paramagnetic substance

paramagnetic substance

a substance with positive magnetic susceptibility resulting from the presence of unpaired atomic electrons (e.g., gadolinium chelates). These substances enhance magnetic relaxation and are often used as contrast agents in magnetic resonance imaging.
References in periodicals archive ?
68] White thrombi composed of platelets and fibrin[93] might be shown with lower rate of SVS on SWI, in the consideration of lacking paramagnetic substance comparing to red clot.
resonance (MR) technique with enhanced sensitivity for paramagnetic substances, such as blood products, iron, and calcification.
He pointed out that a paramagnetic substance (one that concentrates magnetic lines of force) can be placed almost in contact with liquid helium, separated from it by helium gas, and the temperature of the whole system reduced to about 1[degrees] K.
ESR is a branch of absorption spectroscopy in which radiation having frequency in the microwave region is absorbed by paramagnetic substances to induce transitions between magnetic energy levels of electrons with unpaired spins.
As paramagnetic substances, iron in ferrous and ferric states (deoxyhemoglobin, methemoglobin, and hemosiderin) can shorten T1 and T2.