Table 2:

Mean VAS scores of both observers, per arterial territory over 24 patients, for the presence of superimposed bone and veins in CTPa using standard CTA as a referencea

No. of Cases with Superimposed Bone in Standard CTAbPresence of Superimposed Bone in CTPaNo. of Cases with Superimposed Veins in Standard CTAcPresence of Superimposed Veins in CTPa
Av Obs 1Av Obs 2Av Obs 1Av Obs 2
Proximal area
    ACA territory125 %5 %184 %4 %
    MCAd territories45 %3 %236 %11 %
    PCA territory233 %3 %244 %9 %
More peripheral area
    ACA territory23 %3 %225 %16 %
    MCAd territories85 %2 %247 %20 %
    PCA territory0245 %20 %
  • Note:—Av indicates average; Obs, observer.

  • a A 0% score indicates no presence of superimposed bone and veins in CTPa compared with the full presence in standard CTA.

  • b Number of cases (of 24) in which bony structures hampered evaluation of arteries within the specific territory on standard CTA.

  • c Number of cases (of 24) in which veins hampered evaluation of arteries within the specific territory on standard CTA.

  • d Average over left and right sides.