ɪn ˌæŋɡɪˈɑːɡɹəfi, ɐ sˈeɪliːn flˈʌʃ ɪz jˈuːzd tʊ ɪmpɹˈuːv ðə dɪspˈɜːʒən ʌv kˈɑːntɹæst mˈiːdiːə bᵻfˌoːɹ ˈɪmɪdʒɪŋ, ðɪs kæn pɹɪvˈɛnt stɹˈiːk ˈɑːɹɾɪfˌækt dˈuː tə kˈɑːnsəntɹˌeɪɾᵻd bˈændz ʌv kˈɑːntɹæst mˈiːdiːə ɪnðə suːpˈiəɹɪɚ vˈiːnə kˈɑːvə ænd bɹˌækɪoʊsfˈælɪk vˈeɪn.
In angiography, a saline flush is used to improve the dispersion of contrast media before imaging, This can prevent streak artefact due to concentrated bands of contrast media in the superior vena cava and brachiocephalic vein.