Author: Oliver TaubmannPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Dynamic Cardiac Chamber Imaging in C-arm Computed Tomography
Author: Oliver Taubmann3-D Imaging of the Heart Chambers with C-arm CT. 3D-Bildgebung Der Herzkammern Mit C-Bogen-CT
Author: Kerstin MüllerPublisher:
ISBN: 9783832537265
Category :
Languages : en
Pages : 0
Book Description
Nowadays, angiography is the gold standard for the visualization of the morphology of the cardiac vasculature and cardiac chambers in the interventional suite. Up to now, high resolution 2-D X-ray images are acquired with a C-arm system in standard views and the diagnosis of the cardiologist is based on the observations in the planar X-ray images. No dynamic analysis of the cardiac chambers can be performed in 3-D. In the last years, cardiac imaging in 3-D using a C-arm system becomes of more and more interest in the interventional catheter laboratory. However, cardiac motion is a challenging problem in 3-D imaging, which leads to severe imaging artifacts in the 3-D image. Therefore, the main research goal of this thesis was the visualization and extraction of dynamic and functional parameters of the cardiac chambers in 3-D using an interventional angiographic C-arm system. In this thesis, two different approaches for cardiac chamber motion-compensated reconstruction have been developed and evaluated. The first technique addresses the visualization of the left ventricle. The second motion-compensated reconstruction approach uses volume-based motion estimation algorithms for the reconstruction of two left atrium and left ventricle - to four heart chambers. Overall, the results of this thesis highly demonstrate the feasibility of dynamic and functional cardiac chamber imaging using data from an interventional angiographic C-arm system for clinical applications.
Learning Cardiac Imaging
Author: Ramón RibesPublisher: Springer Science & Business Media
ISBN: 3540790845
Category : Medical
Languages : en
Pages : 160
Book Description
After the publication of Learning Diagnostic Imaging, which was an introductory teaching ? le to the ten radiological subspecialties included in the American Boards of Radiology, we began to write a series of teaching ? les on each radiological subspecialty. If the ? rst book of the series was mainly aimed at residents and provided them with an introductory tool to the study of radiology, the subsequent volumes of the series try to provide the reader with an introduction to the study of each radiological subspecialty. In Learning Cardiac Imaging, we intend to review cardiac imaging from the p- spective of the six imaging modalities usually performed to obtain anatomic and functional information of the heart. In old days, conventional radiographs gave us some information about the an- omy and, only secondarily, the pathophysiology of the heart. With the advent of echocardiography, the heart could be studied dynamically. Nuclear Medicine and Cardiac MR allowed the study of cardiac function. 32- and 64-detector multislice CT let us obtain images of the coronary tree in a noninvasive approach. Cardiac imaging is complex and many health care professionals are needed, ? rstly, in the obtention and, secondly, in the interpretation of the images. Not only rad- lologists, cardiologists, and nuclear medicine physicians are needed, specialized nurses and technicians are indispensable to obtain diagnostic images of such a dynamic anatomic structure as the heart. The authorship of the book re? ects its multidisciplinary approach of the book.
Cardiac C-Arm Computed Tomography
Author: Marcus PrümmerCardiac Imaging in Clinical Practice
Author: Dmitriy KireyevPublisher: Springer
ISBN: 3319214586
Category : Medical
Languages : en
Pages : 253
Book Description
This book provides a concise guide to echocardiography, SPECT, CT and MRI, including both the basics of cardiac imaging as well as tables of normal/abnormal values and guidelines. With advances in technology, cardiac CT and MRI are becoming more popular but are often limited to larger medical centers. By including the basics of these modalities, this book provides a comprehensive guide for a wide range of medical professionals. As physicians outside of cardiology often do not have sufficient exposure to nuclear stress tests, this book contains SPECT and stress test protocols in order to facilitate decision-making when ordering tests and interpreting results. Cardiac Imaging in Clinical Practice is a quick reference guide and will be useful at multiple levels of training, enabling the book to be used as a basic and advanced reference source. As such, it is appropriate for students, residents, fellows and staff attendings who want a practical and handy reference to the diagnostic options open to them.
