1. A method for obtaining perfusion data, said method comprising: providing an object of interest; estimating a first quantity of contrast agent utilized by a mono-energy computed tomography (CT) imaging system to image the object of interest; introducing a second quantity of contrast agent into the object of interest, the second quantity of contrast agent less than the first quantity of contrast agent; and scanning the object of interest using a multi-energy Computed Tomography (MECT) system to acquire data.