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公开(公告)号：US12078696B2
公开(公告)日：2024-09-03
申请号：US17938465
申请日：2022-10-06
发明人： Xiaoli Zhao , Kang Wang , Hua Li , Zhenghui Zhang , Florian Wiesinger , Ty A. Cashen , Rolf Schulte
IPC分类号： G01V3/00 , A61B5/055 , G01R33/20 , G01R33/561
CPC分类号： G01R33/20 , A61B5/055 , G01R33/5611
摘要： A method for generating an image of an object with a magnetic resonance imaging (MM) system is presented. The method includes first performing a calibration scan of the object. The calibration scan is performed with a zero echo time (ZTE) radial sampling scheme to obtain calibration k-spaces for surface coil elements and a body coil of the MRI system. The calibration scan is performed in such a manner that the endpoints of calibration k-space lines in each calibration k-space follow a spiral path. A plurality of calibration parameters are then obtained from the plurality of calibration k-spaces. A second scan of the object is then performed to acquire the MR image data. The image of the object is then generated based on the plurality of calibration parameters and the MR image data.
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公开(公告)号：US20240215848A1
公开(公告)日：2024-07-04
申请号：US18090131
申请日：2022-12-28
发明人： Florian Wiesinger , Dattesh Dayanand Shanbhag , Kavitha Manickam , Harsh Kumar Agarwal , Dawei Gui , Chitresh Bhushan
CPC分类号： A61B5/055 , G01R33/58 , G01R33/543
摘要： A method for performing a scan of a subject utilizing a magnetic resonance imaging (MRI) system includes triggering a prescan by an MRI scanner of the MRI system upon the subject being setup on a table of the MRI scanner and the table reaching an iso-center of the MRI scanner. The method includes subsequent to the prescan, triggering a calibration scan of the subject with the MRI scanner, wherein the calibration scan is an acoustic noise suppressed MRI scan. The method includes obtaining calibration data from the calibration scan. The method includes obtaining prescription parameters for subsequent scans of the subject with the MRI scanner from the calibration data. The method includes triggering at least one scan of the subject with the MRI scanner based on the prescription parameters.
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3.发明公开公开(公告)号：US20240257414A1
公开(公告)日：2024-08-01
申请号：US18102834
申请日：2023-01-30
CPC分类号： G06T11/008 , G01R33/4824 , G01R33/5608 , G06N3/08 , G06T2210/41
摘要： A computer-implemented method for generating a chemical shift artifact corrected reconstructed image from magnetic resonance imaging (MRI) data includes inputting into a trained deep neural network an image generated from the MRI data acquired during a non-Cartesian MRI scan of a subject. The method also includes utilizing the trained deep neural network to generate the chemical shift artifact corrected reconstructed image from the image, wherein the trained deep neural network was trained utilizing a tissue mixing model that models interactions between different tissue types to mitigate chemical shift artifacts. The method further includes outputting from the trained deep neural network the chemical shift artifact corrected reconstructed image.
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公开(公告)号：US20230306601A1
公开(公告)日：2023-09-28
申请号：US17656171
申请日：2022-03-23
发明人： László Ruskó , Vanda Czipczer , Bernadett Kolozsvári , Richárd Zsámboki , Tao Tan , Balázs Péter Cziria , Attila Márk Rádics , Lehel Ferenczi , Fei Mian , Hongxiang YI , Florian Wiesinger
CPC分类号： G06T7/11 , G06T7/0012 , G06T7/12 , G06T11/203 , G06T11/001 , G16H30/40 , G16H30/20 , G06T2207/30168
摘要： Methods and systems are provided for segmenting structures in medical images. In one embodiment, a method includes receiving an input dataset including a set of medical images, a structure list specifying a set of structures to be segmented, and a segmentation protocol, performing an input check on the input dataset, determining whether each medical image of the set of medical images has passed the input check and removing any medical images from the set of medical images that do not pass the input check to form a final set of medical images, segmenting each structure from the structure list using one or more segmentation models and the final set of medical images, receiving a set of segmentations output from the one or more segmentation models, processing the set of segmentations to generate a final set of segmentations, and displaying and/or saving in memory the final set of segmentations.
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公开(公告)号：US20220099776A1
公开(公告)日：2022-03-31
申请号：US17038698
申请日：2020-09-30
发明人： Florian Wiesinger , Ana Beatriz Solana Sanchez , Brice Fernandez , Peder Larson , Andrew Leynes
IPC分类号： G01R33/561 , G01R33/56 , G01R33/48
摘要： A magnetic resonance (MR) dynamically imaging method is provided. The method includes acquiring a functional MR dataset including frames of k-space datasets, while a functional stimulus is applied to the subject. Acquiring the functional MR dataset includes, acquiring a frame of k-space datasets by setting an orientation as an initial angle, and acquiring a free induction decay (FID) dataset. Acquiring an FID dataset includes applying a sequence of gradients, each gradient of the sequence corresponding to a k-space spoke, wherein the sequence of k-space spokes define a k-space segment having the orientation in a 3D k-space volume. Acquiring a frame of k-space datasets also includes acquiring a gradient echo dataset corresponding to the FID dataset, and updating the orientation as golden angles. The method also includes generating anatomical MR images and functional images based on the functional MR dataset.
