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²Cutout type Expr > 0 defines the region to be removed by a general mathematical expression, rather than a single parameter
åThe expression uses the same syntax as 3dcalc
åVariables that can be used are ÔxÕ, ÔyÕ, and ÔzÕ, corresponding to spatial coordinates in the dataset
ØWhen using Automate (infra), variable ÔtÕ can also be used
ØThe (x, y, z) locations where the expression evaluates to a positive number will be cut out
åExample: rendering a slab tilted at an arbitrary angle between coronal (xz-plane) and axial (xy-plane):
width w
(y,z)=s*(sin(a),cos(a))  Slab is parallel to this line            s = distance along line
(y,z)=s*(cos(a),-sin(a)) Slab is perpendicular to this line
z
a
y