Some embodiments include a particle source, an RF power source, an
accelerator waveguide, and an imaging device. The particle source is to
generate a first injector current and a second injector current, the
first injector current being less than the second injector current. The
RF power source is to generate first RF power at a first pulse rate and
second RF power at a second pulse rate, the first pulse rate being
greater than the second pulse rate. The accelerator waveguide is to
accelerate a first electron beam based on the first injector current and
the first RF power and to accelerate a second electron beam based on the
second injector current and the second RF power, and the imaging device
is to acquire an image based on the first electron beam. The second
electron beam may be used to deliver treatment radiation to a patient.