chest mri…

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what the risks are mri scans, vertebra, thoracic, mid back, nuclear magnetic resonance, chest, magnetic resonance imaging, chest, nmr, chest, mri, the thorax, a chest mri uses powerful magnets, radio waves to construct pictures, unlike conventional radiography, computed tomographic, ct, imaging, make use of potentially harmful radiation, x-rays, passes, a patient to generate images, magnetic resonance imaging, mri, the magnetic properties of atoms, a powerful magnet generates a magnetic field roughly 10,000 times stronger than the earth's, a very small percentage of hydrogen atoms, align, field, radio wave pulses, broadcast towards the aligned hydrogen atoms in tissues of interest, returning a signal of own, subtle differing characteristics of that signal from different tissues enables mri to differentiate between various organs, potentially, provide contrast between benign, malignant tissue, imaging plane, "slice", projected, stored, computer, printed on film, mri, clothing, bones, certain types of metal in, around the area of interest, cause significant errors, in the 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 that slides into a large, tunnel-like tube, the scanner, contrast dye is used, injected into a 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, depending on the sequences performed, possibility, the need, contrast enhancement, a complete scan, take up to a hour, newer scanners, more powerful magnets, updated software, advanced sequences, complete the process in less time, no preparatory tests, diets, medications, an mri performed immediately after other imaging studies, 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, 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, infants, children, test depends on child's age, level of trust, prepare child, infant test, procedure preparation, birth to 1 year, toddler test, procedure preparation, 1 to 3 years, preschooler test, procedure preparation, 3 to 6 years, schoolage test, procedure preparation, 6 to 12 years, adolescent test, procedure preparation, 12 to 18 years, no pain, magnetic field, radio waves, not felt, experience a claustrophobic feeling 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, errors, in the image, patient has difficulty lying still, very anxious, an oral, intravenous sedative given, no recovery, sedation was necessary, after an mri scan, resume normal diet, medications, an mri provides detailed pictures of tissues, the chest cavity, obstruction by overlying bone, clarify findings from previous x-rays, ct scans, structures, the chest from multiple planes, help diagnose abnormal growths, provide information, the staging, extent, spread, tumors, in the chest cavity, mri, distinguish tumors, lesions from normal tissues, lymph nodes, blood vessels, evaluate blood flow, avoid the dangers of angiography, repeated exposure to radiation, a normal mri would not show any abnormalities, in the size, position of organs, in the chest cavity, viewed from any plane, mri would not reveal any new growths, lesions, organs would, functioning, organs where mri, indicate function, sensitivity of mri depends, in part, on the experience, the radiologist, a chest mri, reveal disorders, thymus tumor, lung masses, esophageal mass, masses, aggregations of cells, tumors, the chest, abnormal lymph nodes, swollen glands, enlarged lymph nodes in any location, the chest, staging of tumors, invasion of blood vessels, alveolar bullae, copd, bronchial abnormalities, bronchiectasis, cystic lung lesions, pleural abnormalities, thickening, pleural effusion, abnormal pulmonary vessels, coarctation, the aorta, aortic stenosis, aortic dissection, pericardial effusion, thoracic aortic aneurysm, additional conditions under which the test performed, atrial myxoma, right, atrial septal defect, cardiac tamponade, ischemic cardiomyopathy, mitral regurgitation, acute, mitral regurgitation, chronic, mitral valve prolapse, pericarditis, bacterial, pericarditis, constrictive, pericarditis, post-mi, pulmonary edema, restrictive cardiomyopathy, skin lesion of histoplasmosis, svc obstruction, 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, the effects of strong magnetic fields on a fetus, not well documented at this time, pregnant women, advised to avoid mri scans, most common mr intravenous contrast agent, gadolinium, very safe, there have been documented allergic reactions to it, an extremely rare occurrence, sedation is used, associated risks of over-sedation, technologist monitors the patient's vital signs, heart rate, respiration, people have been harmed in mri machines, did not remove metal objects from clothes, metal objects were left, in the room by others, mri is more accurate than ct scan, tests, certain conditions, less accurate, disadvantages include the high cost, long duration, the scan, sensitivity to movement, claustrophobia, confused, anxious, have difficulty lying still, the relatively long scan times, mri is not portable, incompatible, metallic implants, life support-devices, traction apparatus, similar equipment, mri, superior technique in most cases where differentiation of soft tissues, organs, obstruction by bone, foreign bodies, capable of showing the tissues from multiple viewpoints, noninvasive way to evaluate blood flow, currently, mri is not valuable, in the evaluation of subtle changes, the lung tissue, the lungs contain mostly air, difficult to image.