Article Figures & Data
Figures
- Fig 1.
Experimental setup of an aneurysm model inside a human skull on the biplane Artis Q angiosuite.
- Fig 2.
Examples of the different image techniques applied: MPR and VRT of MDCTA images (A and B), MPR and VRT images of FDCTA images (C and D), MPR and VRT images obtained from a 3D-DSA run (E and F), short object-to-detector distance DSA image no optimal projection (G), and optimized projection DSA image with short object-to-detector distance (H, DSA rotation near).
- Fig 3.
Bland-Altman plots comparing all techniques with DSA rotation near MDCTA MPR (A) versus DSA rotation near MDCTA VRT (B) versus DSA rotation near FDCTA MPR (C) versus DSA rotation near FDCTA VRT (D) versus DSA rotation near 3D DSA MPR (E) versus DSA rotation near 3D DSA VRT (F) versus DSA rotation near DSA long (G) versus DSA rotation near DSA middle (H) versus DSA rotation near DSA rotation long (I) versus DSA rotation near DSA rotation middle versus DSA rotation near (J).
Tables
MDCTA FDCTA 3D DSA DSA FOV (cm) 10 × 10 10 × 10 10 × 10 15 × 15 Matrix size 512 × 512 512 × 512 512 × 512 1024 × 1024 In-plane resolutions (mm) 0.2 0.2 0.29 0.15 Cumulative dose (mGy) 30 40 9 53 - Table 2:
Aneurysm model 1—mean of differences in known aneurysm sizes (all 3 dimensions combined)
Statistics/Technique Mean (mm) SD SE of Mean Lower 95% CI Upper 95% CI FDCTA MPR 0.75 1.64 0.24 0.26 1.24 FDCTA VRT 0.99 0.69 0.10 0.78 1.20 MDCTA MPR 1.15 1.26 0.19 0.77 1.52 MDCTA VRT 1.91 0.69 0.10 1.70 2.11 DSA long 0.50 0.84 0.13 0.25 0.75 DSA middle 0.65 0.52 0.08 0.49 0.80 DSA near 0.66 0.71 0.11 0.45 0.87 3D DSA MPR 1.10 1.55 0.23 0.63 1.56 3D DSA VRT 1.19 0.69 0.10 0.98 1.40 DSA rotation long −0.05 1.71 0.25 −0.56 0.47 DSA rotation middle −0.15 0.64 0.09 −0.34 0.04 DSA rotation near −0.07 0.61 0.09 −0.25 0.18 Note:—SE indicates standard error.
- Table 3:
Aneurysm model 2—mean of differences in known aneurysm sizes (all 3 dimensions combined)
Statistics/Technique Mean (mm) SD SE of Mean Lower 95% CI Upper 95% CI FDCTA MPR 0.62 0.60 0.09 0.44 0.79 FDCTA VRT 0.40 0.48 0.07 0.25 0.54 MDCTA MPR 0.54 0.31 0.05 0.45 0.63 MDCTA VRT 0.83 0.37 0.06 0.72 0.94 DSA long 0.57 0.69 0.10 0.37 0.78 DSA middle 0.51 0.66 0.10 0.31 0.70 DSA near 0.63 0.73 0.11 0.41 0.85 3D DSA MPR 0.41 0.40 0.06 0.29 0.53 3D DSA VRT 0.68 0.49 0.07 0.53 0.82 DSA rotation long −0.05 0.34 0.05 −0.15 0.05 DSA rotation middle 0.17 0.39 0.06 0.052 0.28 DSA rotation near 0.12 0.25 0.04 0.05 0.20 Note:—SE indicates standard error.
- Table 4:
Statistical analyses of the Bland-Altman plots comparing all techniques against DSA rotation “near” images
Statistics/Technique Arithmetic Mean Differences (95% CI) Lower Limit (95% CI) Upper Limit (95% CI) FDCTA MPR −0.64 (−0.91 to −0.37) −3.14 (−3.60 to −2.68) 1.86 (1.40–2.32) FDCTA VRT −0.67 (−0.86 to −0.49) −2.37 (−2.68 to −2.06) 1.02 (0.71–1.33) MDCTA MPR −0.84 (−1.05 to −0.62) −2.89 (−3.27 to −2.52) 1.22 (0.85–1.60) MDCTA VRT −1.34 (−1.56 to −1.13) −3.37 (−3.74 to −2.99) 0.68 (0.31–1.05) DSA long −0.48 (−0.63 to −0.33) −1.90 (−2.16 to −1.64) 0.94 (0.68–1.20) DSA middle −0.51 (−0.67 to −0.36) −1.98 (−2.25 to −1.71) 0.95 (0.68–1.22) DSA near −0.58 (−0.75 to −0.41) −2.15 (−2.44 to −1.86) 0.99 (0.70–1.28) 3D DSA MPR −0.72 (−0.98 to −0.46) −3.19 (−3.64 to −2.74) 1.75 (1.30–2.20) 3D DSA VRT −0.86 (−1.03 to −0.69) −2.49 (−2.9 to −2.19) 0.77 (0.47–1.07) DSA rotation long 0.89 (−0.04 to −0.21) −1.13 (−1.36 to −0.91) 1.31 (1.09–1.54) DSA rotation middle 0.01 (−0.08 to −11) −0.89 (−1.05 to −0.71) 0.91 (0.75–1.08) Technique ICC 95% CI FDCTA MPR 0.8801 0.7932–0.9366 FDCTA VRT 0.9518 0.9078–0.9759 MDCTA MPR 0.9532 0.9065–0.9772 MDCTA VRT 0.9849 0.9712–0.9925 DSA long 0.9652 0.9377–0.9820 DSA middle 0.9838 0.9705–0.9917 DSA near 0.9806 0.9648–0.9901 3D DSA MPR 0.9063 0.7781–0.9577 3D DSA VRT 0.8638 0.7676–0.9275 DSA rotation long 0.8638 0.7676–0.9275 DSA rotation middle 0.9834 0.9700–0.9915 DSA rotation near 0.9855 0.9737–0.9926 Note:—ICC indicates interclass correlation coefficient.
