A system and method to analyze image data. The image data may be used to assist in determine the presence of a feature in the image. The feature may include a bubble.

In one aspect, in accordance with one embodiment, a method includes acquiring magnetic resonance (MR) data corresponding to bone tissue in an area of interest of a subject that is heated from the application of localized energy. The acquiring includes applying a three-dimensional (3D) ultra-short echo time (UTE) spiral acquisition sequence. The method also includes detecting, from the acquired magnetic resonance data, a change in MR response signal due to a change in at least one of relaxation rate and magnetization density caused by heating of the bone tissue; and determining, based at least in part on the change in the MR response signal, that the temperature of the bone tissue has changed.

A method for producing an image of a subject using a magnetic resonance imaging (MRI) system includes acquiring a series of echo signals by sampling k-space along radial lines that each pass through the center of k-space. Each projection of the radial lines is divided into multiple echoes and successive projections are spaced by a predetermined angular distance. The series of echo signals are reconstructed into a plurality of images, wherein each image corresponds to a distinct echo signal.

In magnetic resonance (MR) thermometry, first and second magnetic resonance data that are acquired sequentially, from which a phase shift is determined between a measurement phase and a reference phase. In a first region of an examined person, the measurement phase is determined from the second magnetic resonance data and the reference phase is determined from the first magnetic resonance data. In a second region of the examined person, both the reference phase and measurement phase are determined from the second magnetic resonance data. Techniques for reference-based magnetic resonance thermometry and reference-free magnetic resonance thermometry can be applied.

Thermography of an ablation site is carried out by navigating a probe into contact with target tissue in the heart, obtaining a first position of a position sensor in the probe and acquiring a first magnetic resonance thermometry image of the target tissue. The method is further carried out during ablation by iteratively reading the position sensor to obtain second positions, and acquiring a new magnetic resonance thermometry image of the target tissue when the distance between the first position and one of the second positions is less than a predetermined distance. The images are analyzed to determine the temperature of the target tissue.

The present application provides a magnetic resonance imaging scan method, a magnetic resonance imaging system, and a non-transitory computer-readable storage medium. The magnetic resonance imaging scan method comprises indicating in real time values of parameters associated with an implant device in a tested object and safety status of one or a plurality of the parameters during performing an imaging scan.

Devices and systems used to ablate tissue of a tumor using laser energy are disclosed. The devices and systems include a laser probe and a magnetic resonance (MR) safe temperature probe. The MR safe temperature probe includes an optical sensor. A bone anchor fixture separates the laser probe and the MR safe temperature probe to prevent interference in the MR safe temperature probe data. Proton Resonance Frequency (PRF) thermometry is used to model a temperature of a pixel of an MR image located adjacent the optical sensor. The modeled pixel temperature and the measured temperature are compared and monitored. Exceeding a threshold difference value causes an intervening action to occur.

In one aspect, a method comprises: receiving data indicative of at least one phase image captured using a magnetic resonance imaging (MRI) device during delivery of thermal therapy by a thermal therapy applicator to a target volume within a patient's body; and processing said at least one phase image; wherein said processing said at least one phase image comprises: applying a first mask; applying phase unwrap; and applying a second mask.

Systems and methods provide accelerated MR thermometry utilizing prior knowledge about the images to be reconstructed from incomplete k-space data, thereby facilitating accurate reconstruction. In various embodiments, missing data is computationally estimated using a machine learning algorithm such as a neural network, and an image is generated based on iteratively updated estimated missing information.

An MRI phantom for calibrated anisotropic imaging includes a plurality of separate sheathed taxons or integral taxons sharing common taxon walls, wherein each taxon has an inner diameter of less than 2 microns. The taxons form taxon filaments that are combined to form taxon ribbons. The taxons may have an average inner diameter of less than 1 micron, specifically about 0.8 microns with a packing density of about 1,000,000 per square millimeter. The filaments may include structural features such as an outer frame and crossing support ribs and may further include a visible alignment feature that allows for verifying orientation of an individual filament. The taxons may be formed as taxon fibers manufactured using a bi or tri-component textile/polymer manufacturing process. An anisotropic homogeneity phantom may include frame members that support fiber tracks extending in orthogonal directions, wherein each fiber track is formed of taxons.