Jan 08, 2019 although investigators experimented with dual energy ct in the early years of ct at the end of the 1970s 5,6, dual energy ct has been used in clinical practice only since 2006, with the advances in ct technology targeting the early weaknesses of dual energy ct, such as the disproportionate radiation dose compared with conventional single. Uses in clinical practice with recent advances in dualsource dualenergy computed tomography. Mar 26, 2020 dual energy ct perfusion imaging for differentiating who subtypes of thymic epithelial tumors. After installation of dualenergy ct in routine clinical practice, clinicians have been able to effectively identify this perfusion abnormality on iodine maps derived from dualenergy ct data.
Novel clinical applications of dual energy computed. Update of dualenergy ct applications in the genitourinary tract. In comparison to dualenergy ct used in clinical practice, recently developed energysensitive photon. Furthermore, a metaanalysis reported on the capability of contrastenhanced cta with and without dualenergy ct or electrocardiogramgated adct. Dual energy ct dual energy ct dect is a new and powerful imaging technique. In clinical practice today, two different spectra are generated either by switching the voltage of one xray tube or by running two tubes at different voltages, and spectral information is. The clinical practice, adaptation and techniques of dual energy ct is broken into individual articles. Dualenergy ct for the musculoskeletal system radiology. Aug 25, 2016 dual energy ct, in which two views at differing kilovoltages are obtained at each ct level, has several important applications in the ct evaluation of vascular disease. In comparison to dualenergy ct used in clinical practice, recently developed energysensitive photoncounting detectors sample the materialspecific attenuation. Dualenergy ct perfusion imaging for differentiating who. Contrastenhanced ct and mribased perfusion assessment.
Applications include characterization of renal stones 57, visualization of lung perfused blood volume and ventilation 811 as well as assessment of myocardial perfused blood volume 1214. Dualenergy computed tomography dect is a recently developed advanced imaging technology with a number of clinical applications. Uses in clinical practice with recent advances in dualsource dualenergy computed tomography ct, highquality diagnostic images can. With the advent of the first dual source dual energy capable scanner in 2006 there has been a relative explosion in interest and integration of dect into clinical practice.
Download citation abdominal dualsource dualenergy ct. Xray ct images are three dimensional reconstructions of the effective photon linear attenuation coefficient. Dualenergy ct describes the exposition of tissue by two different xray spectra. Dual energy computed tomography ct is one of the most promising and interesting new technologies in ct. In comparison to dual energy ct used in clinical practice, recently developed energy sensitive photoncounting detectors sample the materialspecific attenuation curves at multiple energy levels and within narrow energy bands. Dualenergy ct or multispectral ct is becoming increasingly more common in clinical practice due to the rapid rise in computer technology and expanding literature exhibiting vast advantages over conventional single energy ct. With dual energy imaging, only one ct study is acquired, but the imaging data can be used in a variety of additional methods to improve clinical decisionmaking. Dualenergy ct refers to the acquisition of computed tomography ct datasets at 2 different energy spectra. Although each of the major ct manufacturers is investigating dualenergy acquisition and reconstruction techniques, at present, a greater range of clinical applications and software tools has been developed for use with the dualsource system. Using dect, additional datasets can be created next to conventional images. With the recently developed dual energy ct technique, the clinical utility of ct in the pulmonary diseases could be expanded. Sep 14, 2016 with the advent of the first dual source dual energy capable scanner in 2006 there has been a relative explosion in interest and integration of dect into clinical practice. Dual energy ct dect is a new technique that allows differentiation of materials and tissues based on ct density values derived from two synchronous ct acquisitions at different tube potentials. Dual energy computed tomography an overview sciencedirect.
While the practical clinical applications of dualenergy ct are almost exclusively 21st century developments, the conceptualization and evolution of this technology dates back to the time of ct inception in the 1970s when di chiro and millner published findings on the variability of tissue signatures at. Current and emerging clinical applications of dual and multienergy ct. Clinical evaluation of a dual energy ct system the safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Nov 01, 20 dual energy ct refers to the acquisition of computed tomography ct datasets at 2 different energy spectra. To investigate the feasibility of using dualenergy ct dect for tissue segmentation and kilovolt kv. Dualenergy ct is a novel, rapidly emerging imaging technique which offers important. Therefore, the dual source ct system is most frequently used for dual energy ct based perfusion assessment in routine clinical practice. Dual energy ct has been introduced into clinical practice through the development of the dual source ct machine enabling a simultaneous acquisition of two different spectra. For the rheumatologist, the most exciting application is the ability of dect to specifically detect deposition of monosodium urate msu crystals. Developing dual energy ct applications for pediatric imaging. Dual energy with dual source ct and kvp switching with single source ct. Monoenergetic extrapolation of cardiac dualenergy computed tomography dect could be useful in artifact reduction in clinical practice. Clinical applicaon of dualsource dualenergy ct in children. Clinical applications of dualenergy computed tomography.
