CT??????? - PowerPoint PPT Presentation

1 / 126
About This Presentation
Title:

CT???????

Description:

Title: Author: xjn Last modified by: .CN Created Date: 4/7/2002 10:12:07 AM Document presentation format: – PowerPoint PPT presentation

Number of Views:46
Avg rating:3.0/5.0
Slides: 127
Provided by: xjn
Category:
Tags: msct

less

Transcript and Presenter's Notes

Title: CT???????


1
CT???????
  • ????
  • ??? CT??????
  • ??? CT??????
  • ??? ??CT????????
  • ??? CT???????
  • ??? ?????CT????

2
??????????
????????? ??????? ??? 2003.11?1?
????????? ??????? ??? 2002.02?1?
?????????????? ????????? ??? ??? 2000.01?1?
????????-CT???? ????????? ?? ?? 2000.05?1?
3
  • ??? CT??????
  • ??CT???
  • CT(Computed Tomography)??????????,??X?CT?
  • X??????,CT?????????

4
?1917?Radon????????????? ? 1971??????Hounsfield??
???????CT? ? 1972?????? ? 1974?,?????Ledley?????CT
?. ?Hounsfield???????Cormark???1979????????????
Hounsfield?2004?8?12??????,??84?
5
  • ??CT?????
  • (?)????
  • CT????????????X??????????????X????????????
    ????????????X???????? ?????????
    A/D????????????????????????????X????,????????????D
    /A?????????????????????????????????CT???

6
(No Transcript)
7
  • (?)CT????????
  • 1.CT? (CT number)
  • X??????,???????????????????µ,??????????,??CT??
  • CT?((µ??-µ?)/µ?)K
  • K?????(??1000),?CT?????HU(Hounsfield Unit)
  • CT??????????,?????????????????????1,?????2,????0(?
    ??0.0013),??CT??0HU,???-10001000??2001??????CT??
    ???

8
(No Transcript)
9
  • 2.??(matrix)
  • ?CT???,????????????,???,????????,????????,??
    ????,512512?10241024?????
  • ??????????????X??????????,??????????????????????
    ?????
  • 3.??(voxel)
  • CT????????????(?1mm?5mm?10mm)????,??????????
    ???????????,???????????
  • ??????,??????µ?????

10
  • 4.??(pixel)
  • ??CT????????????????,??????????????????????,
    ??????????,????????????????????????µ?????,??CT????
    ??????????????,????????,???????

11
  • 5.?? (grey scale)
  • CT????????????????D/A??????????????????,????
    ???????????,???????16?,????4????????,??64????????,
    ?CT??-10001000???,?????????31????CT??
  • 6.????(windows technology)
  • ?????????????,???????????????,?????????,????
    ?????????(????),??????????????????,??????????,????
    ????????

12
  • (1)??(windows width,WW)
  • ????????????16????CT?????
  • ??????CT??????,?????????,????,???????CT?????,?????
    ?????????,?????WW(80100)?????,???????CT?????,????
    ??,?????,?????????????,?????WW?13001800?

13
  • (2)?? (windows level,WL)
  • ?????????CT??????
  • ??????CT?????,WL?????????,?????????????
  • ????WL350??
  • ????WL -650??
  • ??????WL40??

14
????
??
(1500,350)
(90,40)
???
??
(1600,-650)
(300,40)
15
  • (?)CT?????
  • ????????????????????????????
  • 1.????
  • ?X????????????,???????
  • ???????X???????????????A/D???????

16
  • 2.????
  • (1)??X??????(???)
  • X????????????????,??????,?????????????,?????
    ?????????????,X??????,??????X????????
  • ???????????????,?????????????A/D????????

17
  • (2)?????????????????,??????????,??????,??????????
    ??
  • (3)??????????????????????????????????,??X????????
    ??,?????????????????,??????,????????,?????????????
    ??,??????CT???-1000?
  • (4)???????????????????????????

18
  • 3.????
  • ??????????????µ1?µ2?µn,????????????????????
  • ??????????????,????????????????,???????????,
    ??????????????????????????????,??????????????????
    ??
  • 4.??????????
  • ??????????????,???????????????,?????????????
    ??,?????CT???

