摘要:
Systems and methods for tracking a probe during a procedure. In one embodiment, the method includes monitoring a position of the probe in an imaging region during the procedure using microwave inverse scattering and contrast source inversion. The method also includes solving for a contrast source in the imaging region using compressive sensing and group sparsity. The contrast source exists at a surface of the probe or within the probe. The method further includes imaging the contrast source and the probe by solving a linear inverse scattering problem with a group sparsity constraint. The method also includes determining a location of the probe in the imaging region during the procedure based on the imaging of the contrast source and the probe. The method further includes displaying an image of the location of the probe relative to an anatomy feature in the imaging region during the procedure.
摘要:
Systems and processes for performing posterior segment visualization and surgery assist a surgeon during surgery. Adapted instruments (I) used in ocular surgery include unique indicia, markings, or the like (40) which, when in the surgical field, can be identified by the system (Fig. 9). In turn, the system modifies the images that are projected into a display (10), e.g., a heads-up display, used by the surgeon, to display parameter data that is particular to the instrument (I) in use. The system also tracks the tip (16) of the instrument (I) in real time, determines the tissue that is closest to the instrument tip, automatically collects OCT data for that tissue, and displays images (20, 22) representative of that data in the display used by the surgeon. In this way, as the surgeon moves a surgical instrument around in the surgical field of the eye, the system automatically displays OCT image data of the tissue closest to the instrument tip.
摘要:
A device for accurately navigating at least a catheter and locating the tip of said catheter during vascular access, said device comprising: a sensor; a signal capturing mechanism to be communicably coupled with an ECG machine and said sensor in order to capture heart electrical activity in terms of sensed signals; extraction mechanisms configured to extract several information items from parameters from said sensed signal; a first computation mechanism to provide a first computed set of values; and at least a guidance mechanism to provide a set of guidance signals. The first information item is the amplitude of the P-wave and the second information item is the amplitude of the R-wave, and said first computed set of values comprises a ratio of P-wave and R-wave amplitudes. Preferably, the third information item is the change of voltage or slope of the P-wave, whereas the fourth information item is the energy of the P-wave.
摘要:
In part, the disclosure relates to intravascular data collections and generation of representations thereof include one or more view of regions associated with side branches or arteries such as a carina or bifurcation. In one embodiment, accessing a set of intravascular data stored in machine readable memory; performing side branch detection with regard to the intravascular data to identify one or more side branches; and identifying a plurality of frames for the one or more side branches is performed. An automatic viewing angle that is toggleable via a user interface is used in one embodiment.
摘要:
A forward-imaging optical coherence tomography probe is provided, comprising: a substantially cylindrical housing comprising; a longitudinal axis; an interior side; a distal end that is optically transparent; and a mirror located at the interior side, adjacent the distal end; an optical fiber located inside the cylindrical housing along the longitudinal axis; a wedge lens located inside the cylindrical housing, adjacent the distal end, the wedge lens configured to receive light from the fiber, and direct the light towards the mirror; and, at least one motor configured to both: rotate the fiber and the wedge lens about the longitudinal axis and inside the cylindrical housing; and, linearly displace the fiber and the wedge lens along the longitudinal axis and inside the cylindrical housing; the mirror configured to: receive light from the wedge lens and reflect the light out of the distal end as the wedge lens moves linearly and rotationally.
摘要:
The present invention relates to electromagnetic tracking of medical devices. In order to provide improved tracking of medical devices, a wireless readout unit (10) for an electromagnetic tracking system of medical devices is provided. The wireless readout unit comprises a data input (12), a data processor (14) and a data output (16). The data input is configured to receive raw signals (18) from an electromagnetic sensor, and the data processor is configured to at least partly pre-process the raw signals provided by the data input for further transformation. Further, the data output is configured for data transmission of the at least partly pre-processed data to a control unit of an electromagnetic tracking system of medical devices. The data output provides a wireless data link (20) to a control unit.
摘要:
Dispositif (1), adapté pour être ingéré par un patient, comprenant une matrice (12) à délitement au niveau d'un segment digestif et une pluralité de marqueurs RFID (11) passifs, indépendants et logés ensemble dans la matrice (12) à délitement, la matrice (12) à délitement étant conformée pour qu'une fois délitée, les marqueurs RFID (11) soient séparés les uns des autres et ne soient plus mécaniquement connectés, de sorte que chaque marqueur RFID (11) puisse être déplacé indépendamment des autres marqueurs RFID (11) dans plusieurs segments du système digestif du patient,les marqueurs RFID (11) présentant chacun, dans la matrice (12) à délitement, une protection hermétique par encapsulation dans un matériau biocompatible.
摘要:
This disclosure relates to localization and tracking of an object. As one example, measurement data can be stored in memory to represent measured electrical signals at each of a plurality of known measurement locations in a given coordinate system in response to an applied signal at an unknown location in the given coordinate system. A dipole model cost function has parameters representing a dipole location and moment corresponding to the applied signal. A boundary condition can be imposed on the dipole model cost function. The unknown location in the given coordinate system, corresponding to the dipole location, can then be determined based on the stored measurement data and the dipole model cost function with the boundary condition imposed thereon.