A research team at the Physics for Medicine Institute (Inserm/ESPCI Paris-PSL/CNRS) has achieved a significant milestone in diagnostic technology. For the first time, scientists have successfully mapped the blood flow of entire organs in animal models using a new type of 4D ultrasound probe. This breakthrough provides high-precision visualization of the heart, kidney, and liver in four dimensions: 3D plus time.
When transitioned to clinical use in humans, this technology is expected to deepen our understanding of the circulatory and lymphatic systems. It could also lead to more effective diagnoses for various diseases linked to blood circulation.
The Challenge of Visualizing Microcirculation
Blood microcirculation is the intricate network of tiny vessels that delivers oxygen and nutrients to tissues while removing metabolic waste. Proper function is essential for cellular health.
Until now, medical professionals have lacked an imaging method capable of visualizing the entire circulatory system at the organ level. Current limitations prevent the assessment of everything from large arteries down to the finest arterioles simultaneously. Alterations in these microvascular networks are serious, often leading to:
- Heart failure
- Kidney failure
- Various chronic diseases
Unprecedented 4D Resolution
Developed as part of Nabil Haidour’s thesis work under the supervision of Inserm researcher Clément Papadacci, this new probe distinguishes microcirculation even in vessels smaller than 100 micrometers.
In animal models similar in size to humans, the researchers were able to quantify blood flow dynamics with unprecedented resolution. For example, in the liver, the device successfully identified and differentiated three distinct blood networks—arterial, venous, and portal—by analyzing their unique hemodynamic signatures.
Future Clinical Application and Human Trials
The next phase for this technology involves human clinical trials. Developments for human use are currently being managed by the Technological Research Accelerator for Biomedical Ultrasound.
According to Clément Papadacci, the probe is designed to be compatible with small, portable equipment. This portability makes it ideal for integration into standard medical practice. Potential clinical benefits include:
- Improving the diagnosis of complex microcirculation disorders
- Enhancing the monitoring of treatments for small vessel diseases
- Providing a comprehensive view of vascular dynamics from major vessels to pre-capillary arterioles
Currently, many small vessel diseases are difficult to identify and are often diagnosed only by ruling out other conditions. This 4D imaging tool could move medicine toward more direct and timely diagnostic solutions.
Detailed Research Information
For medical professionals and researchers interested in the technical specifications and multi-lens ultrasound arrays used in this study, the full report is available via the link below:
