Scientists at Caltech and the University of Southern California have developed a powerful new medical imaging technique that could change the way doctors detect and study disease. The new system can quickly create full-color, 3D images of the human body that show both the structure of soft tissues and how blood vessels are functioning — all in a single scan.
That combination is what makes this breakthrough so important. Most current imaging tools can do one or the other, but not both at once.
Ultrasound is fast and affordable, but it mainly shows shape and structure. Photoacoustic imaging, which uses laser light and sound waves, can reveal what is happening inside blood vessels, such as blood flow and oxygen levels, but it lacks detailed structural views. Other technologies like CT scans and MRIs can be expensive, slow, or require radiation or contrast dyes.
The new technique, called RUS-PAT, merges the strengths of ultrasound and photoacoustic imaging into one streamlined system. The name RUS-PAT comes from “Rotational UltraSound” and “PhotoAcoustic Tomography,” describing how the system combines rotating ultrasound sensors with laser-based photoacoustic imaging to capture both the body’s structure and real-time blood-vessel activity in one scan.
It uses a laser and rotating ultrasound sensors to scan the body and build detailed 3D color images in under a minute. The design allows a small number of detectors to work together like a much larger, more complex machine — helping keep the system more practical and affordable.
Unlike many experimental technologies, RUS-PAT has already been tested on human volunteers and patients, successfully imaging multiple parts of the body.
Researchers believe this system could dramatically improve several areas of medicine. It could enhance breast tumor imaging, allowing doctors to see a tumor’s exact location, structure, and surrounding tissue while also revealing blood-vessel activity that may indicate how aggressive it is. It may also help doctors monitor nerve damage caused by diabetes by showing both tissue condition and oxygen supply. In brain imaging, the technology could allow scientists to observe detailed brain structures while simultaneously tracking blood flow.
Currently, the system can image up to about four centimeters deep, but the team says deeper areas could be reached using light delivered through tiny scopes similar to those used in endoscopic procedures.
The scanning system is built beneath a bed, with patients lying comfortably on top while the device performs the scan.
Researchers say the real power of RUS-PAT is that it doesn’t just show what the body looks like — it shows what it’s doing. By capturing both structure and function in one fast, noninvasive scan, the technology could offer doctors a safer, faster, and far more complete view inside the human body.
