Awake Animal Molecular Imaging with Optical Motion Compensation
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Solution Overview
Problem
Current molecular imaging systems for small animals require anesthesia and restrict movement, causing stress and limiting study scope due to separation from social groups and unfamiliar environments, which affects brain activity and metabolism.
Innovation Solution
A molecular imaging system for awake and freely moving animals, using a transparent animal cage surrounded by detectors and a motion tracking system, allowing prolonged imaging while maintaining animal welfare by simulating natural conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If anesthesia is used to immobilize the animal during imaging, then imaging stability is improved, but brain activity and metabolism are altered
Solution Approach 1:
The patent replaces the mechanical constraint method (anesthesia-induced immobilization) with a motion compensation approach. Optical detection systems track the animal's position and orientation in real-time, and the imaging system dynamically adjusts to compensate for motion, allowing awake animals to be imaged without physiological alteration.
Solution Approach 2:
The system changes the operational parameters by transitioning from static imaging conditions (requiring anesthesia) to dynamic imaging conditions (awake state). Through real-time motion tracking and adaptive imaging parameters, the system maintains image quality despite the animal being awake and mobile.
2Ease of operation
If the animal is separated from its cage and social group for imaging, then imaging accessibility is improved, but animal stress increases
Solution Approach 1:
The patent merges the imaging system with the animal cage, allowing the animal to remain in its familiar living environment during imaging. The cage serves as both the housing structure and the imaging chamber, eliminating the need to separate the animal from its social group and familiar surroundings.
Solution Approach 2:
The imaging system is designed to be compatible with standard animal cage infrastructure, making the cage a multi-functional element that serves both as housing and as the imaging environment. This universal design allows imaging to occur in the animal's natural habitat without requiring specialized separate facilities.
3Productivity
If the animal is carried to a separate imaging device, then imaging capability is improved, but the animal is placed in an unfamiliar environment causing stress
Solution Approach 1:
The imaging system is nested within or integrated with the animal cage structure. The detectors and imaging components are positioned inside or around the cage, allowing the animal to remain in its familiar enclosure while still receiving the imaging treatment, rather than being transported to a separate facility.
4Measurement precision
If head immobilization accessories are used for awake imaging, then imaging precision is improved, but animal freedom of movement is restricted
Solution Approach 1:
The system employs real-time optical tracking that continuously monitors the animal's head position and orientation. This feedback information is used to dynamically adjust the imaging parameters and reconstruction algorithms, maintaining imaging precision without requiring physical constraints on the animal's movement.
Solution Approach 2:
The imaging system transitions from static head fixation to dynamic motion compensation. The system adapts to the animal's natural movements in real-time, allowing the animal to move freely while the imaging system adjusts its parameters to maintain precision through dynamic rather than static control.
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 prolonged, stress-free imaging of small animals in their living quarters, correlating brain activity with natural behavior and social interactions, enhancing the scope and accuracy of molecular imaging.
Implementation Method 1
a detector assembly comprising a plurality of molecular imaging detectors immediately surrounding the enclosure for detecting radiation emitted by the small animal
Implementation Method 2
a motion tracking system for optical tracking position and orientation of the animal with optical detectors to synchronize movement and molecular images
Data Source
AI summary
A molecular imaging system for imaging of an awake and freely moving small animal includes a cuboid animal cage for one or more small animals and an enclosure for receiving the animal cage. The cuboid animal cage and the enclosure are transparent to the radiation emitted by the animal. At least part of the animal cage is transparent to light. A detector assembly including multiple molecular imaging detectors immediately surrounds the enclosure for detecting radiation emitted by the small animal. The molecular imaging detectors and the enclosure cover at least three sides of the cuboid animal cage in a U-shaped manner. A motion tracking system for optical tracking of position and orientation of the animal with optical detectors synchronizes movement and molecular images. A computation unit processes data registered by the detector assembly and the motion tracking system.