CT Gantry Interference Detection Using Depth Sensors
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Solution Overview
Problem
In medical diagnostic-imaging apparatuses like X-ray CT machines, interference between the subject and the gantry device can lead to unnecessary radiation exposure due to the need for suspension or retake of scans when alignment issues occur.
Innovation Solution
The X-ray CT apparatus employs a processing circuitry to set an inserting range for the subject, acquire its position, and determine if it interferes with the gantry device, adjusting the couchtop position to prevent interference and reduce exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the subject is moved into the gantry device for imaging, then imaging can be performed, but interference between the subject and gantry device may occur causing suspension or retake
Solution Approach 1:
The system performs preliminary detection of the subject's position and dimensions using a camera and depth sensor before the subject enters the gantry device. Based on this preliminary information, the system calculates and determines the appropriate couchtop position in advance to prevent interference, thereby avoiding suspension or retake during imaging.
Solution Approach 2:
The system continuously acquires real-time position information of the subject using imaging devices and depth sensors during the movement process. This feedback information is used to dynamically adjust the couchtop position and movement speed, ensuring that the subject does not interfere with the gantry device while maintaining imaging continuity.
2Manufacturing precision
If suspension or retake is performed due to interference, then imaging quality can be maintained, but unnecessary radiation exposure occurs
Solution Approach 1:
The system determines the optimal couchtop position and subject alignment in advance using non-radiative detection methods (camera and depth sensor) before the subject enters the imaging zone. This preliminary positioning ensures that imaging can proceed without interruption, eliminating the need for retake and associated radiation exposure.
Solution Approach 2:
The system replaces traditional mechanical positioning methods with optical detection (camera) and depth sensing technologies to determine subject position and dimensions. This substitution allows for precise positioning without requiring trial-and-error mechanical adjustments that would lead to suspension or retake and unnecessary radiation exposure.
Data Source
AI summary
A medical diagnostic-imaging apparatus according to an embodiment includes a gantry device and a processing circuitry. The gantry device includes an opening in which a subject is inserted. The processing circuitry is configured to set an inserting range indicating a range in which the subject is inserted into the opening by move of the subject or by move of the gantry device based on a scan plan. The processing circuitry is configured to acquire a position of the subject in the inserting range as first position information. The processing circuitry is configured to determine whether the subject interferes with the gantry device based on the first position information.