62 results about "Multiplanar reconstruction" patented technology

A method and system for visualizing the spine in 3D medical images is disclosed. A spinal cord centerline is automatically determined in a 3D medical image volume, such as a CT volume. A reformatted image volume is then generated based on the spinal cord centerline. The reformatted image volume can be a straightened spine volume or a Multi-planar Reconstruction (MPR) based volume that follows the natural curve of the spine. The reconstructed volume can be displayed as 2D slices or 3D volume renderings.

A medical tomography apparatus and method, a 3D dataset is generated in as picture elements arranged in a three-dimensional grid during the examination of a patient. Predefined surfaces are stored in a library and, dependent on the desired examination, one of the predefined surfaces can be selected with an input unit and thus the shape of an evaluation surface can be defined. Picture elements of the 3D dataset along the evaluation surface and used for constructing a two-dimensional image. A pre-defined surface is selected from the library and is employed for determining the shape of the evaluation surface. The method and the apparatus can be particularly employed in a simple way for the multi-planar reconstruction of a two-dimensional image along a multiply or arbitrarily curved surface.

The invention relates to a method for three-dimensional registration and brain tissue extraction of individual human brain multimodality medical images. The method comprises the following steps: reading DICOM medical image data, and converting DICOM format data into NIfTI format data; layering images adopting a nuclear magnetic resonance structure; establishing a mixture gaussian model through an east Asia brain structure template and an east Asia brain tissue probability graph of ICBM, and dividing nuclear magnetic data into a grey matter part, a white matter part and a cerebrospinal fluid part; enabling the registration methods of other modality data and nuclear magnetic structure images to be the same; according to a layering and registration result, removing a skull and other parts outside the skull of each modality, and reserving the structure of parts inside the skull; adding weighting of three tissue probability graphs of the grey matter, the white matter and the cerebrospinal fluid obtained through layering of structure images so as to obtain a brain tissue probability graph, and performing Gaussian kernel smoothness; setting a threshold, applying the threshold to each modality image data after registration and resampling, and removing the cranium and parts outside the cranium; outputting a save result in an NIfTI format. According to the method disclosed by the invention, the registration of various structure images and multiplanar reconstruction images of a tested person can be completed at the same time.

A method of controlling a surgical intervention to a bone (31) comprises: obtaining a three-dimensional image or multiplanar reconstruction of the bone (31), defining a position and an axis of intervention on the three-dimensional image or multi-planar reconstruction of the bone (31), and controlling the orientation of an intervention instrument (1) equipped with an orientation sensor (2) during the surgical intervention by evaluating a signal provided by the orientation sensor (2). The method further comprises referencing the intervention instrument (1) with respect to the bone (31) before the surgical intervention by arranging the intervention instrument (1) along an anatomic landmark (32) being an edge of the bone (31) and rotating the orientation sensor (2) into a predefined position, or by arranging the intervention instrument (1) essentially perpendicular to an anatomic landmark (32) being an essentially flat surface of the bone (31) and rotating the orientation sensor (2) into a predefined position. The method according to the invention allows for efficiently achieving correct orientation and position of the intervention instrument in a bone surgical intervention. Furthermore, the method according to the invention provides an efficient real-time control at comparably low efforts. Still further, with the method according to the invention radiation exposure to the operational staff as well as patients can be reduced.

A system and method for performing a virtual endoscopy is provided. The method comprises the steps of: calculating a distance map using three-dimensional (3D) data of a lumen; calculating a multiplanar reconstruction (MPR) of the lumen, wherein the MPR is calculated orthogonal to the lumen at an endoscope position; performing a first region growing on the MPR of the lumen at the endoscope position, wherein data associated with the first region is marked; calculating a minimum distance and a maximum distance from the marked data of the first region growing using corresponding distances from the distance map; performing a second region growing on the MPR of the lumen for data outside the first region growing, wherein data associated with the second region is marked; and performing a 3D rendering of the marked data associated with the first region growing and the second region growing.

The invention discloses a multi-planar reconstruction imaging method for medical images, comprising the following steps: (a) scanning an inspection area of a target to be imaged, and acquiring the three-dimensional image sequence of the inspection area, wherein the three-dimensional image sequence is composed of a group of two-dimensional image sequences; (b) selecting an effective area image sequence from the two-dimensional image sequences, and determining the three-dimensional center of the effective area image sequence; and (c) taking the three-dimensional center of the effective area image sequence as a reconstruction center to perform multi-planar reconstruction imaging on the inspection area. According to the multi-planar reconstruction imaging method for medical images provided by the invention, the three-dimensional image sequence of the inspection area is screened to select the effective area image sequence and abandon noise area images, and then, the three-dimensional center of the effective area image sequence is determined and taken as the reconstruction center of multi-planar reconstruction imaging, thus improving the accuracy of positioning and reconstruction imaging.

