aliasing artifacts and noise in ct images

... Electronics and Telecommunication Engineering, Shri Guru Gobind Singhji Institute of Engineering and Technology, Nanded, Maharashtra, India bDepartment of Electronics and Telecommunication Engineering, ... CT images are obtained by utilizing an injection protocol that enhances the liver in the CT images for medical interpretation However, the injection phase decides the enhancement variation, and ... explore intra-slice and inter-slice features by introducing a hybrid feature fusion layer using 2D and 3D DenseUNet The 2D DenseUNet extract the intra-slice features, and 3D Dense-UNet extract the inter-slice

Ngày tải lên: 10/03/2021, 15:55

... have been carried out to find the associations between MLS and injury outcomes such as disability or mortality In brain CT images, the brain midline is a line connecting the centers of the attachment ... imaginary line dividing the brain into two equal hemispheres Ideally, the midline should be a straight line, called ideal midline (IML) Severe brain trauma will cause swelling inside the brain, ... shift detection in CT images This is mainly due to the following difficulties Firstly, the midline is not a real anatomical feature, but an imaginary centerline dividing the brain into equal

Ngày tải lên: 11/09/2015, 14:36

... statistical modeling Four chart models including separated bar model, contiguous bar model, single- line-series line model and multiple- line-series line model are constructed and trained using a segmental ... RECOGNITION AND INTERPRETATION IN DOCUMENT IMAGES ZHOU YANPING NATIONAL UNIVERSITY OF SINGAPORE 2003 Trang 2CHART RECOGNITION AND INTERPRETATION IN DOCUMENT IMAGES ZHOU YANPING (Ph.D Candidate, ... little research work and practical products reported on recognizing and interpreting scientific chart images in comparing with those on the table or form recognition In the next section, we discuss

Ngày tải lên: 12/09/2015, 10:15

... Thus,examples of object detection in images are, for instance, detection of human faces, handgestures, cars, and road signs in traffic scenes, or just ellipses in images On the other hand, ifwe were ... of their skin so as to be as indistinguishable from the background as possible to gain protection from predators Object Detection and Recognition in Digital Images: Theory and Practice, First ... dimensionalityreduction selecting only pixels-of-interest based on a model of a color for human skin based on fuzzyrules Trang 7352 Object Detection and Recognition in Digital Imagesso on Thus, in the system in

Ngày tải lên: 12/02/2020, 19:36

... sweepinclud-ing and wavelet transform [18] An interactive lobe segmentation algorithm has been proposed by Ross et al., in which a handful of points are given by the user, and then thin plate splines ... σR and R represent the total number of scan lines in a fissure region, the standard deviation of length of scan lines, and the average length of scan lines in a fissure region respectively In ... point For each point in PFPsub, a normal vector can be calculated for the plane spanned by two arbitrary points in the cube and its center point From the set of all possible normal vectors in

Ngày tải lên: 02/11/2022, 08:52

... algorithms in time-critical applications [5] In turn, the wealth of spectral information available in hyperspectral imaging data opens ground-breaking perspectives in many applications, including target ... Reed and Yu for anomaly detection [18] The ATDCA algorithm finds a set of spectrally distinct target pixels vectors using the concept of orthogonal subspace projection (OSP) [19] in the spectral ... vectors xi and xj, defined byxi−xj2, (iii) the Infinity-Norm between two pixel vectors xi and xj, defined byxi−xj ∞, (iv) the spectral angle distance (SAD) between two pixel vectors xiand

Ngày tải lên: 21/06/2014, 18:20

... A Nonlinear Decision-Based Algorithm for Removal of Strip Lines, Drop Lines, Blotches, Band Missing and Impulses in Images and Videos S Manikandan and D Ebenezer Digital Signal Processing Laboratory, ... and reproduction in any medium, provided the original work is properly cited 1 INTRODUCTION It is well known that linear filters are not quite effective in the presence of non-Gaussian noise In ... remove impulse noise and preserve edges There are a wide variety of median filters in the literature In remote sensing, artifacts such as strip lines, drop lines, blotches, band missing occur along

