Optical Doppler tomography or Doppler OCT (D-OCT) is an example of a purely phase-based technique for imaging flow velocity of moving particles in a highly scattering medium.7,8 In D-OCT, based on SD or SS implementation, the blood circulation is evaluated by taking the phase difference between adjacent A-line scans in B-frame.7–11 Although the D-OCT algorithm is capable of imaging and quantification of flow velocity in relatively large blood vessels,8,24 the velocity of the dynamic component of small vessels are underestimated due to the presence of static scattering.20,24 Moreover, this technique is sensitive to the Doppler angle and is unable to detect the flow components perpendicular to the scanning beam.25,26 Phase variance11 and Doppler variance are other alternative phase-based methods developed for the visualization of microcirculation.27 Unlike D-OCT, these methods are insensitive to Doppler angle. These methods are capable of detecting both transverse and axial flow, and do not require any nonperpendicular beam of incidence. Optical microangiography (OMAG)18 and rapid volumetric angiography21 are examples of techniques that utilize the complex field of both amplitude and phase of the OCT signal. OMAG utilizes a modified Hilbert-transform-based algorithm to separate the dynamic scatterers from static tissue background. By applying the OMAG algorithm along the slow scanning axis, high-sensitivity imaging of capillary flow can be achieved. For obtaining high sensitivity, OMAG requires the removal of bulk motion artifact by resolving the Doppler shift. Recently, the flow sensitivity of OMAG has been enhanced using a new processing and scanning protocol termed ultra-high-sensitive OMAG,20 which utilizes the OMAG algorithm in the C-scan direction to obtain high-sensitivity flow map. To date, based on SDOCT technology, a couple of OCT angiography techniques utilizing the complex field of the OCT signal have been proposed by various research groups.28–30 However, phase-based methods are more susceptible to the axial movement of bulk tissue and other sources of motion artifacts such as galvanometer jitter, physiological motion, and thermal drift, which require more sophisticated methods of the bulk motion phase correction. On the other hand, magnitude-based angiography techniques are purely based on the amplitude of the OCT signal. Techniques termed speckle-variance OCT12,13 and split-spectrum amplitude decorrelation angiography16 are examples of magnitude-based methods. Unlike phase-based technique, magnitude-based techniques are insensitive to bulk phase changes and, therefore, do not require any sophisticated phase correction methods.