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DICOM PS3.17 2020a - Explanatory Information​

 

Page 401​

DICOM​

Notations for Clinical Use with Traditional Charts​ Scales for statistics and graphical​

 

 

 

 

 

displays​

 

Decimal Visual Acuity​

 

Traditional scales​

 

Linear Scales​

 

 

Decimal​

US​

6 m​

 

LogMAR​

VAS​

1.60 E-01​

0.16​

20/125​

6/38​

0.80​

60​

 

1.50 E-01​

0.15​

20/130​

6/40​

0.82​

59​

 

1.45 E-01​

 

 

 

0.84​

58​

 

1.38 E-01​

 

 

 

0.86​

57​

 

1.30 E-01​

0.13​

20/150​

6/45​

0.88​

56​

 

1.25 E-01​

0.125​

20/160​

6/48​

0.90​

55​

 

1.20 E-01​

0.12​

20/170​

6/50​

0.92​

54​

 

1.15 E-01​

 

 

 

0.94​

53​

 

1.10 E-01​

 

 

 

0.96​

52​

 

1.05 E-01​

 

 

 

0.98​

51​

 

1.00 E-01​

0.1​

20/200​

6/60​

1.00​

50​

 

9.55 E-02​

 

 

 

1.02​

49​

 

9.00 E-02​

 

 

 

1.04​

48​

 

8.70 E-02​

 

 

 

1.06​

47​

 

8.30 E-02​

0.083​

20/240​

6/72​

1.08​

46​

 

8.00 E-02​

0.08​

20/250​

6/75​

1.10​

45​

 

7.50 E-02​

 

 

 

1.12​

44​

 

7.20 E-02​

 

 

 

1.14​

43​

 

7.00 E-02​

 

 

 

1.16​

42​

 

6.60 E-02​

0.065​

20/300​

6/90​

1.18​

41​

 

6.30 E-02​

0.063​

20/320​

6/95​

1.20​

40​

 

6.00 E-02​

0.06​

20/330​

6/100​

1.22​

39​

 

5.75 E-02​

 

 

 

1.24​

38​

 

5.50 E-02​

 

 

 

1.26​

37​

 

5.25 E-02​

 

 

 

1.28​

36​

 

5.00 E-02​

0.05​

20/400​

6/120​

1.30​

35​

 

4.80 E-02​

 

 

 

1.32​

34​

 

4.60 E-02​

 

 

 

1.34​

33​

 

4.40 E-02​

 

 

 

1.36​

32​

 

4.20 E-02​

 

 

 

1.38​

31​

 

4.00 E-02​

0.04​

20/500​

6/150​

1.40​

30​

 

3.80 E-02​

 

 

 

1.42​

29​

 

3.60 E-02​

 

 

 

1.44​

28​

 

3.50 E-02​

 

 

 

1.46​

27​

 

3.33 E-02​

 

 

 

1.48​

26​

 

3.20 E-02​

0.032​

20/630​

6/190​

1.50​

25​

 

3.02 E-02​

0.03​

20/650​

6/200​

1.52​

24​

 

2.90 E-02​

 

 

 

1.54​

23​

 

2.75 E-02​

 

 

 

1.56​

22​

 

- Standard -​

Page 402​

DICOM PS3.17 2020a - Explanatory Information​

 

 

DICOM​

Notations for Clinical Use with Traditional Charts​ Scales for statistics and graphical​

 

 

 

 

 

displays​

 

Decimal Visual Acuity​

 

Traditional scales​

 

Linear Scales​

 

 

Decimal​

US​

6 m​

 

LogMAR​

VAS​

2.63 E-02​

 

 

 

1.58​

21​

 

2.50 E-02​

0.025​

20/800​

6/240​

1.60​

20​

 

2.40 E-02​

 

 

 

1.62​

19​

 

2.30 E-02​

 

 

 

1.64​

18​

 

2.20 E-02​

 

 

 

1.66​

17​

 

2.10 E-02​

 

 

 

1.68​

16​

 

2.00 E-02​

0.02​

20/1000​

6/300​

1.70​

15​

 

1.90 E-02​

 

 

 

1.72​

14​

 

1.82 E-02​

 

 

 

1.74​

13​

 

1.74 E-02​

 

 

 

1.76​

12​

 

