-
公开(公告)号：US20210128103A1
公开(公告)日：2021-05-06
申请号：US17083776
申请日：2020-10-29
Applicant: Worcester Polytechnic Institute
Inventor： Haichong Zhang , Ryosuke Tsumura , Yichuan Tang
Abstract: A Ring-Arrayed Forward-viewing (RAF) ultrasound imaging and administration device combines an ultrasonic (US) US imager including a plurality of single element transducers arranged in a circular frame to define a ring array, and an instrument posture tracking circuit coupled to the ring array for performing RF (radio frequency) data acquisition with the plurality of ring-arrayed transducers. A needle holster is concentrically disposed in the ring array and is adapted to receive and direct an insertion instrument such as a needle, probe or extraction tool along an axis defined by a center of the ring array directed by the concentric needle holster. The tracking circuit includes a processor having instructions for instrument posture tracking and US imaging.
-
公开(公告)号：US20230301510A1
公开(公告)日：2023-09-28
申请号：US18125823
申请日：2023-03-24
Applicant: Worcester Polytechnic Institute
Inventor： Haichong Zhang , Yu Chen , Xihan Ma
Abstract: A robotically driven OCT scanning and imaging system provides a 3-dimensional (3D) image rendering based on a 2-dimensional (2D) surface traversal of a Region of Interest (ROI) for immediate depiction of tissue health with an accuracy and portability not available with conventional imaging approaches. A comprehensive scan over the surface of the ROI ensures complete coverage, and a signal indicative of attenuation of the optical scan indicates penetration of the OCT stimulus. The received signal for each location is aggregated, or “stitched” together with the signal received from adjacent locations to provide a full mapping of the scanned region, and rendered as a color or shading map for showing anomalies or sudden variances in tissue health.
-
公开(公告)号：US20240389861A1
公开(公告)日：2024-11-28
申请号：US18674020
申请日：2024-05-24
Applicant: Worcester Polytechnic Institute
Inventor： Haichong Zhang , Shang Gao , Xihan Ma
Abstract: A photoacoustic (PA) sensor device has a localization feature that defines a position of the sensor or scan information with a coordinate frame defining relative positions a scanned specimen and sensor information of other imaging planes of the scanned specimen. The coordinate frame is defined by positional information from localization markers at a known offset from the sensor, or from position signals from a robotic actuator driving the sensor. A processor coalesces the sensor information and positional information to reconstruct a 3-dimensional rendered structure by stitching together the sensor information to form a continuous rendering. Stitching may include adjacent imaging planes at an angular offset due to a varied pose of the sensor, and/or adjacent images over a lateral area too large for a single scan or imaging plane to capture.
-
Patent Agency Ranking
公开(公告)号：US11627933B2
公开(公告)日：2023-04-18
申请号：US17083776
申请日：2020-10-29
Applicant: Worcester Polytechnic Institute
Inventor： Haichong Zhang , Ryosuke Tsumura , Yichuan Tang
Abstract: A Ring-Arrayed Forward-viewing (RAF) ultrasound imaging and administration device combines an ultrasonic (US) US imager including a plurality of single element transducers arranged in a circular frame to define a ring array, and an instrument posture tracking circuit coupled to the ring array for performing RF (radio frequency) data acquisition with the plurality of ring-arrayed transducers. A needle holster is concentrically disposed in the ring array and is adapted to receive and direct an insertion instrument such as a needle, probe or extraction tool along an axis defined by a center of the ring array directed by the concentric needle holster. The tracking circuit includes a processor having instructions for instrument posture tracking and US imaging.