The invention discloses a method for obtaining a high-resolution area-of-interest image through secondary scanning on the basis of visualization. The method comprises the following steps that the positions of a turntable and a radiation source are regulated, the distance is zoomed out, the wider visual field is shown, and an object is subjected to whole primary scanning; the three-dimensional visual reconstruction and the MPR (multiple planar reconstruction) are carried out according to a scanning result; reconstruction results are combined to be displayed, and the area-of-interest position is determined through interaction in the three-dimensional space; meanwhile, the positions of the turntable and the radiation source, the height of the turntable, the position of the object on the turntable and the resolution of imaging equipment are regulated, so that the center of interest is positioned in the center of the turntable, meanwhile, the visual field can just accommodate the area of interest, and the area-of-interest fine scanning is carried out after the regulation. The reconstruction is carried out according to the fine scanning result, and a high- resolution image of the area of interest is obtained. The method has the advantages that the positioning scanning of the area of interest can be realized, meanwhile, the resolution of the region scanning can be obviously improved, simplicity is realized, and the realization is easy.

The invention relates to a tomosynthesis method by illuminating an object by means of an X-ray source (1) with a linear trajectory (2), the method comprising a breakdown step into n planes (P) fanning out between the linear trajectory (2) and a detector plane (4) parallel to the linear trajectory. The method comprises an anisotropic regularization step over at least one plane (P). The invention is applied to medical imaging, to the field of non-destructive object testing, and more generally to any field applying reconstruction of objects moving past an X-ray source.

A method and a CT unit are proposed for producing CT images of an examination object having a periodically moving subregion, preferably a beating heart, by multi-planar reconstruction. Subsequent to joining the axial images with pixels from a number of partial volumes calculated for the rest phases, a reduction takes place to reduce artifacts occurring in overlap regions. This is done by carrying out threshold value formation in the zone of the boundary regions of the partial volumes with result image D_z. A pixel-oriented median filtering then occurs, resulting in image M_z. A differential value image is then produced using F_z=D_z−M_z. Subsequently, two-dimensional lowpass filtering is applied to F_z to produce a result image G_z. Finally, a calculation of B_z−G_z is used to form the final image E_z.

The invention discloses a customized porous tantalum implant and a preparation method thereof. The preparation method comprises the following steps: firstly, adopting CT or MRI scanning to obtain a multiplanar reconstruction image of a natural bone, designing the appearance of a customized implant, shelling the customized implant, and designing net racks in a shell; manufacturing prototypes of the thin shell and the net racks by a rapid prototyping machine; uniformly mixing tantalum powder and pellets capable of burning loss to obtain a mixture, adding the mixture in a dispersant to prepare mixed slurry of the powder and the pellets, filling a prototype stent with the mixed slurry, performing vacuum drying to obtain a green body, carrying out low-temperature sintering and skimming in protecting gas at the temperature of 1,000-1,200 DEG C to obtain low-strength porous tantalum body, and performing low-temperature sintering and skimming in the protecting gas at the temperature of 1,800-2,500 DEG C to obtain the final customized porous tantalum implant. The net racks and the pellets can form communicated main pipelines and communicated spherical holes, and the main pipelines can prevent passages from blockage, so that nutriment conveying is facilitated, the spherical holes are beneficial to bone cell adhesion and growth, and the elasticity modulus of the implant is equivalent to that of that of the human bone.

The invention relates to a region of interest display method and device, equipment and a storage medium. The method comprises the following steps: segmenting a region of interest in an acquired original medical image to obtain a target segmented image, wherein the target segmentation image comprises a region of interest; selecting a plane from the original medical image as an initial multi-plane reconstruction MPR plane, and determining a target MPR plane based on the initial MPR plane and the original medical image; determining a segmentation MPR plane corresponding to the target MPR plane inthe target segmentation image according to the target segmentation image and the initial MPR plane, and determining a bounding box where the region of interest is located on the segmentation MPR plane, wherein the coordinate position of each pixel point on the segmentation MPR plane is the same as that of each pixel point on the target MPR plane; and displaying the bounding box on the target MPRplane in an overlapping manner, wherein the bounding box surrounds the region of interest. The region of interest displayed by the method is more accurate, and the operation speed is high so that theregion of interest can be displayed in real time.

The invention provides a heart model building method, which comprises the following steps: providing a heart tomographic image, obtaining the point information of the heart tomographic image, and establishing a heart model corresponding to the heart tomographic image on the basis of the point information. The invention also provides a heart model registration method and a heart multi-plane reconstruction method. A heart model base is established to carry out registration on one heart model and a point set obtained by the calculation of an input heart image; then, according to a transformation relationship obtained by the registration, a key point position corresponding to the heart in the input image is obtained through mapping the key point position of the heart model; and according to the obtained key point position, calculating the directions of a long axis and a short axis. The new frame and method provided by the invention can quickly and effectively realize the multi-plane automatic reconstruction of the heart tomographic image.

