Siemens Software version syngo CT 2005C Enhancement Curve, Absolute/Relative Enhancement curve

syngo Dynamic Evaluation

6. Enhancement Curve

As soon as you have defined an ROI, an enhancement curve (time-density curve) is calculated and displayed in the fourth segment. To facilitate identification, this curve has the same color and numbering as the associ- ated ROI. The maximum CT-value of the ROI first drawn is indicated by a dashed sampling line.

In the table, for each ROI, the following parameters are given:

•Peak [HU]: Highest CT value detected in the ROI.

•Time to Peak [s]: Period of time in seconds from the time when the first image was acquired (Delay = 0) or the time when the contrast was injected (Delay > 0) to the time when the highest CT value is reached in an ROI.

•Sample [HU]: CT value at the point of time (in sec) where the vertical line is positioned on the enhance- ment curve.

Absolute/Relative Enhancement curve

The enhancement curves are displayed as absolute or relative curves.

•The Absolute Enhancement curve displays the origi- nal CT-value derived at every point in time during the examination.

•The Relative Enhancement curve displays the varia- tion of CT-values with reference to the CT-values in the baseline image at every point in time.

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