公开(公告)号：US20180199852A1

公开(公告)日：2018-07-19

申请号：US15868179

申请日：2018-01-11

Applicant: DENTSPLY SIRONA Inc.

Inventor： Erich HELL ,  Volker RASCHE ,  Johannes ULRICI

IPC: A61B5/055 ,  G01R33/30 ,  G01R33/385

CPC classification number: A61B5/0555 ,  A61B5/0042 ,  G01R33/28 ,  G01R33/307 ,  G01R33/3802 ,  G01R33/381 ,  G01R33/385

Abstract: Described is an MRI machine for measuring a head area of a patient, comprising at least one primary magnetic field unit, at least one gradient coil assembly, a closed patient opening, at least one excitation coil and at least one receiver coil. In a first region, a closed patient opening of the MRI machine comprises a first inner diameter perpendicular to a center axis of the MRI machine and, in the second region, a second inner diameter, which is arranged parallel to the first inner diameter. The first inner diameter is smaller than the second inner diameter, wherein the first region at least partially comprises the head area of the patient, wherein the second region at least partially comprises a torso area of the patient. The MRI machine is arranged obliquely, wherein, in a z-direction relative to a direction of the gravitational force, the center axis of the MRI machine comprises an angle between 20° and 75°.

公开(公告)号：US20230009790A1

公开(公告)日：2023-01-12

申请号：US17780107

申请日：2020-11-27

Applicant: DENTSPLY SIRONA Inc.

Inventor： Johannes ULRICI ,  Kai STANNIGEL ,  Wolf BLECHER

IPC: A61B6/03 ,  A61B6/00

Abstract: A 3D X-ray device including an X-ray detector, an X-ray source and a computer. The X-ray detector and the X-ray source are moved about an object volume to be recorded on movement paths with a rotation of at least 185°. A number of X-ray projection images are recorded from different directions. X-rays irradiate the object volume in one of the irradiation directions and are captured by the detector. A 3D X-ray image of the object volume is calculated from the recorded X-ray projection images by a reconstruction method. The X-ray detector is arranged asymmetrically relative to a central axis through a center of rotation of the 3D X-ray device. A first fan beam and an opposite second fan beam rotated 180° form an overlap region. At least one X-ray filter is placed between the X-ray source and the object volume for attenuating an X-ray dose inside the overlap region.

公开(公告)号：US20180199853A1

公开(公告)日：2018-07-19

申请号：US15869787

申请日：2018-01-12

Applicant: DENTSPLY SIRONA Inc.

Inventor： Ciamak ABKAI ,  Tilman NIEDERFÜHR ,  Klaus STÖCKL ,  Guido SCHEIBL ,  Johannes ULRICI

IPC: A61B5/055 ,  G01R33/30

CPC classification number: A61B5/0555 ,  G01R33/28 ,  G01R33/307 ,  G01R33/38

Abstract: Disclosed herein is an MRI machine for measuring at least a portion of a head of a patient, having at least one primary magnetic field unit and at least one patient opening. The MRI machine has a patient seat, where the patient seat has adjusting means, which are driven by at least one drive means controlled by a control unit to move the patient seat into the patient opening along a travel curve as far as an imaging position, in which the head of the patient is arranged at least partially in an imaging area of the MRI machine, wherein an adjustable element is attached to the patient seat relative to the patient seat and wherein, by means of a detector apparatus, the position of the adjustable element relative to the primary magnetic field unit and/or relative to the patient seat is automatically determined on the MRI machine.

公开(公告)号：US20210003649A1

公开(公告)日：2021-01-07

申请号：US17026802

申请日：2020-09-21

Applicant: DENTSPLY SIRONA Inc.

Inventor： Volker RASCHE ,  Erich HELL ,  Johannes ULRICI

IPC: G01R33/3815 ,  G01R33/38 ,  G01R33/383 ,  A61B5/055 ,  G01R33/28 ,  G01R33/341 ,  G01R33/381

Abstract: Disclosed is a scanning device for magnetic resonance imaging for medical diagnostics, more particularly for dental-medical diagnostics or ENT diagnostics, having a main magnet for generating a static main magnetic field having a homogeneous region, and having at least one transmitting and/or receiving coil for emitting and/or receiving a radio-frequency magnetic field. Provision is made, in particular, for the main magnet to be formed by two poles of magnetically opposite polarities at the end side, such that the static main magnetic field generated by the two poles at the end sides thereof, including the homogeneous region, projects beyond the end sides of the poles.

公开(公告)号：US20180165800A1

公开(公告)日：2018-06-14

申请号：US15571073

申请日：2016-05-09

Applicant: DENTSPLY SIRONA inc.

Inventor： Johannes ULRICI ,  Ulrich SCHULZE-GANZLIN ,  Ciamak ABKAI

IPC: G06T5/00 ,  G06T7/30 ,  G06T11/00 ,  G06T7/00

CPC classification number: G06T5/006 ,  G06T3/4053 ,  G06T7/0012 ,  G06T7/30 ,  G06T11/005 ,  G06T2200/04 ,  G06T2207/10072 ,  G06T2207/10116 ,  G06T2207/30036

Abstract: In a method for image enhancement of image data of a dental image generation system, comprising a first image generating unit (205, 210) for producing two-dimensional image data and a second image generating unit (250, 255) for producing three-dimensional image data, wherein for an object to be examined (220, 222) the image generation system provides both two-dimensional image data and three-dimensional image data, it is in particular provided that the two-dimensional image data and the three-dimensional image data are merged in such a way that the image quality and/or the information content of the two-dimensional image data or of the three-dimensional image data is improved.

公开(公告)号：US20240374141A1

公开(公告)日：2024-11-14

申请号：US18692594

申请日：2022-08-22

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

Inventor： Andreas GREISER ,  Edgar MUELLER ,  Lars LAUER ,  Stephan BIBER ,  Mario ZELLER ,  Matthias GEBHARDT ,  Johannes ULRICI ,  Stefan WUNDRAK ,  Titus LANZ ,  Florian ODOJ ,  Tobias WICHMANN ,  Joerg ROTHARD ,  Sebastian DENNERT ,  Marco GEISSNER

IPC: A61B5/00 ,  A61B5/055 ,  G01R33/34

Abstract: A dental coil comprises a first element and a second element. The first element is composed of a dimensionally stable material and has a recess that is configured to receive at least one of a mouth region or a nose region of a patient when the dental coil is positioned on the jaw region of the patient during use. The second element has a flexible element that is configured to allow the flexible element to take the shape of the jaw region of the patient. The first element and the second element have an antenna configured to receive high-frequency signals in a frequency and power range of a magnetic resonance measurement.