53 results about "Reconstruction procedure" patented technology

The invention relates to a system and methods for retracting soft tissue during spinal repair or reconstruction procedures, particularly procedures within intervertebral sites of degenerated discs and associated neural compression. A retractor system includes an implantable bone plate, two or more retractor blades, the bone plate and retractor blades being mutually engageable; and a mechanism to adjust the retractor blade relative to the bone plate. In some embodiments, the retractor system may be applied to span more than one intervertebral space. An implanted retractor system provides an aperture for a clear operating field, and protects collateral tissue. A method for retracting soft tissue to facilitate spinal surgery includes securing a bone plate to adjacent vertebral bodies, engaging one or more retractor blades to the bone plate; and adjusting the angular position of the retractor blade relative to the bone plate so as to retract tissue lying external to the bone plate.

Methods and systems for measuring mechanical property of a vascular wall and a method and system for determining health of a vascular structure are provided wherein local deformation of a vessel wall resulting from physiologic pressures with altered transmural forces is measured. A non-invasive free-hand ultrasound scanning-procedure was performed to apply external force, comparable to the force generated in measuring a subject's blood pressure, to achieve higher strains by equalizing the internal arterial baseline pressure. When the applied pressure matched the internal baseline diastolic pressure, strain and strain rate increased by a factor of 10 over a cardiac cycle. Radial arterial strain was assessed in the vessel wall over the entire deformation procedure using a phase-sensitive, two-dimensional speckle-tracking algorithm. An elastic modulus reconstruction procedure was developed to estimate the non-linear elastic properties of the vascular wall.

Disclosed is an effective algorithm to correct motion-induced phase error using an iterative reconstruction. Using a conjugate-gradient (CG) algorithm, the phase error is treated as an image encoding function. Given the complex perturbation terms, diffusion-weighted images can be reconstructed using an augmented sensitivity map. The mathematical formulation and image reconstruction procedures are similar to the SENSE reconstruction. By defining a dynamic composition sensitivity, the CG phase correction method can be conveniently incorporated with SENSE reconstruction for the application of multi-shot SENSE DWI. Effective phase correction and multi-shot SENSE DWI (R=1 to 3) are demonstrated on both simulated and in vivo data acquired with PROPELLER and SNAILS.

A synthetic aperture radar image is generated by directing randomly a beam of transmitted pulses at an area using a steerable array of antennas, wherein the area is uniformly by the transmitted pulses while the array of antennas moves along a path. A sparse reconstruction procedure is applied to received signals from the area due to reflecting the transmitted pulses to generate the image corresponding to the area. The radar system can operate in either sliding spotlight mode, or scan mode. The area can be of an arbitrary shape, and a resolution of the image can be increased.

The invention relates to a disk array data reconstruction method which pertains to a computer data storage method and solves the problem that the existing disk array data reconstruction method takes too much time and affects the reading and writing performances and reliability of a storage system. A disk array of the invention is provided with a main control module, reading and writing processing modules and a reconstruction module and comprises the steps of initialization, diary pot diagram update, reconstruction based on diaries and finishing. The method instructs data reconstruction process by the real-time monitoring of disk space using status of the disk array; when space that is not accessed is reconstructed, the only requirement is to write 0 in all corresponding data blocks newly added into a disk, thus greatly reducing physical disk visiting time brought by reconstruction, increasing reconstruction speed and reducing the response time of user access; the reconstruction method does not change the reconstruction procedure or the distribution manner of disk array data, can conveniently optimize various traditional disk array data reconstruction methods and is applicable to the construction of storage systems with high performance, high usability and high reliability.

An optimized elastic modulus reconstruction procedure can estimate the nonlinear elastic properties of vascular wall from intramural strain and pulse wave velocity (PWV) measurements. A noninvasive free-hand ultrasound scanning procedure is used to apply external force, comparable to the force in measuring a subject's blood pressure, to achieve higher strains by equalizing the internal arterial baseline pressure. PWV is estimated at the same location where intramural strain is measured. The reconstructed elastic modulus is optimized and the arterial elastic modulus can be determined and monitored using a simple dual elastic modulus reconstruction procedure.

