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There is also a re-phased image, which is the magnitude of flow of the compensated signal. It includes bright high signal flow and a background that is visible. [1] The phase-contrast velocity image has greater sensitivity to CSF flow than the magnitude image, since the velocity image reflects the phase shifts of the protons. [5]
Radionuclide cisternography may be used to diagnose a spinal cerebrospinal fluid leak. CSF pressure is measured and imaged over 24 hours. [2] A radionuclide (radioisotope) is injected by lumbar puncture (spinal tap) into the cerebral spinal fluid to determine if there is abnormal CSF flow within the brain and spinal canal which can be altered by hydrocephalus, Arnold–Chiari malformation ...
It is most usually observed in the part of the spinal cord corresponding to the neck area. Symptoms are due to spinal cord damage and include pain, decreased sensation of touch, weakness, and loss of muscle tissue. The diagnosis is confirmed with a spinal CT, myelogram or MRI of the spinal cord. The cavity may be reduced by surgical ...
Common types of medical imaging include X-rays, computer tomography scan (CT), Magnetic resonance imaging (MRI), myelography, and bone scans. [1] [5] MRI is the imaging of choice for spinal tumors. [1] The MRI protocol that is most frequently used includes T1-weighted and T2-weighted sequences, including contrast enhanced T1-weighted sequences. [1]
The initial diagnosis of a tumor is made with a radiographic study (MRI [22] or CT-). If CT was performed first, an MRI is usually performed as the images are often more detailed and may reveal previously undetected metastatic tumors in other locations of the brain. In addition, an MRI of the spine is usually performed. The AT/RT tumor often ...
Leptomeningeal cancer is a rare complication of cancer in which the disease spreads from the original tumor site to the meninges surrounding the brain and spinal cord. [1] This leads to an inflammatory response, hence the alternative names neoplastic meningitis (NM), malignant meningitis , or carcinomatous meningitis .
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Cerebrospinal fluid fills the syrinx. Pressure differences along the spine cause the fluid to move within the cyst. Physicians believe that it is this continual movement of fluid that results in cyst growth and further damage to the spinal cord. In the case of syringomyelia, the syrinx can expand and elongate over time, destroying the spinal ...