155 Hits in 3.2 sec

Colonic Polyp Segmentation in CT Colonography-Based on Fuzzy Clustering and Deformable Models

J. Yao, M. Miller, M. Franaszek, R.M. Summers
2004 IEEE Transactions on Medical Imaging  
An automatic method to segment colonic polyps in computed tomography (CT) colonography is presented in this paper.  ...  The polyp segmentation was also applied in computer-aided detection (CAD) to reduce the number of false positive (FP) detections and provide volumetric features for polyp classification.  ...  Dwyer, MD, for critical reviews of the manuscript. They also thank C. D. Johnson, MD, of the Mayo Clinic for providing CT colonography data sets.  ... 
doi:10.1109/tmi.2004.826941 pmid:15554123 fatcat:cefwnj73xzfipekkciw3lqqplm

Comparison of 64-Detector CT Colonography and Conventional Colonoscopy in the Detection of Colorectal Lesions

Cigdem Devir, Mahmut Kebapci, Tuncer Temel, Aysegul Ozakyol
2016 Iranian Journal of Radiology  
Modalities that allow examination of the entire colon are conventional colonoscopy, double contrast barium enema examination and multi-detector computed tomography (MDCT) colonography.  ...  CT colonography is a safe and minimally invasive technique, a valuable diagnostic tool for examining the entire colon and a good alternative compared to other colorectal cancer screening tests because  ...  Computed tomography (CT) colonography is an imaging modality that has been rapidly developing since its discovery in 1994 by Vining (4) .  ... 
doi:10.5812/iranjradiol.19518 pmid:27110333 pmcid:PMC4835868 fatcat:delnz5en6nawbabyyb56qcplw4

The feasibility of colorectal cancer detection using dual-energy computed tomography with iodine mapping

T.N. Boellaard, O.D.F. Henneman, G.J. Streekstra, H.W. Venema, C.Y. Nio, M.C. van Dorth-Rombouts, J. Stoker
2013 Clinical Radiology  
Materials and Methods: Consecutive patients scheduled for preoperative staging computed tomography (CT) because of diagnosed or high suspicion for colorectal cancer were prospectively included in the study  ...  The feasibility of colorectal cancer detection using dual-energy computed tomography with iodine mapping 145 157  ...  For all segments combined, 3.2% Table 1 1 Computed tomography (CT) value measurements.  ... 
doi:10.1016/j.crad.2013.03.005 pmid:23615035 fatcat:5w3em2yqd5ejfh46fkwrea7kxu

A Pipeline for Computer Aided Polyp Detection and Segmentation in Ct Colonography

Janapriya A.S, Mythili C, Nishanthi P, Sunitha K
2014 IOSR Journal of Electronics and Communication Engineering  
CAD-CTC helps the radiologists for the automatic detection of suspicious polyps in the CT images of the colon.  ...  In the proposed CAD system, segmentation of the colon is done by Otsu's method of thresholding and clustered by k-means for extraction of the candidates.  ...  Thus this method of screening technique of CAD-CTC(Computer Aided Diagnosis-Computer Tomography Colonography) with variations in the segmentation and classification has been really effective in identifying  ... 
doi:10.9790/2834-09436875 fatcat:jogtotzcj5gonpjrr5bhkakj2u

Virtual Colonoscopy: Indications, Techniques, Findings [chapter]

Mutlu Saglam, Fatih Ors
2011 Endoscopic Procedures in Colon and Rectum  
[2, [30] [31] [32] Data acquisition CT scanning is ideally performed on a multi-detector computed tomography (MDCT) scanner in both the supine and the prone positions with a thin collimation.  ...  [3, 58] Computer-aided detection (CAD) systems are software programs that automatically highlight polyp "candidates" and thus support the radiologist by pointing out possible abnormalities that may  ...  Endoscopic procedures in colon and rectum presents nine chapters which start with introductory ones like screening by colonoscopy as the preparation and monitoring for this exam.  ... 
doi:10.5772/19651 fatcat:4un2nfvawjdyxjw2y323vhibeu

