http://www.k-wave.org/forum/topic/generated-image-pixel-dimension Support for the k-Wave MATLAB toolbox en-US Wed, 13 May 2026 09:39:49 +0000 http://bbpress.org/?v=1.0.2 q http://www.k-wave.org/forum/search.php http://www.k-wave.org/forum/topic/generated-image-pixel-dimension#post-5324 Tue, 24 Nov 2015 15:30:32 +0000 Bradley Treeby 5324@http://www.k-wave.org/forum/ <p>HI Salvatore,</p> <p>I'm afraid I'm not sure I follow your question. Do you think this is something related to the simulation of the ultrasound waves, or the processing that you are applying?</p> <p>Brad. </p> http://www.k-wave.org/forum/topic/generated-image-pixel-dimension#post-5312 Fri, 13 Nov 2015 11:01:38 +0000 salvatorescaramuzzino 5312@http://www.k-wave.org/forum/ <p>Hi to all,</p> <p>first of all thank you very much for thi useful tool. I have a question:</p> <p>i'm trying to simulate an ultrasound video, in order to validate a tracking algorithm. Following the 3d ultrasound tutorial, i defined a volume of 40x20x20 mm^3 with a grid of 216x108x108 points. as usual 1 have that 1 grid point = 185,185 um</p> <p>running the simulation i obtain an ultrasound b-mode image of 900x1200 px.<br /> performing an</p> <p>imagesc(horz_axis, r*1e3, scan_lines_fund.');</p> <p>i obtain an image of 900x1200 px with the first axis (of 900px) in range [0 , 41,9722] and second axis (of 1200 px) in range [0 , 35,1852]</p> <p>leading to a pixel dimension of 47 x 29 um.</p> <p>my problem rises when i try to generate two different frame with 2 my high scattering object moved of 1 point grid, e.g. in 1200px axes direction, in this case i expected a movement of 1200 / 108 = 11,11 pixel, but i achieve a movement of about 10px...</p> <p>what is the exact conversion factor between grid points displacements and pixels in cases like this? </p> <p>thanks in advance</p> <p>Salvatore </p>