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. Multidetector row ct mdct is the latest advancement in ct technology. Summary the availability of new detector array technology allowing multislice ct acquisitions has enabled new applications for ct. Coronary artery calcium detection using flat panel digital. Health, general aneurysm aneurysms cat scans ct imaging detection equipment detectors. Computed tomography ct, sometimes called computerized tomography or computed axial tomography cat, is a noninvasive medical examination or procedure that uses specialized xray equipment. Sun x1, shen w2, chen x1, wen t1, duan y1, wang r1. 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. Computed tomography ct donut shaped machine uses xray energy and computer generation of images advantages sensitive to slight density difference cross sectional anatomy attenuation. Images with high temporal and spatial resolution can be obtained with multiplerow detector ct scanners.
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. Our team is rapidly changing the way we look at radiology through our research and development team your ideas becomes tomorrows innovation. Abstractcomputed tomography ct technology has changed considerably in recent years with the introduction of increasing numbers of multiple detector arrays. Multi detector computed tomography, build unlimited knowledege. Calcium scoring, ct angiography, and assessment of ventricular function can be performed with multiplerow detector ct,2. The number of simultaneous but independent measurements along the patient long axis is often referred to as the number of. Using xray computed tomography for dimensional metrology. Multidetector computed tomographic angiography of the. A ct scan, or computed tomography scan is a medical imaging procedure that uses computerprocessed combinations of many xray measurements taken from different angles to produce crosssectional tomographic images virtual slices of specific areas of a scanned object, allowing the user to see inside the object without cutting.
Rapid assessment of multiple organ systems has made ct popular among radiologists and clinicians alike. Multidetector computed tomography imaging techniques in. Sun x 1, shen w 2, chen x 1, wen t1, duan y1, wang r 1. Excellent depiction of crisoid aneurysm with multidetector computed tomography. Multiple images are acquired in a sequence by a rotating xray tube. Anastasio4 1 department of electrical and computer. 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. Comparison of wholebody computed tomography vs selective.
Most neutron imaging systems can accommodate large samples, but recent interest is more focused on small cmsized samples. Multidetector computed tomography pulmonology advisor. Cardiac imaging with multiplerow detector computed tomography ct has become possible due to rapid advances in ct technologies. E detector array multislice helical ct imaging systems have multiple detectors in an array up to tens of thousands. Compared to singledetector helical ct, this technique offers three significant advantages. There are several parameters specific to multidetector computed tomography mdct scanners that increase or decrease patient dose systematically compared to older single detector. Multidetector computed tomography an overview sciencedirect. The twodimensional detector array permits ct scanners to acquire multiple. 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. Cardiac imaging with multiple row detector computed tomography ct has become possible due to rapid advances in ct technologies.
In mdct, a twodimensional array of detector elements replaces the linear array of detector elements used in typical conventional and helical ct scanners. Multidetector computed tomography mdct is a form of ct technology used for diagnostic imaging fig. Computed tomography ct, sometimes called computerized tomography or computed axial tomography cat, is a noninvasive medical examination or procedure that uses specialized x. Vascular air embolism after contrast administration on 64 row. Ctpet is more accurate than multidetector ct in the detection of malignancy in solitary pulmonary nodules. Crosssectional imaging has become a critical aspect in the evaluation of arterial injuries. With a small field of view for a camerabased detection system, the neutron flux per pixel decreases, and measurement time increases. 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. Notwithstanding the benefits to the patient undergoing a ct study, the fundamental concern in radiation protection. The xray sources are operated to produce xray spectra of different energies peak kilovoltage kvp andor filtration. Managing patient dose in multidetector computed tomography. Definition of multidetector computed tomography medicinenet. Vascular air embolism after contrast administration on 64 row multiple detector computed tomography. Jul 26, 2012 radiographically detectable coronary artery calcium cac is a well recognized marker of subclinical coronary heart disease.
Nov 10, 2010 over the past decade, multiple detector computed tomography mdct scanners have transformed the imaging field. 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. Advances in multiplerow detector computed tomography ct technology have made it feasible for imaging the heart and to evaluate chd noninvasively. Fundamentals of single and multiple row detector computed. Managing patient dose in multidetector computed tomographymdct.
