Ultrasound’s Next Leap: The Importance of Transducer Innovation
- Feb 24
- 2 min read
Ultrasound remains one of the most widely used imaging modalities in medicine. It’s real-time, radiation-free, and comparatively cost-effective. Yet as clinical expectations rise, innovation pressure across the entire ultrasound stack, from software to sensors, has been squeezed as well.
Indeed major vendors are pushing the boundaries of diagnostic performance and efficiency. At the 2025 Radiological Society of North America (RSNA) meeting, we’ve seen many companies unveiling new AI-powered ultrasound systems designed to elevate image precision and workflow automation, signaling a renewed emphasis on performance and clinical utility.
Other research initiatives focus on wearable and continuous ultrasound monitoring which has the benefit of moving beyond traditional clinical environments, with projects developed to enable real-time imaging for chronic conditions such as heart failure, underscoring demand for devices that are portable, compact, robust, and cost-efficient.
In this broader context, the transducer, the physical interface between sound and tissue, remains a crucial frontier for innovation.
Why Transducer Technology Still Limits the Next Generation
Despite rapid advances in software and beamforming algorithms, the physical transducer has evolved more gradually. Piezoelectric (PZT) arrays continue to dominate clinical imaging and remain highly effective, but scaling toward dense 2D matrix formats for real-time volumetric imaging introduces routing and packaging complexity that traditional approaches struggle to address.
Capacitive micromachined ultrasound transducers (CMUTs) showed promise by using semiconductor fabrication techniques on silicon. Yet silicon substrates impose limitations: rigid materials, delicate manufacturing, and costly environment-controlled processes with wirebonding or through-silicon vias (TSVs) that constrain miniaturization and supply chain flexibility.
A PCB & Polymer-Powered Approach
A truly disruptive direction is emerging: polymer-based CMUTs (polyCMUTs) fabricated directly on printed circuit boards (PCBs). This approach aligns transducer manufacturing with mature, high-volume electronics infrastructure and supports denser routing, shorter interconnects, and broader design flexibility, all without the need for wirebonding and no inherent loss in imaging performance when array geometry is preserved.
Our polymer-enabled transducers replace rigid silicon drums with engineered polymer membranes compatible with PCB substrates.
“Transducer drums have typically been made out of rigid silicon materials that require costly, environment-controlled manufacturing processes, and this has hampered their use in ultrasound. By using polymer resin, we are able to produce polyCMUTs in fewer fabrication steps, using a minimum amount of equipment, resulting in significant cost savings and unique capabilities,” said Dr. Robert Rohling, UBC Professor, Medical Ultrasound.
Truly, this is the economic and practical motivation behind moving beyond silicon: fewer fabrication steps, lower equipment barriers, and a closer alignment with globally distributed PCB manufacturing.
Today’s ultrasound innovation involves advanced AI and automation, wearable imaging research, and hardware enhancements that make next-generation capabilities practical and affordable.
PCB-based polyCMUT transducers represent a structural enabler that aligns hardware capability with expanding clinical demands. In an era where healthcare systems seek portability, cost control, and rapid iteration, rethinking transducer substrates could prove as consequential as advances in software and AI and may finally unlock the hardware flexibility required for truly next-generation ultrasound systems.