Ultrasound Physics: Beam Uniformity Coefficient

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Homework Help Overview

The discussion revolves around the concept of the "Beam Uniformity Coefficient" in ultrasound physics. The original poster seeks information on its calculation and significance, indicating a lack of available resources on the topic.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • Participants inquire about the definition and calculation of the Beam Uniformity Coefficient, with some expressing difficulty in finding relevant information. There are discussions about related concepts such as the Beam Uniformity Ratio (BUR) and the implications of beam profiles in different applications.

Discussion Status

Some participants have offered guidance on exploring related terms and concepts, while others have questioned the relevance and clarity of the term itself. The conversation reflects a collaborative effort to clarify the topic and identify useful resources.

Contextual Notes

Participants note the potential variability in the importance of the Beam Uniformity Coefficient depending on the field of application, suggesting that the context may influence its relevance and understanding.

Fresh4Christ
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Pertaining to ultrasound physics, what is a "Beam Uniformity Coefficient"? How is it calculated? And why is it important? etc...

I need to write couple page paper on it and I can't seem to find any information about it anywhere...Thanks.
 
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Well, I have searched all over for information on it and cannot find anything. The only thing I have is that it is a unitless number with value of 1 or greater that describes spread of beam in space. I have googled it, looked it up in an old physics book... everything... just can't seem to figure out any of the basics. I just need pointed in the right direction, I don't need answers. Like simple stuff, how is it even calculated... why is it used... If I have that information and some resources I should be able to write a bit on it. Thanks,
 
Yeah, I googled it as well, and found very little. I wonder if it is a new and non-typical term? Thread moved to the more Advanced Physics forum, and I'll ping some Homework Help resources...
 
Thank you I appreciate it. I have looked at the Beam Uniformity Ratio (BUR) (SP/SA Factor) to see if that was related... I'm not seeing the connection. Any help is appreciated.
 
Fresh4X,

Are you studying physics of medecine or something else?
It is clear that the importance may depend on the field of application.
What is your aim with the uniform beam?

Anyway, in any field it is clear that the power profile of the beam is not totally indifferent.
In http://rheumatology.oxfordjournals.org/cgi/content/full/40/12/1331" it is clear that sharp profiles will not have the same applications as soft profiles.

From a pure physics point of view a uniform beam will show up less diffraction than a sharp beam. If diffraction is to be minimized, for example to propagate with minimum losses over long distances, then the Gaussian shape will be the best. I know that from microwave optics, but it is exactly the same for ultrasounds.

So, if you ask yourself a bit more questions, you will find more answers ...
 
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