376 / 879
98
99
100
101
0
50
100
150
200
250
Moyenne par patient du %de points ayant un gamma <
1
Date
ORL P1 IUPESM
0,0
0,4
0,8
1,2
1,6
2,0
2,4
2,8
0
50
100
150
200
250
ORL P1 IUPESM
95
96
97
98
99
100
0
50
100
150
200
250
Moyenneparpatient du%depointsayantun gamma<1
Date
ORL P1 IUPESM
N
°
contrôle
40
Homogenous data
:
Statistically representative
✓
changes on the process
(
special cause)
✓
Outliers removed
Importance of the choice of
data to calculate the limits
Normal distribution
(
risk = 0.27%)
•
In daily practice at ICL
:
-
Head-and-neck treatments -
5. IMRT QC results (portal dosimetry) monitored with SPC
Moving-Range (%)
Individual value. (%)
EWMA (%)
S
TANDARDIZE
03/10/17