k-Wave

1. rehmanali1994
   

   Member
   Joined: May '16
   Posts: 8

   Dear All,

   I am wondering whether or not k-wave is able to simulate source directivity. I noticed that k-wave allows two different sources of sensor directivity: Figure-of-eight (cos(theta)) directivity; and directivity induced by spatial averaging. In a similar fashion, I was wondering whether or not it was possible to simulate these same sources of directivity, but for a source. If so, could you please show me how to do this?

   I am interested in being able to simulate both of these sources of directivity on both transmit and receive because in ultrasound imaging, the directivity of transducer elements affects the transmit beam that is produced as well as the backscattered signal received by all elements. Any help with simulating simultaneous source and sensor directivity would be greatly appreciated.

   Thank You,
   Rehman Ali

   Posted 7 years ago #

2. Bradley Treeby
   

   Developer
   Joined: Mar '10
   Posts: 1,643

   Hi Rehman,

   If the directivity just comes from the size of the radiating surface, you can model this by explicitly defining the geometry of the surface. For example, you can model the directivity of a plane piston source by defining source.p_mask to be a planar disc. Note, the directivity will be different depending on whether you use a pressure or velocity source (which will give a monopole and dipole directivity, respectively).

   Brad.

   Posted 7 years ago #

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