X-Ray Diagnostic C-Arm Double-Slide Structure for Wider Imaging
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Solution Overview
Problem
Existing X-ray diagnostic apparatuses face challenges in securing a wide imaging range for three-dimensional imaging due to limitations in the slidable stroke of the C-arm or Ω-arm, which can lead to increased size, complexity, and reduced accessibility when multiple arms are used.
Innovation Solution
The X-ray diagnostic apparatus employs a double-slide structure with roller units that slide in the same circular arc direction as the C-arm, allowing the stroke to be widened without increasing the apparatus size, using a single driving force to coordinate the movements of the C-arm and roller units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If a single C-arm is used, then the apparatus size is compact, but the imaging range is limited and cannot achieve 180° or greater coverage
Solution Approach 1:
The roller unit is nested within the holder, allowing the C-arm to slide within the holder while the roller unit provides additional sliding capability. This nested configuration enables extended imaging range without proportionally increasing overall apparatus size or structural complexity.
Solution Approach 2:
The invention introduces a second degree of freedom by adding the roller unit that slides in the same circular arc direction as the C-arm. This additional dimensional movement capability allows the system to achieve 180° or greater imaging range while maintaining a relatively compact structure through coordinated sliding movements.
2Length of moving object
If multiple arms are used to widen the stroke, then the imaging range is improved, but the apparatus size and internal complexity increase
Solution Approach 1:
The roller unit is placed inside the holder structure, with the C-arm nested within the roller unit. This nested arrangement allows multiple sliding stages without proportionally increasing the external dimensions of the apparatus, maintaining a compact footprint while achieving extended stroke.
Solution Approach 2:
The holder and roller unit are combined into an integrated structure where the holder supports both the C-arm and the roller unit. This merging of components allows the system to achieve extended stroke capability without adding separate independent arm structures that would increase overall apparatus size.
3Length of moving object
If multiple arms are used to widen the stroke, then the imaging range is improved, but the internal complexity and reduced accessibility occur
Solution Approach 1:
The nested configuration of the C-arm within the roller unit within the holder creates a hierarchical structure that is easier to control than multiple independent arms. This nesting reduces internal complexity by organizing multiple moving elements in a structured manner with shared support mechanisms.
Solution Approach 2:
The holder serves multiple functions: it supports the C-arm, contains the roller unit, and provides the sliding mechanism. This multi-functionality reduces the number of separate components needed, thereby reducing internal complexity while achieving extended stroke capability.
Data Source
AI summary
An X-ray diagnostic apparatus according to an embodiment includes an arm, a first holder, a second holder, a driver, and a third holder. The arm has the shape of a circular arc; supports an X-ray tube and an X-ray detector. The first holder grasps the arm in a movable manner in the circular arc direction. The second holder supports the first holder in a movable manner in the circular arc direction. The driver is disposed in the second holder; moves the first holder; and, at the same time, relatively moves the arm with respect to the first holder. The third holder is orthogonal to the rotation axis involved in the movement of the arm in the circular arc direction and holds the second holder in a rotatable manner with the axis substantially orthogonal to the vertical direction serving as the rotation axis.