Ngày tải lên: 22/06/2014, 00:20

... and ED The impact of contouring uncertainty could be reduced by“a posteriori” contouring from a single observer or by introducing Magnetic Resonance Imaging (MRI) in the planning procedures and/or ... uncertainty in delineating PB and other erectile structures, especially with computed tomography (CT), owing to the recognised limits of this imaging technique, mainly the low contrast in the ... prospectively assess the predictive parameters of genito-urinary toxicity and ED, including the possible correlation between ED and PB dose-volume parameters In this type of study, involving many Institutes

Ngày tải lên: 09/08/2014, 09:21

... 9Chỉ định CT bệnh ganU gan nguyên phát  Ung thư biểu mô tế bào gan nguyên phát  Intrahepatic bile duct carcinoma, etc • Các loại u gan thứ phát: di căn từ nơi khác • U gan lành tính Echinococcus, ... Trang 11Chống chỉ định CT • Có thai đặc biệt thời kỳ đầu • Dị ứng thuốc cản quang • Suy thận ( creatinin>1,5mg/dl hc ck thận ) • Chống cđ tương đối: tiểu đường dùng metformin, dừng 2 ngày trước ... khi chụp Trang 12 CT trong chẩn đoán khối u gan• CT không có CM giá trị như siêu âm • CT có CM thì giá trị phân biệt cao • U kt 0,3-0,8 cm thì khả năng phát hiện thấp • Độ nhạy CT với phát hiện

Ngày tải lên: 13/08/2014, 09:54

... resizing 84 4.6 Circular bins used for binary feature vector extraction 85 4.7 Constructing binary feature vector from TBI CT image: example 1 86 4.8 Constructing binary feature vector ... attributes describing thesize, location and architecture of the finding Findings found in a report are stored in instances of the finding entity RADA creates instances of the entities during Figure ... the images in the database Wepartitioned the brain image into bins and obtain a binary feature vector of the Trang 25query image and compare it with the binary features vectors representing otherimages

Ngày tải lên: 10/09/2015, 08:42

... sensor in terms of sensitivity and noise, focusing on the design and characterization of the multi-core sensing element materials using ferromagnetic micro-wires and investigating and modeling the ... sensors, and recruiting me in the Neurosensors Lab as a research fellow I am indebted to Prof Ding Jun in NUS and Prof Zhao Zhenjie in East China Normal University for their kind guidance and helpful ... carried out in this thesis The author would also like to thank Prof Li particularly for his invaluable help in selecting the proper and interesting research topic at the beginning, conveying the

Ngày tải lên: 11/09/2015, 10:18

... Arabs in Singapore begin by fixing their location in Singapore in Arab Street and its 80 Linda Boxberger, “Hadhrami Politics 1888-1967: Conflicts of Identity and Interest”, in Ulrike Freitag and ... this crisis was behind the murder of a prominent Arab merchant in Singapore In actual fact, the Arab elite’s political, religious and economic roles were often intertwined in Singapore A study ... Singapore’s Chinese, Malays and Indians (Singapore: Singapore University Press, 1984); Sharon Siddique, “Administration of Islam in Singapore”, in T Abdullah and S Siddique, eds Islam in Society in Southeast

Ngày tải lên: 07/10/2015, 10:10

... need to evaluating and mapping Landsurface temperature 3.2.2 Inherited method Inheriting the research that related to Land surface temperature mapping in andoutside of Viet Nam Collecting the documents ... analyzing the impact of landsurface temperature to the land cover types - The practical significance: Applying the knowledge on reality combine with collecting and analyzing data, assessing the ... works and factories built, resulting inland cover changes 2.1.2.4 The impact The land cover change had widely impact on climate and atmosphere The fullimpact of land cover change on climate and

