Optical coherence tomography angiography method and apparatus, and electronic device and storage medium

An apparatus for optical coherence tomography angiography, comprising:

• an acquiring module configured to acquire time domain signals of a target area, the time domain signals being N interference spectrum signals obtained by repeating A-scans on the target area N times;
• a scale-transforming module configured to perform scale transform on respective interference spectrum signals in the N interference spectrum signals based on k scales, to obtain N×k scale-transformed signals;
• wherein performing scale transform on any interference spectrum signal based on the k scales comprises:
• decomposing the any interference spectrum signal based on each of the k scales, to obtain k scale-transformed signals corresponding to the any interference spectrum signal;
• a frequency domain transforming module configured to perform Fourier transform on each of the scale-transformed signals and take a logarithm, to obtain an axial frequency domain signal in a logarithmic space, and denoise the axial frequency domain signal;
• a decorrelation module configured to divide, based on the k scales, N×k of the axial frequency domain signals denoised into k sets of single-scale signals, and perform decorrelation calculation on each set of the single-scale signals to obtain single-scale blood flow signals;
• a fusion module configured to obtain a multi-scale blood flow signal based on k sets of the single-scale blood flow signals;
• and
• an imaging module configured to obtain a blood flow image based on the multi-scale blood flow signal.