Grow · Flow · Transport · Phantom
Perfusion Phantoms from Grown Vascular Trees
Grow a complete vascular tree inside any organ from the few vessels a scan shows, compute its blood flow from the pressures alone, send a contrast injection through it, and export a voxelized perfusion phantom for CT simulation. One algorithm for every organ; an organ differs only in the numbers you give it.
Four Stages
Each stage is one function and one spec struct. A new organ is four more instances, not a new code path.
The imaged coronaries (left) and the tree grown from them (right)
Grow
Start from the vessels a scan shows and grow the rest of the tree inside the organ. A million terminals in about 40 seconds on a laptop GPU.
Flow against perfusion pressure, at rest and at maximal dilation, beside human PET
Flow
Every vessel's flow follows from the inlet and outlet pressures, the vessel sizes and the arterioles' tone. No flow is prescribed.
When the bolus reaches each stage on its way to the heart, and the enhancement it gives
Transport
A clinical injection travels through the whole body into the grown tree, then through every capillary bed and vein, with recirculation.
The XCAT chest at 0.2 mm, axial and coronal, coloured by voxel class
Phantom
One folder per scenario on one grid: labels, ROIs, ground-truth blood flow and iodine every second, ready for a CT simulator.