Imaging systems for ionising radiation

Details Imaging systems for ionising radiation Imaging systems for ionising radiation

2006-09-13

2010-12-28

Song, Hoon (Department: 2882)

X-ray or gamma ray systems or devices

Specific application

Absorption

C378S097000

Reexamination Certificate

active

07860215

ABSTRACT:
Flat panel images obtained during concurrent radiotherapy typically suffer from artefacts that relate to the pulses of MV energy. For a radiotherapeutic apparatus comprising a pulsed source of therapeutic radiation, a detector comprising control circuitry, an array of pixel elements, each having a signal output and an ‘enable’ input and being arranged to release a signal via the signal output upon being triggered by the enable input, and an interpreter arranged to receive the signal outputs of the pixel elements, the interpreter having a reset control, there are advantages in the control circuitry being adapted to reset the interpreter after a pulse of therapeutic radiation, prior to enabling at least one pixel of the array. Alternatively, the control circuitry can prompt a plurality of pulses by the pulsed source and then enable a plurality of pixels of the array. In effect, the therapeutic pulses are grouped into a short flurry of pulses. It is therefore preferred that the plurality of pixels comprises substantially all the pixels of the array.

REFERENCES:
patent: 4365341 (1982-12-01), Lam
patent: 2004/0120452 (2004-06-01), Shapiro et al.
patent: 2005/0058237 (2005-03-01), Morf
patent: 1642528 (2006-04-01), None
patent: 9314418 (1993-07-01), None
PCT International Search Report, Dec. 8, 2006.

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