The present disclosure relates to apparatus and methods for improving visualization of biopsy site markers under ultrasound. In some implementations, the method for detecting a biopsy site marker in tissue may comprise inserting a biopsy site marker having a textured and/or irregular surface into the tissue, imaging the biopsy site marker using Doppler sonography, and identifying the marker based on twinkling artifact appearing on the Doppler sonography. In other implementations, the apparatus of the present disclosure may comprise a biopsy site marker for placement into human tissue, the marker having at least one textured or irregular surface capable of creating twinkling artifact when imaged using Doppler sonography.