template_sinogram.hs文件用于配置重建参数。

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!INTERFILE  :=
!imaging modality := PT
name of data file := template_sinogram.hs
originating system := userdefined
!version of keys := STIR3.0
!GENERAL DATA :=
!GENERAL IMAGE DATA :=
!type of data := PET
imagedata byte order := LITTLEENDIAN
!PET STUDY (General) :=
!PET data type := Emission
applied corrections := {None}
!number format := float
!number of bytes per pixel := 4
number of dimensions := 4
matrix axis label [4] := segment
!matrix size [4] := 1
matrix axis label [3] := view
!matrix size [3] := 64
matrix axis label [2] := axial coordinate
!matrix size [2] := { 15}
matrix axis label [1] := tangential coordinate
!matrix size [1] := 90
minimum ring difference per segment := { -1}
maximum ring difference per segment := { 1}
Scanner parameters:=
Scanner type := Unknown
Number of rings := 8
Number of detectors per ring := 512
Inner ring diameter (cm) := 102
Average depth of interaction (cm) := 0.7
Distance between rings (cm) := 1.35
Default bin size (cm) := 0.3129
View offset (degrees) := 0
Maximum number of non-arc-corrected bins := 192
Default number of arc-corrected bins := 192
Number of blocks per bucket in transaxial direction := 1
Number of blocks per bucket in axial direction := 1
Number of crystals per block in axial direction := 1
Number of crystals per block in transaxial direction := 8
Number of detector layers := 1
Number of crystals per singles unit in axial direction := 1
Number of crystals per singles unit in transaxial direction := 8
end scanner parameters:=
effective central bin size (cm) := 0.317225
number of time frames := 1
!END OF INTERFILE :=
  • interfile文件格式:专门用于医学成像数据,包含文本头文件.hdr和二进制数据文件.img/.s。STIR的命名规范里是.hs.s
  • applied corrections := {None} - 应用的校正,这里没有应用任何校正
  • matrix axis label [4] := segment - 第四维的轴标签是“segment”(段)。
    • segment:表示环差相同的一组数据,例如环差为0表示的就是事件探测器在同一个环上,这些数据被组织成一个段