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| | Functional magnetic resonance imaging - Wikipedia, the free encyclopedia |
 | | Functional magnetic resonance imaging (fMRI) is the use of MRI to measure the haemodynamic response related to neural activity in the brain or spinal cord of humans or other animals. | | | Ultimately, the goal of all functional imaging experiments is to explain human cognition and behavior in terms of physical (anatomical) mechanisms. | | | Magnetic resonance spectroscopic imaging (MRS) is another, NMR-based process for assessing function within the living brain. |
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http://en.wikipedia.org/wiki/Functional_magnetic_resonance_imaging
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| | Magnetic Resonance Imaging |
| | MR imaging of the postoperative lumbar spine: Assessment with gadopentetate dimeglumine. | | | Magnetic resonance imaging is also the optimal examination to detect primary and metastatic neoplasms in the spinal column, spinal cord, or paravertebral soft tissues. | | | Magnetic resonance imaging, therefore, leaves considerable importance to such information as may be gained from other tests and, most especially, to the judgment of the treating physician. |
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http://www.simmonsortho.com/literature/Magnetic_Resonance_Imaging/magnetic_resonance_imaging.html
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| | Magnetic resonance imaging - Wikipedia, the free encyclopedia |
| | This is done to avoid the negative connotations of the word nuclear, and to prevent patients from associating the examination with radiation exposure, which is not one of the safety concerns for MRI. | | | Because of MRI's superior imaging of soft tissues, it is now being utilized to specifically locate tumors within the body in preparation for radiation therapy treatments. | | | Interaction of the magnetic and radiofrequency fields with such objects can lead to: trauma due to movement of the object in the magnetic field, thermal injury from radiofrequency induction heating of the object, or failure of an implanted device. |
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http://en.wikipedia.org/wiki/Magnetic_Resonance_Imaging
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| | Magnetic resonance imaging |
| | MRI is particularly useful for imaging the brain and spine, as well as the soft tissues of joints and the interior structure of bones. | | | By using strong magnets and pulses of radio waves to manipulate the natural magnetic properties in the body, this technique makes better images of organs and soft tissues than those of other scanning technologies. | | | The progress of some therapies, like liver cancer therapy, needs to be monitored, and the effect of repeated x-ray exposure is a concern. |
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http://www.healthatoz.com/healthatoz/Atoz/ency/magnetic_resonance_imaging.jsp
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| | LOCALIZATION OF BRAIN FUNCTION WITH MAGNETIC RESONANCE IMAGING |
| | High resolution structural data collected by magnetic resonance imaging (MRI) has an established place in the neurosciences; the presence and localization of lesions correlated with, for example, behavioral or cognitive deficits, suggest structural-functional relationships in cognitive skills. | | | A confluence of MRI developments, particularly those involving ultra-fast imaging, have resulted recently in techniques by which activity in the human brain can be observed non-invasively with spatial resolution of a few millimeters and temporal resolution of less than a second. | | | It is this latter result that has revolutionized the field of functional MR imaging, forming the basis for practical, non-invasive observation of the hemodynamic changes accompanying neuronal activity. |
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http://airto.bmap.ucla.edu/BMCweb/SharedCode/TINS/FMRI-TINS.html
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| | MRI: Viewing the body's hidden structure - MayoClinic.com |
| | Magnetic resonance imaging (MRI) is a technique that uses a magnetic field and radio waves to create cross-sectional images of your head and body. | | | After several minutes of imaging you may become relaxed and have few problems lying still for the duration of the exam. | | | Metal objects may interfere with the magnetic field used during the exam, affecting the quality of the MRI images. |
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http://www.mayoclinic.com/health/mri/SM00035
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| | eMedicine - Magnetic Resonance Imaging in Acute Stroke : Article by Souvik Sen, MD |
| | The imaging is based on the monitoring of a nondiffusible contrast material (gadolinium) passing through brain tissue. | | | One limitation of these techniques is in detection of acute intracerebral hemorrhages; early studies demonstrated that susceptibility imaging could be sensitive in the detection of acute intracerebral hemorrhage. | | | Rincon F: Anticoagulation and thrombolysis for acute ischemic stroke and the role of diagnostic magnetic resonance imaging. |
