Example mMR geometry may be out of date?

[robbietuk]

https://github.com/UCL/STIR-GATE-Connection/blob/master/ExampleScanners/mMR/geometry_mMR.mac

This example mMR configuration does not use the virtual crystals found in the mMR. However, STIR can now support these virtual crystals (UCL/STIR#833 etc.).

See: #87

[KrisThielemans]

STIR can now support these virtual crystals

That is correct. https://github.com/UCL/STIR/blob/6417022e54a4814f25776bc8ca1df3acd4e865f6/src/buildblock/Scanner.cxx#L1620-L1630 hardwires 1 virtual crystal for the mMR (and som eother scanners). This can currently not be set via the interfile header. We do have keywords in the .hroot file

Number of virtual axial crystals per block := ...
Number of virtual transaxial crystals per block:= ...

However, currently they only check consistency

So, to use the (correct) 8x8 block, the following would have to be updated (e.g. by setting originating system to Siemens mMR)

STIR-GATE-Connection/ExampleScanners/mMR/root_header_template.hroot

Line 7 in c5ac1e0

originating system := User_defined_scanner

STIR-GATE-Connection/ExampleScanners/mMR/root_header_template.hroot

Line 31 in c5ac1e0

number of crystals Y := 9

STIR-GATE-Connection/ExampleScanners/mMR/STIR_scanner.hs

Line 4 in c5ac1e0

originating system :=

STIR-GATE-Connection/ExampleScanners/mMR/STIR_scanner.hs

Line 40 in c5ac1e0

Number of crystals per block in transaxial direction := 9

STIR-GATE-Connection/ExampleScanners/mMR/STIR_scanner.hs

Line 43 in c5ac1e0

Number of crystals per singles unit in transaxial direction := 9