Intravascular Imaging Probe Radial Scanning Speed Control
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Solution Overview
Problem
Current image diagnostic systems, such as IVUS and OCT, face challenges in real-time image display during faster radial scanning due to limitations in frame rate, leading to potential image blur and inconvenience in data acquisition, especially when faster scanning speeds are required.
Innovation Solution
An image diagnostic system with a probe capable of transmitting and receiving signals during radial scanning, featuring a main control unit that extracts and processes data at a frame rate compatible with the display unit, allowing for real-time image formation and storage for subsequent display, enabling faster scanning without compromising real-time image output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If radial scanning speed is increased to reduce diagnosis time, then scanning speed is improved, but image blur occurs due to heart beat during scanning
Solution Approach 1:
The system performs preliminary data acquisition at high scanning speeds and stores the raw data in memory before image reconstruction. This allows the scanning to be completed quickly while the image processing occurs subsequently, eliminating the heart beat blur issue during the actual scanning phase while maintaining diagnostic image quality in the final output.
2Speed
If radial scanning is performed faster than display frame rate, then scanning speed is improved, but real-time image display becomes impossible
Solution Approach 1:
The system segments the image processing task into two distinct phases: real-time display phase using extracted portions of data at display-compatible frame rates, and complete image reconstruction phase using all acquired data afterward. This segmentation allows simultaneous achievement of fast scanning and real-time feedback display.
Solution Approach 2:
The system introduces an intermediary data extraction and processing unit that converts high-speed scanning data into display-compatible formats in real-time, while preserving the complete raw data for subsequent full-resolution image reconstruction. This intermediary layer bridges the gap between fast acquisition and display limitations.
3Quantity of substance
If all data is stored without real-time construction, then data completeness is improved, but real-time confirmation of data acquisition is impossible
Solution Approach 1:
The system implements feedback by displaying real-time reconstructed images from extracted data portions during the scanning process. This provides immediate confirmation to operators that data acquisition is proceeding normally, while the complete raw data is simultaneously preserved for full image reconstruction afterward, eliminating the need for reinsertion if issues are detected early.
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
Enables real-time output of images even during increased or faster radial scanning by the probe, improving diagnostic efficiency and reducing the need for reinsertion of the catheter, thus enhancing the suitability of the system for image diagnostics.
Implementation Method 1
control an ultrasonic transducer to perform radial scanning within a blood vessel, to receive a reflected wave(s) (ultrasound echoes) reflected by biotissue (e.g. the blood vessel wall) by the same ultrasonic transducer
Implementation Method 2
Light is emitted in the blood vessel while radially scanning the optical mirror arranged on the side of the distal end of the optical fiber, and based on light reflected from biotissue forming the blood vessel, a tomographic image of the blood vessel is then constructed and displayed
Data Source
AI summary
An image diagnostic system controls a probe to perform radial scanning within a body cavity and to acquire reflected signals through the probe. The system produces data based on the signals, constructs and outputs tomographic images of the body cavity and biotissue surrounding the body cavity. The system includes an extraction unit for extracting portions of the produced data on the basis of a frame rate upon successively outputting the tomographic images, and a first output control unit for forming, based on the extracted data, real time tomographic images of the body cavity and biotissue which are outputted in real time during radial scanning. A storage device stores the produced data, and a second output control unit forms, subsequent to the radial scanning, tomographic images of the body cavity and biotissue based on the stored data which are then outputted.