A spotlight synthetic aperture radar (SAR) image is generated by directing randomly a beam of transmitted pulses at a set of two or more areas using a steerable array of antennas. Each area is illuminated by an approximately equal number of the transmitted pulses. Then, a reconstruction procedure is applied independently to received signals from each area due to reflecting the transmitted pulses to generate the image corresponding to the set of areas.

The invention discloses a method for reconstructing vertical profiles of airborne multi-scan meteorological radar targets. The vertical profiles of the meteorological targets at the fronts of aircrafts can be displayed by the aid of meteorological echo information acquired by airborne multi-scan meteorological radar, and altitude-dimension intensity change and distribution ranges of reflectivity factors of meteorological target radar can be quickly, accurately and comprehensively reflected. Besides, at least eight layers of meteorological target information are acquired by the aid of the airborne meteorological radar in multi-scan work modes, and metrological target reflectivity factor change rule statistical models are innovatively built by means of statistics by the aid of metrology in information reconstruction procedures; the vertical profiles of the meteorological targets right ahead routes of the carrier aircrafts can be truly and completely represented by the aid of the multi-scan echo information. The method has the advantages of simplicity and convenience in operation. In addition, the quantities of processed data are low as compared with the traditional method, and the method has low requirements on systems and is high in reconstruction precision.

Devices for carrying out subperiosteal minimally invasive jaw bone augmentation and reconstruction procedures, to develop a passageway and surgical site in a concealed area of patient tissue, where the surgical site is not exposed. The devices have shanks with specially configured tips to facilitate maneuvering the device through mammalian tissue to develop a tunnel in the tissue and a remote surgical site within the tissue. The device tips have one or more peripheral cutting surfaces that direct the positioning of the tunnel formation when the instrument handle is manipulated, e.g., by rotation, angular, forward or rearward motion. Embodiments of the devices are configured with tips that have a wide spread for cutting and elevating tissue, and with tips that may be maneuvered to condense bone graft material being implanted at a surgical site concealed within the tissue.

In a device and associated method for reconstruction and visualization of projection data, projection data are stored per slice and are subjected to an image reconstruction procedure in parallel within arbitrary slice planes in a processor-controlled filtering process that is executed n times, wherein volume data that are created can already be made available (loaded) for a direct visualization.

Disclosed area high-order generalized series parallel imaging method for acquiring high spatio-temporal resolution functional magnetic resonance images and a sampling method. The higher-order generalized series parallel imaging method for acquiring high spatio-temporal resolution functional magnetic resonance images includes: performing sampling of an input image in k-space; applying a high-order generalized series (HGS) reconstruction procedure to data acquired as the sampling result to acquire a first reconstructed image; and applying a parallel magnetic resonance reconstruction procedure to the first reconstructed image to acquire a second reconstructed image.

A method of accumulating an image of a specimen using a scanning-type microscope, comprising the following steps: poviding a beam of radiation that is directed from a source through an illuminator so as to irradiate the specimen; poviding a detector for detecting a flux of radiation emanating from the specimen in response to said irradiation; causing said beam to undergo scanning motion relative to a surface of the specimen, and recording an output of the detector as a function of scan position, which method additionally comprises the following steps: in a first sampling session S1 , gathering detector data from a first collection P1 of sampling points distributed sparsely across the specimen; repeating this procedure so as to accumulate a set {Pn} of such collections, gathered during an associated set {Sn} of sampling sessions, each set with a cardinality N>1; assembling an image of the specimen by using the set {Pn} as input to an integrative mathematical reconstruction procedure, wherein, as part of said assembly process, a mathematical registration correction is made to compensate for drift mismatches between different members of the set {Pn}.

A method and system is disclosed for precoding in a two transmit antenna MIMO system, for example, a wireless backhaul network. The method only uses the first column of the 2×2 precoder as the feedback information. When the feedback information is available to the transmitter, the transmitter performs an interpolation and reconstruction procedure to obtain the precoder matrix for each subcarrier. The method offers no significant loss in performance, with reduced computational complexity and feedback overhead compared to conventional known matrix representation methods.