Quality Management 2017
S TANDARDIZE
5. IMRT QC results (portal dosimetry) monitored with SPC
- Head-and-neck treatments -
ORL P1 IUPESM N ° contrôle
100
• In daily practice at ICL :
99
98
Importance of the choice of data to calculate the limits
97
96
95
98 Moving-Range (%) Individual value. (%) EWMA (%) 99 100 101 0 0,4 0,8 1,2 1,6 2,0 2,4 2,8 0 Moyenneparpatient du%depointsayantun gamma<1
ORL P1 IUPESM 100
50
150
200
250
Homogenous data :
Date
✓ changes on the process ( special cause) ✓ Outliers removed
1
Statistically representative
ORL P1 IUPESM
50
100
150
200
250
Moyenne par patient du %de points ayant un gamma <
Date
Normal distribution ( risk = 0.27%)
03/10/17
0,0
40
0
50
100
150
200
250
Made with FlippingBook - Online Brochure Maker