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346 VisualSonics Vevo 2100 Imaging System Operator Manual Rev 1.1

Chapter 47: Acquiring Contrast Mode images

Burst

Transmits an ultrasound pulse at maximum setting. This destroys the contrast agent in

the region of interest. In the cine loop the system displays a vertical green bar to mark the

destruction event.

Pre Trigger

In Contrast Mode, starts an analysis based on the number of frames defined in the

General tab of the Preferences window.

Stores cine loop data for a predefined number of image frames acquired after you press

the control, as compared to

Cine Store

which stores data acquired before you press the

control. To ensure that the system stores your cine loop, select the Auto SAVE at Scan

Completion option in the General tab of the Preferences window.

Image Sequence

In Contrast Mode this control starts a sequence of configurable events. When you press

the control:

1. The system begins to store image data for the predefined number of frames in the

cine loop, as configured in the Contrast Mode preferences (page 74) section of the

General tab in the Preferences window.

2. The destruction burst event (page 407) runs automatically:

 Using a) the transducer that you connect to the front panel of the Vevo 2100

Imaging System, or using b) the external Vevo SoniGene transducer that you

connect to the Parallel port on the rear panel of the cart

 At a predefined percentage point of the entire pretrigger cine loop length

 For a predefined period in tenths of seconds between 0.1 and 1.0 seconds (defaults

to 0.5)

3. The system continues to acquire image data for the remainder of the predefined cine

loop size, but the image is not automatically stored when the loop is completed

unless you select Auto SAVE on Scan Completion for Contrast Mode in the General

tab of the Preferences window.

To configure the control for Contrast Mode:

 In the Cine Loop Size section (page 71) of the General tab in the Preferences

window configure the size of the cine loop.

 In the Contrast Mode preferences section (page 74) of the General tab in the

Preferences window configure the parameters for the destruction sequence.

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VDO MG 2100 Especificações Página 346