Skip to main content

Table 2 Target volumes coverage for plans based on either lymphoscintigraphy (LS) volumes or international guidelines (IG) ones

From: SPECT/CT lymphoscintigraphy of sentinel node(s) for superselective prophylactic irradiation of the neck in cN0 head and neck cancer patients: a prospective phase I feasibility study

Patient #

1

2

3

4

5

6

7

8

9

10

Median

P-value

CTVn-LS doses (%)

            

D95%

100.2

103.7

100.0

99.2

100.9

102.9

99.8

98.9

99.8

99.5

99.91

0.232

D98%

98.7

102.2

98.9

96.6

99.8

101.7

99.3

98.4

99.3

98.6

99.10

0.284

Dmean

111.4

113.9

117.7

107.1

118.7

115.0

107.4

108.5

107.2

108.3

109.91

0.006

PTVn-LS doses (%)

            

D95%

98.7

100.5

98.4

90.9

100.4

101.5

98.7

98.7

99.1

98.9

98.83

0.059

D98%

97.5

97.5

88.5

80.0

99.1

100.2

96.9

98.2

98.4

98.2

97.84

0.185

Dmean

111.0

111.8

114.2

102.9

117.1

114.1

106.1

108.5

106.3

106.8

109.73

0.006

CTVn-IG doses (%)

            

D95%

98.2

99.5

100.0

97.8

100.9

101.2

100.5

99.6

99.3

100.2

99.82

-

D98%

96.6

98.3

99.3

96.5

99.3

100.2

99.8

98.7

98.6

99.5

99.01

-

Dmean

110.1

107.1

110.8

105.5

112.4

109.6

106.3

105.8

104.7

106.5

106.77

-

PTVn-IG doses (%)

            

D95%

96.6

96.5

98.7

90.4

98.9

99.2

98.6

98.9

98.7

99.1

98.74

-

D98%

88.1

94.1

95.1

82.0

96.6

97.3

95.5

98.0

98.0

97.3

96.04

-

Dmean

109.2

105.2

108.6

101.8

111.0

108.4

105.2

105.4

104.3

104.7

105.32

-

  1. CTVn = prophylactic nodes clinical target volume; PTVn = prophylactic nodes planning target volume; D95% = dose received by 95% of the volume; D98% = dose received by 98% of the volume; Dmean = mean dose.
  2. P-values for statistical differences for LS values compared to IG ones are reported in last column; level of significance is set at 0.05.