# fbp¶

Syntax: fbp(input image, output image, reconstruction settings, use GPU)

Performs filtered backprojection of data for which fbppreprocess has been called. This command is experimental and may change in the near future.

This command cannot be used in the distributed processing mode. If you need it, please contact the authors.

## Arguments¶

### input image [input]¶

Data type: float32 image

Input image.

### output image [output]¶

Data type: float32 image

Output image.

### reconstruction settings [input]¶

Data type: string

Default value: “”

Settings for the reconstruction. If this string contains only a name of an existing file, the settings are read from that file. Otherwise, the string is treated as contents of the settings file.

### use GPU [input]¶

Data type: boolean

Default value: True

Set to true to allow processing on a GPU.