Ngày tải lên: 28/04/2016, 13:45

... lancang river, More and m ore industries were introduced Trang 3 Workers exposed to dust and industrial noise can cause silicosis and occupational noise-induced deafness Trang 4suspected occupational ... factors in this area Trang 14 3 Enterprises and companies should enhance protection measurement and improve the working environment, especially to protect workers from noise more than 85 dB and ... Suspected silicosis at grade Ⅱ Pneumoconiosis in different industries Cement industry 0 0.0 Non-coal industry 6 100.0 Tobacco processing 0 0.0 Trang 10Results: （ % ） Noise occupational contraindication

Ngày tải lên: 07/08/2018, 08:38

... 5ix Abstract Digital Imaging and Communications in Medicine (DICOM) exists as a standard for handling, storing, printing, and transmitting information in medical imaging The DICOM files include ... different steps including smoothing, Sobel edge detection, connected component and finally region growing algorithms for locating and extracting the various lesions in the brain The computational ... misregistration of images in the lower lungs and upper abdomen In addition, if the CT data are used for attenuation correction, artifacts may be introduced into the SPECT images in those areas To

Ngày tải lên: 11/06/2019, 07:25

... alpha-fetoprotein, CEA carcinoembryonic antigen, TRG tumor regression grading Table 2 Comparison of clinical variables and radiomics score in the responding group and non-responding group in the training ... (GLRLM), and 11 grey level Size Zone Matrix (GLSZM) Feature reduction and model building The included patients were divided into the training and validation cohorts by a ratio of 7:3 using random-stratified ... odds ratio, CI confidence interval Fig 3 Receiver operating characteristics curves of the three scores in the training and validation cohorts a in the training cohort; b in the validation cohort

Ngày tải lên: 30/05/2020, 21:54

... drug-induced pneu-monitis, PAP, and usual interstitial pneumonia showing pulmonary “paving,” with P carinii- induced pneumonia being the most common [15]. Pulmonary alveolar proteinosis (including ... with cefoper-zone sodium/tazobactam and levofloxacin in case of pul-monary bacterial infection, which eventually showed no effectiveness He then underwent a CT-guided fine nee-dle aspiration biopsy ... case, and performed the literature search; JPZ and HLZ were responsible for screening abstracts, selecting manuscripts for full-text review, and performing the analysis; and WNX, GHZ, YJX, and

Ngày tải lên: 20/09/2020, 15:14

... creativity and motivation Trang 221.3.2 Impact of visuals in English language teaching and learning Like visuals used in teaching and learning other subjects, those implemented in teaching and learning ... language teaching and learning 1.3.1 Impact of visuals in teaching and learning As a matter of fact, visuals have long been used as an effective tool for teaching and learning This effectiveness ... comprehending texts through listening, reading and viewing, and composing texts through speaking, writing and creating In this sense, texts are considered as a medium of communication, and they

Ngày tải lên: 23/09/2020, 23:06

... diagnosis in an individual case in order to inform the clinical decision-making process This review illustrates the use of cranial CT and MRI, including diffusion weighted imaging (DWI), in the characterization ... surrounding normal brain tissue but also by an increase in interstitial water (vasogenic oedema) in and around the tumour Acute infarcts, on the other hand, cause mass effect by virtue of an increase ... important to keep in mind that fat can be misinterpreted as gas since the narrow window levels employed when interpreting brain CT examinations render fat much darker (and therefore closer in appearances

Ngày tải lên: 29/12/2020, 19:37

... sometime able to bring about misunderstanding because of the incorrect information from the image has noise, especially in the astronomy and medical Researching to remove noise has got great ... to detect it It is that this thesis tries to build a method of detecting noise in restoration of images It’s based on the character statistics of noise such as using mean and variance, using cross ... exactly; it is often subjective and based mostly on of one’s experience Detecting noise is just the first step to remove automatically noise in image Since noise is the random signal, we can use

Ngày tải lên: 16/04/2021, 04:29