19
  • ??CT???????
  • (?)????
  • 1.????X???????????,??????
  • 2.X??????????X??, ??? ?
  • 3.??????????????????????????????????
  • 4.???????????,??X????????
  • 5.??????????????,????????
  • ???????,??????
  • 6.?/????(A/D)
  • 7.?????
  • 8.?????
  • 9.???????CT????????????
  • 10.????????????????

20
  • (?)????
  • CT????????????????Unix?Linux??????
  • 1.??????
  • ??????????????????????????
  • 2.??????
  • ???????????????(????????????????????)???????
    ??(??????????????)?????????

21
  • ??CT??????
  • ???????????????????????????????????
  • ???CT
  • (?)??CT??????

22
  • (?)???????CT
  • 1.????
  • ??CT?X??-????-?????
  • 1985?,????(Toshiba)
  • ???????????????,??????????????,??????
  • ????????????????????????,?X?????????,????,????,?
    ????

23
  • 2.??CT (helical CT)
  • ??CT??????????,X?????????????,??????????Z???
    ??,??????????????CT???????,???????????,???????????
    ??????????????
  • ??CT????????(volumetric scanning)?
  • ??X???????????,??CT????????,????CT?,???????
    ????????????

24
  • (1)??CT?????
  • ???(Helical Pitch)???X????????,????0?,?????CT??
    ????0.5?,X??????2?????1?,X??????1?????2?,X??????
    ??,????,?????????????,???????
  • ?????(reconstruction interval)???????????????????
    ???????,??????????????,?????????????????
  • (2)??CT???
  • ?????????????????
  • ??????????????,??????
  • ??????????????
  • ????????,???????????

25
  • 3.????CT
  • (Multi Slice Helical CT,MSCT)
  • 1991?,????Elscint?????????CT,?????????CT????
    ?,1998???RSNA???, Siemens?GE?Marconi(Picker)?Toshi
    ba????????????4????????????CT,???????CT(Multi
    Detector Row CT,MDCT)?

26
(No Transcript)
27
(No Transcript)
28
(No Transcript)
29
(No Transcript)
30
(No Transcript)
31
  • (1)????CT?????CT???
  • ?????????????CT?Z???????????,MSCT??4??????????
  • ?X???????????????X??????(fan-beam),X??????????MSC
    T????????????(cone-beam),????????????,???X??????
  • ??????????????Z??????????????,MSCT????????4?,????
    ???4??????
  • ?????????????????????

32
  • ??????????????????????X????????,?????????,???????
    ?????X?????,??????????????,???10mm??X??,???4?1.25m
    m???????5mm?????,??2?5mm?????,?????2?1.25mm???????
    2.5mm?????,??4?2.5mm??????
  • ?????????????,????????,??????,??????
  • ?MSCT???????????SSCT

33
  • (2)????CT?????
  • ?X??????????
  • ??????????????????
  • ?????????????
  • ?????? ????????,MSCT??????????????,???????,??????
    ??
  • ??????????????????,????99??,??????????Z?????????
    ??

34
  • (3)????CT???
  • ???????????????
  • ?????????????
  • ?????????,?????30??????
  • ??????????
  • ?X????????
  • ????????????????
  • ?????????????
  • ???CT???????
  • ????CT???

35
  • (?)???CT
  • ?????CT???????X?????,???????????????????????
    ,???,????X??????,????????,?????????????,??????????
    ????30100ms,??????????2???,4?????8???,????????CT?
    ???????

36
  • ??CT?????????
  • (?)??????
  • 1.??
  • ?1822????
  • 2.??
  • ??????4065???
  • 3.??

37
  • (?)CT??????
  • 1.????????????,??????????,???????
  • 2.??????????????
  • 3.????????????
  • 4.????????????????,????????????,??????????,???????
  • 5.??????????????2??????????,???????X????,???X??,?X
    ???????????,????????X??????
  • 6.?????????
  • 7.?????????????????

38
  • ??CT????????
  • 1.??(field of view,FOV)
  • (1)????(SFOV)1850cm????????
  • (2)????(DFOV)?????????????????????,????????
  • 2.????
  • 3.??????
  • 4.X?????
  • 5.X????
  • 6.???
  • 7.????????,????????????,?????,??????,???????

