EFFICIENT AUTOMATIC FINDING OF MINIMAL EAR-NOSE-THROAT (ENT) PATH FOR PROBE

    公开(公告)号:US20210401500A1

    公开(公告)日:2021-12-30

    申请号:US16914696

    申请日:2020-06-29

    IPC分类号: A61B34/10 A61B34/20 A61B90/00

    摘要: A method includes receiving a medical imaging scan of at least a part of a body of a patient. Voxels of the scan are identified, that correspond to regions in the body that are traversable by a probe inserted therein. The scan is displayed on a screen and selected termination and start points for the probe are marked thereon. Using a processor, a backward path is found from the termination point to the start point comprising a connected set of the identified voxels. The backward path is visualized on the screen in association with the scan.

    Registration of frames of reference

    公开(公告)号:US11123144B2

    公开(公告)日:2021-09-21

    申请号:US16748993

    申请日:2020-01-22

    摘要: Apparatus, including a patient tracker, attached to a subject, having magnetic field sensors and optical landmarks with known spatial relationships to each other. A camera acquires a 3D optical image, in a first frame of reference (FOR), of the subject's face. A magnetic radiator assembly generates magnetic fields at the subject's head, thereby defining a second FOR. A processor: processes field sensor signals to acquire location coordinates of the sensors in the second FOR; segments a tomographic image of the subject, having a third FOR, to identify the subject's face in the third FOR; computes a first transformation between the third and first FORs to map the tomographic face image to the 3D optical image; maps the optical landmarks to the third FOR; maps the respective location coordinates of the sensors to the first FOR; and computes a second transformation between the second FOR and the third FOR.

    Calibration of a rigid ENT tool
    3.
    发明授权

    公开(公告)号:US11065064B2

    公开(公告)日:2021-07-20

    申请号:US15812059

    申请日:2017-11-14

    摘要: An apparatus, including a magnetic field generator, a first magnetic field sensor configured for attachment to a proximal end of a surgical tool configured for insertion into a body, and a calibration device that includes a second magnetic field sensor and a proximity sensor, wherein the field sensors generate respective location signals responsive to a magnetic field emanating from the generator and traversing the field sensors. The apparatus includes a control unit, which receives the signals from all the sensors, extracts respective location and orientation coordinates of the field sensors based on the signals, computes a conversion relation between the coordinates of the first sensor and a distal end of the tool that is brought into contact with the calibration device, and subsequently applies the conversion relation, together with the coordinates of the first sensor, in providing a visual indication of a location of the distal end inside the body.

    ENT Image Registration
    8.
    发明申请

    公开(公告)号:US20190046272A1

    公开(公告)日:2019-02-14

    申请号:US15674380

    申请日:2017-08-10

    IPC分类号: A61B34/20 G06T7/73

    摘要: A method, including receiving a computerized tomography (CT) image of voxels of a subject's head, and analyzing the image to identify respective locations of the subject's eyes in the image, so defining a first line segment joining the respective locations. The method includes identifying a voxel subset overlaying bony sections of the head, lying on a second line segment parallel to the first line segment and on a third line segment orthogonal to the first line segment. A magnetic tracking system configured to measure positions on the subject's head is activated, and a probe, operative in the system, is positioned in proximity to the bony sections to measure positions of a surface of the head overlaying the bony sections. A correspondence between the positions and the voxel subset is formed, and a registration between the CT image and the magnetic tracking system is generated in response to the correspondence.