Gamma Camera Proximity Adjustment for Body Contour Imaging
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current gamma camera imaging systems face resolution degradation due to the inability to maintain detectors close to the patient's body contour, especially in non-circular orbits and 'L' mode configurations, which limits the accuracy of radiopharmaceutical distribution imaging.
Innovation Solution
The system employs a gantry with a rotor and proximity sensors to automatically adjust the position of gamma cameras in an L-mode configuration, allowing for independent radial and lateral movements to maintain optimal proximity to the patient, thereby enhancing image resolution by minimizing distance and improving contour following.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If gamma cameras are placed in a fixed L-mode configuration with limited lateral motion, then device complexity is reduced, but image resolution degrades due to inability to maintain optimal proximity to patient body contour
Solution Approach 1:
The patent implements dynamic detector positioning by enabling independent radial and lateral movement of gamma cameras during rotation. The detectors can adjust their positions in real-time to follow the patient's body contour, transitioning from a fixed L-mode configuration to a dynamic adaptive configuration that maintains optimal imaging distance throughout the scan orbit.
Solution Approach 2:
The system employs proximity sensors that continuously monitor the distance between detectors and patient body surface. This feedback information is used to automatically adjust detector positions via radial and lateral actuators, ensuring detectors remain at optimal imaging distance while compensating for variations in patient anatomy during the scan.
2Measurement precision
If standard elliptical or oval orbits are used for detector rotation, then device complexity is minimized, but image resolution degrades because the orbit does not follow patient body contour closely
Solution Approach 1:
The patent transforms the static elliptical/oval orbit into a dynamic adaptive orbit by superimposing radial and lateral adjustments on the base rotational path. This allows the detector trajectory to dynamically conform to the patient's body contour while maintaining the simplicity of automated rotational scanning.
Solution Approach 2:
The detector positioning system is segmented into independent radial and lateral adjustment mechanisms that operate separately from the main rotational drive. This modular approach allows complex contour-following motion to be achieved through coordinated simple movements, maintaining ease of operation while improving resolution.
3Measurement precision
If gamma cameras are positioned close to patient surface to minimize resolution loss, then image resolution improves, but device complexity increases due to need for automatic position adjustment
Solution Approach 1:
Proximity sensors provide continuous feedback on detector-to-patient distance, enabling automatic real-time adjustment of detector positions. This feedback loop ensures detectors maintain optimal proximity to the patient's body contour throughout scanning, maximizing image resolution without requiring complex manual positioning.
Solution Approach 2:
The system performs self-adjustment of detector positions using automated radial and lateral actuators controlled by proximity sensor feedback. This self-service capability eliminates the need for manual intervention while maintaining optimal imaging geometry, balancing resolution improvement with acceptable system complexity.
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
This approach enables improved image resolution by maintaining gamma cameras in close proximity to the patient, reducing operator input, and shortening scan times while ensuring safety and comfort during imaging.
Implementation Method 1
Gamma camera detector heads, typically including a collimator, are placed adjacent to a surface of the subject to monitor and record emitted radiation
Implementation Method 2
Typical gamma cameras may comprise a large scintillation crystal of NaI optically coupled to an array of Photo-Multiplying Tubes (PMTs)
Data Source
AI summary
Methods and systems for imaging a subject using an imaging system are provided. The method includes rotating a first detector and a second detector about a subject and determining a distance of the first detector and the second detector from the subject. The method further includes automatically adjusting the position of at least one of the first detector and the second detector to within a predetermined distance range if the determined distance of one of the first and second detectors is not within the predetermined distance range.