The main focus is on the use of dualenergy ct in daily clinical practice, and individual sections are devoted to imaging of the vascular system, the thorax, the abdomen, and the extremities. We predict a wide range of the dual energy applications in pediatric imaging that are well justified in dose and. Schonberg, and maximilian reiseris a comprehensive textbook that provides general background of the physical principles of the technology as well as practical advice about clinical. Dual energy ct clinical applications radiology reference. Dualenergy ct perfusion imaging for differentiating who subtypes of thymic epithelial tumors. Update of dualenergy ct applications in the genitourinary. Siemens says that its twinbeam dual energy approach is unique in that it enables acquisition of this data without introducing additional radiation a doseneutral dual energy approach. Dualenergy ct dect is a new technological development whereby images can be reconstructed based on a twomaterial decomposition algorithm that can separate calcium from monosodium urate figure 5812. The recent development of dualsource scanning has increased the diagnostic value and clinical applications of ct and made. Aug 24, 2015 current and emerging clinical applications of dual and multienergy ct. Dual energy ct offers exciting applications and possibilities previously unavailable with conventional single energy ct. Monoenergetic extrapolation of cardiac dual energy ct for.
The recent development of dual source scanning has increased the diagnostic value and clinical applications of ct and made dual energy ct feasible for routine clinical use. Dual energy ct or multispectral ct is becoming increasingly more common in clinical practice due to the rapid rise in computer technology and expanding literature exhibiting vast advantages over conventional single energy ct clinical applications. This has resolved previous experimental problems with dual energy imaging regarding coregistration 2, 3, 4. The potential benefits of dect include increased lesion detection and characterization, improved oncologic staging and evaluation of treatment response, and reduced artifacts, all at comparable or even reduced radiation doses. Novel clinical applications of dual energy computed tomography. Dualenergy ct has remained underutilized over the past decade probably due to a cumbersome workflow issue and current technical limitations. Dual energy ct in clinical practice thorsten johnson. Clinical evaluation of a dual energy ct system full text. Pdf download dual energy ct in clinical practice medical. The main focus is on the use of dual energy ct in daily clinical practice, and individual sections are devoted to imaging of the vascular system, the thorax, the abdomen, and the extremities.
Improvements in temporal resolution together with new methods for reducing radiation doses and improving coregistration have made a dramatic improvement in dect technology. Advanced abdominal imaging with dual energy ct is feasible. Although investigators experimented with dualenergy ct in the early years of ct at the end of the 1970s 5,6, dualenergy ct has been used in clinical practice only since 2006, with the advances in ct technology targeting the early weaknesses of dualenergy ct, such as the disproportionate radiation dose compared with conventional single. Listing a study does not mean it has been evaluated by the u. Dualenergy ct in head and neck imaging springerlink. Pdf download dual energy ct in clinical practice free.
Krasnicki t1, podgorski p, guzinski m, czarnecka a, tupikowski k, garcarek j, marek sasiadek m. In clinical practice, the use of asirv may reduce ct patient dose depending on the clinical task, patient size, anatomical location and clinical practice. The analysis of this dualenergy data provides information related to the varying response of tissues to xrays at different energies dualenergy ct has been introduced into clinical practice through the development of the dualsource ct machine enabling a simultaneous acquisition. A consultation with a radiologist and a physicist should be made to determine the appropriate dose to obtain diagnostic image quality for the particular clinical task. Pdf clinical applications of dualenergy ct in head and. Applications of dual energy ct in clinical practice. Dualenergy computed tomography neuroimaging clinics. Methods diagnostic singlecentre study of 40 patients with active gout, and 41 individuals with other types of joint disease.
Due to its large file size, this book may take longer to download. The clinical practice, adaptation and techniques of dualenergy ct is broken into individual. Dual energy ct in clinical practiceedited by thorsten r. Springer nature is making sarscov2 and covid19 research free. Dual energy computed tomography dect is an exciting development in ct technology and has multiple clinical benefits 14.
Comparison of single and dual energy ct for stopping power. Dualenergy computed tomography implementation and usage in clinical. Dual energy ct has remained underutilized over the past decade probably due to a cumbersome workflow issue and current technical limitations. Dec 21, 2015 with dual energy imaging, only one ct study is acquired, but the imaging data can be used in a variety of additional methods to improve clinical decisionmaking.
The recent development of dualsource scanning has increased the diagnostic value and clinical applications of ct and made dualenergy ct feasible for routine clinical use. Nov 01, 2011 dualenergy computed tomography ct is one of the most promising and interesting new technologies in ct. Virtual monochromatic images from dual energy multidetector ct. In clinical practice today, two different spectra are generated either by switching the voltage of one xray tube or by running two tubes at different voltages, and spectral information is gained from two absorption measurements with normal ct. While the practical clinical applications of dual energy ct are almost exclusively 21st century developments, the conceptualization and evolution of this technology dates back to the time of ct inception in the 1970s when di chiro and millner published findings on the variability of tissue signatures at. Clinical applicaon of dual source dual energy ct in children jing qi, md, eric eutsler, md, and marilyn siegel, md pediatric radiology, mallinckrodt instute of radiology washington university school of medicine st. Has provided clear clinical guidelines as we begin to implement clinical dual energy protocols in pediatric imaging. Virtual monochromatic images from dualenergy multidetector ct. Dual source dual energy ct allows the use of up to a 0. Table of contents download front matter download chapter physical backgroud thorsten r.
