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Does An Eeg Use Radiation
This is light of extremely short wavelengths typically produced either among the stars / in cosmic rays or by radioactive element decay. Gamma rays form the background of normal radiation in which we all live; it is substantially greater than the exposure we get from imaging scans or should get from ...Read more
VAGUELY ACCURATE: An EEG is a recording of brain electrical activity taken over the scalp, over about 45 minutes. This brief period may completely miss many paroxysmal events and provide a false negative/normal result. Work with direct electrodes implanted into brain have convincingly demonstrated far more pathology than external recordings. So, basically "hit or miss" issues, and better to clinically assess. ...Read more
Tests brain activity: A noninvasive, painless exam where electrodes are placed on scalp and electrical activity is recorded via computer. Patient usually sits in a chair, or lays on a stretcher. Indications include seizures and other causes of brain dysfunction. May be used to both diagnose and monitor a seizure disorder. ...Read moreSee 1 more doctor answer
Not directly: Eeg measures the activity of brain cells, not tumors. If the tumor is effecting a significant number of brain cells, the eeg may be abnormal. Some tumors cause enough irritation of the brain to cause seizures. These seizures can be located in the brain by eeg. Some tumors will have no effect on the eeg. ...Read moreSee 2 more doctor answers
Brain activity: Eeg measures brain electrical activity by using scalp electrodes. Eeg is more sensitive and gives a better global look at brain function. Typical MRI does not assess brain function. Functional MRI can indirectly measure brain activity also by measuring oxygen delivery to portions of the brain. ...Read more
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