Human blood was obtained from the cubital vein of male volunteers and utilised to produce ten different types of thrombi. The acquired blood was first centrifuged to separate RBC and plasma (PL) and then mixed for ten different preparations of RBC and PL with volumetric ratios of (RBC:PL): 5:95%; 10:90%; 20:80%; 30:70%; 40:60%; 50:50%; 60:40%; 70:30%; 80:20%; 90:10%. A static production technique was applied to create ten different types of thrombi from these preparations, characterised by varying levels of RBC and fibrin content. Ten specimens of each thrombus type were produced. The thrombi were placed in an agarose-gel based pantom for CT imaging. The phantom and thrombi were scanned in an SDCT [Fig. 1] to evaluate their conventional and spectral characteristics. For quantification, a region of interest was placed across each thrombus and the CT density in Hounsfield Units (HU) was measured in conventional images. In addition, the following spectral parameters were measured in corresponding spectral maps: electron density (ED), effective atomic number (Zeff) and the CT density in virtual monoenergetic (MonoE) maps ranging from 40-200 keV in steps of 20 keV.