Siemens Aktiengesellschaft

Siemens Medical Solutions Usa, Inc.

Katrin Wohlfarth

Thorsten Feiweier

Martin Harder

Andreas Schmidt

Dominik Paul

Berthold Kiefer

Stephan Kannengiesser

Swen Campagna

Josef Pfeuffer

Bernd Kuehn

Peter Heubes

Christof Krellmann

Cecile Mohr

Wilfried Landschuetz

Rainer Kaim

John Kirsch

Elisabeth Preusche

In a method and a magnetic resonance (MR) system, a marked area is determined that demarcates a predetermined volume segment of the subject relative to the regions adjacent thereto. Nuclei in the predetermined volume segment are excited, or nuclei in a region adjacent thereto are saturated with an RF excitation pulse at the same time a magnetic field gradient is activated. The center frequency of a frequency range of the RF excitation pulse and the direction of the magnetic field gradient are adjusted dependent on resonant frequencies of substances present within the predetermined volume segment in order, starting from the predetermined volume segment to shift an actual excitation volume segment excited by the RF excitation pulse toward the marked area, or to shift a saturation volume saturated by the RF excitation pulse away from the marked area. MR data are then acquired from the predetermined volume segment.

Method and magnetic resonance system to acquire MR data in a predetermined volume segment of an examination subject

In a method and apparatus to generate a magnetic resonance (MR) image in a volume of interest of an examination subject, the magnetization is excited in an additional volume in the subject by at least one RF pulse, in order to achieve a desired magnetization in the volume of interest. The additional excitation volume differs at least partially from the volume of interest. For this purpose, at least one MR overview image of the examination subject is analyzed automatically to determine a position of at least one anatomical structure of the examination subject, from which the volume of interest is automatically determined. The additional excitation volume is automatically determined using the position of the at least one anatomical structure. The MR image in the volume of interest is acquired with excitation of the magnetization in the automatically determined additional excitation volume.

Method and apparatus to generate magnetic resonance images

An inventive cooling device for the air conditioning of an examination area of a medical examination device includes a temperature detection device for detecting a temperature in the examination area, an air conditioning device for producing air-conditioned air, an air discharge device arranged within the examination area, an opening directed toward the examination area to let out air-conditioned air and an air duct to transport air-conditioned air to the opening in the air discharge device and a control unit connected to the temperature detection device and the air-conditioning device to control the air-conditioning device based on data detected by the temperature detection device. The cooling device automatically determines and regulates a temperature in the examination area with fresh, air-conditioned air which has a positive influence on the well-being of the patient in the examination area.

Cooling device for the air conditioning of an examination area of a medical examination apparatus and medical examination apparatus comprising a cooling device

In a method for operation of a magnetic resonance apparatus having a patient positioning table with a tabletop as well as a control device by which the displacement of the tabletop relative to a homogeneous magnetic field (generated by a magnetic field generation device) and the acquisition of images of an anatomical subject of the patient in a field of view within the homogeneous magnetic field are controlled, the control device determines a suitable stepped displacement of the tabletop using information about the patient size, information about the subject to be acquired and information about the size of the homogeneous magnetic field and/or field of view present relative to the table displacement direction, and the control device controls the tabletop displacement as needed according to the determination result.

Method and apparatus for automatically controlling tabletop displacement in magnetic resonance imaging

In a method for operation of a magnetic resonance system, at least one control device is fashioned for image data acquisition and corresponding components, and only three first control parameters defining primary boundary conditions are selected by an operator of the system, namely the contrast response, the spatial orientation of the at least one image data set to be acquired and the examination organ. Additional, second control parameters, required to control the components for image acquisition and defining secondary boundary conditions, are automatically determined by the control device using the first control parameters.

Streamlined diagnostic MR imaging requiring only three control parameters of operator selected boundary conditions

A surface coil arrangement of a gradient system for an MR tomography apparatus has coil elements mounted on a first antenna, the antenna being extendable by at least one further antenna that likewise includes an arrangement of at least one coil element, and which is detachably or movably fastened to the first antenna.

Surface coil arrangement for magnetic resonance tomographs

In a method for implementation of a magnetic resonance examination of a patient with an imaging medical magnetic resonance apparatus with a movable patient bed, for of an examination volume of the patient that is larger than an acquisition volume of the magnetic resonance apparatus, anatomical patient information and second technical information for setting the magnetic resonance apparatus are acquired dependent on the position of the patient bed from magnetic resonance signals acquired in a low-resolution calibration measurement (scan). A first group of measurement protocol parameters is generated from the patient information and a second group of measurement protocol parameters is generated from the technical information, to generate a measurement protocol for a subsequent high-resolution magnetic resonance examination.

Growing community of inventors

Erlangen, Germany

Katrin Wohlfarth