Digital Cardiac Imaging
Author: Andrew J. BudaPublisher: Springer Science & Business Media
ISBN: 9400949960
Category : Medical
Languages : en
Pages : 461
Book Description
It Itis is 1984, 1984, a a year year immortalized immortalizedby by George GeorgeOrwell Orwell some some35 35 year year ago. ago. In In 1949, 1949,he he prophesized prophesized a a world worlddominated dominated by by television television images images and andelectronic electronic communica communica tions. Orwell's vision of an incredible technologic revolution is the reality of the tions. Orwell'svisionofanincredibletechnologicrevolutionistherealityofthe 1980's. 1980's. Over Over the the past past three threedecades, decades, this this technical technicalexplosion explosion has has impacted impacted on on all all levels levelsof of society, society, including including the the practice practice of ofMedicine. Medicine. In 1949, the cardiologist had available to him only his stethoscope, the chest In1949,thecardiologisthadavailabletohimonlyhisstethoscope, thechest roentgenogram, roentgenogram, the theelectrocardiogram, electrocardiogram, and and his hisclinical clinical astuteness. astuteness. In In 1984, 1984, the the cardiologist still requires great clinical skills, but also has available to him echo cardiologiststillrequiresgreatclinicalskills, butalsohasavailabletohimecho cardiography, cardiography, radionuclide radionuclideperfusion perfusion and and functional functional tests, tests, digital digital radiography, radiography, computed computed tomography, tomography, positron positronemission emission tomography, tomography, and and nuclear nuclearmagnetic magnetic resonance resonanceimaging. imaging. These These imaging imagingmodalities modalities are are the theresult result of ofthe the development developmentof of the the digital digitalcomputer, computer, and and the theexplosive explosive advances advances in in microelectronics. microelectronics. Cardiac Cardiac imaging imaginghas has rapidly rapidlyevolved evolved into intoa a specialized specialized area area of of interest interestshared shared by by cardiolo cardiolo gists, radiologists, engineers, physicists, and statisticians. Our book, Digital gists, radiologists, engineers, physicists, andstatisticians.
3-D Imaging of Coronary Vessels Using C-arm CT
Author: Chris SchwemmerPublisher: Logos Verlag Berlin GmbH
ISBN: 3832549374
Category : Medical
Languages : en
Pages : 148
Book Description
Cardiovascular disease has become the number one cause of death worldwide. For the diagnosis and therapy of coronary artery disease, interventional C-arm-based fluoroscopy is an imaging method of choice. While these C-arm systems are also capable of rotating around the patient and thus allow a CT-like 3-D image reconstruction, their long rotation time of about five seconds leads to strong motion artefacts in 3-D coronary artery imaging. In this work, a novel method is introduced that is based on a 2-D-2-D image registration algorithm. It is embedded in an iterative algorithm for motion estimation and compensation and does not require any complex segmentation or user interaction. It is thus fully automatic, which is a very desirable feature for interventional applications. The method is evaluated on simulated and human clinical data. Overall, it could be shown that the method can be successfully applied to a large set of clinical data without user interaction or parameter changes, and with a high robustness against initial 3-D image quality, while delivering results that are at least up to the current state of the art, and better in many cases.
Cardiovascular Computed Tomography
Author: James StirrupPublisher: Oxford University Press
ISBN: 0192537148
Category : Medical
Languages : en
Pages : 577
Book Description
Recent years have seen a marked increase in cardiovascular computed tomography (CT) imaging, with the technique now integrated into many imaging guidelines, such as those published by ESC and NICE. Rapid clinical and technological progress has created a need for guidance on the practical aspects of CT image acquisition, analysis and interpretation. The Oxford Specialist Handbook of Cardiovascular CT, now revised for the second edition by practising international experts with many years of hands-on experience, is designed to fulfil this need. The Handbook is a practical guide on performing, analysing and interpreting cardiovascular CT scans, covering all aspects from patient safety to optimal image acquisition to differential diagnoses of tricky images. It takes an international approach to both accreditation and certification, highlighting British, European, and American examinations and courses. The format is designed to be accessible and is laid out in easy to navigate sections. It is meant as a quick-reference guide, to live near the CT scanner, workstation, or on the office shelf. The Handbook is aimed at all cardiovascular CT users (Cardiologists, Radiologists and Radiographers), particularly those new to cardiovascular CT, although even the advanced user should find useful tips and tricks within.
