117 results about "X ray data" patented technology

A knowledge based diagnostic imaging system, comprising diagnostic equipment for analyzing a patient to obtain a new patient data set containing at least one of MR data, CT data, ultrasound data, x-ray data, SPECT data and PET data. The diagnostic equipment automatically analyzes the new patient data set with respect to a physiologic parameter of the patient to obtain a patient value for said physiologic parameter. A database containing past patient data sets for previously analyzed patients. The past patient data sets contain data indicative of the physiologic parameter with respect to previously analyzed patients. A network interconnects the diagnostic equipment and the database to support access to the past patient data sets.

The present invention provides an X-ray CT apparatus capable of improving image quality of a dual energy image. The X-ray CT apparatus comprises an X-ray tube for applying X rays having a first energy spectrum and X rays having a second energy spectrum different from the first energy spectrum to a subject, an X-ray data acquisition unit for acquiring X-ray projection data of the first energy spectrum projected onto the subject and X-ray projection data of the second energy spectrum projected thereonto, dual energy image reconstructing unit for image-reconstructing tomographic images indicative of X-ray tube voltage-dependent information at X-ray absorption coefficients related to a distribution of atoms, based on the X-ray projection data of the first energy spectrum and the X-ray projection data of the second energy spectrum, and adjusting unit for adjusting conditions for the image reconstruction in order to optimize the tomographic images indicative of the X-ray tube voltage-dependent information.

In order to maintain the surface area of an alumina catalyst over the course of operation and regeneration, a method of incorporating phosphorus into the alumina has been developed. By incorporating a small amount of phosphorus, the resulting catalyst is better able to withstand hydrothermal conditions, such as during a carbon burn step, which causes alumina surface area to degrade or decrease. Reduced surface area also desorbs chloride from the catalyst, lowering activity and increasing corrosion. Here, steam treatments have been used to simulate commercial hydrothermal stability and a critically small amount of phosphorus has been discovered which balances an increased surface area against decreased chloride retention. Increased surface area results from increased phosphorus, yet higher levels of phosphorus blocks ability to hold chloride. Moreover, X-ray data shows that an amount as low as 0.2 wt-% phosphorus increases alumina transition temperature, while pilot plant data shows excellent naphtha reforming yields.

A computer implemented method, apparatus, and computer usable program code for generating a three-dimensional model of an object of interest in an aircraft. In response to transmitting a plurality of x-rays from a set of transmission points into the aircraft, backscatter x-ray data is received. The object identified from a two-dimensional diagram of the backscatter data. Points for the object are created from the identification of the object in the received data. The points are placed at a first distance from the transmission points to form a first curve. The points are placed at a second distance from the transmission points to form a second curve. A first surface is formed from the first and second curves. A second surface is formed that intersects the first surface to form an intersection. Three-dimensional data is generated for the three-dimensional model of the object from the intersection.

The present disclosure relates to the generation of dual-energy X-ray data using a data sampling rate comparable to the rate utilized for single-energy imaging. In accordance with the present technique a reduced kVp switching rate is employed compared to conventional dual-energy imaging. Full angular resolution is achieved in the generated images.

A process of data calibration and correction is disclosed that utilizes feedback from a temperature sensor of an x-ray detector to isolate or otherwise select an appropriate calibration or correction map that is specific to the temperature of the x-ray detector during data acquisition. The method is also designed to take into account changes in power transients of an x-ray detector between the acquisition of imaging data and the acquisition of offset data. The method is particularly applicable in optimally selecting and applying gain correction, conversion factor, bad pixel, and offset calibrations.

CT imaging is enhanced by adaptively filtering x-ray attenuation data prior to image reconstruction. Detected x-ray projection data are adaptively and anisotropically filtered based on the locally estimated orientation of structures within the projection data from an object being imaged at a plurality of rotation positions. The detected x-ray data are uniformly low pass filtered to preserve the local mean values in the data, while the high pass filtering is controlled based on the estimated orientations. The resulting filtered data provide projection data with smoothing along the structures while maintaining sharpness along edges. Image noise and noise induced streak artifacts are reduced without increased blurring along edges in the reconstructed images. The enhanced image allows reduced x-ray dose while maintaining image quality.

Systems and methods of switching between data acquisition modes in an x-ray system are disclosed. The x-ray system includes a control device and a detector device, the detector device including one or more x-ray sensors. During changes in acquisition modes, responsibility for flushing the one or more x-ray sensors may be transferred from the control device to the detector device. When the detector device is ready to begin acquiring data in a new data acquisition mode, the responsibility is transferred back from the detector device to the control device.