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http://www.emedicine.com/neuro/topic431.htm
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| | Principles of Magnetic Resonance Imaging |
| | When imaging anatomy, some degree of control of the contrast of different organs or parts of organs is possible by varying TR and TE. | | | The theoretical limit of the precision of measurements obtained from medical images is determined by the point spread function of the imaging device (Rossmann (1969) and Robson et al. | | | T2 relaxation (also known as T2 decay, transverse relaxation or spin-spin relaxation) is the decrease in the x-y component of magnetisation. |
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http://www.easymeasure.co.uk/principlesmri.aspx
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| | BTR Directory - Magnetic Resonance Imaging |
| | Diffusion and perfusion imaging methods: Improved techniques for visualizing and mapping tissue microvasculature, including diffusion tensor, exogenous and endogenous tracer perfusion, and arterial spin-tagging techniques. | | | Facilities and expertise for generating hyperpolarized helium and xenon gases, specialized coil design, and construction are available, as are body positioning devices for specific experiments (i.e., in-magnet exercise; heart, brain, and liver studies). | | | Cardiovascular structure and function: Techniques for visualizing cardiac and vascular anatomy and for quantitating blood flow and hemodynamics. |
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http://www.ncrr.nih.gov/ncrrprog/btdir/MRI.asp
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| | Neuroguide.com - Functional Magnetic Resonance Imaging |
| | The principle of fMRI imaging is to take a series of images of the brain in quick succession and to statistically analyze the images for differences among them. | | | This method can also be used to study the physiology of other organs-- for example, studying blood flow to pathological organs, thus helping us to understand the disease process. | | | When hydrogen nuclei relax, the frequency that they transmit is positively correlated with the strength of the magnetic field surrounding them. |
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http://www.neuroguide.com/gregg.html
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| | Magnetic Resonance Imaging (MRI) |
| | MRI of the chest may also be used to look for breast or lung cancer. | | | In some cases, a contrast material may be used during the MRI to show pictures of organs or structures more clearly. | | | For more information, see the medical tests MRI of the Head, MRI of the Abdomen, MRI of the Breast, MRI of the Spine, MRI of the Shoulder, and MRI of the Knee. |
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http://www.webmd.com/hw/health_guide_atoz/hw214278.asp
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| | Nat' Academies Press, Mathematics and Physics of Emerging Biomedical Imaging (1996) |
| | Resolution, expressed as the reciprocal of imaging voxel volume, achieved in MR brain images by means of a volume head coil in scan times of less than 20 minutes and SNR sufficient to delineate anatomic structures. | | | A pulsed field is applied and left on for a time comparable to the relaxation time T 1, to polarize the magnetic spins. | | | Postprocessing, such as realignment of images to compensate for rigid body motions, is becoming more practical as readily available computing power increases. |
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http://www.nap.edu/books/0309053870/html/37.html
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| | Magnetic Resonance Imaging |
| | To get the best possible picture, it is important to relax and remain still during the test. | | | Depending on the part of the body being examined, the test usually takes between 30-60 minutes. | | | This design also accommodates patients weighing up to 400 lbs. |
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http://www.amic-chicago.com/ser_mri.html
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| | Magnetic Resonance Imaging |
| | Case studies of spinal and pelvic floor imaging are presented, demonstrating the use of the technology. | | | MRI Education is a Web site for practitioners wishing to further their knowledge in the field of magnetic resonance imaging. | | | As part of his research project, this educational resource, aimed at medical and other bioscience students, focuses on medical imaging techniques (MRI and CT scanning). |
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http://omni.ac.uk/browse/mesh/D008279.html
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| | Functional Magnetic Resonance Imaging - Sinauer Associates, Inc. |
| | … Functional Magnetic Resonance Imaging [offers] a clear, cogent, and thorough introduction to the technique of fMRI, which has been sorely needed as its use has become more commonplace in psychology and neuroscience programs…. | | | The authors succeed in producing a text for beginning researchers, as well as undergraduate and graduate students studying cognitive neuroscience who want to understand and interpret that imaging literature…. | | | Residents and clinicians in neurology, neurosurgery, neuropsychology, and psychiatry, as well as rehabilitation therapists aiming for research careers, will find this to be an easy-to-read yet informative 1-stop source for an in-depth overview of functional neuroimaging.” |
