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Tuberculosis (TB) is an infectious disease caused by mycobacterium which can be diagnosed by analyzing medical test report of patient that take more than a month to get the result. The aim of this study is to propose a solution which can be used to identify TB's presence and start treating such suspected patients. In this paper, we propose a method to use city block measure for segmenting x-ray image...
X-rays with photon having wavelength below 0.2–0.1 nm are generally used to produce X-ray images due to their high penetration ability. But photon counting statistics follows Poisson noise distribution which degrades quality of medical data (X-ray) represented by photon images. This Poisson noise can be reduced by increasing the dose of X-ray for production of X-ray image but it will harm patient...
Metal parts in a target object sometimes cause metal artifacts and beam hardening effects in an x-ray tomographic image. In this paper, we proposed a new method to extract a region of metals by finding a change of an energy spectrum in the projection data measured with an energy discriminating photon counting detector. The change in the energy spectrum was calculated using two parameters; RAI (relative...
In the food industry, automatic inspection of key ingredients as well as end products is gaining attention. Automatic detection of unhealthy ingredients on early stage of food production is becoming a vital task. In this paper, feature extraction of raw food ingredient's x-ray images and their classification is presented. X-ray images of pine and pistachio nuts are used as samples for this purpose...
Exterior data in CT refer to the data acquired from detector bins on one side of the detector center. It corresponds to, in the image space, an annulus-shaped scanning FOV. Exterior scanning geometry is of practical interest to obtaining the tomographic information of the peripheral region, when the center of the object can and/or should be spared from X-ray irradiation. In this work, we investigated...
The quality of life of a country's citizens is much depended on its healthcare system. People have the right to know the status of their health. Healthcare providers need to know the medical histories of patients to offer better treatment. Therefore, demand for improvement in the access of healthcare information has been increased. This paper presents the design of an active distributed E-health system,...
A US law mandating non-intrusive imaging and radiation detection by 2012 for 100% of US-bound containers at international ports has provoked widespread concern that the resulting congestion would hinder trade significantly. To address this issue, we present as a viable alternative an advanced computational model to implement computer automation for dual-energy X-ray imaging technique to detect and...
Diffraction-enhanced imaging (DEI) is a synchrotron based imaging technique, which generates high spatial resolution and contrast of both calcified and soft tissues. This technique not only provides the visualization of absorption information like conventional X-ray imaging, but also refraction and scattering properties. Multiple image radiography (MIR) is an effective way to extract theses information...
This paper presents a novel self-calibration method of an X-ray scene applied for the 3-D reconstruction of the scoliotic spine. Current calibration techniques either use a cumbersome calibration apparatus or depend on manually identified landmarks to determine the geometric configuration, thus limiting routine clinical evaluation. The proposed approach uses high-level information automatically extracted...
Horizontal brightness projection is used to extract the welding region image, which is then processed by median Altering to get background intensity of each pixel. Based on the characteristics of the human brightness vision, an approximate subsection function of just noticeable difference (JND) is set up. According to the function, welding region image is enhanced adaptively. By the approach presented,...
It is well known that nanocrystals cannot be fingerprinted structurally from laboratory based powder X-ray diffraction patterns. Three novel strategies for the structurally identification of nanocrystals in a transmission electron microscope (TEM) are, therefore, presented. Either a single High-Resolution Transmission Electron Microscopy (HRTEM) image or a single Precession Electron Diffractogram...
Traumatic pelvic injuries are complex and difficult to treat, due to the high risk of complications. Prompt and accurate medical treatment is therefore vital. Computer-aided decision-making systems can assist physicians in this task, but none of those proposed so far incorporate features extracted from medical images. The study in this paper uses demographic information, standard medical measurements,...
X-ray images are the essential aiding means all along in clinical diagnosis of fracture. So the processing and analysis of X-ray fracture images is particularly important. Extracting the features of X-ray images is a very important process in classifying fracture images according to the principle of AO classification of fractures. A proposed algorithm is used in this paper. First, use marker-controlled...
Based on the research of the feature analysis on the X-ray films of chest and the rib, the author raised an algorithm, which realizes the automatic extraction of the rib frame by the physic regulations. This algorithm makes full use of the image processing method of filtering, edge detection, tracking seed, parabolic fitting, and some other related image processing technology, combined with the biological...
This paper discusses covert testing data and key human factors. First, different reasons why airport security screeners sometimes fail to detect threats when covert tests are conducted at airports are discussed. Key human factors are identified and analyzed with regard to covert test results. It is explained that pre-employment selection and training are indispensable prerequisites for good operational...
A modified version of Kaczmarz algorithm for improving image reconstruction from projections in computerized tomography is proposed. Instead of taking projection onto hyperplanes sequentially in the given order in each iteration by classical Kaczmarz algorithm, the proposed algorithm does projection in an adaptive order which is evaluated from pseudo measurement error of each hyperplane. Since this...
Single photon emission computed tomography (SPECT) could achieve the functional image of the organ of interest, so the diseases can be found much earlier. Cone-beam SPECT reconstruction can improve the photo density and spatial resolution of the reconstructed image. A simple method for cone beam reconstruction is to rebin the cone-beam projection data into 2D sinograms and use 2D reconstruction method...
The recognition of wood defects is very significant for reasonable selection and scientific utilization of wood. X-ray was adopted as a measure method for wood nondestructive testing. The difference of X-ray intensity after exposure is tested in order to judge whether the wood defects exist or not. Then the defects images were processed effectively. A group of describing shape features parameters...
Threat Image Projection (TIP) is a software system that is used at airports to project images of threat items amongst the passenger baggage being screened by X-ray. The use of TIP is becoming more widespread and is increasingly being included as part of security regulation. This is due to its purported benefits of improved attention and vigilance, and increased exposure to threat items that are linked...
Nowadays, medical diagnostics using images has a considerable importance in many areas of medicine. It promotes and makes easier the acquisition, transmission and analysis of medical images. The use of digital images for diseases evaluations or diagnostics is still growing up and new application modalities are always appearing. This paper presents a methodology for a semi-automatic segmentation of...
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