In-room imaging and MR planning

Derived Parameters

Other parameters: • Extraction fraction ( E ): average volume of contrast media allowable in the extravascular-extracellualr space (EES): , if BF>>PS (like for tumors) we can write:

, dimensionless.

• k trans : constant of transfer from intravascular space to EES. It is closely related to PS, and often given instead of it, under the assumption BF>>PS.

Unit of measure

Tofts: “Modeling Tracer Kinetick in Dynamic Gd-DTPA MR Imaging” JMRI 7(1) , 92-101 (1997)