7d Surgical Inc.

7d Surgical Ulc

Ipg Photonics Corporation

Queen's University at Kingston

Other

Ipg Phontonics

Victor X D Yang

Beau Anthony Standish

Peter Siegler

Adrian Mariampillai

Michael Leung

Adrian Linus Dinesh Mariampillai

Michael K K Leung

Paul J L Webster

James M Fraser

Michael Ka Kit Leung

Ronald G Litke

Ernest N Corrao, Jr

Glenn Paul DiCostanzo

Andrew Kula

Kathleen Chancellor-Maddison

Kenneth Kuei-Ching Lee

Elena Berman

Chaoliang Chen

Jean-Francois Paul

Methods and systems are provided for using optical interferometry in the context of material modification processes such as surgical laser or welding applications. An imaging optical source that produces imaging light. A feedback controller controls at least one processing parameter of the material modification process based on an interferometry output generated using the imaging light. A method of processing interferograms is provided based on homodyne filtering. A method of generating a record of a material modification process using an interferometry output is provided.

Methods and systems for coherent imaging and feedback control for modification of materials using dynamic optical path switch in the reference arms

Systems and methods are provided for performing optical coherence tomography (OCT) angiography for the rapid generation of en-face images. According to one example embodiment, differential interferograms obtained using a spectral domain or swept source OCT system are convolved with a Gabor filter, where the Gabor filter is computed according to an estimated surface depth of the tissue surface. The Gabor-convolved differential interferogram is processed to produce an en-face image, without requiring the performing of a fast Fourier transform and k-space resampling. In another example embodiment, two interferograms are separately convolved with a Gabor filter, and the amplitudes of the Gabor-convolved interferograms are subtracted to generate a differential Gabor-convolved interferogram amplitude frame, which is further processed to generate an en-face image without performing a fast Fourier transform and k-space resampling. The example OCTA methods disclosed herein are shown to achieve faster data processing speeds compared to conventional OCTA algorithms.

Systems and methods for performing Gabor optical coherence tomographic angiography

Systems and methods are provided in which an intraoperative video feed is augmented with one or more virtual display features based on a detected orientation and position of the tracked medical instrument. In some example embodiments, the virtual display features may be employed to represent, in an augmented video feed, information associated with a previously-detected intraoperative position and orientation of the tracked medical instrument. The virtual display element may be employed, for example, to facilitate the alignment of an untracked medical instrument with a previously determined intraoperative position and orientation of the tracked medical instrument. In other example embodiments, the virtual display element may be dynamically displayed in a fixed spatial relationship relative to the tracked medical instrument.

Systems and methods for performing intraoperative guidance

Systems and methods are disclosed whereby a surface detection system is employed to obtain intraoperative surface data characterizing an exposed surface of the spine. In some embodiments, this intraoperative surface data is registered to segmented surface data obtained from volumetric data of the spine in order to assess the intraoperative orientation of the spine and provide feedback associated with the intraoperative orientation of the spine. The feedback may characterize the intraoperative spinal orientation as a change relative to the preoperative orientation.

Systems and methods for determining intraoperative spinal orientation

Alignment systems and devices are provided for controlling the alignment of an optical payload. In some embodiments, an optical positioning system is provided that includes a yoke supporting an optical payload. The yoke, which includes a plurality of articulated segments and associated pivot joints, is mechanically coupled to the optical payload, such that when the optical payload is oriented in a given direction, such as towards a distal target, the optical payload is rotatable about a distal pivot axis associated with a distal pivot joint of the yoke. The pivot joints of the yoke may be configured such that the rotation axis associated with a given pivot joint passes sufficiently close to a respective center of mass of a distalward portion of the optical alignment system beyond the given pivot joint, such that the position and orientation of the optical payload is maintained in the absence of external forces.

Optical alignment system

Various example embodiments of the present disclosure provide systems and methods for performing image-guided navigation during medical procedures using intraoperative surface detection. A surface detection device is employed to obtain intraoperative surface data characterizing multiple surface regions of a subject. Pre-operative volumetric image data is registered to each surface region, providing per-surface-region registration transforms. In some example embodiments, navigation images may be generated intraoperatively based on the dynamic selection of a suitable registration transform. For example, a registration transform for generating navigation images may be dynamically determined based on the proximity of a tracked surgical tool relative to the surface regions. In an alternative example embodiment, multiple navigation images may be displayed, wherein each navigation image is generated using a different registration transform.

