公开(公告)号：US20240354944A1

公开(公告)日：2024-10-24

申请号：US18640187

申请日：2024-04-19

Applicant: Siemens Healthineers AG ,  Dentsply Sirona Inc. ,  SIRONA Dental Systems GmbH

Inventor： Lars Lauer ,  Andreas Greiser ,  Kim Burzan ,  Stefan Wundrak ,  Johannes Ulrici ,  Tim Braun

IPC: G06T7/00 ,  G06T3/40

CPC classification number: G06T7/0012 ,  G06T3/40 ,  G06T2207/10088 ,  G06T2207/30036

Abstract: A magnetic resonance system may include a magnetic resonance device, an optical imaging device, and a controller. The controller may control the magnetic resonance device to acquire magnetic resonance image data from an object inside an oral cavity of a patient and/or control the optical imaging device to acquire optical data from the object inside the oral cavity of the patient. The controller (e.g., a processor of the controller) may merge the optical data with the magnetic resonance image data.

公开(公告)号：US20240393414A1

公开(公告)日：2024-11-28

申请号：US18692498

申请日：2022-08-19

Applicant: SIEMENS HEALTHINEERS AG ,  Dentsply Sirona Inc. ,  SIRONA Dental Systems GmbH

Inventor： Andreas Greiser ,  Stefan Wundrak ,  Titus Lanz ,  Stephan Biber

IPC: G01R33/3415 ,  G01R33/34 ,  G01R33/36 ,  G01R33/54

Abstract: A local coil may have a mounting, at least one antenna, and a flexible element. The mounting may position the local coil in a specified position relative to the head of a patient, where the antenna may receive high-frequency signals in a frequency and power range of a magnetic resonance (MR) measurement. The flexible element may at least partly form the local coil on the surface contour of the patient's head. The local coil may at least partly surround the patient's head when the local coil is positioned during use, and a section of the local coil including the antenna can be positioned on the patient's temporomandibular joint using the mounting. The local coil may receive MR signals of the temporomandibular joint using the antenna. A MR device may include the local coil and detect MR signals of a region of the patient using the local coil.

公开(公告)号：US12115017B2

公开(公告)日：2024-10-15

申请号：US17602306

申请日：2020-04-17

Applicant: DENTSPLY SIRONA Inc.

Inventor： Susanne Maur ,  Stefan Wundrak

IPC: A61B6/58 ,  A61B6/00 ,  A61B6/03 ,  A61B6/40 ,  A61B6/51 ,  G06T11/00

CPC classification number: A61B6/583 ,  A61B6/032 ,  A61B6/4085 ,  A61B6/51 ,  A61B6/5205 ,  A61B6/5258 ,  G06T11/005 ,  G06T2210/41

Abstract: A method of x-ray projection geometry calibration in x-ray cone beam computed tomography, including: at least one step (S1) of obtaining two-dimensional x-ray images or a sinogram of at least a part of an object, generated through relatively rotating around the object a detector and an x-ray source projecting x-rays towards the detector; further including: at least one step (S4) of detecting in the two dimensional x-ray images or the sinogram at least one feature of the object by using a trained artificial intelligence algorithm; and at least one step of creating, based on the detection, calibration information which defines the geometry of the x-ray projection.

公开(公告)号：US11116444B2

公开(公告)日：2021-09-14

申请号：US16466316

申请日：2017-12-06

Applicant: DENTSPLY SIRONA inc.

Inventor： Volker Rasche ,  Stefan Wundrak

IPC: A61B5/00 ,  A61B90/00 ,  A61B5/055 ,  A61B5/11 ,  A61B6/00 ,  A61C19/045 ,  G01R33/56 ,  G01R33/563 ,  G01R33/58

Abstract: Described is a method for detecting and displaying the movement of a temporomandibular joint which connects a lower jaw and an upper jaw by magnetic resonance imaging. A marker is secured to the lower jaw, a marker movement curve is generated using magnetic resonance imaging measurement data sets during a first measurement interval, during which the lower jaw is moved relative to the upper jaw, and a point which corresponds to a first position of the lower jaw relative to the upper jaw is ascertained on the movement curve. An image data set is generated during a second measurement interval, during which the temporomandibular joint is not moved, and a first model, which represents at least one part of the upper jaw and/or a temporal bone part that comprises the temporomandibular joint socket, and a second model, which represents at least one part of the lower jaw, are ascertained therefrom. A movement curve of the second model relative to the first model is calculated and displayed using the marker movement curve.

公开(公告)号：US10386437B2

公开(公告)日：2019-08-20

申请号：US15517282

申请日：2015-10-07

Applicant: DENTSPLY SIRONA inc.

Inventor： Stefan Wundrak ,  Volker Rasche

IPC: G01R33/56 ,  G01R33/561 ,  G01R33/48 ,  G01R33/565

Abstract: Disclosed herein is a method for generating an MRI image in which a radial or spiral k-chamber path with a constant angular increment Psi is used to take an MRI image, the angular increment Psi being in the angular range of between 5-55 degrees or being in the corresponding supplementary angle Psi′ and is selected according to the formula PsiN,M=pi/(N+1/(M+tau−1)). Alternatively, for an angular increment Psi which deviates from the angle increment of the optimal distribution of n radial profiles Psiopt=180°/n, the minimum scanning efficiency of the angular increment Psi for n>21 profiles is greater than 0.95, the angular increment Psi is in an angular range of 5° to less than 68.7537°, in particular between 5-55 degrees or in the corresponding supplementary angle Psi′. Compared to the arrangement of the radial or spiral profile using the golden angle of 111.24°, the angle increments calculated according to the above formula lead to lower eddy current artifacts, for example during the use of a b-SSFP-pulse sequence.