1.66 E-02​

 

 

 

1.78​

11​

 

1.60 E-02​

0.016​

20/1250​

6/380​

1.80​

10​

 

1.50 E-02​

0.015​

20/1300​

6/400​

1.82​

9​

 

1.45 E-02​

 

 

 

1.84​

8​

 

1.38 E-02​

 

 

 

1.86​

7​

 

1.30 E-02​

 

 

 

1.88​

6​

 

1.25 E-02​

0.0125​

20/1600​

6/480​

1.90​

5​

 

1.20 E-02​

 

 

 

1.92​

4​

 

1.15 E-02​

 

 

 

1.94​

3​

 

1.10 E-02​

 

 

 

1.96​

2​

 

1.05 E-02​

 

 

 

1.98​

1​

 

1.00 E-02​

0.01​

20/2000​

6/600​

2.00​

0​

 

RR.2.5 ETDRS Charts​

ETDRS charts feature Sloan letters with proportional spacing, 5 letters on each line, and a logarithmic progression of letter sizes with​ consistent increments of approximately 25% per line (10 lines equal a factor 10x). The ETDRS protocol specifies letter-by-letter​ scoring, viewing distance, illumination, use of different charts for right and left eye and other presentation parameters.​

The full ETDRS protocol requires a wide chart on a light box, and cannot be implemented on the limited screen of a projector (or​ similar)chart.Thelogarithmicprogression,however,canbeimplementedonanydevice.ThisprogressionwasfirstproposedbyJohn​ Green in 1868 and follows the standard "Preferred Numbers, ISO standard 3 (1973) " series and the rounding preferences.​

Use of ETDRS charts allows use of letter-by-letter scoring, which is more accurate than the line-by-line scoring used on traditional​ charts. Each row in the table is equivalent to 1 letter on an ETDRS chart (50 letters for a factor 10x). These steps are smaller than​ the just discernible difference; steps this small only become significant in statistical studies where a large number of measurements​ is averaged.​

The smaller steps for letter by letter scoring may be expressed in two ways; either by using suffixes to a familiar (sometimes slightly​ rounded)setofvaluesorbyusingcalculatedvalues.Forclinicalusesuffixeshavetheadvantageofusingonlyfamiliaracuitynotations​ and reverting to the nearest clinical notation when the suffix is omitted. Calculated values look less familiar; but are sometimes used​ in statistical studies. Note that suffixes used in the context of an ETDRS chart have a defined value and affect the DICOM storage​ value, whereas suffixes used in the context of traditional charts do not.​

- Standard -​

DICOM PS3.17 2020a - Explanatory Information​ Page 403​

Table RR-2. Reference Table for Use with ETDRS Charts or Equivalent​

DICOM​

 

Notations for Research Use with ETDRS Charts or Equivalent​

Scales for statistics​

 

 

 

 

 

 

 

and graphical displays​

Decimal Visual​

 

Use with suffixes​

Calculated values​

Linear Scales​

Acuity​

 

 

 

 

 

 

 

 

 

