NCCT (Non-Contrast Computed Tomography) Sacro-coccygeal region refers to a specific imaging examination using computed tomography without the use of contrast in the area of the sacrum and coccyx. The sacro-coccygeal region is the lowermost part of the spine, consisting of the sacrum (a triangular bone formed by the fusion of five vertebrae) and the coccyx (commonly known as the tailbone).