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http://www.sinauer.com/detail.php?id=2887
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| | Magnetic resonance imaging Health Guide - Health Guides Online |
| | Assessment and staging of bone and soft tissue tumours are accurate with MRI. | | | Magnetic resonance imaging Health Guide - Health Guides Online | | | Magnetic Resonance Angiography (MRA) is a technique used to evaluate flow and stenotic change in vessels non-invasively. |
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http://www.healthguidesonline.com/Magnetic_resonance_imaging.html
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| | Magnetic Resonance Imaging |
| | Laser polarized ^129Xe has been used as a magnetic tracer of blood flow and for in vivo NMR imaging in rat brain. | | | NMR spectra of laser-polarized ^129Xe in the entire rat body (A) and in the head (B). | | | We conclude that by increasing the volume and absolute polarization of the ^129Xe, it will be possible to apply this technique to human brain activation studies based on quantitative measurement of regional cerebral blood flow. |
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http://www.umich.edu/~amophys/mri2.html
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| | Magnetic Resonance Imaging |
| | This non-invasive technique relies on the magnetic properties of atoms, rather than radiation that is used in many other imaging procedures. | | | Michener's MRI graduates acquire the basic knowledge to practise the most advanced MR techniques such as functional and cardiac MRI and have plenty of opportunities to participate in exciting new research projects. | | | MRI Technologists utilize their knowledge of anatomy, physiology, patient care and the principles of MRI to safely and efficiently operate advanced MRI scanners and assist in the diagnosis of disease and injury. |
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http://www.michener.ca/ce/postdiploma/mri.php
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| | magnetic resonance imaging on Encyclopedia.com |
| | Magnetic resonance imaging in low back pain: general principles and clinical issues. | | | MAGNETIC RESONANCE IMAGING [magnetic resonance imaging] (MRI), noninvasive diagnostic technique that uses nuclear magnetic resonance to produce cross-sectional images of organs and other internal body structures. | | | Magnetic resonance imaging marketing and investment: tensions between the forces of business and the practice of medicine. |
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http://www.encyclopedia.com/html/m1/magresim.asp
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| | Magnetic Resonance Imaging |
| | Magnetic Resonance Imaging does not use X-Rays (nor any other type of "ionizing" radiation). | | | First, the magnetic field causes the protons in the atoms of water within the patient to all "line-up". | | | Instead, it is a technique that combines a large magnetic field and some radio frequency antennas ("coils"). |
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http://rad.usuhs.mil/rad/home/mri.html
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| | Magnetic Resonance Imaging |
| | The schematic below may help visualize the imaging process. | | | The frequency of this proton "signal" is proportional to the magnetic field to which they are subjected during this relaxation process. | | | Many of those protons are the protons in water, so MRI is particularly well suited for the imaging of soft tissue, like the brain, eyes, and other soft tissue structures in the head as shown at left. |
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http://hyperphysics.phy-astr.gsu.edu/hbase/nuclear/mri.html
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| | GE Healthcare-Product Features -Magnetic Resonance Imaging |
| | With high definition imaging and motion correction technology you can view all your patients exactly how you want. | | | Optimize the clinical use of your GE 3.0T! | | | Once they were considered hard to scan patients. |
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http://www.gehealthcare.com/usen/mr
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| | Magnetic Resonance Imaging - MSN Encarta |
| | Once the patient is placed in the cylindrical magnet, the diagnostic process follows three basic steps. | | | MRI is possible in the human body because the body is filled with small biological “magnets,” the most abundant and responsive of which is the proton, the nucleus of the hydrogen atom. | | | Then MRI stimulates the body with radio waves to change the steady-state orientation of protons. |
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http://encarta.msn.com/encyclopedia_761579758/Magnetic_Resonance_Imaging.html
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| | MedlinePlus Medical Encyclopedia: MRI |
