blood oxygen level dependent

[phenomenon used in the study of brain function; an effect observed in susceptibility sensitive MR images due to the paramagnetic properties of hemoglobin; while oxyhemoglobin (the principal hemoglobin in arterial blood) has no substantial magnetic properties, deoxyhemoglobin (present in the draining veins after the oxygen has been unloaded in the tissues) is strongly paramagnetic; it can thus serve as an intrinsic paramagnetic contrast agent in appropriately performed MR imaging. ( CSP )]

UMLS (CSP) C1655730

blood oxygenation level dependent
BOLD