The present invention relates to the field of X-ray on-line scatheless detection device and a rapid X-ray heavy intensity conveyor belt detection system, which comprises X-ray generator, one or more high speed X-ray detector and PC computer with X-ray detection system software, wherein, each high speed X-ray detector is connected with PC computer by Ethernet interface; each high speed X-ray detector comprises one or more group photoelectric conversion module, one or more X-ray data collecting module, X-ray data processing and transmitting module, modules in each group of X-ray photoelectric conversion module are connected serially, each X-ray photoelectric conversion module group are connected with X-ray data collecting module in parallel mode, each X-ray data collecting module connected with X-ray data processing and transmitting module in parallel mode. According to the present invention, image of heavy intensity conveyor belt can be detected in long-distance in real time, including rapid scan, transfer and inspection of heavy intensity conveyor belt, and the present invention has the merits of high integration, high reliability and high processing speed. The detection level is also improved.

Apparatus for producing attenuation corrected nuclear medicine images of patients, comprising: at least one gamma camera head that acquires nuclear image data suitable to produce a nuclear tomographic image at a first controllable rotation rate about an axis; at least one X-ray CT imager that acquires X-ray data suitable to produce an attenuation image for correction of the nuclear tomographic image at a second controllable rotation rate about the axis; and a controller that controls the data acquisition and first and second rotation rates to selectively provide at least one of the following modes of operation: (i) a movement gated NM imaging mode in which the second rotation rate is substantially higher than the first rotation rate and the data from each view of the X-ray acquisition is associated with one of a plurality of respiration gated time periods; (ii) a cardiac gated NM imaging mode in which the second rotation rate is substantially higher than the first rotation rate and the data from each view of the X-ray acquisition for different rotations is averaged, wherein the X-ray data is not correlated with the cardiac cycle; and (iii) a cardiac gated NM imaging mode in which the second rotation rate is higher than the first rotation rate and the X-ray data is binned in accordance with a same binning as the NM data.

The invention discloses a cancer diagnosis system and method based on breast molybdenum target calcification characteristics. The method comprises a first step of acquiring a breast molybdenum targetx-ray data set; a second step of carrying out image enhancement processing on each image in the breast molybdenum target x-ray data set respectively, and carrying out binaryzation segmentation to obtain a calcified lesion area; a third step of carrying out feature extraction on the calcified lesion area subjected to image enhancement processing and binaryzation respectively to obtain traditional features and depth features; a fourth step of performing typical correlation analysis on the traditional features and depth features, deleting the depth features with the low association weight with the traditional features, and saving the depth features which are closely related to the traditional features; a fifth steps of carrying out support vector machine linear classification model training for the saved depth features to obtain a classifier. According to the method, over-fitting of a traditional convolutional neural network on the calcification diagnosis of the breast molybdenum targetscan be effectively avoided, and automatic diagnosis of the molybdenum target image lesion at any resolution is realized.

The invention discloses a chest X-ray film denoising method based on a deep convolutional neural network. The method comprises the steps of collecting chest X-ray film data, performing data format conversion, performing preprocessing to obtain an original image block for training, adding Gaussian noise to generate a noisy image block, and taking the paired original image block and noisy image block as a training data set; Constructing a convolutional neural network model for removing chest X-ray film noise, wherein the convolutional neural network model comprises a deep convolutional neural network and a residual error network; Taking the paired original image blocks and noisy image blocks as input, and performing training to obtain a trained convolutional neural network model X-ReCNN; taking the chest X-ray data of the noise to be removed as an input characteristic map of X-ReCNN, removing noise, and outputting the predicted denoised chest X-ray film.. According to the method, the noise in the chest X-ray film can be removed with light weight, high speed and high precision, the parameters of a network structure are greatly reduced, and the network training time is shortened.

A method and apparatus for quantitative analysis of a material in which an electron beam is caused to impinge upon the material are described. The method comprises detecting low loss electrons (LLEs) received from a first region of the material due to interaction with the electron beam and generating corresponding LLE data. The method further comprises detecting x-rays received from a second region of the material due to interaction with the electron beam and generating corresponding x-ray data, wherein the first and second regions overlap, and analysing the LLE data together with the x-ray data so as to generate compositional data representative of the composition of the first region.

An article sensing and tracking system and computer system integrated and connected to present on a monitor screen, or screens, visual x-ray and photographic images of articles that are being passed through a scanner and visual indication of the physical location of the displayed articles within the system, enabling security personnel viewing a monitor screen to accurately track and maintain custody of the articles, until cleared, through examination of x-ray data and other information relating to the articles.