Utility of dualenergy ct to evaluate patients with hip. The dect ability of material differentiation allows bone removal in various ct angiography studies and bone marrow edema depiction, while with. The maximum energy of the photons is defined by the voltage, whereas the mean energies are significantly lower and their differences smaller than one may expectfor 76 and 56kev mean energy, keywords. Contrastenhanced ct and mribased perfusion assessment for.
Objectives to assess the accuracy of dualenergy ct dect for diagnosing gout, and to explore whether it can have any impact on clinical decision making beyond the established diagnostic approach using polarising microscopy of synovial fluid diagnostic yield. With the recently developed dualenergy ct technique, the clinical utility of ct in the pulmonary diseases could be expanded. Dualenergy ct uses two xray spectra enabling material differentiation by analysing materialdependent photoelectric and compton effects. Clinical applications of dualenergy computed tomography for. The impact of dual energy ct imaging on dose calculations for preclinical studies ana vaniqui, lotte e. With the introduction of a new dual source ct system, this technique can now be used routinely in abdominal imaging. Because of the strong energy e dependence of the linear attenuation coefficient.
Objectives to assess the accuracy of dual energy ct dect for diagnosing gout, and to explore whether it can have any impact on clinical decision making beyond the established diagnostic approach using polarising microscopy of synovial fluid diagnostic yield. Dualenergy ct is a novel, rapidly emerging imaging technique which offers. Since the introduction of dualsource ct scanners and scanners capable of fast tube potential kilovoltage switching, dualenergy ct has been applied in many clinical areas, including automatic bone removal, stone composition characterization 24, virtual unenhanced imaging 5, 6, diagnosis of gout 7, 8, and assessment of myocardial blood supply. Siegel, md, juan carlos ramirezgiraldo, phd, and anno graser, md dual energy ct refers to the acquisition of computed tomography ct datasets at 2 different energy spectra. To explain the technique of dualenergy ct dect and highlight its applications and advantages in head and neck radiology. Dualenergy computed tomography ct is one of the most promising and interesting new technologies in ct. Dect works by acquiring attenuation data using two different xray spectra. Kalender dual source ct bernhard krauss, bernhard schmidt, thomas g. Dual energy ct in clinical practice thorsten johnson springer. The term dualenergy ct, or dect, refers to ct that uses two photon spectra. Dedicated software creates overlay of the low and high energy images, in which enhancement of tissues with iodine can be better appreciated and quantified compared to standard ct. Dualenergy ct may have disappeared from clinical consideration in the 1980s, but with the tremendous technical advances that have taken place since that time, modern ct technology is now capable of taking full advantage of the fundamental physicsand clinical promisethat godfrey hounsfield envisioned in 1973. Dual energy ct dect is a new technological development whereby images can be reconstructed based on a twomaterial decomposition algorithm that can separate calcium from monosodium urate figure 5812. Dual energy computed tomography dect is a recently developed advanced imaging technology with a number of clinical applications.
Indeed, in practice, when the additional information provided by the dect mode. Dual energy computerized tomography dect in patients. Dual energy ct in clinical practice edited by thorsten r. The main focus is on the use of dualenergy ct in daily clinical practice, and.
It now appears possible to provide a comprehensive evaluation of ischemic heart disease through a single, standalone imaging modality. Methods diagnostic singlecentre study of 40 patients with active gout, and 41 individuals with other. Medical radiology, springerverlag berlin heidelberg. Clinical implementation of dualenergy ct for proton treatment planning on pseudomonoenergetic ct scans int j radiat oncol biol phys, 97 2017, pp. Purpose to evaluate the potential of monoenergetic extrapolation of cardiac dect data for reducing artifacts from metal and high iodine contrast concentration. Attenuation data acquired at a second x ray spectrum allows decomposition of different materials.
Computed tomography ct has been the core imaging modality for the evaluation of thoracic disorders. Although their ct system and data acquisition methods are different, all three methods make it possible to demonstrate iodine distribution maps within the lungs in patients with pulmonary vascular diseases. Siemens brings doseneutral dual energy into ct clinical. Elemental concentrations can thereby be determined using threematerial decomposition algorithms. The impact of dual energy ct imaging on dose calculations. In comparison to dualenergy ct used in clinical practice, recently developed energysensitive photoncounting detectors sample the materialspecific attenuation curves at multiple energy levels and within narrow energy bands. The clinical practice, adaptation and techniques of dualenergy ct is broken into individual articles. Both the amount of contrast material and the rate of injection can be slowed for chest dual energy ct compared with those for single energy ct because of the increased.
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