How to remove certain frequencies from an Image in order to remove lattice pattern using MATLAB? [duplicate]

This question already has an answer here:

• Removing periodic noise from an image using the Fourier Transform 1 answer

I am working on Electron Microscopy (EM) images. There are some lattice pattern inside images that I want to remove. I am using following approach:

1. Perform Fourier Transform (FFT)

2. Remove certain frequencies

3. Perform Inverse Fourier Transform (IFT)

I know about FT and IFFT, but don't know how can I remove / lower the certain frequencies so that I can remove the lattice pattern when I perform IFT on a fourier transformed image.

Can anybody guide in this regard please? 

P.S Image is attached for reference.