A ct computed tomography scan is a noninvasive medical test that uses xrays to produce multiple images or pictures of the inside of the body and a computer to join them together in crosssectional views of the area being studied. Notwithstanding the benefits to the patient undergoing a ct study, the fundamental concern in radiation protection. Techniques involve contrast bolus, various phases of contrast enhancement, multiplanar reconstruction, volume rendering, and. Comparison of wholebody computed tomography vs selective.
Over the last few decades, the rapid development of cardiac computed tomography ct has been unequalled by any other imaging technique. Vascular air embolism after contrast administration on 64 row. Abstract computed tomography ct technology has changed considerably in recent years with the introduction of increasing numbers of multiple detector arrays. The twodimensional detector array permits ct scanners to acquire multiple. Method for acquiring and reconstructing an image of a thin crosssection of an. All new ct systems are mdct, and a number of new dose reduction tools have become available commercially. Calcium scoring, ct angiography, and assessment of ventricular function can be performed with multiplerow detector ct,2. Vascular air embolism after contrast administration on 64 row multiple detector computed tomography. The introduction of single detector helical computed tomography sdct in 1989 was the first step in a transition from viewing ct as a series of sequential axial sections to perceiving each examination as a volumetric acquisition of anatomic. Jul 26, 2012 radiographically detectable coronary artery calcium cac is a well recognized marker of subclinical coronary heart disease. Radiographically detectable coronary artery calcium cac is a well recognized marker of subclinical coronary heart disease. Abstractcomputed tomography ct technology has changed considerably in recent years with the introduction of increasing numbers of multiple detector arrays. Learn vocabulary, terms, and more with flashcards, games, and other study tools.
It is possible to treat the problem of diffusion tomography, as occurs, e. Health, general aneurysm aneurysms cat scans ct imaging detection equipment detectors. Computed tomography ct computed tomography ct involves using an xray tube coupled to a detector system, encased within a doughnut shaped gantry. Multidetector computed tomographic angiography of the. Reumann 2, konstantin nikolaou 1,3 and fabian springer 1,3. Multiple detector computed tomography after direct lymphangiography provides a safe and accurate examination method and is an excellent tool for.
While the diagnostic information obtained from mdct imaging is extremely valuable, it is important to ensure that the radiation doses resulting from. The term computed tomography, or ct, refers to a computerized xray imaging procedure in which a narrow beam of xrays is aimed at a patient and quickly rotated around the body, producing signals that are processed by the machines computer to generate crosssectional imagesor slicesof the body. In addition to the spiral method for collecting computed tomography data, having multiple rows of detectors results in four shown here or more slices being imaged during each revolution of the tube. The driving forces behind cardiac multidetectorrow ct mdct are the enormous socioeconomic relevance of coronary artery disease cad and the need for comprehensive, reliable and reproducible diagnostic tests that overcome the morbidity and. Background computed tomography ct technology and its clinical applications have shown enormous. Over the past decade, multipledetector computed tomography mdct scanners have transformed the imaging field. Fundamentals of single and multiple row detector computed. Multiple images are acquired in a sequence by a rotating xray tube. Rapid assessment of multiple organ systems has made ct popular among radiologists and clinicians alike. Mdct a form of computed tomography ct technology for diagnostic imaging. Systems such as the toshiba aquilion 64 provide physicians and patients with many diagnostic benefits, since they are a faster, less.
There are several parameters specific to multidetector computed tomography mdct scanners that increase or decrease patient dose systematically compared to older single detector. With a small field of view for a camerabased detection system, the neutron flux per pixel decreases, and measurement time increases. A computed tomography ct or cat scan allows doctors to see inside your body. Managing patient dose in multidetector computed tomographymdct.
Anastasio4 1 department of electrical and computer. Multidetector computed tomography an overview sciencedirect. Wernick 1,4, dean chapman2, zhong zhong3, carol muehleman5, jun li5, mark a. The aim of this study was to determine optimal window settings for conventional polyenergetic and virtual monoenergetic images derived from computed tomography pulmonary angiogram ctpa examinations of a novel duallayer spectral detector computed tomography system dlct. Multidetector helical ct is the technology of choice for image acquisition in arterial crosssectional imaging. Recent advances in computed tomography ct technology, particularly that of multiple detector ct mdct scanning, have provided increased utilization and more diverse clinical applications including more advanced vascular and cardiac exams, perfusion imaging, and screening exams. Excellent depiction of crisoid aneurysm with multi detector computed tomography. Compared to singledetector helical ct, this technique offers three significant advantages. The use of multiple detector rows allows faster scanning and thinner collimation.
The introduction of multidetector computed tomography mdct is considered a dramatic development in ct imaging that has direct implication in the imaging of various systems, in particular the cardiovascular system. Noncontrast cardiac electron beam or multiple detector computed tomography ebct, mdct is considered the reference method for calculation of cac score cacs. A comprehensive database of more than 35 computed tomography quizzes online, test your knowledge with computed tomography quiz questions. Nov 10, 2010 over the past decade, multiple detector computed tomography mdct scanners have transformed the imaging field. Summary the availability of new detector array technology allowing multislice ct acquisitions has enabled new applications for ct. Previously, gasfilled detectors were used, but now, all are scintillation, solid state detectors. Definition of multidetector computed tomography medicinenet.