39
  • 8.????
  • ???????????????(??CT)?X???????????(??CT),???
    ?????????0.37?(???64?) ?
  • 9.???????????????
  • 10.????
  • (1)????
  • (2)?????????????????
  • (3)?????????????????????????,??????????,??????,??
    ????
  • 11.??(slice thickness)?????,??????????,??????????
    ????,???????X??????,??????????
  • 12. ??(slice gap)????????????????

40
  • ??CT???????
  • 1.??
  • (1)????????????????????,??????????
  • (2)?????????
  • (3)????????
  • 2.???
  • (1)???????X???,??????????CT?????????
  • (2)CT??????????????????????,??????????????????????
    ???
  • (3)CT??????????????,??????????????
  • (4)??????????????CT??????????????,??????????????

41
??? CT??????
  • ??CT???????
  • 1.?????
  • 2.?????
  • 3.?????????????????????CT?????,?????????????????
    ???????????????
  • 4.??????????
  • 5.??????????
  • 6.???????

42
  • ????????????
  • 1.???????????????,???????????
  • 2.????????????,???????
  • 3.????????,????????,????????????????????????????
  • 4.?????,???6????,???20?????????
  • 5.?????,????????????,??????????
  • 6.???????????????????,??????????

43
  • ??CT??????
  • 1.??
  • 2.X????
  • 3.??????????????????????,?????????????,??????????
    ????,???????????????
  • 4.??????
  • 5.??????????,?????
  • 6.???????????,??CT??
  • ?????

44
  • ????CT?????
  • 1.???????,???????????
  • 2.??????????,??CT???????????????????????
  • 3.????????,??????????????,????????????
  • 4.??????,????????????????,???????????????????????
    ??????????????????????????,?kV?mA??????????(??????
    ???)????????????????????????
  • 5.????,?????????????????????????(?????????)??????
    ??????????????,?????????????????????????

45
  • 6.?????????,?????????????,?????????????
  • 7.????,??????
  • 8.????????,???????????????????
  • 9.??????????????,??????,??????,?????CT???
  • 10.??????,????CT?????????????????????,?CD??????(MO
    D)?????,??????????????

46
  • ??CT???????
  • 1.????(??)
  • ??????????,???????????????CT,?????,???X????
    ???,??????/???????
  • 2.????
  • ???????????,?????????????????(???),?????????
    ??????????????,X??????????(???)??,?????,???????/??
    ???????(0)??????(90)
  • 3.?????(??)
  • ?X?????????????,????????????????,???,???????
    ??,??????????????

47
  • 4.???? (overlap scanning)
  • ??????????????,??????????????????,????,??CT?
    ??????????????,??????????
  • 5.???? (thin slice scanning)
  • ????5mm???
  • 6.??????
  • ?????????????,?????????
  • 7.?????? (high resolution CT,HRCT)
  • ????3mm??????????????,???????????????,?????
    ??,???????
  • 8.????
  • ???????????????????????????????,????????????
    ??????????

48
  • 9.????(???,target scanning)
  • ????????????????????????,??,????????????????
    ??,????????????
  • 10.???? (contrast scanning)
  • ????????????
  • 11.??????
  • ?????????,?????????????,??????????????CT????
    ???????????
  • 12.???? (dynamic scanning)
  • ???????????????????????????????,????????,???
    ?????????????????????,????????,??????????????

49
  • 13.???? (delayed scanning)
  • ???????,?????(????,?????)???????????????,???
    ????,?????????????????310????????????
  • 14.??????
  • ?????????????????CT??,????????,??????????,??
    ???????????
  • 15.??????
  • ??CT??????????,???????????????????,?????????
    ??????????,?????????
  • 16.???????
  • ???????????,??????????????

50
  • ????????
  • (?)???????
  • ???????,??????X??????,??CT?????????,????????
    ???????????????????????
  • (?)CT?????(???)
  • CT???????????????????????????????????,??????
    ??????

51
  • 1.??????
  • ?????????????????,?????????????,????????????
    ?????????????????????
  • 2.??????
  • ??4050ml,?????????1.11.4ml/kg?
  • 3.????
  • (1)??????????(???)????????2.54.0ml/s???????,????
    ,????????????????
  • (2)??????????
  • (3)???????-???
  • (4)??-????????
  • (5)?????

52
  • (?)????CT??(CTM)
  • CTM??????????,????????????????????????24030
    0 mg/mL????1015mL,?????????10?,46????CT?????
  • ???????MR???