-
公开(公告)号：US20240130801A1
公开(公告)日：2024-04-25
申请号：US18381510
申请日：2023-10-18
Applicant: Worcester Polytechnic Institute
Inventor： Haichong Zhang , Xihan Ma , Ashiqur Rahaman , Wen-Yi Kuo
CPC classification number: A61B34/20 , A61B8/4218 , A61B8/4263 , A61B10/0233 , A61B34/32 , A61B90/361 , A61B2034/2055 , A61B2034/2063 , A61B2034/2065
Abstract: An imaging self-positioning system includes a robotic actuator for manipulating an imaging tool or medical probe and a sensory component for maintaining a normal orientation above patient a treatment site. The imaging tool, typically an US probe, is grasped by an end-effector or similar actuator, and a sensory component engaged with the imaging tool senses an orientation of the tool relative to the treatment surface, and the robotic actuator disposes the imaging tool for maintaining a normal or other predetermined angular alignment with the treatment surface. The treatment surface is a patient epidermal region adjacent an imaged region for identifying anatomical features and surgical targets. A medical probe such as a biopsy needle may accompany the end-effector for movement consistent with the probe, either manually or robotically advanced towards the surgical target.
-
公开(公告)号：US20240299009A1
公开(公告)日：2024-09-12
申请号：US18667740
申请日：2024-05-17
Applicant: Worcester Polytechnic Institute
Inventor： Haichong Zhang , Shang Gao
CPC classification number: A61B8/4461 , A61B5/0095 , A61B8/12 , A61B8/445 , A61B18/1492 , A61B2017/00106 , A61B2090/3782
Abstract: A photoacoustic (PA) sensor employs a linear deployment of an illumination source and a corresponding ultrasonic receiver for defining an imaging plane for rendering a PA image of a surgical or diagnostic region. A pair of illumination sources emanates from cladding removal of respective optical fibers, and irradiates in alignment with a side firing ultrasonic (US) array for receiving the induced PA signals. The US array extends longitudinally and parallel to the illumination sources, and an overlap of the respective irradiation regions extends from the illumination sources lies within a sensing region of the US array for defining an imaging plane captured by the US sensor for rendering on a visual device, often in conjunction with an ablation antenna or diagnostic probe for providing concurrent imaging during a surgical procedure.
-
公开(公告)号：US20230099734A1
公开(公告)日：2023-03-30
申请号：US17994788
申请日：2022-11-28
Applicant: Worcester Polytechnic Institute
Inventor： Haichong Zhang , Ryosuke Tsumura , Yichuan Tang
Abstract: An ultrasonic imaging configuration rendering an image based on a reflected beam aligned with a needle insertion axis provides enhanced images and guidance. A percutaneous insertion guidance device for ultrasonic (US) imaging includes an US transducer and a reflector for redirecting imaging signals between the transducer and an imaged region. An enclosure or bracket is adapted to support the reflector at a predetermined angle based on a surgical target in the imaged region such that a forward beam direction from the transducer reflects in a direction of the needle insertion as the needle passes through a discontinuity or slot in the reflector. The resulting return signal is based on an axial alignment of the US signals with the needle travel towards the surgical target.
-
公开(公告)号：US20230023217A1
公开(公告)日：2023-01-26
申请号：US17869130
申请日：2022-07-20
Applicant: Worcester Polytechnic Institute
Inventor： Haichong Zhang , Shang Gao
IPC: A61B5/00
Abstract: A photoacoustic imaging approach identifies, concurrently with ablation therapy, an extent of the ablation by measuring and rendering a necrotic extent of treated tissue in a treatment region. Laser pulsed light directed at the treatment region induces an acoustic (ultrasound) signal for differentiating ablated tissue from its non-ablative counterpart based on a photoacoustic spectrum variation. The acoustic signal indicates a range of necrotic extent based on a quantified ablated tissue contrast and a total contrast of both necrotic and non-necrotic tissue, defined as a fraction for computing a degree of necrosis. Generation of an image indicating the degree of necrosis allows continuous or near continuous feedback for ablation therapy guidance to ensure complete and effective ablation of the proper tissue in the treatment region.
-
-
-
-
-
-
-
Search Results
8
records
(took 0.021 seconds)
