<html> <head> <style></style></head> <body class='hmmessage'><div dir='ltr'>Dear all, I have a problem concerning the ECAT7 Output. I would like to simulate a user defined scanner and not the E962 scanner type. The created yourSinogram.S file still contains the default values (ring diameter, detectors per ring,...) for the E962 scanner model. Is there a possbility to get this ECAT7 *.S output with the user defined scanner values? The code for the user defined scanner type can be seen below: /gate/world/daughters/name ecat /gate/world/daughters/insert cylinder /gate/ecat/setMaterial Air /gate/ecat/geometry/setRmax 44.1 cm /gate/ecat/geometry/setRmin 42.1 cm /gate/ecat/geometry/setHeight 21.7685 cm /gate/ecat/vis/forceWireframe # B L O C K /gate/ecat/daughters/name block /gate/ecat/daughters/insert box /gate/block/placement/setTranslation 431.0 0.0 0.0 mm /gate/block/geometry/setXLength 20.0 mm /gate/block/geometry/setYLength 52.17127 mm /gate/block/geometry/setZLength 52.17127 mm /gate/block/setMaterial Air /gate/block/vis/forceWireframe # C R Y S T A L /gate/block/daughters/name crystal /gate/block/daughters/insert box /gate/crystal/geometry/setXLength 20.0 mm /gate/crystal/geometry/setYLength 4 mm /gate/crystal/geometry/setZLength 4 mm /gate/crystal/setMaterial LSO /gate/crystal/vis/setColor yellow # R E P E A T C R Y S T A L /gate/crystal/repeaters/insert cubicArray /gate/crystal/cubicArray/setRepeatNumberX 1 /gate/crystal/cubicArray/setRepeatNumberY 13 /gate/crystal/cubicArray/setRepeatNumberZ 13 /gate/crystal/cubicArray/setRepeatVector 0. 4.0142725 4.0142725 mm # R E P E A T BLOCK (reproduziert die Box entlang eines Rings) /gate/block/repeaters/insert linear /gate/block/linear/setRepeatNumber 4 /gate/block/linear/setRepeatVector 0. 0. 55.17127 mm /gate/block/repeaters/insert ring /gate/block/ring/setRepeatNumber 48 The ecat7 code can be seen below: /gate/output/ecat7/enable /gate/output/ecat7/verbose 2 /gate/output/ecat7/setFileName yourSinogram /gate/output/ecat7/describe /gate/output/ecat7/mashing 2 /gate/output/ecat7/span 103 /gate/output/ecat7/maxringdiff 51 #/gate/output/ecat7/system 962 Looking at the values from the yoursinogram.S using list_projdata_info from STIR shows: WARNING: ECAT7 IO: Couldn't determine the scanner (Main_header.system_type=0), defaulting to 962. This might give dramatic problems. WARNING: ECAT7 IO: Bin size from header.x_resolution (2.00714) does not agree with expected value 2.25 for scanner ECAT 962. Using bin size from header... Info for file yourSinogram.S ProjDataInfoCylindricalNoArcCorr := Scanner parameters:= Scanner type := ECAT 962 Number of rings := 32 Number of detectors per ring := 576 Inner ring diameter (cm) := 82.4 Average depth of interaction (cm) := 0.7 Distance between rings (cm) := 0.485 Default bin size (cm) := 0.200714 View offset (degrees) := 0 Maximum number of non-arc-corrected bins := 288 Default number of arc-corrected bins := 288 Number of blocks per bucket in transaxial direction := 3 Number of blocks per bucket in axial direction := 4 Number of crystals per block in axial direction := 8 Number of crystals per block in transaxial direction := 8 Number of detector layers := 1 Number of crystals per singles unit in axial direction := 8 Number of crystals per singles unit in transaxial direction := 24 end scanner parameters:= Thanks in advance, Johannes </div></body> </html>