Added Siemens Quadra scanner in the scanner.cxx and .h

[z-k-li]

Changes in this pull request

Added Siemens Quadra scanner in scanner.cxx and .h.

Testing performed

Built on own machine and test create_projdata_template.

Related issues

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• I have performed a self-review of my code
• [] I have added docstrings/doxygen in line with the guidance in the developer guide
• [] I have implemented unit tests that cover any new or modified functionality (if applicable)
• The code builds and runs on my machine
• [] documentation/release_XXX.md has been updated with any functionality change (if applicable)

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[KrisThielemans]

test_Scanner gives

WARNING: Scanner Siemens Quadra: inconsistent axial block info: 320 vs 323
Error. check_consistency

an extra ring between "Vision 600" scanners? Need to do something with virtual rings then.

[KrisThielemans]

FYI, discussion for future work (not this PR!) in #1388

[KrisThielemans]

To get this across the line, we need to change the num_axial_crystals_per_block to be a whole "Vision 600", and add an axial virtual crystal, as discussed. I'd be eager to merge this.