Decimal​ US​

6 m​

Decimal​

US​

6 m​

LogMAR​

VAS​

2.00 E+00​

2.0​

20/10​

6/3​

2.00​

20/10​

6/3.0​

-0.30​

115​

1.91 E+00​

-​

-​

-​

1.91​

20/10.5​

6/3.2​

-0.28​

114​

1.82 E+00​

- -​

- -​

- -​

1.82​

20/11​

6/3.3​

-0.26​

113​

1.74 E+00​

+ +​

+ +​

+ +​

1.74​

20/11.5​

6/3.5​

-0.24​

112​

1.66 E+00​

+​

+​

+​

1.66​

20/12​

6/3.6​

-0.22​

111​

1.60 E+00​

1.6​

20/12.5​

6/3.8​

1.58​

20/12.5​

6/3.8​

-0.20​

110​

1.50 E+00​

-​

-​

-​

1.51​

20/13​

6/4.0​

-0.18​

109​

1.45 E+00​

- -​

- -​

- -​

1.45​

20/14​

6/4.2​

-0.16​

108​

1.38 E+00​

+ +​

+ +​

+ +​

1.38​

20/14.5​

6/4.4​

-0.14​

107​

1.30 E+00​

+​

+​

+​

1.32​

20/15​

6/4.6​

-0.12​

106​

1.25 E+00​

1.25​

20/16​

6/4.8​

1.26​

20/16​

6/4.8​

-0.10​

105​

1.20 E+00​

-​

-​

-​

1.20​

20/17​

6/5.0​

-0.08​

104​

1.15 E+00​

- -​

- -​

- -​

1.15​

20/17.5​

6/5.2​

-0.06​

103​

1.10 E+00​

+ +​

+ +​

+ +​

1.10​

20/18​

6/5.5​

-0.04​

102​

1.05 E+00​

+​

+​

+​

1.05​

20/19​

6/5.8​

-0.02​

101​

1.00 E+00​

1.0​

20/20​

6/6​

1.00​

20/20​

6/6.0​

0​

100​

9.55 E-01​

-​

-​

-​

0.95​

20/21​

6/6.3​

0.02​

99​

9.00 E-01​

- -​

- -​

- -​

0.91​

20/22​

6/6.6​

0.04​

98​

8.70 E-01​

+ +​

+ +​

+ +​

0.87​

20/23​

6/6.9​

0.06​

97​

8.30 E-01​

+​

+​

+​

0.83​

20/24​

6/7.2​

0.08​

96​

8.00 E-01​

0.8​

20/25​

6/7.5​

0.79​

20/25​

6/7.5​

0.10​

95​

7.50 E-01​

-​

-​

-​

0.76​

20/26​

6/7.9​

0.12​

94​

7.20 E-01​

- -​

- -​

- -​

0.72​

20/28​

6/8.3​

0.14​

93​

7.00 E-01​

+ +​

+ +​

+ +​

0.69​

20/29​

6/8.7​

0.16​

92​

6.60 E-01​

+​

+​

+​

0.66​

20/30​

6/9.1​

0.18​

91​

6.30 E-01​

0.63​

20/32​

6/9.5​

0.63​

20/32​

6/9.5​

0.20​

90​

6.00 E-01​

-​

-​

-​

0.60​

20/33​

6/10.0​

0.22​

89​

5.75 E-01​

- -​

- -​

- -​

0.58​

20/35​

6/10.5​

0.24​

88​

5.50 E-01​

+ +​

+ +​

+ +​

0.55​

20/36​

6/11.0​

0.26​

87​

5.25 E-01​

+​

+​

+​

0.52​

20/38​

6/11.5​

0.28​

86​

5.00 E-01​

0.5​

20/40​

6/12​

0.50​

20/40​

6/12.0​

0.30​

85​

4.80 E-01​

-​

-​

-​

0.48​

20/42​

6/12.5​

0.32​

84​

4.57 E-01​

- -​

- -​

- -​

0.46​

20/44​

6/13.2​

0.34​

83​

4.37 E-01​

+ +​

+ +​

+ +​

0.24​

20/46​

6/13.8​

0.36​

82​

4.17 E-01​

+​

+​

+​

0.42​

20/48​

6/14.5​

0.38​

81​

4.00 E-01​

0.4​

20/50​

6/15​

0.40​

20/50​

6/15.1​

0.40​

80​

3.80 E-01​

-​

-​

-​

0.38​

20/52​

6/15.8​

0.42​

79​

- Standard -​

Page 404​

 

 

DICOM PS3.17 2020a - Explanatory Information​

 

 

DICOM​

Notations for Research Use with ETDRS Charts or Equivalent​

Scales for statistics​

 

 

 

 

 

 

 

and graphical displays​

Decimal Visual​

Use with suffixes​

Calculated values​

Linear Scales​

Acuity​

 

 

 

 

 

 

 

 

 