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公开(公告)号：US11275142B1
公开(公告)日：2022-03-15
申请号：US17090557
申请日：2020-11-05
发明人： Florian Wiesinger , Ana Beatriz Solana Sanchez , Anne Menini , Emil Albert Ljungberg , Tobias Charles Wood , Gareth John Barker , Steven Charles Williams
IPC分类号： G01R33/565 , G01R33/56 , G01R33/567 , G06T11/00 , G01R33/48
摘要： A method for generating motion-corrected medical images includes obtaining, via a processor, k-space data of a region of interest acquired by a magnetic resonance imaging system utilizing a 3D radial pulse sequence with ZTE acquisition including optional magnetization preparation pulses. The method also includes sampling, via the processor, the k-space data to obtain a plurality of interleaved k-space segments. The method further includes reconstructing, via the processor, one or more interleaved k-space segments of the plurality of interleaved k-space segments to generate a respective motion navigator volume. The method even further includes co-registering, via the processor, each respective motion navigator volume to estimate motion and performing motion correction on the one or more interleaved k-space segments and their corresponding k-space trajectories. The method still further includes generating, via the processor, a motion-corrected volume from all of the motion corrected interleaved k-space segments and their corresponding motion corrected k-space trajectories.
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公开(公告)号：US20210181282A1
公开(公告)日：2021-06-17
申请号：US17101908
申请日：2020-11-23
发明人： Timothy W. Deller , Florian Wiesinger , Floribertus P. Heukensfeldt Jansen , Anja C.S. Brau , Kristen Ann Wangerin
摘要： A method of controlling and processing data from a hybrid PET-MR imaging system includes acquiring a positron emission tomographic (PET) dataset over a time period, wherein the PET dataset is affected by a quasi-periodic motion of the patient, and acquiring magnetic resonance (MR) data during the time period such that the acquisition time of the MR data relative to the PET dataset is known. A characteristic of the patient motion is then determined based on the PET dataset and the MR data is processed based on the characteristic of patient motion.
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公开(公告)号：US20210088612A1
公开(公告)日：2021-03-25
申请号：US16578677
申请日：2019-09-23
IPC分类号： G01R33/48 , G01R33/44 , G01R33/36 , G01R33/561
摘要： Systems and methods for ZTE MRI are disclosed. An exemplary method includes obtaining Larmor frequencies of water and/or fat for a region of interest of a subject to be imaged at a pre-scan and setting a center frequency for an RF transceiver of the MR system at a value between the Larmor frequencies of water and fat. A ZTE pulse sequence is applied to the subject and MR signals in response to the ZTE pulse sequence are received from the subject. The received MR signals are demodulated with the center frequency and an in-phase ZTE image is generated from the demodulated MR signals.
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公开(公告)号：US20240118356A1
公开(公告)日：2024-04-11
申请号：US17938465
申请日：2022-10-06
发明人： Xiaoli Zhao , Kang Wang , Hua Li , Zhenghui Zhang , Florian Wiesinger , Ty A. Cashen , Rolf Schulte
CPC分类号： G01R33/20 , A61B5/055 , G01R33/5611
摘要： A method for generating an image of an object with a magnetic resonance imaging (MM) system is presented. The method includes first performing a calibration scan of the object. The calibration scan is performed with a zero echo time (ZTE) radial sampling scheme to obtain calibration k-spaces for surface coil elements and a body coil of the MRI system. The calibration scan is performed in such a manner that the endpoints of calibration k-space lines in each calibration k-space follow a spiral path. A plurality of calibration parameters are then obtained from the plurality of calibration k-spaces. A second scan of the object is then performed to acquire the MR image data. The image of the object is then generated based on the plurality of calibration parameters and the MR image data.
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公开(公告)号：US11686797B2
公开(公告)日：2023-06-27
申请号：US17101908
申请日：2020-11-23
发明人： Timothy W. Deller , Florian Wiesinger , Floribertus P. Heukensfeldt Jansen , Anja C. S. Brau , Kristen Ann Wangerin
IPC分类号： G01R33/48 , G01T1/29 , G01R33/567
CPC分类号： G01R33/481 , G01T1/2985 , G01R33/5676
摘要： A method of controlling and processing data from a hybrid PET-MR imaging system includes acquiring a positron emission tomographic (PET) dataset over a time period, wherein the PET dataset is affected by a quasi-periodic motion of the patient, and acquiring magnetic resonance (MR) data during the time period such that the acquisition time of the MR data relative to the PET dataset is known. A characteristic of the patient motion is then determined based on the PET dataset and the MR data is processed based on the characteristic of patient motion.
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