User`s guide

R14SP2
21-2
Major Bug Fixes
This release contains the following bug fixes.
Major Revisions to Fan-Beam Functions
This release includes numerous updates and improvements to the fan-beam functions:
fanbeam, ifanbeam, fan2para, and para2fan. The fixes include improved
calculations, improved documentation, and examples.
For example, fanbeam now returns the correct sensor locations when the geometry is
'line'. The ifanbeam and fan2para now consistently use the correct default value for
the 'FanSensorSpacing' parameter. If you tried the fan-beam functions in a previous
release, you might try them again to take advantage of these improvements.
In addition to the functional changes, many improvements to the documentation of the
fan-beam functions have been made.
fanbeam help now includes
• An example that shows how to extract projection data at a specific rotation angle from
the fan-beam data returned
• An explanation of how fanbeam calculates the number of rows and columns in F, the
fan-beam data returned
• The default value for the 'FanSensorSpacing' parameter for both 'line' and
'arc' geometries
• Guidelines for setting the value of the D parameter
The help for the ifanbeam function now includes an example that shows how to use the
'minimal' coverage parameter.
Compatilbility Considerations
Results computed with earlier versions of the fan-beam functions cannot be used with the
new versions of these functions.
Changes to the DICOM Functions
The following fixes have been made to the dicomread and dicomwrite functions.