Siemens Healthcare Gmbh

Siemens Healthineers Ag

Other

Designaffairs Gmbh

George William Ferguson

Michael Koehler

Constantin Von Deuster

Dominik Paul

Flavio Carinci

Dieter Ritter

Johann Sukkau

Roman Achleitner

Martin Harder

Robert Rehner

Daniel Rinck

Uvo Hölscher

Katharina Hesels

Jonas Vollmer

Jens Thöne

Julian Wohlers

Sabine Norosinski

Felix Horn

A computer-implemented method for operating an MR facility having a main magnet unit with a patient bore. A field of view (FOV) of the MR facility, defined by a main magnetic field's homogeneity, lies within the bore. A patient bench to position the patient within the patient bore is longitudinally movable. Additionally, a local coil arrangement with at least one coil element to measure MR data is freely positionable on the patient bench and/or a patient's body to be measured with respect to the longitudinal direction. The method includes: ascertaining position information of the local coil arrangement in the longitudinal direction using a measuring device when the patient bench is partially outside the patient bore; ascertaining recording information describing the local coil arrangement's position with respect to the FOV; and automatically positioning the patient bench in the longitudinal direction at an approach position ascertained from the position and recording information.

Magnetic resonance facility operation

A trajectory is determined for inserting a patient into an MR scanner. An avatar representing specific body dimensions is provided. The avatar includes location information relating to an implant. A spatial magnetic field gradient data set relating to the scanner is provided. An avatar pose at a starting point of the trajectory is defined, and a course for the trajectory is provided. For several points on the trajectory, the corresponding magnetic field value are determined by combining the spatial magnetic field gradient data set with the avatar pose. The trajectory and/or the avatar pose are determined so that the at least one implant only passes regions within the MR scanner that are below a predetermined threshold value concerning the magnetic field gradient.

Method for determining a trajectory representing an inserting of a patient into an MR scanner

The present disclosure relates to operating an MR system in which MR signals of an object under examination are acquired in an examining region using a multi echo imaging sequence, in which an RF excitation pulse and a plurality of RF refocusing pulses are applied. The techniques include determining a first accumulated phase of a magnetization in the object under examination. Then, a second accumulated phase of the magnetization in the object under examination is determined due to concomitant magnetic fields occurring between a second pair of consecutive RF pulses. Finally, it is determined whether a deviation from the predefined relationship is larger than a threshold and, if this is the case, a measure is applied in view of the fact that the deviation is larger than the threshold.

Minimization of effects of concomitant fields in multi echo imaging

Techniques are disclosed for assisting in positioning an accessory unit on a patient for a magnetic resonance examination. Also disclosed is a magnetic resonance apparatus, which is designed to perform a method for assisting in positioning an accessory unit on a patient for a magnetic resonance examination. A corresponding computer program product is also disclosed, which is designed to perform a method for assisting in positioning an accessory unit on a patient for a magnetic resonance examination, and an electronically readable data storage medium containing the computer program.

Method for positioning of an accessory unit on a patient for a magnetic resonance examination

Techniques are disclosed for acquiring MR signals of an object under examination in an MR system using a multi echo imaging sequence. The method comprises the steps of applying an RF excitation pulse to the object to generate a transverse magnetization, applying at least two RF refocusing pulses for refocusing the transverse magnetization to generate at least two MR spin echoes for the RF excitation pulse, applying a first magnetic field gradient in a read out direction between the RF excitation pulse and the first of the at least two RF refocusing pulses, applying a second magnetic field gradient in the read out direction after each of the at least two RF refocusing pulses such that the zeroth and first gradient moment is substantially zero for the second magnetic field gradient, and acquiring the at least two MR spin echoes during the at least two second magnetic field gradients.

Minimization of signal losses in multi-echo imaging

A method includes determining a position of a local coil, a coil position, and a position of a body part of a patient, a body part position. Spacing between the coil position and the body part position is determined. An optimized MR sequence is determined. Based on the determined spacing between the coil position and the body part position, it is checked that in a subsequent MR examination of the patient, a predetermined loading threshold value (e.g., an SAR value) is not exceeded. The optimization of the MR sequence thus takes place under the boundary condition that the loading threshold value is not exceeded.

Determining a load-optimized MR sequence

In a magnetic resonance tomography (MRT) apparatus and operating method, a field of view for imaging a target object is acquired. A relative position of this field of view in relation to a receiving space of the MRT scanner, in which the target object is received, is then automatically determined. A radio-frequency (RF) pulse to be used by the MRT scanner for imaging the target object is then automatically adjusted depending on this relative position. An excitation angle produced in the field of view by the RF pulse is changed compared to the use of the corresponding unadjusted RF pulse.

Magnetic resonance apparatus and operating method with adjustment of the excitation angle dependent on data acquisition field of view

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Erlangen, Germany

George William Ferguson