See Spectral line.

(TTP) A time to peak map shows the regional distribution of the time needed to the minimum perfusion signal, either gray scale or color-coded.

(PBP) A percentage of baselines at peak image can be reconstructed for a slice by perfusion imaging. The gray scale displays the signal-change relative to a basic image prior to contrast agent administration.

(PEAKS) This function offers consistent arterial enhancement for contrast enhanced MRA studies, augmenting the k-space with filling flexibility.

A bolus is a rapid infusion of high dose contrast agent. Dynamic and accumulation phase imaging can be performed after bolus injection. Since the transit time of the bolus through the tissue is only a few seconds, high temporal resolution imaging can be required to obtain sequential images during the wash in and wash out of the contrast material and, therefore, resolve the first pass of the tracer.
For the same injected dose of contrast agent the injection rate (and, consequently, the total injected volume) modifies the bolus peak profile. Increasing the injection rate produces a sharpening of the peak (Cmax increase, Tmax decrease, peak length decrease). At a low injection rate, the first pass presents a plateau form. Substantial changes in the gadolinium concentrations during signal acquisition induce artifacts. Furthermore, the haemodynamic parameters (cardiac output, blood pressure) influence the bolus profile. The characteristics of gadolinium agents are favorable in the early bolus phase, whereas the advantages of large complexes (e.g. blood pool agents) and ultrasmall superparamagnetic iron oxide (USPIO) are most evident in the distribution phase.