The 3D-printed polyamide housing acts as the critical structural interface that unifies the device's acoustic and optical systems into a single, precise instrument. Beyond simple containment, it enables the creation of complex internal geometries—such as water chambers and optical channels—that align the ultrasound beam directly with a camera for real-time visual monitoring.
Core Takeaway By leveraging additive manufacturing with polyamide, engineers can integrate internal fluid and optical paths that traditional machining cannot easily achieve. This ensures strict coaxial alignment between the ultrasound focus and the user's line of sight, guaranteeing that what the operator sees is exactly what they are treating.
Engineering Precision and Design Flexibility
Enabling Complex Internal Geometries
The primary technical advantage of using a 3D-printed housing is the ability to fabricate complex internal structures as a single unit.
Standard manufacturing methods often require assembling multiple parts to create internal voids. 3D printing allows for the direct integration of essential features, such as internal water chambers, within the housing walls themselves.
Robust Structural Support
Polyamide is selected for its material properties, providing robust structural support for the delicate internal components.
This rigidity is essential for protecting the electronics and acoustic elements during operation. It ensures that the device maintains its physical integrity even when subjected to the vibrations and handling inherent in clinical environments.
The Critical Role of Coaxial Alignment
Synchronizing Sound and Vision
The most sophisticated function of the housing is ensuring high coaxial alignment between the acoustic main axis and the optical observation axis.
In high-frequency ultrasound systems, the energy is focused on a specific point. The housing is designed so that the integrated optical channels point the camera at this exact same location.
Real-Time Precision Monitoring
Because the housing locks the acoustic and optical paths into alignment, operators can achieve real-time observation of the skin surface.
This allows the user to view the specific area at the acoustic focus with high precision. It eliminates the guesswork involved in aiming the device, ensuring that the treatment is delivered exactly where intended.
Understanding the Design Constraints
The Necessity of Additive Manufacturing
It is important to recognize that this level of integration relies heavily on the specific capabilities of 3D printing.
Traditional manufacturing cannot easily replicate the seamless combination of optical channels and water chambers required for this device. Therefore, the precision of the device is intrinsically linked to the manufacturing tolerances of the printed polyamide.
Material Dependability
While polyamide provides robust support, the system's accuracy depends on the material maintaining its shape over time.
Any deformation in the housing would compromise the coaxial alignment, decoupling the camera view from the ultrasound focus. Consequently, the choice of material is not just about durability, but about maintaining the geometric fidelity required for precise treatment.
Making the Right Choice for Your Goal
To maximize the utility of high-frequency ultrasound equipment, you must prioritize the alignment features enabled by the housing design.
- If your primary focus is Equipment Design: Prioritize additive manufacturing techniques to integrate water chambers and optical paths directly into the chassis, reducing assembly errors.
- If your primary focus is Clinical Application: Select devices with verified coaxial alignment to ensure that your visual assessment of the skin surface perfectly matches the subcutaneous treatment zone.
Success in high-frequency ultrasound treatment relies on the seamless physical integration of vision and acoustics, made possible by advanced housing geometry.
Summary Table:
| Feature | Role in Ultrasound Equipment | Key Benefit |
|---|---|---|
| Polyamide Material | Robust structural chassis | Protects electronics and ensures geometric fidelity |
| 3D Printing Tech | Enables complex internal geometries | Integrates water chambers & optical paths into one unit |
| Coaxial Alignment | Syncs acoustic and optical axes | Guarantees treatment focus matches the camera view |
| Internal Voids | Housing-integrated water chambers | Simplifies design while maintaining cooling efficiency |
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References
- Tomasz Zawada, Torsten Bove. Strongly Focused HIFU Transducers With Simultaneous Optical Observation for Treatment of Skin at 20 MHz. DOI: 10.1016/j.ultrasmedbio.2022.03.002
This article is also based on technical information from Belislaser Knowledge Base .
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