In December 1991, on a blustery winter day in Bethesda, Maryland, we captured the world’s first 3D ultrasound image of a living fetus. It didn’t happen in a fancy startup lab or with a massive grant. It happened with a standard 2D ultrasound machine, a home-built probe slider, a VHS deck, and a lot of persistence.
How the Idea Took Shape
At the time, conventional ultrasound produced 2D “slices”—images refreshed 20–50 times per second. If those slices could be gathered in a controlled sweep and then digitally stacked, I believed we could render a true 3D volume—like assembling a loaf from its slices.
To test the idea, I needed four things:
- Access to a 2D ultrasound machine
- A volunteer (my wife, 20 weeks pregnant with our first child)
- A precise linear motion device to move the probe at a constant rate
- Software capable of capturing frames and rendering them into 3D
A Basement Build, a Hardware Store, and NIH Image
The motion device came together in my basement in about a week: a cordless screwdriver, a threaded dowel, and a lab clamp from Hechinger’s Hardware—basic, reliable, and controllable.
The software side came from NIH. I met Dr. Wayne Rasband, the creator of NIH Image (now ImageJ), a general-purpose image processing toolkit then used mostly for microscopy. With a few tweaks, we could ingest frames from VHS, stack them, and attempt a 3D reconstruction.
With help from the chief of radiology, we used the Acuson 128 in the basement of Building 12. We recorded slow, even sweeps across my wife’s abdomen, capturing those crucial 2D frames—our “slices.”
December 19, 1991: First 3D Ultrasound of a Living Fetus
Ninety minutes after the capture, the render finished. On the monitor appeared a rotating 3D image of our baby—a living fetus, visualized volumetrically for the first time. It was breathtaking, humbling, and a testament to what practical ingenuity plus collaboration can do.
Sharing It With the World
On March 15, 1993, at the 37th Annual Scientific Meeting of the American Institute of Ultrasound in Medicine in Honolulu, I pressed “play.” As the 3D volume rotated on-screen, the room gasped. That moment led to awards, recognition, and a $5 million grant to continue the research.
As a U.S. Army second lieutenant and a government employee, there was no patent windfall—and that was fine. What it gave me was the chance to keep exploring and the quiet satisfaction of knowing our family not only welcomed a son but also helped spark a scientific shift in how we view the unborn.
Why 3D Matters (Then and Now)
- Better spatial understanding: 3D helps clinicians and parents interpret anatomy that’s hard to visualize in flat slices.
- Enhanced counseling: Volumes and surface renderings support conversations about fetal development and potential concerns.
- Foundation for 4D: Once you can render in 3D, adding time (motion) yields 4D ultrasound, now common in modern obstetric imaging.
Note: Marketing terms like “5D” or “HD-live” usually refer to rendering presets and lighting/shading algorithms layered on 3D/4D data. The clinical core remains 2D acquisition paired with 3D/4D reconstruction.
What Patients Can Expect at Lancaster MFM
Today at Lancaster MFM, 3D/4D imaging is integrated into comprehensive obstetric ultrasound when clinically appropriate. Our registered sonographers focus on diagnostic quality first, with 3D views added to clarify anatomy or enhance understanding when it benefits care.
Examples from our practice:
- First-trimester fetus — early structural overview and reassuring visualization for families
- Third-trimester fetus — face and extremity surface renderings when position and fluid allow
(Images displayed in clinic; quality varies with fetal position, amniotic fluid, gestational age, and maternal factors.)
For a deeper dive into timing and types of scans, see Ultrasound: How, When and Why.
A Word on Safety and “Keepsake” Ultrasounds
Ultrasound is considered safe when used appropriately by qualified professionals and as little as reasonably achievable to answer a clinical question. That’s why LMFM does not recommend non-medical “keepsake” ultrasound boutiques. These sessions may prolong exposure without clinical oversight or distract from necessary diagnostic goals.
A concise summary of the FDA’s stance is here: The Atlantic coverage of the 2014 FDA consumer guidance. (Ask your provider if you have safety questions—we’re happy to explain how we optimize settings and exposure.)
Frequently Asked Questions
Is 3D always possible?
Not always. Image quality depends on fetal position, movement, fluid volume, placental location, and maternal tissue characteristics. We prioritize diagnostic views; 3D is performed when it will add clarity.
Do 3D/4D scans replace standard ultrasounds?
No. 2D ultrasound remains the diagnostic workhorse. 3D/4D are complementary tools.
Can I book a 3D scan just for photos?
We don’t offer non-medical “photo sessions.” If you’re hoping for keepsake images, talk to your sonographer—when clinically appropriate, we do our best to capture meaningful views during your medically indicated exam.
About the Author
Christian Macedonia, MD is a pioneer in 3D obstetric ultrasound and a maternal–fetal medicine specialist. His early NIH-collaborative work with NIH Image / ImageJ helped usher real-time volumetric fetal imaging into clinical practice.
