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|Rick||Last replied to at October 25, 2015, 9:16 am|
Is resolution increase with bandwidth?
|Stretch||Last replied to at June 6, 2011, 7:00 pm|
Got it! Thanks a lot again for hleipng me out!
|PJ||Last replied to at June 13, 2009, 9:48 am|
Only axial resolution increase with bandwidth
|PJ||Last replied to at May 20, 2009, 1:43 pm|
The bandwidth of a transducer is calculated by KLM model. For an array, calculated by acoustic stack of each element.
|PJ||Last replied to at May 20, 2009, 1:42 pm|
Rick: axial resolution increases with bandwidth. But the lateral decrease with it.
|TT||Last replied to at April 22, 2009, 2:49 pm|
How is bandwidth calculated for a transducer? and in a linear array? Thanks
|PJ||Last replied to at May 5, 2008, 12:20 pm|
I would like to answer Jsutin's question:
The aperture is defined as the active area of transducer. For round single element transducer, the aperture is its diameter. For rectangle transducer, the beam is asymtery along two dimensions. And the aperure size is its width or length, depends on which dimension you want to calculate the beam.
For linear array, several elements work together, for example, maybe 32, and aperture size is 32*(element width = kerf). You may have noticed that pitch is the element width plus kerf size.
Is it helpful?
|JustinJi||Last replied to at May 5, 2008, 7:47 am|
the aperture = the width or diameter of activated elements ?(such as medical array)
How about your understanding of "the ultimate lateral resolution is the pitch of element" and the applicaiton?(Why we need to make high density transducer array?)
|BL||Last replied to at April 22, 2008, 12:57 pm|
Axial resolution: = pulse length/2;
lateral resolution = Fnumber * wavelength = Focal depth / apertuer diameter * wave length.
To achieve good axial resolution, short pulse is required. that is why wide bandwidth transducer is important.
|JustinJi||Last replied to at April 12, 2008, 9:33 pm|
could you give a function about the relationship between frequency, axial resolution and lateral resolution?
|BL||Last replied to at November 13, 2007, 8:42 pm|
The axial resolution increase with bandwidth but lateral resolution will decrease.