A new filtering algorithm for medical magnetic resonance and computer tomography images

Erich Stoll, Christian Stern, Peter Stucki, Simon Wildermuth
1999 Journal of digital imaging  
Inner views of tubular structures based on computer tomography (CT) and magnetic resonance (MR) data sets may be created by virtual endoscopy.  ...  After a preliminary segmentation procedure for selecting the organ to be represented, the virtual endoscopy is a new postprocessing technique using surface or volume rendering of the data sets.  ...  V rIRTUAL ENDOSCOPY VIEWING (VIE) is a new post processing technique of computer tomography (CT) and magnetic resonance (MR) data sets that allows one to create inner views of tubular structures. 1 Endoscopic  ... 
doi:10.1007/bf03168623 pmid:10036664 pmcid:PMC3452428 fatcat:woe3gqgasjgi5jl2bsr5ooeshe

CT Colonography with Computer-aided Detection: Recognizing the Causes of False-Positive Reader Results

Igor Trilisky, Abraham H. Dachman, Kristen Wroblewski, Michael W. Vannier, John M. Horne
2014 Radiographics  
Computed tomography (CT) colonography is a screening modality used to detect colonic polyps before they progress to colorectal cancer.  ...  Computer-aided detection (CAD) is designed to decrease errors of detection by finding and displaying polyp candidates for evaluation by the reader.  ...  Introduction CT Colonography and Computer-aided Detection Computed tomography (CT) colonography is a screening modality used to detect colonic polyps before they progress to colorectal cancer (1) (2)  ... 
doi:10.1148/rg.347130053 pmid:25384290 pmcid:PMC4386870 fatcat:cdyv2ixnm5hajoy5z3yf4i2u3q

Performance of computed tomographic colonography for the screening of colorectal polyp in acromegalic patients: a prospective study

Odery Ramos Jr., César Luiz Boguszewski, Sandra Teixeira, Ricardo De Bem, Benito Parolim, João Carlos Prolla
2009 Arquivos de Gastroenterologia  
Computed tomographic colonography was performed with a GE Helical Multislice Computed Tomography Apparatus.  ...  OBJECTIVE: To analyze computed tomographic colonography performance for the screening of colorectal polyps in acromegalic patients.  ...  Juarez Gabardo for the statistical analysis of the study and Professor Dr. Guilberto Minguetti, of the Computed Tomographic Center, for his technical support.  ... 
doi:10.1590/s0004-28032009000200003 pmid:19578607 fatcat:4oohau7bqrelrdoqhkh4vonqfm

Automatic Segmentation of Colon in 3D CT Images and Removal of Opacified Fluid Using Cascade Feed Forward Neural Network

K. Gayathri Devi, R. Radhakrishnan
2015 Computational and Mathematical Methods in Medicine  
Colon segmentation is an essential step in the development of computer-aided diagnosis systems based on computed tomography (CT) images.  ...  The proposed work is focused on designing an efficient automatic colon segmentation algorithm from abdominal slices consisting of colons, partial volume effect, bowels, and lungs.  ...  Computer-aided detection for computed tomography colonography aims at facilitating the detection of colonic polyps.  ... 
doi:10.1155/2015/670739 pmid:25838838 pmcid:PMC4369940 fatcat:f5j24i7rkjgsxj5afh4mxpht3e

Establishing Spatial Correspondence between the Inner Colon Surfaces from Prone and Supine CT Colonography [chapter]

Holger Roth, Jamie McClelland, Marc Modat, Darren Boone, Mingxing Hu, Sebastien Ourselin, Greg Slabaugh, Steve Halligan, David Hawkes
2010 Lecture Notes in Computer Science  
Colonography is an important screening tool for colorectal lesions.  ...  This paper presents a method for establishing spatial correspondence between prone and supine inner colon surfaces reconstructed from CT colonography.  ...  These drawbacks have led to the development of alternative screening methods such as computed tomography colonography, which is becoming established as a standard screening tool for the detection and diagnosis  ... 
doi:10.1007/978-3-642-15711-0_62 fatcat:yijedtpf2rbw5nugr42wnuebzi

