Patent ID: 11944845
Assignee: VARIAN MEDICAL SYSTEMS PARTICLE THERAPY GMBH & CO. KG
Field: Medical technology (Instruments)
Classification: CPC A  G  H | IPC A

Claim 0:
1. An asymmetric dual-mode ionization chamber measurement system comprising:
a high-voltage supply configured to generate a high-voltage potential;
an ionization chamber including
a readout plate,
a first high-voltage plate disposed to form a first active volume between the first high-voltage plate and the readout plate, and
a second high-voltage plate disposed to form a second active volume between the second high-voltage plate and the readout plate;

a switch matrix configured to selectively couple the high-voltage potential to the first high-voltage plate in a first mode, and couple the high-voltage potential to the second high-voltage plate in a second mode; and
an ion charge measurement circuit coupled to the readout plate, the ion charge measurement circuit configured to measure ions generated by a radiation stream passing through the first active volume in the first mode and to measure ions generated by the radiation stream passing through the second active volume in the second mode.