| | Combined with other imaging methods, a more definitive diagnosis can be given in the work up of a patient's disease. | | | MRI also should not be used for people with metallic objects in their bodies, such as: | | | The subtle differences in that signal from various body tissues enables MRI to differentiate organs, and potentially contrast benign and malignant tissue. |
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http://www.nlm.nih.gov/medlineplus/ency/article/003335.htm
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| | Magnetic resonance imaging definition - Cancer information on MedicineNet.com |
| | Magnetic resonance imaging: A special radiology technique designed to image internal structures of the body using magnetism, radio waves, and a computer to produce the images of body structures. | | | Imaging would then be like sitting in a concert hall listening to the symphony, and not only hearing but also seeing the instruments, how they play and where they are located, like organs in the human body. | | | The patient is placed on a moveable bed that is inserted into the magnet. |
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http://www.medterms.com/script/main/art.asp?articlekey=11609
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| | Elsevier Author Gateway |
| | MAGNETIC RESONANCE IMAGING (MRI) is the first international multidisciplinary journal encompassing physical, life, and clinical science investigations as they relate to the development and use of magnetic resonance imaging. | | | MRI is dedicated to both basic research and medical applications, providing a single forum for communication among radiologists, physicists, chemists, biochemists, biologists, engineers, internists, pathologists, physiologists, computer scientists, and mathematicians. | | | Magnetic Resonance Imaging is ranked 42nd out of 83 Radiology, Nuclear Medicine and Medical Imaging title on the 2003 ISI Journal Citation Reports. |
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http://authors.elsevier.com/JournalDetail.html?PubID=525478&Precis=DESC
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| | Neuroscience for Kids - Imaging |
| | PET alone is also used to study different cognitive functions. | | | Basics of Brain Imaging - from the National Institute on Drug Abuse | | | Brain imaging demonstrations - from the Montreal Neurological Institute |
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http://staff.washington.edu/chudler/image.html
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| | Topics in Magnetic Resonance Imaging |
| | Magnetic Resonance Imaging of the Brain and Spine, Book, Hardbound | | | Magnetic Resonance Imaging in Orthopaedics & Sports Medicine, Book, Hardbound | | | Topics in Magnetic Resonance Imaging (TMRI) is a leading information resource for professionals in the MRI community. |
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http://lww.com/store/products?0899-3459
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| | Magnetic Resonance Imaging - Summary |
| | Slurred speech or partial paralysis may signal only a seizure or migraine but can also be symptoms of stroke. | | | The following article describes the often winding road that over the last 70 years has led from the work of scientists simply investigating the nature of matter to applications that would ultimately save many lives. | | | Neuroscience for Kids - This site from the University of Washington offers simple explanations of some of the different kinds of imaging. |
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http://www.beyonddiscovery.org/content/view.article.asp?a=129
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| | Magnetic Resonance Imaging |
| | In addition, many States have now mandated that free-standing imaging centers have a qualified medical physicist review image quality on an ongoing basis. | | | In keeping with these recent demands for quality imaging, the company has a strong medical physics program specifically designed to meet ACR and State requirements for this imaging modality. | | | The American College of Radiology (ACR) has established Quality Control measures for MRI units throughout the United States. |
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http://www.ampr.net/serv04.htm
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| | Philips, Magnetic Resonance Imaging - SmartExam: The First MR with IQ |
| | Excerpts from the SmartExam review in the March issue of Diagnostic Imaging magazine: | | | SmartExam: The First MR with IQ Fully Automated Planning, Scanning and Processing with a single mouse click | | | Philips, Magnetic Resonance Imaging - SmartExam: The First MR with IQ Find a product |
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http://www.medical.philips.com/main/products/mri
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| | Quinte MRI - Magnetic Resonance Imaging |
| | Quinte Magnetic Resonance Imaging (MRI) provides state-of-the-art medical diagnostic equipment, quality support, service and training to the global market. | | | Design and Implementation by Etherlinx e-Business Solutions Inc. |
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http://www.quintemri.on.ca
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