methemoglobin

At highest field strengths, the core of the clot may have low signal on T2-weighted images, due to the presence of intracellular methemoglobin or of deoxyhemoglobin.

高场强时，血块的中心在T2加权像上是低，这是由于细胞的高铁血红蛋原型血红蛋存在产生的。