53
  • ??CT?????????????
  • (?)CT?????
  • 1.????????
  • ??????????????????????????????????CT??,?????
    ????,????????????,??????CT??,????????????????,WW?1
    500?WL?-650,???????????????????,WW?300?WL?40?

54
  • 2.??????
  • ?????????????,????????????????????,?????????
    ?,???????,???????,???????
  • 3.?????
  • CT???????
  • ??????????????,?????????????,???CT??????????
    ?,?????????????,?????????????,???????????????????
  • 4.??????
  • ????????????????????????????????????,??????
    ?????,?????????

55
  • (?)??????
  • 1.CT???? (?????????)
  • ??????
  • (1)???????????,?????????????????
  • (2)?????????????,?????
  • (3)??????????,????????????,??????????
  • (4)??????????,???????????????
  • 2.???????
  • ?????????,????????????????????????,?????????
    ??????,??????????,????????(??????)/2?

56
  • (?)CT??????
  • 1.???????,??????????
  • 2.????(?????)?????
  • 3.?????,?????,????????????????
  • 4.????????????,??????????????????
  • 5.???????,?????????
  • 6.????????,?????CT????????????

57
  • ??? ??CT????????
  • (P56)
  • ??CT????????????????????????????????????,???
    ???????,?????????????????,???????????????????????

58
  • ???????( MPR,Multiple planar Reconstruction)
  • ??????????,????????????????,?????????????,?
    ???CT???????????????????????????????????

59
  • ????????
  • (3D Surface Reconstruction)
  • ???????????????(SSD),????????(CT?)?????????????
    ?????????????3D??????????,???????????
  • ????????????????????????????,???????????????
    ??????,????????????????????????????

60
(No Transcript)
61
????????(MIP,Maximum Intensity Projection)
  • ??????????????????????,MIP?????????X????,???
    ????????????,?????????????????????

62
  • ???????(VE, Virtual Endoscopy )
  • ?????????????????,?????????????????????
  • ??????,??????????????,??????????????????????
    ????????????????????,????????????
  • VE?????????????????????????????

63
  • ??? CT???????
  • (P58)
  • ????CT???????
  • 1.?????(spatial resolution)(??????,high contrast
    resolution)
  • ??????????????,???????(????)?????,???????,??
    ?/??(LP/cm)???/??(mm/mm)?

64
  • ?????????????
  • (1)????????????(???)???????????????,??????CT?????
    ??????,Z???????,???????????
  • (2)?????????????,???????,????????
  • (3)????
  • (4)??????????/???????????,????????
  • (5)???????????????
  • ??CT?????????15LP/cm,????30LP/cm,?X?????????
    ?-???,????????10LP/mm,??,CT???????????X????

65
  • 2.????? (??????) ( contrast resolution )
  • (??????, low contrast resolution )
  • ???????????,??????????????0.5,????????????0
    .5?,CT?????????
  • ?????????????
  • (1)?????????????????????X??????,?????????,??????,
    ??????,?????????
  • (2)??????????,??????????????
  • 3.?????
  • ???????????????????????,????X????????

66
  • 4.??
  • ???????,?CT??????,????????,?????????,???????
    ?????????????????????????
  • ??????X??????,????????????????,?????????????
    ???????????X????
  • ????????????????,???????CT??????
  • ????????
  • (1)X????(2)???????(3)?????(4)???(5)??????????

67
  • 5.?? (artifact)
  • ???????????????????????????????????
  • ????????
  • (1)??????????????????????,?????????????????????
  • (2)?????????????,???????????????????
  • (3)????????????????????????????????????,?????????
    ????????

68
  • 6.?????? (partial volume effect)
  • ??????????????????CT?????,?????????????CT?,?
    ??????????????,?CT???,???????????????,?CT???,?????
    ????????
  • ?????????????,???????????????
  • 7.?????? (peripheral space phenomenon)
  • ????????????,?????????CT????,?????????????
  • ???????CT???,???????CT????

69
  • ????????????
  • 1.mA?s???
  • 2.kV???
  • 3.FOV???
  • 4.????????????????
  • 5.???????
  • ??????????

