Ophthalmologic Imaging Position Setting with Still Image Capture
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Solution Overview
Problem
Current ophthalmologic photographing apparatuses face challenges in accurately and easily setting the acquisition position of tomographic images due to involuntary movements and breathing of the examinee, leading to burdensome repeated attempts by examiners.
Innovation Solution
An ophthalmologic photographing apparatus with a scanning unit, observing optical system, user interface, display, and controller that allows for real-time display of moving images, enables setting of scan positions using both moving and still images, and corrects scan positions based on detected displacement, ensuring accurate and efficient acquisition of tomographic images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If real-time display of moving image is provided, then ease of operation is improved, but measurement precision deteriorates due to involuntary movements and breathing
Solution Approach 1:
The system captures a still image from the moving image at the moment when the user sets the scan position. This preliminary action of freezing the image at the desired position allows the user to accurately set the scan position without being affected by involuntary eye movements or breathing during the setting process.
Solution Approach 2:
The system displays the still image obtained from the moving image, providing visual feedback to the user. This feedback mechanism allows the user to confirm the scan position setting by viewing the captured still image, ensuring accuracy while maintaining ease of operation.
2Adaptability or versatility
If scan position is set manually, then adaptability is improved, but loss of time increases due to repeated attempts
Solution Approach 1:
The system captures a still image from the moving image at the moment when the user sets the scan position. This preliminary action of freezing the image at the desired position allows the user to accurately set the scan position without being affected by involuntary eye movements or breathing during the setting process.
Solution Approach 2:
The system displays the still image obtained from the moving image, providing visual feedback to the user. This feedback mechanism allows the user to confirm the scan position setting by viewing the captured still image, ensuring accuracy while maintaining ease of operation.
3Productivity
If moving image is displayed continuously, then productivity is improved, but measurement precision deteriorates due to image displacement
Solution Approach 1:
The system captures a still image from the moving image at the moment when the user sets the scan position. This preliminary action of freezing the image at the desired position allows the user to accurately set the scan position without being affected by involuntary eye movements or breathing during the setting process.
Solution Approach 2:
The system displays the still image obtained from the moving image, providing visual feedback to the user. This feedback mechanism allows the user to confirm the scan position setting by viewing the captured still image, ensuring accuracy while maintaining ease of operation.
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 accurate and easy setting of scan positions, reducing the need for repeated attempts and improving the efficiency of capturing tomographic images by tracking and correcting for involuntary movements, thus enhancing the precision and convenience of the imaging process.
Implementation Method 1
An ophthalmic optical coherence tomography (OCT) apparatus using low coherent light is known as an ophthalmologic photographing apparatus that can obtain a tomographic image of a predetermined portion (e.g., the fundus or anterior segment) of an examinee's eye noninvasively
Implementation Method 2
an observing optical system that includes a light-receiving device configured to receive reflected light from the examinee's eye to obtain a moving image of a front image of the examinee's eye
Data Source
AI summary
An ophthalmologic photographing apparatus includes: a photographing optical system that includes a scanning unit for scanning an examinee's eye with measurement light to obtain a tomographic image of the examinee's eye; an observing optical system that includes a light-receiving device for receiving reflected light from the examinee's eye to obtain a moving image of a front image of the examinee's eye based on a light-receiving signal from the light-receiving device; a display controller for displaying the front image acquired by the observing optical system in a still state on a monitor as well as enabling setting of a capturing position of the tomographic image, the setting using the front image; and a drive controller for controlling the scanning unit to acquire the tomographic image in accordance with the capturing position.