k-Wave

1. gigi
   

   Member
   Joined: Oct '14
   Posts: 12

   Hi All, Hi Dr. Cox and Dr. Treeby,
   I'm would like save pre-beamforming RF data channel,
   ie data without delay, of if you want data without any optical lens.
   Is it possible to obtain them using transducer class?
   If yes how must I set the attributes of the class the are generally used to obtain beamformed signals? It is possible to see an example?

   One more question, reading the manual I understand that generally delays shifts are performed two times both in input and output, it is true?

   I hope that my questions are clear.

   Gg

   Posted 10 years ago #

2. Bradley Treeby
   

   Developer
   Joined: Mar '10
   Posts: 1,643

   Hi Gg,

   If you perform a simulation with an object of the kWaveTransducer class as the sensor, the data that is returned is the raw pressure data for each physical transducer element, i.e., before any beamforming.

   Within the code, the signal for each physical element is averaged across the grid points that form part of the element. This includes any delays in the elevation direction if there is an elevation focus set. However, this can be turned off by setting elevation_focus_distance to inf.

   The beamforming on receive is only performed if you call the scan_line method. There are more details in the Using An Ultrasound Transducer As A Sensor Example.

   Hope that helps,

   Brad.

   Posted 10 years ago #

3. gigi
   

   Member
   Joined: Oct '14
   Posts: 12

   Hi Brad,

   Thanks a lot.

   At the next question.

   Gg

   Posted 10 years ago #

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