The invention relates to a method for carrying out three-dimensional reconstruction on an intestinal canal by using VTK (Visualization Tool Kit). In the method, the three-dimensional reconstruction is directly carried out on the basis of VTK. The method comprises the following steps of: first, carrying out filtering and volume data segmentation on original human body CT scanning data including noise so as to obtain CT data of an intestinal canal tissue; interpolating the data in order to obtain a better reconstruction effect; interpolating the volume data by using a morphological method; and then designing an algorithm for high efficiently solving multiplanar reconstruction ambiguity according to MarchingCubes multiplanar reconstruction theory. During multiplanar reconstruction, color, scattered light and scattered light intensity are well set according to the characteristics of the intestinal canal. It is shown by experiment results that a three-dimensional intestinal canal can be realistically reconstructed at a higher reconstruction speed by using the three-dimensional intestinal canal reconstruction algorithm provided by the invention.

An image processing system of the present invention is an image processing system using volume data, and includes a recording unit that records a plurality of volume data indicating a subject which has a tubular structure; a tubular structure association unit that associates the tubular structures included in the respective plurality of volume data with each other; an attention point designation unit that designates an attention point on the tubular structure with respect to at least one of the plurality of volume data; a corresponding point creation unit that creates a corresponding point corresponding to the attention point in accordance with the association, with respect to each of the tubular structures included in the respective plurality of volume data; a multi planar reconstruction image generation unit that generates a plurality of multi planar reconstruction images including the attention point or the corresponding point from the plurality of volume data; and a display unit that consecutively displays the plurality of multi planar reconstruction images in a state where the attention point or the corresponding point is displayed.

The invention discloses an image processing method and device based on a CT transverse image. The method a step of acquiring a plurality of CT transverse images, a step of generating a multi-planar reconstructed image based on the CT transverse images, a step of extracting a rib centerline from the multi-planar reconstructed image according to a rib contour, a step of forming a rib sleeve based onthe rib centerline, a step of straightening the rib sleeve and calculating pixels in the sleeve, and a step of carrying out the planarization display of a rib image in accordance with the calculatedpixels in the sleeve. According to the method, the rapid and effective diagnosis of a rib fracture is achieved, the repeated working intensity of a diagnosing doctor is reduced, the diagnosis time isreduced, the diagnostic accuracy is improved, and the method has high practicability and necessity in practical work.

A system and method include a shape sensing enabled device (102) having an optical fiber (126). An interpretation module (115) is configured to receive optical signals from the optical fiber within a structure and interpret the optical signals to determine a shape of the device. An image generation module (140) is configured to receive the shape of the device, register the shape with an image volume of the structure and generate a curved multi-planar reconstruction (CMPR) rendering based on the shape.

The invention discloses an image fusion method, device and apparatus and a storage medium. The method comprises the following steps: acquiring volume data obtained by scanning a scanned object by a medical device; determining the position information of the reconstruction plane; during the volume rendering process of the volume data, based on the ray casting algorithm, reconstructing the multi-plane reconstruction image at the position where the reconstruction plane is located to obtain a volume rendering/multi-plane reconstruction fusion image. The purpose of this study is to provide a new image post-processing technology, which can make doctors to view the position and shape of the lesion and diagnose the disease only through the image drawn by this image post-processing technology.

The invention relates to a method of vascular straightening surface reconstruction based on CT image multiplanar reconstruction. The method for reconstruction includes setting a control point, performing spline interpolation, performing spatial translation transformation, generating a sample surface, and performing data sampling and image generation. Based on the multiplanar reconstruction of CT or MRI volume data set, through spline interpolation, spatial translation transformation, sampling surface and data sampling, the images of blood vessels in three-dimensional space can be displayed ina two-dimensional plane with equal spacing and straight line, which is convenient to quantify and compare the stenosis of blood vessels. The method has important clinical significance, and considerable social and economic benefits can be obtained. It is helpful to observe the difference of vessel diameters and has important practical value in the CT diagnosis of coronary artery stenosis and otherdiseases.

The invention discloses a stereoscopic structure network three-dimensional image reconstruction-oriented layer data obtaining method. The method comprises the following steps of performing preprocessing of image enhancement and the like on a collected monocular layer image sequence S; calculating a pixel correlation coefficient and a fuzzy coefficient on each layer image to obtain a correlation coefficient image sequence SR and a fuzzy coefficient image sequence SF; designing a low-pass filter for performing filtration processing on SR and SF to obtain a judgment image sequence BD; and calculating out a clear element image sequence SE by utilizing S and BD. Falsely detected pixels due to inter-layer shielding and depth-of-field region crossing are judged and SE is marked. The marked clearelement image sequence SE, namely, obtained stereoscopic structure network three-dimensional image reconstruction-oriented layer data is output. The problem of high-quality layer data acquisition during multi-plane reconstruction of a network with a stereoscopic structure is solved; and the precision of subsequently reconstructed three-dimensional images and network structure parameter measurementbased on the reconstructed three-dimensional images is improved.