Abstract:
A medical imaging system for illuminating tissue samples using three-dimensional structured illumination microscopy in port-based surgery is provided. The system comprises: an image sensor; a mirror device; zoom optics; a light modulator; a processor; and collimating optics configured to convey one or more images from the modulator to the mirror, the mirror configured to convey the images to the zoom optics, the zoom optics configured: to convey the image(s) from the mirror to a tissue sample; and convey one or more resulting images, formed by the image(s) illuminating the sample, back to the mirror, which conveys the resulting image(s) from the zoom optics to the image sensor, and, the processor configured to control the modulator to form the image(s), the image(s) including at least one pattern selected to interact with the sample to generate different depth information in each of resulting image(s).
Abstract:
A method of generating adjusted image data to compensate for modality-induced distortion includes, at a processor: receiving a three-dimensional image captured with a first imaging modality and including (i) distorted surface image data depicting a surface of an object and (ii) distorted volume image data depicting a 5 volume of the object; extracting the distorted surface image data from the three- dimensional image; receiving reference surface image data captured with a second imaging modality and depicting the surface of the object; determining a surface transformation for registering the distorted surface image data with the reference surface image data; determining a volume transformation informed by 10 the surface transformation; generating an adjusted three-dimensional image by applying the volume transformation to the three-dimensional image; and storing the adjusted three-dimensional image in the memory.
Abstract:
A medical navigation system is provided for performing at least part of an assessment of a non-living body. The medical navigation system comprises a positioning device having a positioning arm with an end effector at the end of the positioning arm, an imaging device coupled to the end effector, and a controller electrically coupled to the positioning device and the imaging device. The controller has a processor coupled to a memory and a display. The controller is configured to generate a signal to move the positioning arm to position the imaging device through a range of motion to perform a scan of a surface of the body and receive and save as data in the memory signals generated by the imaging device during the range of motion.
Abstract:
A method of data acquisition at a magnetic resonance imaging (MRI) system is provided. The system receives at least a portion of raw data for an image, and detects anomalies in the portion of raw data received. When anomalies are detected, the system can correct those anomalies dynamically, without waiting for a new scan to be ordered. The system can attempt to scan the offending portion of the raw data, either upon detection of the anomaly or at some point during the scan. The system can also correct anomalies using digital correction methods based on expected values. The anomalies can be detected based on variations from thresholds, masks and expected values all of which can be obtained using one of the ongoing scan, previously performed scans and apriori information relating to the type of scan being performed.
Abstract:
Optionally adjustable head coil system and methods for enhancing and/or optimizing magnetic resonance imaging, involving a housing, the housing having at least one portion, the at least one portion having a lower portion, an upper portion, and opposing side portions, each at least one portion optionally in movable relation to any other portion for facilitating adjustability, each at least one portion configured to accommodate at least one radio-frequency coil, and the upper and lower portions each optionally configured to overlap and engage the opposing side portions for facilitating decoupling the at least one radio-frequency coil, and a tongue portion optionally in movable relation to any other portion for facilitating adjustability, engageable with the lower portion, and fixably couple-able with a transporter.
Abstract:
A medical navigation system is provided for registering a patient for a medical procedure with the medical navigation system using fiducial markers. The fiducial markers are placed on the patient prior to a 3D scan and the fiducial markers each have a target for use with a tracking system. The medical navigation system comprises a 3D scanner, a tracking system, a display, and a controller electrically coupled to the 3D scanner, the tracking system, and the display. The controller has a processor coupled to a memory. The controller is configured to: receive 3D scan data generated by the 3D scanner representative of a 3D scan of at least a portion of the patient, the 3D scan including the fiducial markers visible by the 3D scanner; load from the memory saved medical image data, the saved medical data including preoperative image data saved during a previous scan of at least a portion of the patient; receive position data from the tracking system based on the target for each of the fiducial markers; and perform a transformation mapping to create a single unified virtual coordinate space based on the 3D scan data, the position data, and the medical image data, and updating registration data of the medical navigation system based on the transformation mapping.
Abstract:
A delta-relaxation magnetic resonance imaging (DREMR) system is provided. The system includes a main field magnet and field shifting coils. A main magnetic field with a strength B0 can be generated using the main filed magnet and the strength B0 of the main magnetic field can be varied through the use of the field-shifting coils. The DREMR system can be used to perform signal acquisition based on a pulse sequence for acquiring at least one of T2*-weighted signals imaging; MR spectroscopy signals; saturation imaging signals and MR signals for fingerprinting. The MR signal acquisition can be augmented by varying the strength B0 of the main magnetic field for at least a portion of the pulse sequence used to acquire the MR signal.
Abstract:
A method of imaging an implant device in a computing device is provided. The computing device includes a processor interconnected with a memory and a display. The method includes, at the processor: obtaining a first magnetic resonance (MR) image of a patient tissue, the first MR image containing a first magnetic field strength indicator; responsive to the implant device being inserted in the patient tissue, obtaining a second MR image of the patient tissue, the second MR image containing a second magnetic field strength indicator smaller than the first magnetic field strength indicator; registering the second MR image with the first MR image; generating a composite image from the first MR image and the second MR image; and presenting the composite image on the display.
Abstract:
A method of configuring a conducting grid of elements interconnected at intersecting nodes by switches is described. The method includes: constructing a background grid by connection of centroids of the cell shape of the conducting grid; identifying a subset of elements in the background grid that intersect the smooth pattern of loops; identifying a subset of elements in the conducting grid that intersect the subset of elements in the background grid; the subset of elements in the conducting grid forming a discretized pattern of loops representing the smooth pattern of loops; for each of the discretized pattern of loops identifying current-in and current-out nodes; altering the on-off state of individual switches in accordance with the discretized pattern of loops; opening the switch between each respective pair of current-in and current out nodes; and applying power to the conducting grid via at least one pair of the input and output current nodes such that the current flow through the elements generates the magnetic field profile.
Abstract:
A method of correcting warping of an acquired image in an MRI system, caused by non- linearities in gradient field profiles of gradient coils is set forth, comprising a) constructing a computer model representing conducting pathways for each gradient coil in said MRI system; b) calculating a predicted magnetic field at each point in space for each said gradient coil in said model; c) measuring actual magnetic field at each point in space for each said gradient coil in said MRI system; d) verifying accuracy of said model by comparing said predicted magnetic field to said actual magnetic field at each said point in space and in the event said model is not accurate then repeating a) – d), and in the event said model is accurate then; constructing a distortion map for mapping coordinates in real space to coordinates in warped space of said acquired image based on deviations of said predicted magnetic field from linearity; and unwarping said warping of the acquired image using said distortion map.