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Intraoperative magnetic resonance imaging (iMRI) is an operating room configuration that enables surgeons to image the patient via an MRI scanner while the patient is undergoing surgery, particularly brain surgery. iMRI reduces the risk of damaging critical parts of the brain and helps confirm that the surgery was successful or if additional resection is needed before the patient's head is ...
Nowadays, MRI has all but replaced myelography. [4] MRI is preferable because injection of contrast medium into the spinal canal is infrequently needed for better images. However, a CT myelogram may be useful for patients who cannot undergo MRI (e.g., those with pacemakers or cochlear implants). CT is preferred when MRI images are limited by ...
Orthopedic surgery A Brodie abscess is a subacute osteomyelitis , appearing as an accumulation of pus in bone, frequently with an insidious onset. [ 1 ] Brodie's abscess is characterized by pain and swelling without fever, often resulting from diabetic wounds, fracture-related bone infection , or haematogenous osteomyelitis .
The patient should be adequately hydrated to remove contrast from the body. The patient should be observed following the examination for adverse effects of contrast media. The myelogram is performed on an outpatient basis, So the patient should be properly instructed regarding limitations following the procedure such as driving.
Osteomyelitis is a secondary complication in 1–3% of patients with pulmonary tuberculosis. [13] In this case, the bacteria, in general, spread to the bone through the circulatory system , first infecting the synovium (due to its higher oxygen concentration) before spreading to the adjacent bone. [ 13 ]
When the osteomyelitis is isolated in the back, as it is in vertebral osteomyelitis, the patient will report muscle spasms coming from the back, but may not report experiencing any fevers. [7] Symptomatic signs vary in each patient and depend on the severity of the case. Neurologic deficiency characterizes advanced, threatening cases of the ...
MRI without contrast agents is the imaging mode of choice for pre-surgical, in-utero diagnosis and evaluation of fetal tumors, primarily teratomas, facilitating open fetal surgery, other fetal interventions, and planning for procedures (such as the EXIT procedure) to safely deliver and treat babies whose defects would otherwise be fatal. [52] [53]
MRI contrast agents may be administered by injection into the blood stream or orally, depending on the subject of interest. Oral administration is well suited to gastrointestinal tract scans, while intravascular administration proves more useful for most other scans. MRI contrast agents can be classified [2] by their: Chemical composition