HD	High-Definition
OP0	European independent Professional Operator
OP1	Operator 1, with experience using the 3D scanner
OP1-A	Operator 1, first scan
OP1-A*	the aligned scans of OP1-A on OP0
OP1-B	Operator 1, second scan
OP2	Operator 2, with minimal prior experience using the 3D scanner
VDI/VDE	Association of German Engineers and Association for Electrical, Electronic, and Information Technologies
PETG	Polyethylene Terephthalate Glycol
USA1	First United States site
USA2	Second United States site
EU	European site
O&P	Orthotic and Prosthetic
MRE	mean radial error
VR	reference mesh
$\overrightarrow{d}$	distance between meshes
RE	radial error
VM	measured mesh
npoints	mesh points
RMSE-RE	root mean square error of the radial distance
MAE	mean angle error
AE	angle error
$\overrightarrow{n^R}$	normal vector to the reference mesh
$\overrightarrow{n^M}$	normal vector to the measured mesh
MCID	minimal clinically important difference
A	Most distal point of the model
MPT	Mid Patellar Tendon
BAR	Midpoint Between the origin of Adductor longus and the ischial Ramus
MDC	minimal detectable change
CR	Coefficient of Repeatability
TT	Transtibial
TF	Transfemoral