mri…

Medical experts recommend this detailed explanation.

[ Find Organization | Index Page ]

what the risks are --> mri scans, magnetic resonance imaging, nuclear magnetic resonance, nmr, imaging, mri, non-invasive procedure, uses powerful magnets, radio waves to construct pictures, unlike conventional radiography, computed tomographic, ct, imaging, make use of potentially harmful radiation, x-rays, mri imaging, the magnetic properties of atoms, a powerful magnet generates a magnetic field roughly 10,000 times stronger than the natural background magnetism, earth, a very small percentage of hydrogen atoms, a human body, align, field, focused radio wave pulses, broadcast towards the aligned hydrogen atoms in tissues of interest, return a signal, subtle differences in that signal from various body tissues enables mri to differentiate organs, potentially contrast benign, malignant tissue, imaging plane, slice, projected, stored, computer, printed on film, mri, clothing, bones, certain types of metal, in the area of interest, cause significant errors, artifacts, reconstructed images, mri makes use of radio waves very close in frequency to those of ordinary fm radio stations, scanner must be located, a specially shielded room to avoid outside interference, lie on a narrow table which slides into a large tunnel-like tube, the scanner, small devices placed around the head, arm, leg, adjacent to other areas to be studied, special body coils which send, receive the radio wave pulses, designed to improve the quality, the images, contrast, administered, an iv, small vein, the hand, forearm, a technologist, operate the machine, observe, entire study, adjacent room, several sets of images, each taking from 2 to 15 minutes, a complete scan, depending on the organs studied, sequences performed, contrast enhancement, take up to one hour, newer scanners, more powerful magnets utilizing updated software, advanced sequences, complete the process in less time, no preparatory tests, diets, medications, an mri, performed immediately after other imaging studies, depending on the area of interest, patient asked, fast, 6 hours, scan, the strong magnets, certain metallic objects, not allowed, room, items jewelry, watches, credit cards, hearing aids, pins, hairpins, metal zippers, similar metallic items, distort the images, removable dental work, taken out, scan, pens, pocketknives, eyeglasses, become dangerous projectiles, the magnet is activated, should not accompany the patient, scanner area, the strong magnetic fields, displace, disrupt the action of implanted metallic objects, cardiac pacemakers cannot be scanned, should not enter the mri area, mri also should not be used, metallic objects in bodies, inner ear, cochlear, implants, brain aneurysm clips, artificial heart valves, older vascular stents, placed artificial joints, sheet metal workers, persons, similar potential exposure to small metal fragments, first be screened, metal shards, the eyes, x-rays, the skull, sign a consent form confirming that none, above issues apply, the study, a hospital gown recommended, patient allowed to wear a sweatsuit, similar clothing, metal fasteners, no pain, magnetic field, radio waves, not felt, primary possible discomfort, claustrophobic feeling that some experience from inside the scanner, table hard, cold, request a blanket, pillow, machine produces loud thumping, humming noises, normal operation, ear plugs, patient to reduce the noise, a technologist observes the patient, entire procedure, spoken to, an intercom, in the scanner, mri scanners, equipped, televisions, special headphones to help the examination time pass, excessive movement, blur mri images, certain artifacts, patient has difficulty lying still, very anxious, an oral, intravenous sedative given, no recovery time, sedation was necessary, after an mri scan, resume normal diet, medications, an mri, provide additional imaging information, the clinician based upon its superior tissue contrast resolution, combined, imaging methods, a more definitive diagnosis, in the work up of a patient's disease, sequences performed, intravenous contrast, provide additional data, the blood vessels, masses, an mra, magnetic resonance angiogram, special type of mr that creates three-dimensional reconstructions of vessels containing flowing blood, utilized, conventional angiography cannot be performed, due to renal failure, contraindications, no ionizing radiation involved in mri, have been no documented significant side effects, the magnetic fields, radio waves used on the human body to date, most common intravenous contrast agent, gadolinium, very safe, there have been documented allergic reactions to it, extremely rare, sedation is used, associated risks of over-sedation, technologist monitors the patient's vital signs, heart rate, respiration, mri, not recommended, acute trauma situations, traction, life-support equipment cannot safely enter the scanner area, scan times, relatively lengthy, people have been harmed in mri machines, did not remove metal objects from clothes, metal objects were left, in the room by others, specific information, why the test is performed, abnormal results, specific mri topics, chest mri, abdominal mri, heart mri, cranial mri, lumbosacral spine mri, spine mri.