Two different repetitive TMS (rTMS) protocols were applied to the motor cortex in 10 subjects and the effect on rCBF was measured using a CASL sequence with separate RF coils for labeling the inflowing blood.
In group 2, Ringer's lactate infusion was tapered accordingly, since there was continuous infusion of 4%% trisodium citrate at the inflow port of the catheter, which chelated the ionized calcium of inflowing blood.
Other techniques such as arterial spin labeling (ASL) based on intrinsic contrast of magnetised, inflowing blood into the imaging plane or volume have been investigated and applied for scientific studies, but have not yet found their way into clinical applications [60, 61].
In contrast, the viable rim consists of the tumor tissue that was not in contact with inflowing blood and therefore is still supplied with nutrients and oxygen.
The KE of inflowing blood has several possible consequences in the receiving ventricle.
Magnetic labelling of inflowing blood will be subject to the same energy loss mechanisms observed for any MRI experiments.
This suggests a shift in the specific effects of inflow KE on the myopathic ventricle, with increased interaction between the inflowing blood and the resident volume (delayed ejection flow and residual volume) and surrounding myocardium.
Moreover, converting motion of inflowing blood to motion of the residual volume may offer advantages in terms of less diastolic pressure rise, as well as in avoidance of thrombosis.
The overall goal of ASL is to produce a flow-sensitized image or "labelled" image and a "control" image in which the static tissue signals are identical, but where the magnetization of the inflowing blood differs.
Arterial spin labelling (ASL) is an MRI method in which an MR image can be sensitised to the effect of inflowing blood, and perfusion to tissues can be quantified.
