Self-orienting imaging device and methods of use
Inventors
Assignees
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Publication Number
US-11576568-B2
Publication Date
2023-02-14
Expiration Date
Abstract
The Self-Orienting Imaging Device and Methods of Use sense the orientation of the handheld imaging, and apply the rotational correction by rotating the image to be displayed. When a scanner is used, the scanning element in the scanner is adjusted, such that the eventual scanning direction remains unchanged referencing the subject anatomy. The self-orienting mechanism for the scanner may be implemented in hardware mechanisms.
Core Innovation
The invention relates to a method of self-orienting an imaging device that uses an orientation sensor operably fixed to a scanner or imager. The method calibrates the orientation of the sensor and calculates a transformation matrix from the orientation when the z axes of the scanner and the sensor align and the x-y plane rotates an angle Θ.
The method obtains a preferred display orientation by aligning a default scanning orientation of the scanner along an axis. After imaging with the scanner and obtaining new scanner orientations, the method compares the new scanner orientations with the preferred display orientation to determine a rotational angle. In related aspects, the preferred display orientation is obtained by keeping the scanner stationary and allowing rotation of a displayed image to reach the preferred orientation.
The rotational correction is provided either by rotating the displayed image or by adjusting the OCT scanning element so the scan direction stays aligned with subject anatomy, with preference for a default display axis. Additional aspects include selecting an orientation sensor chosen from accelerometers, gyroscopes, magnetometers, or any combination of these, and detecting motion of the imaging device using a motion detector.
The device can be prepared for use or motion patterns can be translated to user commands, and motion artifacts can be detected. A motion alert is issued when angular velocity or acceleration exceeds a predetermined threshold, and the motion detector can further detect gestures to execute commands selected from calibration, scanning, sensing orientation, and a correction method.
Claims Coverage
The partial content includes three independent methods. Across these, the claim coverage includes transformation-matrix-based orientation determination, preferred scan/display orientation selection, and rotational correction via either displayed image rotation or scanner scanning-angle adjustment driven by a waveform requirement, with optional motion artifact alerting and gesture/motion-driven control.
Calibrating sensor orientation and calculating a transformation matrix
Calibrating an orientation of a sensor operably fixed to a scanner or imager; calculating a transformation matrix from the orientation when the z axes of the scanner and the sensor align and the x-y plane rotates an angle Θ.
Preferred display orientation via default scanning orientation alignment
Obtaining a preferred display orientation by aligning a default scanning orientation of the scanner along an axis; and comparing new scanner orientations with the preferred display orientation to determine a rotational angle.
Preferred B-scan orientation and scanning-angle adjustment driven by waveform requirement
Setting a preferred B-scan orientation; calibrating a scanning angle of the scanner to drive a waveform requirement and fulfill a driving waveform requirement; adjusting the scanning angle by an adjustment angle; converting the adjustment angle to drive the waveform requirement of the scanner; and imaging with the scanner.
Motion detection, transformation, preferred scan orientation, and waveform-driven scanning-angle adjustment
Detecting a motion of the imaging device by a motion detector and preparing the device for use or translating motion patterns to user commands; calibrating an orientation of a sensor operably coupled to a scanner; calculating a transformation matrix from the orientation; obtaining a preferred scan orientation; calibrating a scanning angle of a scanner to drive a waveform requirement to fulfill a driving waveform requirement; adjusting the scanning angle by an adjustment angle; converting the adjustment angle to drive the waveform requirement; and imaging with the scanner.
Overall, the independent claim coverage centers on self-orienting imaging using calibrated sensor orientation and a transformation matrix, selecting a preferred display/scan orientation, and applying rotational correction through either rotational alignment of a displayed image or scanning-angle adjustment that is converted into a waveform requirement to drive the scanner. The coverage further supports optional motion-artifact alerting based on angular velocity/acceleration thresholds and motion/gesture-driven command execution.
Stated Advantages
Not explicitly described in patent.
Documented Applications
Not explicitly described in patent.
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