LION.operators.ct.CTProjectionOp

class LION.operators.ct.CTProjectionOp(geometry, backend='tomosipo', device=None)

Bases: Operator

The CT projection operator of geometry (tomosipo) and its adjoint, the backprojection, on device (LION’s if None). backend: “tomosipo” (the only one). Its default reconstruction is FDK; autograd() gives tomosipo’s autograd versions of it and its adjoint.

Initialize internal Module state, shared by both nn.Module and ScriptModule.

__init__(geometry, backend='tomosipo', device=None)

Initialize internal Module state, shared by both nn.Module and ScriptModule.

Methods

__init__(geometry[, backend, device])	Initialize internal Module state, shared by both nn.Module and ScriptModule.
add_module(name, module)	Add a child module to the current module.
adjoint(y)	The backprojection of the projections y.
apply(fn)	Apply fn recursively to every submodule (as returned by .children()) as well as self.
autograd()	tomosipo's autograd wrappers of the (tomosipo) operator and its adjoint, on batches.
bfloat16()	Casts all floating point parameters and buffers to bfloat16 datatype.
buffers([recurse])	Return an iterator over module buffers.
children()	Return an iterator over immediate children modules.
compile(*args, **kwargs)	Compile this Module's forward using torch.compile().
cpu()	Move all model parameters and buffers to the CPU.
cuda([device])	Move all model parameters and buffers to the GPU.
default_reconstruction(y)	The operator's usual reconstruction of measurements y (default_reconstruction_fn, e.g. FDK for CT).
default_reconstruction_fn()	fdk: FDK (fan or cone beam) or FBP (parallel beam), clipped at 0.
double()	Casts all floating point parameters and buffers to double datatype.
eval()	Set the module in evaluation mode.
extra_repr()	Return the extra representation of the module.
float()	Casts all floating point parameters and buffers to float datatype.
forward(x)	The projections (sinogram) of the image x.
get_buffer(target)	Return the buffer given by target if it exists, otherwise throw an error.
get_extra_state()	Return any extra state to include in the module's state_dict.
get_parameter(target)	Return the parameter given by target if it exists, otherwise throw an error.
get_submodule(target)	Return the submodule given by target if it exists, otherwise throw an error.
gram(x)	The Gram operator, AᵀA, applied to x.
half()	Casts all floating point parameters and buffers to half datatype.
inverse(y)	The inverse applied to y, for operators that have one (e.g. an orthogonal transform): a subclass defines it only then, and its default reconstruction is then the inverse.
ipu([device])	Move all model parameters and buffers to the IPU.
load_state_dict(state_dict[, strict, assign])	Copy parameters and buffers from state_dict into this module and its descendants.
modules([remove_duplicate])	Return an iterator over all modules in the network.
mtia([device])	Move all model parameters and buffers to the MTIA.
named_buffers([prefix, recurse, ...])	Return an iterator over module buffers, yielding both the name of the buffer as well as the buffer itself.
named_children()	Return an iterator over immediate children modules, yielding both the name of the module as well as the module itself.
named_modules([memo, prefix, remove_duplicate])	Return an iterator over all modules in the network, yielding both the name of the module as well as the module itself.
named_parameters([prefix, recurse, ...])	Return an iterator over module parameters, yielding both the name of the parameter as well as the parameter itself.
parameters([recurse])	Return an iterator over module parameters.
register_backward_hook(hook)	Register a backward hook on the module.
register_buffer(name, tensor[, persistent])	Add a buffer to the module.
register_forward_hook(hook, *[, prepend, ...])	Register a forward hook on the module.
register_forward_pre_hook(hook, *[, ...])	Register a forward pre-hook on the module.
register_full_backward_hook(hook[, prepend])	Register a backward hook on the module.
register_full_backward_pre_hook(hook[, prepend])	Register a backward pre-hook on the module.
register_load_state_dict_post_hook(hook)	Register a post-hook to be run after module's load_state_dict() is called.
register_load_state_dict_pre_hook(hook)	Register a pre-hook to be run before module's load_state_dict() is called.
register_module(name, module)	Alias for add_module().
register_parameter(name, param)	Add a parameter to the module.
register_state_dict_post_hook(hook)	Register a post-hook for the state_dict() method.
register_state_dict_pre_hook(hook)	Register a pre-hook for the state_dict() method.
requires_grad_([requires_grad])	Change if autograd should record operations on parameters in this module.
set_extra_state(state)	Set extra state contained in the loaded state_dict.
set_submodule(target, module[, strict])	Set the submodule given by target if it exists, otherwise throw an error.
share_memory()	See torch.Tensor.share_memory_().
state_dict(*args[, destination, prefix, ...])	Return a dictionary containing references to the whole state of the module.
to(*args, **kwargs)	Move and/or cast the parameters and buffers.
to_device(device)	Moves the operator and its sub-operators to device, updating their device attributes (which nn.Module.to doesn't).
to_empty(*, device[, recurse])	Move the parameters and buffers to the specified device without copying storage.
train([mode])	Set the module in training mode.
type(dst_type)	Casts all parameters and buffers to dst_type.
xpu([device])	Move all model parameters and buffers to the XPU.
zero_grad([set_to_none])	Reset gradients of all model parameters.

Attributes

T_destination
call_super_init
domain_shape	Return the shape of the volume domain.
dump_patches
range_shape	Return the shape of the projection range.
training

forward(x)

The projections (sinogram) of the image x. Call the operator, op(x), rather than this method (as for torch modules).

adjoint(y)

The backprojection of the projections y.

autograd()

tomosipo’s autograd wrappers of the (tomosipo) operator and its adjoint, on batches.

default_reconstruction_fn()

fdk: FDK (fan or cone beam) or FBP (parallel beam), clipped at 0.

property domain_shape

Return the shape of the volume domain.

property range_shape

Return the shape of the projection range.