Fluidic Bearing Ultrasonic Transducer Positioning
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Solution Overview
Problem
Current ultrasonic imaging systems face challenges in achieving high resolution and deep tissue penetration while being cost-effective and portable, particularly in ophthalmology where specular reflection from smooth corneal surfaces complicates accurate scanning, and conventional mechanical components fail in underwater operations.
Innovation Solution
A compact ultrasonic arc scanning apparatus with a scan head positioning system, waterproof arc scanning motor, fluidic bearing mechanism, and disposable eyepiece that ensures precise alignment and smooth motion of the transducer, allowing for high-frequency ultrasonic pulses to be directed accurately and consistently, even in underwater conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional mechanical components are used for transducer positioning, then device complexity is reduced, but measurement precision and scanning accuracy deteriorate due to mechanical interference and inability to maintain precise alignment in underwater conditions
Solution Approach 1:
The patent replaces conventional mechanical positioning components with a fluidic bearing mechanism that uses pressurized fluid to support and position the transducer carriage. This substitution eliminates mechanical friction and wear, enabling precise transducer alignment and smooth scanning motion in underwater conditions while maintaining measurement precision.
Solution Approach 2:
The patent employs a fluidic bearing system that utilizes pressurized fluid (pneumatics or hydraulics) to create a bearing surface between the transducer carriage and the arc guide. This fluid pressure supports the transducer weight and enables precise positioning without mechanical contact, resolving the contradiction between precision and complexity.
2Measurement precision
If high-frequency ultrasonic transducers are used for high-resolution imaging, then image resolution is improved, but tissue penetration depth deteriorates due to increased attenuation at higher frequencies
Solution Approach 1:
The patent implements a movable focal point mechanism that dynamically adjusts the focal depth of the ultrasonic beam during scanning. By changing the focal point position, the system can optimize resolution at different tissue depths, effectively managing the trade-off between high-frequency resolution and penetration depth through dynamic focusing rather than static high-frequency operation.
3Area of stationary object
If the transducer is scanned along the corneal surface to image large portions, then imaging coverage is improved, but alignment precision deteriorates due to the specular reflection properties of smooth corneal surfaces
Solution Approach 1:
The patent employs an arc-shaped guide that matches the curvature of the corneal surface. The transducer carriage moves along this curved arc, maintaining a constant radial orientation toward the center of curvature of the cornea. This geometric configuration ensures that the ultrasonic beam remains perpendicular to the corneal surface at all positions, preserving alignment precision while enabling comprehensive corneal imaging.
4Reliability
If waterproof components are used for underwater operation, then reliability in underwater conditions is improved, but device complexity and cost increase
Solution Approach 1:
The patent designs the fluidic bearing mechanism to serve multiple functions simultaneously: it provides waterproof sealing between the underwater transducer carriage and the external control system, while also enabling precise positioning and smooth scanning motion. This multi-functionality reduces the need for separate waterproofing components, thereby reducing overall device complexity while maintaining reliability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system provides high-resolution images with improved accuracy and ease of use, capable of scanning deep into tissues with reduced mechanical interference and cost, while maintaining safety and hygiene standards.
Implementation Method 1
A liquid bearing mechanism is used to separate the transducer carriage assembly from the arc guide assembly
Implementation Method 2
The liquid bearing mechanism reduces friction between moving parts, enabling smooth scanning motion
Implementation Method 3
high-frequency ultrasonic pulses to be directed accurately and consistently
Implementation Method 4
capable of scanning deep into tissues
Implementation Method 5
waterproof arc scanning motor
Data Source
AI summary
Embodiments of the present invention are directed to various aspects of imaging systems, including permeable and impermeable barriers separating liquid compartments, one of which contains the object to be imaged and the other an ultrasonic transducer, a fluidic bearing between a transducer carriage and guide supporting the carriage, a linear motor for the carriage, and a location sensing device for the carriage. A method and apparatus are disclosed for performing an ultrasound scan on a body part and specifically an instrument which directly attaches to the surface of the body. This apparatus provides high resolution images and increased depth of imaging for high resolution ultrasound of targeted subsurface body tissues. Targeted tissues may include joints, ocular structures, and internal organs. The method and apparatus stabilize and provide accurate determination of the position of the body part relative to the ultrasound probe.