FFF.2.3.2.4 Examples
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##### FFF.2.3.2.4 Examples

The user performs an X-Ray acquisition in three steps:

- First step of 5 frames for mask acquisition, without contrast agent injection;

- Second step of 20 frames to assess the arterial phase, with contrast agent injection, to be subtracted to the average of the 5 mask frames acquired in the first phase;

- Third step of 10 frames to assess the venous phase, without further contrast agent injection, to be subtracted to a new mask related to that phase and with a 20% of mask visibility.

In the three steps, the system automatically identifies the mask frame(s) to be associated with the contrast frames.

The encoded values of the key attributes of this example are shown in Figure FFF.2.3-2.

Figure FFF.2.3-2. Attributes of Mask Subtraction and Display

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