Special Session on Abdominal CAD

2008 International Journal of Computer Assisted Radiology and Surgery  
Acknowledgments This study was supported in part by a Grant-in-Aid for Scientific Research from the Ministry of Education, Culture, Sports, Science, and Technology, Japan, and a Grant-in-Aid for Cancer  ...  based on contrast-enhanced computed tomography (CT) or magnetic resonance imaging (MRI).  ...  As a new technique, computer-aided detection (CAD) for virtual colonoscopy (VC) utilizes the difference in morphology and other features between polyps and normal tissues to detect colonic polyps automatically  ... 
doi:10.1007/s11548-008-0193-x fatcat:2keil6uhbndanix77qqxoofd3u

Computer-aided Diagnosis Scheme for Detection of Polyps at CT Colonography

Hiroyuki Yoshida, Janne Näppi, Peter MacEneaney, David T. Rubin, Abraham H. Dachman
2002 Radiographics  
CAD-CTC helps the radiologists for the automatic detection of suspicious polyps in the abdominal CT images of the colon.  ...  In the proposed CAD system, segmentation of the colon is done by otsu's method of thresholding and clustered by K-Means clustering for the extraction of the features such as intensity texture and volume  ...  Computed tomographic colonography (CTC) or virtual colonoscopy is an evolving method for detecting colon polyps which records the 3D image of the patient's abdomen [2] .  ... 
doi:10.1148/radiographics.22.4.g02jl16963 pmid:12110726 fatcat:sebgej7rxfbhtkuojuqay45lgy

Colorectal Cancer Detection using Image Processing based on IGVF Model

G. Shantha Lakshmi, Prof. B. Mohamed FaizeBasha
2014 IOSR Journal of Computer Engineering  
Computed Tomography (CT) Colonography is a valid technique for detecting and screening colorectal cancers.  ...  It is expected to obtain greater accuracy and to produce good segmentation results of colonic polyps.  ...  Computer tomographic colonography is a minimally invasive technique and rapidly evolving diagnostic tool for the location, detection and identification of benign polyps on the colon wall on the early stage  ... 
doi:10.9790/0661-16233943 fatcat:cowgi2vi3zcptj5ekylgwbwnbi

Automated image-based colon cleansing for laxative-free CT colonography computer-aided polyp detection

Marius George Linguraru, Neil Panjwani, Joel G. Fletcher, Ronald M. Summers
2011 Medical Physics (Lancaster)  
Purpose: To evaluate the performance of a computer-aided detection (CAD) system for detecting colonic polyps at noncathartic computed tomography colonography (CTC) in conjunction with an automated image-based  ...  The results are robust on fine details around folds, thin-stool linings on the colonic wall, near polyps and in large fluid/stool pools.  ...  INTRODUCTION With the advent of large screening programs for colon cancer, computed tomography colonography (CTC) has become a viable tool for the noninvasive detection of polyps and a complement or alternative  ... 
doi:10.1118/1.3662918 pmid:22149845 pmcid:PMC3254579 fatcat:efrjcwb2ojg2na4fb4lv7ngh4m

Automatic Electronic Cleansing in Computed Tomography Colonography Images using Domain Knowledge

KN Manjunath, PC Siddalingaswamy, GK Prabhu
2016 Asian Pacific Journal of Cancer Prevention  
The method was implemented with multithreading for parallel processing in a high performance computer.  ...  It uses a new edge model-based method which involves colon segmentation, priori information of Hounsfield units (HU) of different colonic contents at specific tube voltages, subtracting the tagging materials  ...  We extend our sincere thanks to Microsoft for volume rendering SDK. It is used only for academic research and not for any commercial purpose.  ... 
doi:10.7314/apjcp.2015.16.18.8351 fatcat:csggkmycanbq7bijbs4mphhwm4
« Previous Showing results 1 — 15 out of 155 results