70
  • ??? ?????CT????
  • ????CT??
  • (?)???
  • 1.?????(???????)
  • 2.????
  • 3.????(????)
  • 4.???(????)
  • 5.????(????)
  • 6.??????????????
  • 7. ?????(?????)

71
  • (?)????
  • 1.?????????,???????,?????(??)???????
  • 2.?????????????????,???????????????
  • 3.??????????????,?????????
  • 4.???,??????????
  • 5.??????,????????????

72
  • (?)????
  • 1.??????(????)
  • (1)????????????,??????????????????????????,??????
    ?,????,???????????????,?????????,???X?????????????
    ????
  • ??????????????????
  • ??????????????,???????????????
  • (2)??????????????,????????

73
(No Transcript)
74
???????????????
75
  • ?????????????????????????????????
  • ??????????????CT??????

76
  • 2.???????
  • ?????????????????CT????????
  • (1)???X??????????(?????)??????????????????,??????
    ????????(???)???(???)??????,??????????
  • (2)?????????(90?)???,??????????????
  • ????????????????????????????????

77
(No Transcript)
78
  • 3.??????
  • (1)???????????,???????????????????????,?????????
    ????????????????????????(??????????),????????,???
    ?????????,???????????
  • (2)????????1.52.0mL/s?
  • (3)?????????4050mL?
  • (4)??25s,????????????,??25s???????
  • (5)????????????????,????????43?????????????(5mm?3
    mm)???

79
(No Transcript)
80
  • 4.?????????
  • (1)?????????,????????????,????,???????12?
  • (2)????????1.52.0mL/s?
  • (3)?????????4050mL?
  • (4)??20s?
  • (5)????????????,???????2.5cm??????????
  • ????????????,??????

81
(No Transcript)
82
  • 5.??CTA
  • (1)????????2.53.0mL/s?
  • (2)?????????1.21.5mL/kg?
  • (3)??18s?
  • (4)????????????????????,??????,??????????????
  • ?????CT???CTA???

83
(No Transcript)
84
  • ???????CT??
  • (?)???
  • 1.???????????????,????(????????????)?
  • 2.??????,??,??,??????
  • 3.???????????????????
  • 4.??????(???????)?
  • 5.????????,???????
  • 6.??????????????????????
  • 7.??????????
  • 8.?????,?????(?????????),?????,???????

85
  • (?)????
  • 1.??????,?????????????????????
  • 2.???????????????,??????????????????
  • 3.?????????????
  • 4.?????????????,???????
  • 5.?????,????????,??????????,??????????,??????,????
    ????????

86
  • (?)????
  • 1.?????????
  • (1)?? ?????????
  • (2)????????????,?????????????,????????

87
(No Transcript)
88
  • 2.??????????
  • (1)????????
  • (2)????????????,??????????????

89
(No Transcript)
90
  • 3.????????
  • (1)??????????,???????,???????,??????????????????
    ???????????,????????????,????????????
  • (2)????????2.02.5mL/s?
  • (3)?????????1.0mL/kg?
  • (4)??25s?
  • (5)????????43???

91
  • 4.?????????
  • (1)?? ?????????
  • (2)????????????,?????????????,????????

92
  • 5.??????????
  • (1)????????
  • (2)????????????,??????????????

93
  • 6.???????
  • (1)?? ?????????
  • (2)??????????????,????????(?????)?

94
  • 7.????????
  • (1)????????
  • (2)????????????,??????????????

95
(No Transcript)
96
  • 8.????
  • ?????????,?????????
  • (1)????????
  • (2)????????????,??????????????

97
  • 9.?????
  • ????????????????,???????????1.5cm,????????10
    ??
  • 10.????
  • ???????????????,???????????????????????

98
  • 11.??????
  • (1)????????
  • (2)????????????,??????????????

99
  • 12.????
  • ????????????
  • ?????????????,
  • ????
  • ??????????11.5mm?
  • ??????????????
  • 13.????
  • (1)?? ????????
  • (2)????????????,?????????????

100
  • ????????????????,???????????(?????????),?????????
    ???????????
  • ????????????????

101
  • 14.?????
  • ???????,????
  • ????????????????
  • ??????????5mm?
  • ????????????,?????????
  • 15.??????
  • ????????

