Abstract: Systems and methods execution of a magnetic resonance imaging pulse sequence including a first spin-echo echo planar imaging pulse sequence to acquire first data of a volume, a second spin-echo echo planar imaging pulse sequence comprising a first one or more diffusion gradient pulses to acquire first diffusion data of the volume, a third spin-echo echo planar imaging pulse sequence comprising a second one or more diffusion gradient pulses to acquire second diffusion data of the volume, and a fourth spin-echo echo planar imaging pulse sequence comprising a third one or more diffusion gradient pulses to acquire third diffusion data of the volume, generation of perfusion metrics based on the first data, and generation of diffusion metrics based on the first data, the first diffusion data, the second diffusion data, and the third diffusion data.

Abstract: Systems and methods execution of a magnetic resonance imaging pulse sequence including a first spin-echo echo planar imaging pulse sequence to acquire first data of a volume, a second spin-echo echo planar imaging pulse sequence comprising a first one or more diffusion gradient pulses to acquire first diffusion data of the volume, a third spin-echo echo planar imaging pulse sequence comprising a second one or more diffusion gradient pulses to acquire second diffusion data of the volume, and a fourth spin-echo echo planar imaging pulse sequence comprising a third one or more diffusion gradient pulses to acquire third diffusion data of the volume, generation of perfusion metrics based on the first data, and generation of diffusion metrics based on the first data, the first diffusion data, the second diffusion data, and the third diffusion data.

Abstract: The present disclosure is directed to systems and methods for generating images using short tau inversion recovery, ultrashort echo time (STIR-UTE) MRI sequences. The STIR-UTE MRI sequences can be used to generate images that can differentiate between regions that are at temperatures that are either lethal or non-lethal to cell life. Thus, these sequences can be beneficial for implementations such as in monitoring cryoablation procedures.

Abstract: A system includes acquisition of a predetermined number of three-dimensional sub-frames from patient tissue using a T1-weighted radial sampling sequence and without contrast agent, determination of a matching one of a plurality of the three-dimensional images reconstructed from respective subsets of the predetermined number of three-dimensional sub-frames, based on a first three-dimensional image reconstructed from a first-acquired one of the predetermined number of three-dimensional sub-frames, and subtraction of the matching one of the plurality of the three-dimensional images from the first three-dimensional image to generate a second three-dimensional image.

Abstract: A computer-implemented method for managing imaging protocols among a plurality of image scanners includes creating parent node data records, each respective parent node data record corresponding to a distinct type of image scanner. Imaging protocols are stored, each imaging protocol associated with a distinct parent node data record included in the parent node data records. Next, a child node creation process is performed for each respective image scanner. The child node creation process may include, for example: determining a respective image scanner type associated with a respective image scanner; identifying a respective parent node data record corresponding to the respective image scanner type; creating a child node data record associated with the respective parent node data record; identifying a respective imaging protocol associated with the respective parent node; and storing a copy of the respective imaging protocol at the respective scanner.

Abstract: A system includes a chassis defining a bore, a main magnet to generate a polarizing magnetic field within the bore, a gradient system to apply a gradient magnetic field to the polarizing magnetic field, a radio frequency system to apply an excitation pulse to patient tissue disposed within the bore and to receive signals from the patient tissue, and a computing system to receive the signals from the RF system.

Abstract: A computer-implemented method of performing magnetic resonance imaging with ultra-short echo time pulse sequences includes defining short T2 threshold limits for enhancement. A multi-echo ultra-short echo time response is acquired and a complex dataset is determined based on the multi-echo ultra-short echo time response. A plurality of phase components is identified from the complex dataset, wherein each phase component is associated with a T2 relaxation time within the short T2 threshold limits. A plurality of frequency components is also identified from the complex dataset, wherein each frequency component is associated with the T2 relaxation time within the short T2 threshold limits. Next, a magnitude dataset is derived from the complex dataset and a fitting algorithm is applied to the magnitude dataset to yield a plurality of magnitude components, wherein each magnitude component is associated with the T2 relaxation time within the short T2 threshold limits.

Abstract: A computer-implemented method for managing imaging protocols among a plurality of image scanners includes creating a plurality of parent node data records, each respective parent node data record corresponding to a distinct type of image scanner. A plurality of imaging protocols are stored, each imaging protocol associated with a distinct parent node data record included in the plurality of parent node data records. Next, a child node creation process is performed for each respective image scanner included in the plurality of image scanners.

Abstract: A system and method for non-contrast imaging of pulmonary blood flow in a subject are described. In some aspects, the method includes acquiring, using a magnetic resonance imaging (“MRI”) system, image data from at least the subject's lungs during which little to no respiratory motion occurs in the subject, such as during a breath-hold. The method also includes assembling the image data into a plurality of time-series datasets representing temporal variations of magnetic resonance signals in a region of interest that contains all or part of the subject's lungs. The method further includes computing a statistical blood flow metric for each voxel in the region of interest, using respective time-series datasets, and generating at least one image representative of pulmonary blood flow in the subject using the computed statistical blood flow metrics.

Abstract: A computer-implemented method of performing magnetic resonance imaging with ultra-short echo time pulse sequences includes defining short T2 threshold limits for enhancement. A multi-echo ultra-short echo time response is acquired and a complex dataset is determined based on the multi-echo ultra-short echo time response. A plurality of phase components is identified from the complex dataset, wherein each phase component is associated with a T2 relaxation time within the short T2 threshold limits. A plurality of frequency components is also identified from the complex dataset, wherein each frequency component is associated with the T2 relaxation time within the short T2 threshold limits. Next, a magnitude dataset is derived from the complex dataset and a fitting algorithm is applied to the magnitude dataset to yield a plurality of magnitude components, wherein each magnitude component is associated with the T2 relaxation time within the short T2 threshold limits.

Abstract: A system detects malignant lymph nodes using an MR imaging device, for, in the absence of a contrast agent, acquiring in a patient anatomical volume of interest including lymph nodes, (a) a first image using a variable flip angle, lymph node enhanced contrast, MR image acquisition process, (b) a second image using a susceptibility weighting imaging acquisition process and (c) a third image using a diffusion weighting imaging acquisition process. In the presence of a contrast agent absorbed by benign lymph nodes, MR imaging device acquires in the patient anatomical volume of interest, (d) a fourth image using a susceptibility weighting imaging acquisition process. A display processor processes data representing the first, second, third and fourth images for display of malignant and benign lymph nodes on a reproduction device.

Abstract: A system detects malignant lymph nodes using an MR imaging device, for, in the absence of a contrast agent, acquiring in a patient anatomical volume of interest including lymph nodes, (a) a first image using a variable flip angle, lymph node enhanced contrast, MR image acquisition process, (b) a second image using a susceptibility weighting imaging acquisition process and (c) a third image using a diffusion weighting imaging acquisition process. In the presence of a contrast agent absorbed by benign lymph nodes, MR imaging device acquires in the patient anatomical volume of interest, (d) a fourth image using a susceptibility weighting imaging acquisition process. A display processor processes data representing the first, second, third and fourth images for display of malignant and benign lymph nodes on a reproduction device.