lumbosacral spine mri…

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what the risks are --> mri scans, lumbar vertebrae, nmr, lumbosacral spine, magnetic resonance imaging, lumbosacral spine, nuclear magnetic resonance, lumbosacral spine, mri of lumbosacral spine, a lumbosacral spine mri uses powerful magnets, radio waves to construct pictures, the structures that make up the spine, spinal cord, spaces between the vertebrae, the nerves travel, unlike conventional radiography, computed tomographic, ct, imaging, make use of potentially harmful radiation, x-rays, passing, 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 small percentage of hydrogen atoms, the body align, field, radio wave pulses, broadcast towards the hydrogen atoms in tissues of interest, returning a signal, 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 which slides into a large tunnel-like tube, the scanner, a contrast dye, 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, a complete scan, take up to one hour, newer scanners, more powerful magnets utilizing updated software, advanced sequences, complete the process in less time, , 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 "sweats", similar clothing, metal fasteners, infants, children, physical, psychological preparation, procedure depends on child's age, interests, level of trust, prepare child, they correspond to child's age, 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, after plain x-rays, the lower spine, mri, the next non-invasive imaging test a doctor, use to investigate back pain, radiating leg pain, mri is excellent at showing degenerative changes, from arthritis, narrowing the spaces, the spinal nerves travel, mri, demonstrate disease, the lumbar discs between vertebral levels which bulging, compression the spinal cord, an mri performed, trauma setting to rule out acute compression, the spinal cord, in the setting of weakness, paralysis, mri is also superior to computed tomography, ct, evaluation of abscesses, tumors, masses near the spinal cord, ct is better at detecting fractures, the vertebrae, mri, detect subtle changes, in the bone, due to infection, tumor, 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, people have been harmed in mri machines, did not remove metal objects from clothes, metal objects were left, in the room by others, 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.