derenzo_sources

odl.phantom.emission.derenzo_sources(space, min_pt=None, max_pt=None)

Create the PET/SPECT Derenzo sources phantom.

The Derenzo phantom contains a series of circles of decreasing size.

In 3d the phantom is simply the 2d phantom extended in the z direction as cylinders.

Parameters:

spaceDiscretizedSpace

Space in which the phantom should be created, must be 2- or 3-dimensional. If space.shape is 1 in an axis, a corresponding slice of the phantom is created (instead of squashing the whole phantom into the slice).

min_pt, max_ptarray-like, optional

If provided, use these vectors to determine the bounding box of the phantom instead of space.min_pt and space.max_pt. It is currently required that min_pt >= space.min_pt and max_pt <= space.max_pt, i.e., shifting or scaling outside the original space is not allowed.

Providing one of them results in a shift, e.g., for min_pt:

new_min_pt = min_pt
new_max_pt = space.max_pt + (min_pt - space.min_pt)

Providing both results in a scaled version of the phantom.

Returns:

phantomspace element

The Derenzo source phantom in the given space.