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