Decimal​ US​

6 m​

Decimal​

US​

6 m​

LogMAR​

VAS​

3.60 E-01​

- -​

- -​

- -​

0.36​

20/55​

6/16.6​

0.44​

78​

3.50 E-01​

+ +​

+ +​

+ +​

0.35​

20/58​

6/17.4​

0.46​

77​

3.33 E-01​

+​

+​

+​

0.33​

20/60​

6/18.2​

0.48​

76​

3.20 E-01​

0.32​

20/63​

6/19​

0.32​

20/63​

6/19.1​

0.50​

75​

3.00 E-01​

-​

-​

-​

0.30​

20/66​

6/20.​

0.52​

74​

2.90 E-01​

- -​

- -​

- -​

0.29​

20/69​

6/21​

0.54​

73​

2.75 E-01​

+ +​

+ +​

+ +​

0.28​

20/72​

6/22​

0.56​

72​

2.63 E-01​

+​

+​

+​

0.26​

20/76​

6/23​

0.58​

71​

2.50 E-01​

0.25​

20/80​

6/24​

0.25​

20/79​

6/24​

0.60​

70​

2.40 E-01​

-​

-​

-​

0.24​

20/83​

6/25​

0.62​

69​

2.30 E-01​

- -​

- -​

- -​

0.23​

20/87​

6/26​

0.64​

68​

2.20 E-01​

+ +​

+ +​

+ +​

0.22​

20/91​

6/28​

0.66​

67​

2.10 E-01​

+​

+​

+​

0.21​

20/95​

6/29​

0.68​

66​

2.00 E-01​

0.2​

20/100​

6/30​

0.20​

20/100​

6/30​

0.70​

65​

1.90 E-01​

-​

-​

-​

0.191​

20/105​

6/32​

0.72​

64​

1.82 E-01​

- -​

- -​

- -​

0.182​

20/110​

6/33​

0.74​

63​

1.74 E-01​

+ +​

+ +​

+ +​

0.174​

20/115​

6/35​

0.76​

62​

1.66 E-01​

+​

+​

+​

0.166​

20/120​

6/36​

0.78​

61​

1.60 E-01​

0.16​

20/125​

6/38​

0.158​

20/126​

6/38​

0.80​

60​

1.50 E-01​

-​

-​

-​

0.151​

20/132​

6/40​

0.82​

59​

1.45 E-01​

- -​

- -​

- -​

0.145​

20/138​

6/42​

0.84​

58​

1.38 E-01​

+ +​

+ +​

+ +​

0.138​

20/145​

6/44​

0.86​

57​

1.30 E-01​

+​

+​

+​

0.132​

20/151​

6/46​

0.88​

56​

1.25 E-01​

0.125​

20/160​

6/48​

0.126​

20/158​

6/48​

0.90​

55​

1.20 E-01​

-​

-​

-​

0.120​

20/166​

6/50​

0.92​

54​

1.15 E-01​

- -​

- -​

- -​

0.115​

20/174​

6/52​

0.94​

53​

1.10 E-01​

+ +​

+ +​

+ +​

0.110​

20/182​

6/55​

0.96​

52​

1.05 E-01​

+​

+​

+​

0.105​

20/191​

6/58​

0.98​

51​

1.00 E-01​

0.1​

20/200​

6/60​

0.100​

20/200​

6/60​

1.00​

50​

9.55 E-02​

-​

-​

-​

0.095​

20/210​

6/63​

1.02​

49​

9.00 E-02​

- -​

- -​

- -​

0.091​

20/220​

6/66​

1.04​

48​

8.70 E-02​

+ +​

+ +​

+ +​

0.087​

20/230​

6/69​

1.06​

47​

8.30 E-02​

+​

+​

+​

0.083​

20/240​

6/72​

1.08​

46​

8.00 E-02​

0.08​

20/250​

6/75​

0.079​

20/250​

6/76​

1.10​

45​

7.50 E-02​

-​

-​

-​

0.076​

20/260​

6/79​

1.12​

44​

7.20 E-02​

- -​

- -​

- -​

0.072​

20/280​

6/83​

1.14​

43​

7.00 E-02​

+ +​

+ +​

+ +​

0.069​

20/290​

6/87​

1.16​

42​

6.60 E-02​

+​

+​

+​

0.066​

20/300​

6/91​

1.18​

41​

- Standard -​

 

 

DICOM PS3.17 2020a - Explanatory Information​

 

Page 405​

DICOM​

Notations for Research Use with ETDRS Charts or Equivalent​

Scales for statistics​

 

 

 

 

 

 

 

and graphical displays​

Decimal Visual​

Use with suffixes​

Calculated values​

Linear Scales​

Acuity​

 

 

 

 

 

 

 

 

 

