Table 1 Complete list of all geometric parameters

1

Height (H), mm [34]

Maximum perpendicular distance from the neck plane to the aneurysm surface

2

Maximum dimension (L_max), mm [40]

Maximum distance between two points on the aneurysm surface

3

Maximum height (H_max), mm [14]

Maximum distance between the centroid of the neck and the aneurysm surface

4

Maximum diameter (D_max), mm

Maximum neck plane-parallel distance between two points on the aneurysm surface

5

Bulge height (H_b), mm [34, modified]

Distance between the neck plane and the maximum diameter

6

Surface area (A), mm² [14]

Surface area of the aneurysm

7

Convex hull surface area (A_CH), mm² [14]

Surface area of the aneurysm’s convex hull

8

Minimal bounding sphere surface area (A_MBS), mm² [41]

Surface area of the aneurysm’s minimal bounding sphere

9

Closed surface area (A_closed), mm²

Surface area of the neck-closed aneurysm

10

Volume (V), mm³ [14]

Volume of the neck-closed aneurysm

11

Convex hull volume (V_CH), mm³ [14]

Volume of the aneurysm’s convex hull

12

Minimal bounding sphere volume (A_MBS), mm³ [41]

Volume of the aneurysm’s minimal bounding sphere

13

Minimum neck diameter (D_neck,min), mm

Minimum distance between two opposite points on the neck perimeter

14

Maximum neck diameter (D_neck,max), mm [42]

Maximum distance between two points on the neck perimeter

15

Neck perimeter (P_neck), mm [34, modified]

Perimeter of the aneurysm neck

16

Equivalent neck diameter (D_neck,equiv), mm [34, modified]

Hydraulic diameter of the aneurysm neck

17

Neck area (A_neck), mm² [34, modified]

Area of the aneurysm neck

18

Elliptical neck area (A_{neck,elliptical}), mm²

Neck area calculated by using the product of the minimum and maximum neck diameter

19

Size ratio (SR) [14]

Ratio of aneurysm size to the parent vessel diameter

20

Aspect ratio (AR) [42, modified]

Ratio of height to maximum neck diameter

21

Equivalent aspect ratio (eAR) [34, modified]

Ratio of height to equivalent neck diameter

22

Bottleneck factor (BF) [34, modified]

Ratio of maximum diameter to maximum neck diameter

23

Bulge location (BL) [34, modified]

Ratio of bulge height to height

24

Nonsphericity index (NSI) [14]

Normalized ratio of volume to surface area relative to a hemisphere

25

Isoperimetric ratio (IPR) [34]

Normalized ratio of surface area to volume

26

Aneurysm volume to bounding sphere volume (AVSV) [41]

Ratio of volume to minimal bounding sphere volume

27

Aneurysm surface area to bounding sphere area (AASA) [41]

Ratio of surface area to minimal bounding sphere surface area

28

Undulation index (UI) [14]

1 minus the ratio of volume to convex hull volume

29

Convexity ratio (CR) [34]

Ratio of volume to convex hull volume

30

Ellipticity index (EI) [14]

Normalized ratio of convex hull volume to convex hull surface area relative to a hemisphere

31

Mean of mean curvature (MAA), mm⁻¹ [34]

Surface average of local mean curvature

32

Mean of absolute mean curvature (absMAA), mm⁻¹

Surface average of the magnitude of the local mean curvature

33

Standard deviation of mean curvature (MSD), mm⁻¹

Standard deviation of the local mean curvature

34

High mean curvature (HMC), % [41, modified]

Relative increase of the mean of absolute mean curvature over the mean curvature of the minimal bounding sphere, in percent

35

L2-norm of mean curvature (MLN) [34]

Scale invariant measure of surface irregularity, uses mean curvature

36

Mean of Gaussian curvature (GAA), mm⁻² [34]

Surface average of local Gaussian curvature

37

Mean of absolute Gaussian curvature (absGAA), mm⁻²

Surface average of the magnitude of the local Gaussian curvature

38

Standard deviation of Gaussian curvature (GSD), mm⁻²

Standard deviation of the local Gaussian curvature

39

High Gaussian curvature (HGC), % [41, modified]

Relative increase of the mean of absolute Gaussian curvature over the Gaussian curvature of the minimal bounding sphere, in percent

40

L2-norm of Gaussian curvature (GLN) [34]

Scale invariant measure of surface irregularity, uses Gaussian curvature