The authors provide all the datasets used in the publication below, G. Malamal and M. R. Panicker, “On the Physics of Ultrasound Transmission for In-Plane Needle Tracking in Guided Interventions,” in Biomedical Physics and Engineering Express. https://doi.org/10.1088/2057-1976/acc338 (Academic Reference to be Cited) Abstract: In ultrasound (US) guided interventions, the accurate visualization and tracking of needles is a critical challenge, particularly during in-plane insertions. An inaccurate identification and localization of needles lead to severe inadvertent complications and increased procedure times. This is due to the inherent specular reflections from the needle with directivity depending on the angle of incidence of the US beam, and the needle inclination. Though several methods have been proposed for improved needle visualization, a detailed study emphasizing the physics of specular reflections resulting from the interaction of transmitted US beam with the needle remains to be explored. In this work, we discuss the properties of specular reflections from planar and spherical wave US transmissions respectively through multi-angle plane wave (PW) and synthetic transmit aperture (STA) techniques for in-plane needle insertion angles between 15°-50°. Related Scripts: https://github.com/gayathrimalamal/TxB_Needle_Ultrasound Details of Dataset: Readme_Dataset.pdf Request for Data: Data_Release_Agreement.pdf (Contact: mahesh@iitpkd.ac.in)