Tomography, Spiral Computed

**Definition:** Computed tomography where there is continuous X-ray exposure to the patient while being transported in a spiral or helical pattern through the beam of irradiation. This provides improved three-dimensional contrast and spatial resolution compared to conventional computed tomography, where data is obtained and computed from individual sequential exposures.

**Tree numbers:** - E01.370.350.350.810.800 - E01.370.350.600.350.700.810.800 - E01.370.350.700.700.810.800 - E01.370.350.700.810.810.800 - E01.370.350.825.810.810.800

**Synonyms:** - Helical CT - Spiral Computed Tomography - Tomography, Helical Computed - CAT Scan, Spiral - Computed Tomography, Spiral - Computer-Assisted Tomography, Spiral - Computerized Tomography, Spiral - CT Scan, Spiral - Helical Computed Tomography - Spiral CT