“…To assess active bleeding and to identify bleeding causes, a multiphasic CT evaluation is mandatory ( Figure 6 ) [ 149 , 150 , 151 , 152 , 153 , 154 ]. During pre-contrast CT evaluation, a blood collection with an attenuation of 30–45 HU could be found [ 155 , 156 , 157 , 158 , 159 , 160 , 161 , 162 , 163 , 164 , 165 ].…”