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Blood Oxygen Level Dependent Imaging
A magnetic resonance imaging technique that uses the difference between the magnetic signals of hemoglobin when it is carrying oxygen (oxyhemoglobin) and when it is not carrying oxygen (deoxyhemoglobin) to detect metabolic activity, and hence neurologic activity, in the brain. (NCI Thesaurus)
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A blood group indicating the absence on erythrocytes of both the A and B forms of the H Antigen.
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