Acquiring data using the Vantage scanner and the CFU_scan program

Thursday, May 23, 15.00-17.00 on the top floor in build 349, rooms 215 and 229.

Purpose:

The purpose of this exercise is to acquire ultrasound RF datasets from a wire phantom and from a tissue-mimicking phantom and beamform them.

Preparation:

Read the description of the CFU_scan program.

Exercise:

1. While waiting for your turn to perform a test scan, develop your beamforming routine using the reference data set. The tims slots for the various groups can be found at: Groups.
2. To extract emission data, use the function:

   [filtered_samples, t_start, rx_fs, elem_positions, vsrc_position, c] ...
                = load_scan_data(path_data, frame_index, em_idx);
       

   where the output is:

     filtered_samples - RF data with matched filter applied; 
                        raw RF data can be obtained by modifying the function
     t_start - start time of the RF data
     rx_fs - sampling frequency of the recorded RF data
     elem_position - element positions [N x 3], containing X, Y and Z for 
                     every active element on the requested emission
     vsrc_position - position of the virtual source
     c - speed of sound in the phantom     
     

3. Start CFU_scan, chose a scan location while in preview mode.

   
   
   Image for the wire phantom
   
   
   
   Image for the cyst phantom
   
   

4. On the wire phantom: Acquire one frame and save it. Transfer it to the USB drive and then to your compute.

5. On the tissue-mimicking phantom: Acquire 10 frames and save them. Transfer them to the USB drive and then to your compute.

6. Beamform the images using the beamformation routine developed by you previously.

Equipment

1. a Vantage scanner
2. a linear transducer GE L3-12-D / L9-D
3. a wire phantom
4. a tissue-mimicking phantom