Laser Line Projector for Cephalometric Radiography Alignment
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Solution Overview
Problem
Current lateral cephalometric radiograph devices lack a method to accurately ensure the user's head is perpendicular to the sagittal plane, leading to difficulties in obtaining precise lateral cephalometric images due to the inability to verify vertical alignment.
Innovation Solution
A laser line projecting device is integrated into the lateral cephalometric radiograph device, featuring a support rod with a projection unit that projects vertical and horizontal lines onto the user's face, allowing operators to visually confirm alignment and adjust the head accordingly, utilizing a camera and control unit for image analysis and automatic operation control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the ear plug is coupled to the ear hole to adjust the head position, then the left-right tilt of the user's head can be adjusted, but there is no method to check whether the user's head is vertical leading to inaccurate positioning
Solution Approach 1:
A laser projection device is introduced as an intermediary tool between the operator and the user's head to provide visual reference lines (vertical and horizontal) that enable accurate alignment verification. The laser lines serve as a mediator that bridges the gap between the mechanical positioning system and the operator's ability to verify correct positioning.
Solution Approach 2:
The invention uses light projection (laser lines) to create visible visual indicators on the user's face. The projected light lines provide color/brightness contrast that makes it easy to observe and verify head alignment, transforming an invisible alignment problem into a visible one through optical indication.
2Manufacturing precision
If no alignment verification method is provided, then the device structure remains simple, but the user's head is photographed while laterally tilted resulting in inaccurate lateral cephalometric images
Solution Approach 1:
The laser projection device acts as an intermediary alignment verification system that adds minimal complexity to the overall device while dramatically improving image accuracy. It provides a simple yet effective method to ensure proper head positioning without requiring complex mechanical adjustment mechanisms.
Solution Approach 2:
The invention replaces complex mechanical alignment verification systems with an optical-based laser projection system. This substitution simplifies the verification process by using light projection and visual observation instead of mechanical gauges or complex positioning mechanisms.
3Measurement precision
If the laser line projector is added to verify head alignment, then accurate sagittal plane positioning can be achieved, but the device structure and operation complexity increase
Solution Approach 1:
The laser projection device is designed to provide multiple functions: vertical line projection for lateral tilt verification, horizontal line projection for vertical tilt verification, and optional photography capability. This multi-functionality justifies the added complexity by providing comprehensive alignment verification in a single integrated system.
Solution Approach 2:
The laser projection system performs preliminary alignment verification before the actual radiography is taken. By projecting reference lines and allowing the operator to verify head positioning in advance, the system ensures accurate sagittal plane positioning is achieved before the irreversible radiography process begins.
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 verification of the user's head alignment on the sagittal plane, ensuring precise lateral cephalometric images by allowing real-time adjustment and preventing eye injury through automatic projection control.
Implementation Method 1
a projection unit (20) that is provided in the support rod (10) and project linear light onto a face of the user fixed to the ear rods (3)
Data Source
AI summary
The present invention relates to a laser line projecting device having a new structure, which is provided in a lateral cephalometric radiograph device to check whether a center of a user's face is accurately located on a sagittal plane by vertically or horizontally projecting light onto the user's face.The laser line projecting device for a lateral cephalometric radiograph device according to the present invention includes a support rod (10) extending downward from a lower surface of the support (1) of the lateral cephalometric radiograph device and a projection unit (20) provided on the support rod (10) and projecting linear light onto the user's face fixed to the ear rod (3), and the projection unit (20) projects a vertical line (21) extending in a vertical direction and a horizontal line (22) extending in a horizontal direction.Thus, an operator may visually check the vertical line (21) to identify whether a central line of the user's face is accurately located on a sagittal plane, may photograph the head in a state in which the user's head is adjusted to be exactly perpendicular to the left-right direction and the front-rear direction, and thus may obtain an accurate lateral cephalometric image.