C-arm Inverse Geometry CT for 3D Cardiac Chamber Mapping
Author: Jordan M. SlagowskiPublisher:
ISBN:
Category :
Languages : en
Pages : 196
Book Description
Image-guided navigation of catheter devices to anatomic targets within large 3D cardiac chambers and vessels is challenging in the interventional setting due to the limitations of a conventional 2D x-ray projection format. Scanning-beam digital x-ray (SBDX) is a low-dose inverse geometry x-ray fluoroscopy technology capable of real-time 3D catheter tracking. SBDX performs rapid tomosynthesis using an electronically scanned multisource x-ray tube and photon-counting detector mounted to a C-arm gantry. While this technology could facilitate 3D image-guided navigational tasks, SBDX currently lacks the ability to perform volumetric computed tomography from a rotational C-arm scan. C-arm CT is an expected feature of interventional x-ray systems that could provide, for example, the necessary 3D cardiac chamber roadmap during catheter ablation of left atrial fibrillation. This work develops a novel volumetric CT capability for the SBDX platform, termed C-arm inverse geometry CT, suitable for rotational scans of the beating heart. The work is divided into three tasks: development of image reconstruction algorithms, implementation on the SBDX hardware, and performance assessment for the example task of 3D cardiac chamber mapping. SBDX-CT data acquisition is performed by simultaneous x-ray source scanning at 15 scan/s and C-arm rotation over a 190o short-scan arc in 13.4 seconds. An iterative reconstruction method based on prior image constrained compressed sensing was developed to accommodate fully truncated projections and data inconsistency resulting from cardiac motion during rotation. Hardware implementation included development of a C-arm angle measurement method, development of a geometric calibration method to account for non-ideal C-arm rotations, and detector response nonlinearity correction. The geometric calibration procedure mitigated artifacts from C-arm deflection during rotation. SBDX-CT image quality was evaluated in terms of artifacts, uniformity, and spatial resolution in a series of static phantom studies. Dynamic phantom studies evaluated chamber segmentation accuracy in the presence of chamber motion and field-of-view truncation. Segmentation error was quantified as the 99th percentile of a histogram of the surface deviations from the reference. For a chest phantom containing an atrium undergoing 60-88.2 cycle/minute motion and imaged at 50% full power, segmentation errors were 3.0-4.2 mm. Feasibility of in-vivo SBDX-CT was demonstrated in a porcine model.
Cardiovascular Imaging
Author: Vincent HoPublisher: Elsevier Health Sciences
ISBN: 1455706973
Category : Medical
Languages : en
Pages : 1784
Book Description
Cardiovascular Imaging, a title in the Expert Radiology Series, edited by Drs. Vincent Ho and Gautham P. Reddy, is a comprehensive 2-volume reference that covers the latest advances in this specialty. It provides richly illustrated, advanced guidance to help you overcome the full range of diagnostic, therapeutic, and interventional challenges in cardiovascular imaging and combines an image-rich, easy-to-use format with the greater depth that experienced practitioners need. Online access at www.expertconsult.com allows you to rapidly search for images and quickly locate the answers to any questions. Access the fully searchable text online at www.expertconsult.com, along with downloadable images. View 5000 full-color digital images of both radiographic images and cutting-edge modalities—MR, multislice CT, ultrasonography, and nuclear medicine. Tap into comprehensive coverage that includes diagnostic and therapeutic options, with an emphasis on cost-effective imaging. Consult the experience of a diverse group of experts on cardiovascular imaging from around the globe. Find information quickly and easily thanks to consistent and tightly focused chapters, a full-color design, and key points boxes.