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. Wernick 1,4, dean chapman2, zhong zhong3, carol muehleman5, jun li5, mark a. Our online computed tomography trivia quizzes can be adapted to suit your requirements for taking some of the top computed tomography quizzes. The use of multiple detector rows allows faster scanning and thinner collimation. Over the last few decades, the rapid development of cardiac computed tomography ct has been unequalled by any other imaging technique.
It is possible to treat the problem of diffusion tomography, as occurs, e. A computed tomography ct or cat scan allows doctors to see inside your body. Photoncounting ct has the potential both to offer significant improvements to existing ct imaging techniques and to make possible completely novel applications. Organ dose measurements from multipledetector computed. Multiple detector computed tomography or mdct scanning is a rapid, painless diagnostic procedure that combines the use of computers and xrays. 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. It uses a combination of xrays and a computer to create pictures of your organs, bones, and other tissues. Over the past decade, multipledetector computed tomography mdct scanners have transformed the imaging field. The purpose of this metaanalysis was to explore the value of wholebody computed tomography wbct in major trauma patients mtps. Excellent depiction of crisoid aneurysm with multi detector computed tomography. Our online computed tomography trivia quizzes can be adapted to suit your requirements for taking some of. Multiple detector computed tomography mdct the imaging. A quadruple multicamera neutron computed tomography. Multidetector computed tomography mdct is a form of computed tomography ct technology for diagnostic imaging.
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 technology has changed considerably in recent years with the introduction of increasing numbers of multiple detector arrays. Saxena, guruprasadh chandrashekhar, anmol bhatia, sunit singhi, 1 ritesh agarwal, 2 and niranjan khandelwal. Jcm free fulltext the anatomy of the tibial nutrient. There is a separate table, on which the patient lies, that can move smoothly in and out of the gantry. 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 ct lowers costs, reduces invasive procedures. A comprehensive database of more than 35 computed tomography quizzes online, test your knowledge with computed tomography quiz questions. Modern generations of ct scanners employ multiple rows of detector arrays allowing rapid scanning and wider scan coverage. Multidetector helical ct is the technology of choice for image acquisition in arterial crosssectional imaging. Radiographically detectable coronary artery calcium cac is a well recognized marker of subclinical coronary heart disease. A variety of techniques and options are available when evaluating for arterial injuries. Noncontrast cardiac electron beam or multiple detector computed tomography ebct, mdct is considered the reference method for calculation of cac score cacs. Multiple detector computed tomography after direct lymphangiography provides a safe and accurate examination method and is an excellent tool for. 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. Abstract computed tomography ct technology has changed considerably in recent years with the introduction of increasing numbers of multiple detector arrays. Background computed tomography ct technology and its clinical applications have shown enormous. Images with high temporal and spatial resolution can be obtained with multiple row detector ct scanners. While the diagnostic information obtained from mdct imaging is extremely valuable, it is important to ensure that the radiation doses resulting from.
Computed tomography pulmonary angiograms using a novel dual. Photoncounting computed tomography ct is a computed tomography technique currently under research and development, both within academia and by major vendors of ct systems. Multidetector computed tomography ct jay vaishnav, ph. Systems such as the toshiba aquilion 64 provide physicians and patients with many diagnostic benefits, since they are a faster, less. Computed tomography ct computed tomography ct involves using an xray tube coupled to a detector system, encased within a doughnut shaped gantry. A mdct scan allows the radiologist to see the location, or abnormalities. All new ct systems are mdct, and a number of new dose reduction tools have become available commercially. Previously, gasfilled detectors were used, but now, all are scintillation, solid state detectors.
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. Physics of cardiac imaging with multiplerow detector ct. Computer simulations to estimate organ doses from clinically. Techniques involve contrast bolus, various phases of contrast enhancement, multiplanar reconstruction, volume rendering, and. Medical definition of multidetector computed tomography. Reumann 2, konstantin nikolaou 1,3 and fabian springer 1,3. Learn vocabulary, terms, and more with flashcards, games, and other study tools.
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. In particular, angiography using computed tomography ct is the imaging of choice. Multiple detector computed tomography after direct lymphangiography provides a safe and accurate examination method and is an excellent tool for the diagnosis of pil. 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.
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