staff nicknamed it the 'Dinosaurograph.'
• Donald's idea of 'seeing with sound' came directly from his wartime work on RAF radar and sonar.
• The 1958 Lancet paper has been called 'probably the most important paper on medical diagnostic ultrasound ever published.'
• Tom Brown was only 23 when he joined the project — and is named as inventor on the original patent.
• Ian Donald was born in Cornwall, not Scotland, but his entire pioneering work was done in Glasgow.
• Donald received a CBE in 1973 — he was never knighted, despite occasional references to 'Sir Ian Donald.'
• Modern foetal biometry — measuring the baby's biparietal diameter — began with Donald's Glasgow colleague James Willocks.
• The Ian Donald Inter-University School of Medical Ultrasound was founded in Dubrovnik in 1981 and is still teaching today.

Frequently Asked Questions

Sources & Further Reading

• Donald, I., MacVicar, J. & Brown, T. G. "Investigation of Abdominal Masses by Pulsed Ultrasound." The Lancet, 7 June 1958. thelancet.com
• Royal College of Physicians of London — Ian Donald obituary. history.rcplondon.ac.uk
• University of Glasgow — Ian Donald biographical entry. gla.ac.uk
• British Medical Ultrasound Society (BMUS) — history of medical ultrasound. bmus.org
• Nicolson, M. & Fleming, J. E. E. Imaging and Imagining the Fetus: The Development of Obstetric Ultrasound. Johns Hopkins University Press, 2013.