How to convert scan-lines in polar coordinates to a b-mode ?

Dear All,

I want to convert raw data from ultrasound equipment to b mode image.

If anyone know how to convert it please help or remcomend some method.

Thanks and Regards!

Han

Answer 1

[Vidip Jain]

Hi Jenifer, here is a basic example of how you can convert raw ultrasound data into a B-mode image in MATLAB:

1. Load the raw ultrasound data into MATLAB. The format of the raw data may vary depending on the type of ultrasound equipment used, but it is typically in a binary file format.
2. Pre-process the raw data to remove any DC offset or noise, and adjust the gain and time-gain compensation (TGC) to enhance the image quality. This step is critical to ensure that the resulting image is accurate and of high quality.
3. Apply a suitable envelope detection method, such as the Hilbert transform, to extract the envelope of the signal. This step is necessary to convert the raw data into a form that can be visualized as an image.
4. Use an appropriate beamforming algorithm, such as delay-and-sum (DAS) or synthetic aperture imaging (SAI), to generate an image from the envelope data. This step involves combining the signals from multiple transducer elements to form a coherent image.
5. Adjust the display settings of the image to optimize the contrast and brightness.

The resulting image is displayed using the imagesc function, which creates a 2D color-coded image from the data and here is the documentation for the same Display image with scaled colors - MATLAB imagesc (mathworks.com).

[Jenifer NG]

Hi Vidip Jain,

Could you try with this Raw file ?

I use 35MHz transducer to get this raw image file.

Thanks you!

Hna