102
  • ????CT??
  • (?)???
  • 1.????????????????????????????,???????????????
  • 2.????????????????????
  • 3.?????????????????,??????????
  • 4.??????????,???????
  • 5.????????????????????
  • 6.???????????????????,???????????????????????????
    ?
  • 7.????

103
  • (?)????
  • 1.????????????
  • 2.????????,???????,?????
  • 3.??????????,?????????1??????(????????),????????,
    ?????????????
  • 4.?????CT,?????????

104
  • (?)????
  • 1.????
  • (1)?? ??????????,???????????,???????????????
  • (2)????????????,???????????????,????????????5cm??
    ????

105
  • ??????????????????
  • ??????,??????????????,???????5?3mm?
  • ??????????,???????????????,?1.02.0mm,???kV???140,
    mAs???230300?
  • ???CT????CT,????????!

106
  • 2.??????
  • (1)??????????????????????????????????????????????
    ???????????????????????,??????????????????????????
    ?????????
  • (2)????????2.53.0mL/s?
  • (3)??????1.31.5mL/kg?
  • (4)??25s?
  • (5)????????????,??????????????????????????,??????
    ??????????????????????,???????20?,?????3.0mL/s?

107
(No Transcript)
108
  • ????CT??
  • (?)???
  • 1.?? 2.?? 3.?? 4.??
  • 5.????????? 6.??????????
  • (?)????
  • 1.???23?,?????,?????????
  • 2.???????????????
  • 3.???????
  • 4.????????????
  • 5.??1??????500mL
  • 6.?????????
  • 7.?????CT,?????????

109
  • (?)????
  • 1.???????????
  • (1)?? ??????????,?????????,???????????????
  • (2)????????????,????????????,????????????5cm????

110
  • ?
  • ?????????????????
  • ???????,???????5mm,????mAs,???????1.5cm?
  • ???????,???????5mm,????mAs,???????2cm,?????(???2cm
    )??????
  • ???CT????CT,??????????????!

111
  • 2.???????????
  • (1)??????????????????????????????????????????????
    ??????
  • (2)????????2.53.0mL/s?
  • (3)??????1.21.5mL/kg?
  • (4)??25s,65s?
  • ????????????????????????,??????(25??60-65?)?
  • ???????????,?????1.01.5mL/s,??????,????????70
    90s?

112
(No Transcript)
113
  • 3.????????
  • (1)?? ???
  • (2)??????????
  • (3)?????????????????,????????????????????,???11??
    ???????,?????????????,??????????????????11????????
    ??????????????????23mm?

114
  • 4.??????????
  • (1)?????????????????
  • (2)????????2.53.0mL/s?
  • (3)??????1.21.5mL/kg?
  • (4)??25s?65s?

115
5.??CTA
116
  • ????CT??
  • (?)???
  • ??????????????????????
  • (?)????
  • 1.???3?,?????,?????????
  • 2.????????????
  • 3.???56??????1???1000mL,????????????,?????1.5???
    ?300mL,???????????????
  • 4.????????????
  • 5.????????????,????????

117
  • (?)????
  • 1.????
  • (1)?? ??????????,???????????,???????????
  • (2)????????????,???????????????,????????????5cm??
    ????10cm?
  • ?
  • ?????????35mm???,????
  • ?????????,??????????

118
(No Transcript)
119
  • 2.????????
  • ???????????,??????????????5mm???????????????1
    cm??????????????????????????????????

120
  • ????CT??
  • ???
  • 1.????????????????
  • 2.?????
  • 3.?????
  • 4.?????,????????????

121
  • (?)????
  • 1.????
  • (1)?? ??????????,????????????????
  • (2)????????????,????????????,???????????????????,
    ???????,????C4C6?C5C7?
  • ?????????,??????????,?????????????

122
(No Transcript)
123
  • 2.????
  • 3.?3?1????? (???????)
  • (1)?? ??????????,????????????
  • (2)????????????,????????????,????????????10cm????
    20cm,?????????5cm?
  • (3)?3?(3????)??,??4?,???????5mm,??????????????????
  • 3.??????
  • 4.??????????

124
(No Transcript)
125
???????CT?? (?)??? ?????????? (?)????
?????
  • (1)?? ??????????,???????????,???????????
  • (2)????????????,?????????????

126
????? 1.??CT?????? 2.???????CT???????
Write a Comment
User Comments (0)
About PowerShow.com