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