Koninklijke Philips Corporation N.v.

Tobias Ratko Voigt

Ulrich Wolfgang Katscher

Hanno Heyke Homann

Andrea Jane Wiethoff

Steffen Weiss

Peter Boernert

Paul Royston Harvey

Sascha Krueger

Christian Findeklee

Eberhard Sebastian Hansis

Kay Nehrke

Ingmar Graesslin

Christian Stehning

Stefanie Remmele

Tobias Richard Schaeffter

Thomas Hendrik Rozijn

Olaf Dössel

Eike Caspar Cornelius Nagel

Sebastian Alfred Seitz

Wei Liu

Valentina Otja Puntmann

Markus Olaf Samuel Henningsson

A method for differentiation of normal myocardium from diffuse disease using T mapping includes acquiring one or more images of a patient by an imaging apparatus, generating a T1 map from the one or more images, defining a region of interest within the one or more images, determining the average T1 value within the region of interest, comparing the average T1 value within the region of interest to a cut-off T1 value, and determining a diagnosis of the region of interest from the comparison.

System and method for differentiation of normal myocardium from diffuse disease using T1 mapping in non-ischemic cardiomyopathies and others

The present invention provides a method for magnetic resonance (MR) imaging of a region of interest () of a subject of interest () under application of a scanning sequence () comprising at least one pre-pulse () and multiple readouts (), whereby the multiple readouts () are performed after the at least one pre-pulse () with different configurations causing different image contrasts, comprising the steps of performing a preparation phase comprising applying at least one scanning sequence () to provide a set of reference readouts () using the different configurations, and generating a set of navigator images () with one navigator image () of the region of interest () for each configuration of the reference readouts (), performing an examination phase comprising applying at least one scanning sequence (), whereby at least one image () of the region of interest () is generated for each scanning sequence (), determining motion of the subject of interest () by comparing at least one image () of the scanning sequence of the examination phase to the navigator image () having the same configuration as the compared image (), performing motion correction of the at least one image () based on the determined motion of the subject of interest () of the at least one image (), and providing an MR scan () of the region of interest () of the subject of interest () based on the images () after performing motion correction. The invention also provides a MR imaging system () adapted to perform the above method and a software package for upgrading a MR imaging system (), whereby the software package contains instructions for controlling the MR imaging system () according to the above method.

Magnetic resonance imaging with motion correction suing pre-pulses and navigators

A method for determining wall thickness of an anatomic detail (), in particular of the heart, of a subject of interest () by magnetic resonance imaging includes: defining () a first location () and a second location () on a surface representation; &#x2014;generating () a line-structure of interest (), &#x2014;determining (), for each location () of a plurality of locations (), a normal direction (); &#x2014;determining () a mean normal direction (); &#x2014;determining () a mean imaging plane (); &#x2014;determining () a measure that is representative of angular deviations () of the determined normal directions (); &#x2014;based on the determined measure, determining () imaging planes (); &#x2014;determining () deviations of the determined normal directions () to the imaging planes (); &#x2014;acquiring () magnetic resonance images for all imaging planes (); and &#x2014;determining () the wall thickness at a specific location () from the magnetic resonance image acquired in the imaging plane () that has the lowest angular deviation to the normal direction () at the specific location (). A magnetic resonance imaging system () has a controller () configured to carry out steps (-) of the method. A software module () carries out the method by implementing program code from a memory () and executed by a processor () of the magnetic resonance imaging system ().

Method of scan geometry planning for determining wall thickness of an anatomic detail using magnetic resonance imaging

A magnetic resonance imaging system () acquires magnetic resonance data () from a subject () that may include an electrically conductive object (e.g. an implant or a medical device). The magnetic resonance imaging system includes a radio-frequency transmitter () for generating a radio-frequency transmit field for acquiring the magnetic resonance data using a radio-frequency antenna (). The radio-frequency transmitter has multiple transmit channels. The radio-frequency antenna comprises multiple antenna elements () each adapted to connect to an antenna element. The amplitude and phase values of the RF transmit field of each of the transmit channels can be selected such that the magnetic field generated by the RF antenna is minimized at the location of the electrically conductive object, thereby reducing RF heating of the object.

Reducing the radio-frequency transmit field in a predetermined volume during magnetic resonance imaging

A magnetic resonance method of electric properties tomography imaging of an object includes applying an excitation RF field to the object via a coil at a first spatial coil position (), acquiring resulting magnetic resonance signals via a receiving channel from the object, determining from the acquired magnetic resonance signals a first phase distribution and a first amplitude of a given magnetic field component of the excitation RF field of the coil at the first coil position (), repeating these steps with a coil at a second different spatial coil position (), to obtain a second phase distribution, determining a phase difference between the first and second phase distribution, determining a first and a second complex permittivity of the object, the first complex permittivity comprising the first amplitude of the given magnetic field component and the second complex permittivity comprising the second amplitude of the given magnetic field component and the phase difference, equating the first complex permittivity and the second complex permittivity for receiving a final equation and determining from the final equation a phase of the given magnetic field component for the first coil position ().

Electric properties tomography imaging method and system

The invention relates to a magnetic resonance imaging method for simultaneous and dynamic determination of a longitudinal relaxation time Tand a transversal relaxation time Tof the nuclear spin system of an object, in the context of DCE or DSE MRI. In this respect, the invention makes use of a steady-state gradient echo pulse sequence comprising an EPI readout module.

Simultaneous and dynamic determination of longitudinal and transversal relaxation times of a nuclear spin system

A medical imaging system () includes a data store (), a clustering module (), and a display device (). The data store () includes a first imaging data set and a second imaging data set, each data set created with the same imaging device () and the same measured value. The measured value of a first and a second tissue type overlap in the first imaging data set. The measured value of the second and a third tissue type overlap in the second data set. The data sets are co-registered, and an external event changes the measured value of the second data set. The clustering module () classifies the tissue type based on a fuzzy clustering of the measured value of the first data set and the measured value of the second data set for each location. The display device () displays a medical image which contrasts each classified tissue type.

Automated detection of area at risk using quantitative T1 mapping

A method and system for calculating a local specific energy absorption rate (SAR) is based on an electric parameter and the mass density of a segmented geometry of an object and a magnetic field vector distribution of a radio frequency (RF) antenna. The values of the electric parameter and the mass density are pre-determined values, while the magnetic field vector distribution is estimated by a magnetic field mapping method based on a magnetic resonance (MR) scan, such as a Bmapping method.

Method for calculating local specific energy absorption rate (SAR) in nuclear magnetic resonance

A magnetic resonance method includes performing a plurality of magnetic resonance excitation operations each using a different sub-set of a set of radio frequency transmit coils (), each sub-set including more than one radio frequency transmit coil, acquiring magnetic resonance data responsive to each said magnetic resonance excitation operation, and computing a B1 or flip angle map for each radio frequency transmit coil of the set of radio frequency transmit coils based on the acquired magnetic resonance data. A magnetic resonance method includes performing an actual flip angle mapping (AFI) sequence using a radio frequency transmit coil () with a ratio TR:TRof the TR times of the AFI sequence selected to be rational, acquiring magnetic resonance data responsive to said AFI sequence, and computing a B1 or flip angle map for the radio frequency transmit coil based on the acquired magnetic resonance data.

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London, United Kingdom

Tobias Ratko Voigt