Healthcare · Diagnostics
The Evolution of Diagnostics
From Röntgen's first X-ray in 1895 to AI systems reading medical scans in 2026 — a timeline of how humanity learned to see inside the body, decode diseases at the molecular level, and now let machines assist with diagnosis. Every milestone sourced.
Automation Progress
Technology Readiness
Lab
Pilot
Commercial
Mature
Task Automation Rate
~10% of human tasks in this field
People Affected
~15M diagnostic professionals worldwide
Growth Momentum
~30% CAGR AI diagnostics market 2024–2030
FDA-Authorized AI/ML Medical Devices
1,451
Cumulative AI/ML-enabled medical devices authorized by the U.S. FDA through end of 2025 — up from just 6 in 2015.
A record 295 new devices were cleared in 2025 alone.
Source: IntuitionLabs — FDA AI Medical Device Tracker (updated Mar 2026);
FDA official AI device list
~$106 billion
Global IVD Market (2025)
The global in-vitro diagnostics market was valued at ~$105.7 B in 2024 and projected to reach ~$108.6 B in 2025, growing steadily at ~5% CAGR. This excludes imaging hardware and AI software markets.
AI Devices in Radiology
76% of total
1,104 of 1,451 FDA-authorized AI medical devices are in radiology. Medical imaging remains the dominant application
area, reflecting deep learning's natural fit for image-based diagnostics.
Source: IntuitionLabs — FDA AI Medical Device Tracker (through 2025)
First AI Foundation Model for Clinical Use
2025
In February 2025, Aidoc's CARE1™ became the first clinical AI foundation model to receive FDA clearance,
marking a paradigm shift from single-task AI to generalizable medical AI systems.
Diagnostic Milestones — 130 Years of Progress
Classical Era
Imaging Revolution
Molecular & Genomic
AI Era
1895
X-Ray Discovered — Wilhelm Röntgen
The first medical X-ray image (Mrs. Röntgen's hand) opened the era of non-invasive imaging. Röntgen received the first Nobel Prize in Physics in 1901.
1903
Electrocardiograph (ECG) — Willem Einthoven
Einthoven developed the string galvanometer ECG, enabling electrical recording of heart activity. He received the Nobel Prize in 1924.
1928
Pap Smear — Georgios Papanicolaou
The Pap smear test for cervical cancer screening became one of the most successful screening programs in medical history, dramatically reducing cervical cancer mortality.
Source: PMC — Medical Imaging Review
1958
Medical Ultrasound — Ian Donald
Ian Donald published the first paper on diagnostic ultrasound in obstetrics in The Lancet, launching a radiation-free imaging modality now used billions of times annually.
1971
CT Scanner — Godfrey Hounsfield
The first clinical CT scan was performed at Atkinson Morley Hospital, London. CT revolutionized diagnostics by providing cross-sectional images of the body. Hounsfield shared the 1979 Nobel Prize.
1977
MRI — Raymond Damadian & Paul Lauterbur
The first full-body MRI scan was completed. MRI provides detailed soft-tissue images without ionizing radiation. Lauterbur and Mansfield received the 2003 Nobel Prize.
1991
PET/CT Fusion Imaging
The combination of PET (metabolic function) with CT (anatomy) created the most powerful cancer staging tool. Today PET/CT is standard for oncology diagnostics worldwide.
1983
PCR Invented — Kary Mullis
The polymerase chain reaction (PCR) enabled amplification of tiny DNA samples, transforming infectious disease diagnostics, forensics, and genetic testing. Mullis received the 1993 Nobel Prize.
1995
First AI Medical Device — PAPNET (FDA)
PAPNET, an automated cytology screening system for Pap smears, became the first AI/ML-enabled medical device to receive FDA authorization — 30 years before the AI explosion.
2003
Human Genome Project Completed
The $2.7 billion, 13-year project decoded 3 billion DNA base pairs, launching the era of genomic medicine. Today whole-genome sequencing costs ~$200 and takes hours.
Source: NIH — Human Genome Project
2014
Liquid Biopsy — FDA Approval of First ctDNA Test
The first FDA-approved liquid biopsy (Roche's cobas EGFR Mutation Test v2) detected cancer mutations from a simple blood draw, opening a new frontier in non-invasive cancer diagnostics.
2018
IDx-DR — First Autonomous AI Diagnostic (FDA)
IDx-DR became the first FDA-authorized AI system that could make a diagnosis (diabetic retinopathy) without physician interpretation — a landmark for autonomous medical AI.
2020
COVID-19 RT-PCR Diagnostics — Global Ramp-up
The pandemic triggered unprecedented scale-up of molecular diagnostics. PCR testing capacity grew from near-zero to billions of tests per year worldwide, and mRNA vaccine development relied on rapid genomic sequencing.
2023
221 AI Medical Devices Cleared by FDA in One Year
The FDA authorized 221 AI/ML medical devices in 2023, a 143% jump from 91 in 2022 — marking the inflection point for AI diagnostics entering mainstream healthcare.
Source: FDA — AI-Enabled Medical Devices
2025
295 AI Devices — Record Year; First Foundation Model Cleared
The FDA authorized a record 295 AI/ML devices in 2025. Aidoc's CARE1™ became the first clinical AI foundation model cleared by the FDA. 10% of new clearances included pre-determined change control plans (PCCP) for continuous algorithm updates.
FDA AI/ML Medical Device Authorizations by Year
Annual count of new AI/ML-enabled medical devices authorized by the U.S. FDA. Data from FDA's official AI-enabled device list and third-party trackers.
| Year | Devices Authorized | YoY Change | Source |
|---|---|---|---|
| 2025 | 295 | +16.6% | Innolitics 2025 Year in Review |
| 2024 | 253 | +14.5% | IntuitionLabs |
| 2023 | 221 | +142.9% | FDA AI Device List |
| 2022 | 91 | — | MDPI Electronics (2024) |
| 2015 | 6 | — | IntuitionLabs |
FDA AI Devices by Medical Specialty (through 2025)
76%
Radiology
1,104 devices
9%
Cardiovascular
~130 devices
5%
Neurology
~68 devices
10%
Other
~149 devices
Top AI Medical Device Manufacturers (Cumulative FDA Authorizations)
Ranked by total number of FDA-authorized AI/ML-enabled medical devices through 2025. Source: IntuitionLabs