释义 |
high-resolution computed tomography
high-res·o·lu·tion com·put·ed to·mog·ra·phy (HRCT), computed tomography with narrow collimation to reduce volume-averaging and an edge-enhancing reconstruction algorithm to sharpen the image, sometimes with a restricted field of view to minimize the size of pixels in the region imaged; used particularly for lung imaging.high-resolution computed tomography Computed tomography which combines thin collimation (1.0 to 1.5 mm) and a high-spatial frequency algorithm, resulting in images which, in chest imaging, correlate well with the gross pathology specimens.high-resolution computed tomography Imaging CT at slice–collimation scan interval widths of ≤ 4 mm, which is narrower than the usual 1-3 cm interval 'slices' obtained in conventional CT imaging. Cf Spiral computed tomography. high-res·o·lu·tion com·put·ed to·mog·ra·phy (HRCT) (hī-rez'ŏ-lū'shŭn kŏm-pyū'tĕd tŏ-mog'ră-fē) Computed tomography with narrow collimation to reduce volume-averaging and an edge-enhancing reconstruction algorithm to sharpen the image, sometimes with a restricted field of view to minimize the size of pixels in the region imaged; used particularly for lung imaging. |