Systems and methods for performing intraoperative surface-based registration and navigation

The present disclosure provides systems and methods for generating spatial annotations within guidance images that are displayed during a guided medical procedure, where the spatial annotations provide spatial graduations indicating known length measures. The spatial measures may be employed to visually assess the sizes of anatomical and/or functional features displayed in the guidance images.

Systems and methods for displaying guidance images with spatial annotations during a guided medical procedure

The present disclosure relates to the generation of partial surface models from volumetric datasets for subsequent registration of such partial surface models to surface topology datasets. Specifically, given an object that is imaged using surface topology imaging and another volumetric modality, the volumetric dataset is processed in combination with an approach viewpoint to generate one or more partial surfaces of the object that will be visible to the surface topology imaging system. This procedure can eliminate internal structures from the surfaces generated from volumetric datasets, thus increases the similarity of the dataset between the two different modalities, enabling improved and quicker registration.

System and method for generating partial surface from volumetric data for registration to surface topology image data

Systems and methods are provided in which intraoperatively acquired surface data is employed to verify the correspondence of an intraoperatively selected spinal level with a spinal level that is pre-selected based on volumetric image data. Segmented surface data corresponding to the pre-selected spinal levels may be obtained from the volumetric image data, such that the segmented surface data corresponds to a spinal segment that is expected to be exposed and identified intraoperatively during the surgical procedure. The segmented surface data from the pre-selected spinal level, and adjacent segmented surface data from an adjacent spinal level that is adjacent to the pre-selected spinal level, is registered to the intraoperative surface data, and quality measures associated with the registration are obtained, thereby permitting an assessment or a determination of whether or not the pre-selected spinal surface (in the volumetric frame or reference) is likely to correspond to the intraoperatively selected spinal level.

Systems and methods for intraoperative spinal level verification

Devices and systems are provided for tracking a position and orientation of a handheld implement, such that the handheld implement may be trackable with an overhead tracking system. A support member secures one or more markers relative to a longitudinal portion of the handheld implement, and a marker plane containing the markers is orientated an angle relative to a longitudinal axis of the longitudinal portion. A marker assembly may include a support member for supporting the markers, and a connector for removably attaching the marker assembly to one or more handheld implements. The marker assembly may be configured to be removably attachable to a plurality of connection adapters, where each connection adapter is further connectable to a handheld implement, optionally at a calibrated position, such that a single connection adapter can be optionally employed to track a plurality of handheld implements. The handheld implement may be a medical instrument.

Attachments for tracking handheld implements

Systems and methods are provided for performing intraoperative fusion of two or more volumetric image datasets via surface-based image registration. The volumetric image datasets are separately registered with intraoperatively acquired surface data, thereby fusing the two volumetric image datasets into a common frame of reference while avoiding the need for complex and time-consuming preoperative volumetric-to-volumetric image registration and fusion. The resulting fused image data may be processed to generate one or more images for use during surgical navigation.

Systems and methods for performing intraoperative image registration

Systems and methods are provided for performing optical coherence tomography angiography for the rapid generation of en face images. According to one example embodiment, differential interferograms obtained using a spectral domain or swept source optical coherence tomography system are convolved with a Gabor filter, where the Gabor filter is computed according to an estimated surface depth of the tissue surface. The Gabor-convolved differential interferogram is processed to produce an en face image, without requiring the performing of a fast Fourier transform and k-space resampling. In another example embodiment, two interferograms are separately convolved with a Gabor filter, and the amplitudes of the Gabor-convolved interferograms are subtracted to generate a differential Gabor-convolved interferogram amplitude frame, which is then further processed to generate an en face image in the absence of performing a fast Fourier transform and k-space resampling. The example OCTA methods disclosed herein are shown to achieve faster data processing speeds compared to conventional OCTA algorithms.

Systems and methods for performing gabor optical coherence tomographic angiography

Systems and methods are provided for optical topology detection and illumination. Embodiments provide an integrated system, and methods of operation thereof, where the integrated system includes an illumination system and an optical topology detection system, and where at least a portion of the spectral content of illumination light from the illumination system is within an optical detection bandwidth of the optical topology detection system, and where the operation of the optical topology detection system and the illumination system are interleaved to avoid crosstalk, such that the optical topology detection system detects the optical topology detection light when the illumination system is not emitting illumination light. The system may include, and control the operation of, an optical navigation system. The components of the system may be mounted to a rigid frame to maintain calibration.

Growing community of inventors

Toronto, Canada

Victor X D Yang