Decimal​ US​

6 m​

Decimal​

US​

6 m​

LogMAR​

VAS​

6.30 E-02​

0.063​

20/320​

6/95​

0.063​

20/315​

6/95​

1.20​

40​

6.00 E-02​

-​

-​

-​

0.060​

20/330​

6/100​

1.22​

39​

5.75 E-02​

- -​

- -​

- -​

0.058​

20/350​

6/105​

1.24​

38​

5.50 E-02​

+ +​

+ +​

+ +​

0.055​

20/360​

6/110​

1.26​

37​

5.25 E-02​

+​

+​

+​

0.052​

20/380​

6/115​

1.28​

36​

5.00 E-02​

0.05​

20/400​

6/120​

0.050​

20/400​

6/120​

1.30​

35​

4.80 E-02​

-​

-​

-​

0.048​

20/420​

6/126​

1.32​

34​

4.60 E-02​

- -​

- -​

- -​

0.046​

20/440​

6/132​

1.34​

33​

4.40 E-02​

+ +​

+ +​

+ +​

0.044​

20/460​

6/138​

1.36​

32​

4.20 E-02​

+​

+​

+​

0.042​

20/480​

6/145​

1.38​

31​

4.00 E-02​

0.04​

20/500​

6/150​

0.040​

20/500​

6/151​

1.40​

30​

3.80 E-02​

-​

-​

-​

0.038​

20/520​

6/158​

1.42​

29​

3.60 E-02​

- -​

- -​

- -​

0.036​

20/550​

6/166​

1.44​

28​

3.50 E-02​

+ +​

+ +​

+ +​

0.035​

20/575​

6/174​

1.46​

27​

3.33 E-02​

+​

+​

+​

0.033​

20/600​

6/182​

1.48​

26​

3.20 E-02​

0.032​

20/630​

6/190​

0.032​

20/630​

6/191​

1.50​

25​

3.02 E-02​

-​

-​

-​

0.030​

20/660​

6/200​

1.52​

24​

2.90 E-02​

- -​

- -​

- -​

0.029​

20/690​

6/210​

1.54​

23​

2.75 E-02​

+ +​

+ +​

+ +​

0.028​

20/720​

6/220​

1.56​

22​

2.63 E-02​

+​

+​

+​

0.026​

20/760​

6/230​

1.58​

21​

2.50 E-02​

0.025​

20/800​

6/240​

0.025​

20/800​

6/240​

1.60​

20​

2.40 E-02​

-​

-​

-​

0.024​

20/830​

6/250​

1.62​

19​

2.30 E-02​

- -​

- -​

- -​

0.023​

20/870​

6/260​

1.64​

18​

2.20 E-02​

+ +​

+ +​

+ +​

0.022​

20/910​

6/280​

1.66​

17​

2.10 E-02​

+​

+​

+​

0.021​

20/950​

6/290​

1.68​

16​

2.00 E-02​

0.020​

20/1000​

6/300​

0.0200​

20/1000​

6/300​

1.70​

15​

1.90 E-02​

-​

-​

-​

0.0191​

20/1050​

6/315​

1.72​

14​

1.82 E-02​

- -​

- -​

- -​

0.0182​

20/1100​

6/330​

1.74​

13​

1.74 E-02​

+ +​

+ +​

+ +​

0.0174​

20/1150​

6/350​

1.76​

12​

1.66 E-02​

+​

+​

+​

0.0166​

20/1200​

6/363​

1.78​

11​

1.60 E-02​

0.016​

20/1250​

6/380​

0.0158​

20/1250​

6/380​

1.80​

10​

1.50 E-02​

-​

-​

-​

0.0151​

20/1300​

6/400​

1.82​

9​

1.45 E-02​

- -​

- -​

- -​

0.0145​

20/1380​

6/420​

1.84​

8​

1.38 E-02​

+ +​

+ +​

+ +​

0.0138​

20/1450​

6/440​

1.86​

7​

1.30 E-02​

+​

+​

+​

0.0132​

20/1500​

6/460​

1.88​

6​

1.25 E-02​

0.0125​

20/1600​

6/480​

0.0126​

20/1600​

6/480​

1.90​

5​

1.20 E-02​

-​

-​

-​

0.0120​

20/1660​

6/500​

1.92​

4​

1.15 E-02​

- -​

- -​

- -​

0.0115​

20/1740​

6/520​

1.94​

3​

- Standard -​

Источник: https://studfile.net/preview/14585770/

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