A method for the inter-calibration of a matrix of sensors.
We present a quick and easy method for the calibration of a matrix of sensors. The algorithm is based on a three-step irradiation procedure which relies only on the constancy of the delivered fluence at each step. With this method the gain of each sensor is derived relative to a reference detector. The algorithm has been applied to a matrix of (32 x 32) ionization chambers. After the calibration coefficients have been applied, by comparing the response of the matrix of chambers to a reference detector over a large field, we determined that the fluence measurement of individual chambers is better than 0.7%. The algorithm solves the cumbersome problem of the relative gain calibration of a matrix of a large number of sensors.
Donetti
M
M
Fondazione CNAO, Via Caminadella 16, I-20123, Milano, Italy. INFN, Via P Giuria 1, I-10125 Torino, Italy.
Garelli
E
E
Marchetto
F
F
Boriano
A
A
Bourhaleb
F
F
Cirio
R
R
Cornelius
I
I
Giordanengo
S
S
La Rosa
A
A
Nastasi
U
U
Peroni
C
C
D000465:Algorithms; D002138:Calibration; D015233:Models, Statistical; D019047:Phantoms, Imaging; D011874:Radiometry; D011879:Radiotherapy Dosage; D050397:Radiotherapy, Intensity-Modulated / Q000295:instrumentation / Q000379:methods*; D015203:Reproducibility of Results; D014159:Transducers; D014867:Water
D014867:Water