title: A method for the inter-calibration of a matrix of sensors.
abstract: 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.
authors.affiliation: Fondazione CNAO, Via Caminadella 16, I-20123, Milano, Italy. INFN, Via P Giuria 1, I-10125 Torino, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Donetti
authors.forename: E
authors.initials: E
authors.lastname: Garelli
authors.forename: F
authors.initials: F
authors.lastname: Marchetto
authors.forename: A
authors.initials: A
authors.lastname: Boriano
authors.forename: F
authors.initials: F
authors.lastname: Bourhaleb
authors.forename: R
authors.initials: R
authors.lastname: Cirio
authors.forename: I
authors.initials: I
authors.lastname: Cornelius
authors.forename: S
authors.initials: S
authors.lastname: Giordanengo
authors.forename: A
authors.initials: A
authors.lastname: La Rosa
authors.forename: U
authors.initials: U
authors.lastname: Nastasi
authors.forename: C
authors.initials: C
authors.lastname: Peroni
mesh_terms: 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
chemical_list: D014867:Water