Crosssectional imaging has become a critical aspect in the evaluation of arterial injuries. Systems such as the toshiba aquilion 64 provide physicians and patients with many diagnostic benefits, since they are a faster, less invasive modality for diagnosing various conditions. Computed tomography dose index ctdi in ct the dose is uniformly distributed across the scanning plane as the pt is equally irradiated standard measure of ct radiation dose that enables easy intercomparison of output between different scanners ctdi integrates radiation dose delivered both within and beyond the scan volume. The xray sources are operated to produce xray spectra of different energies peak kilovoltage kvp andor filtration. Sun x 1, shen w 2, chen x 1, wen t1, duan y1, wang r 1. The technology of computed tomography ct imaging has soared over the last decade with the use of multidetector ct mdct scanners that are capable of performing studies in a matter of seconds. Multidetector ct lowers costs, reduces invasive procedures. A quadruple multicamera neutron computed tomography. Images with high temporal and spatial resolution can be obtained with multiplerow detector ct scanners.
The introduction of singledetector helical computed tomography sdct in 1989 was the first step in a transition from viewing ct as a series of sequential axial sections to perceiving each examination as a volumetric acquisition of anatomic. Multidetector computed tomography mdct is a form of computed tomography. Computed tomography ct technology has changed considerably in recent years with the introduction of increasing numbers of multiple detector arrays. There is a separate table, on which the patient lies, that can move smoothly in and out of the gantry. Cardiac imaging with multiplerow detector computed tomography ct has become possible due to rapid advances in ct technologies. Multiple detector computed tomography after direct lymphangiography provides a safe and accurate examination method and is an excellent tool for the diagnosis of pil. Multiple detector computed tomography mdct the imaging. Jcm free fulltext the anatomy of the tibial nutrient. E detector array multislice helical ct imaging systems have multiple detectors in an array up to tens of thousands.
In this mdct approach, a twodimensional 2d array of detector elements replaces the linear array of detector elements used in the typical conventional and helical ct scanners. Using xray computed tomography for dimensional metrology. Multidetector computed tomography mdct is a form of ct technology used for diagnostic imaging fig. The introduction of singledetector helical computed tomography sdct in 1989 was the first step in a transition from viewing ct as a series of sequential axial sections to perceiving each examination as a volumetric acquisition of anatomic data. Computed tomography ct donut shaped machine uses xray energy and computer generation of images advantages sensitive to slight density difference cross sectional anatomy attenuation. Modern generations of ct scanners employ multiple rows of detector arrays allowing rapid scanning and wider scan coverage. Images with high temporal and spatial resolution can be obtained with multiple row detector ct scanners. Ctpet is more accurate than multidetector ct in the detection of malignancy in solitary pulmonary nodules. Organ dose measurements from multipledetector computed.
The number of simultaneous but independent measurements along the patient long axis is often referred to as the number of. Multidetector computed tomography ct jay vaishnav, ph. Photoncounting computed tomography ct is a computed tomography technique currently under research and development, both within academia and by major vendors of ct systems. The anatomy of the tibial nutrient artery canalan investigation of 106 patients using multidetector computed tomography by haidara almansour 1, eleftherios armoutsis 1, marie k. Computed tomography ct, sometimes called computerized tomography or computed axial tomography cat, is a noninvasive medical examination or procedure that uses specialized x. Saxena, guruprasadh chandrashekhar, anmol bhatia, sunit singhi, 1 ritesh agarwal, 2 and niranjan khandelwal. Multidetector computed tomography mdct is a form of computed tomography ct technology for diagnostic imaging. Cardiac imaging with multiple row detector computed tomography ct has become possible due to rapid advances in ct technologies. Most neutron imaging systems can accommodate large samples, but recent interest is more focused on small cmsized samples. Excellent depiction of crisoid aneurysm with multidetector.
Managing patient dose in multidetector computed tomography. Sun x1, shen w2, chen x1, wen t1, duan y1, wang r1. Physics of cardiac imaging with multiplerow detector ct. Medical definition of multidetector computed tomography. Coronary artery calcium detection using flat panel digital. Computer simulations to estimate organ doses from clinically. Multiple detector computed tomography findings after direct lymphangiography. In mdct, a twodimensional array of detector elements replaces the linear array of detector elements used in typical conventional and helical ct scanners. Excellent depiction of crisoid aneurysm with multidetector computed tomography. Multidetector row ct mdct is the latest advancement in ct technology. A comprehensive search for articles from jan 1, 1980 to dec 31, 20 was conducted through pubmed, cochrane library database, china biology medical literature database, web of knowledge, proquest, ebsco, ovidsp, and clinicaltrials. However, the fact that every point in the domain can send a signal to any detector pixel leads to algorithms that scale substantially worse than projective tomography 16. Our online computed tomography trivia quizzes can be adapted to suit your requirements for taking some of the top computed tomography quizzes.
Our online computed tomography trivia quizzes can be adapted to suit your requirements for taking some of. It uses a combination of xrays and a computer to create pictures of your organs, bones, and other tissues. In particular, angiography using computed tomography ct is the imaging of choice. Xray computed tomography ct has successfully entered the field of coordinate metrology as an innovative and flexible noncontact measurement technology for performing dimensional measurements on industrial parts.
A variety of techniques and options are available when evaluating for arterial injuries. Photoncounting ct has the potential both to offer significant improvements to existing ct imaging techniques and to make possible completely novel applications. Multidetector computed tomography pulmonology advisor. Computed tomography pulmonary angiograms using a novel dual. Multi detector computed tomography, build unlimited knowledege. Advances in multiplerow detector computed tomography ct technology have made it feasible for imaging the heart and to evaluate chd noninvasively. Our team is rapidly changing the way we look at radiology through our research and development team your ideas becomes tomorrows innovation. Multiple detector computed tomography or mdct scanning is a rapid, painless diagnostic procedure that combines the use of computers and xrays. Original article by journal of evolution of medical and dental sciences. Multidetector computed tomography imaging techniques in. The purpose of this metaanalysis was to explore the value of wholebody computed tomography wbct in major trauma patients mtps.
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