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X-ray target for radiation therapy and disgnostic imaging

IP.com Disclosure Number: IPCOM000012469D
Publication Date: 2003-May-08
Document File: 3 page(s) / 80K

Publishing Venue

The IP.com Prior Art Database

Related People

Ken Witham: INVENTOR [+2]

Abstract

This invention improves upon the one disclosed in Bertsche's 'X-RAY TARGET ASSEMBLY AND ROTATION THERAPY SYSTEMS AND METHODS'. Bertsche's invention discloses a spinning target made from two different materials, one that generates MeV photons for cancer treatment and the other that generates keV photons for diagnostic images. Bertsche's invention also discloses a method for detecting the rotational position of the spinning target by evaluating and comparing the contrast level of images received from the spinning target. This invention provides an improved method for detecting the rotational position of the spinning target, which is advantageous over Bertsche's in that the control system will not have to derive the rotational position after obtaining images. More importantly, this invention provides a signal to trigger the system so that beam pulses can be placed preferentially on the high Z or low Z portions of the target.

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Ref. No. 2002E18835US

SUPPLEMENTAL SHEET FOR INVENTION DISCLOSURE

BACKGROUND INFORMATION

This invention improves upon the one disclosed in Bertsche's 'X-RAY TARGET ASSEMBLY AND ROTATION THERAPY SYSTEMS AND METHODS'. Bertsche's invention discloses a spinning target made from two different materials, one that generates MeV photons for cancer treatment and the other that generates keV photons for diagnostic images. Bertsche's invention also discloses a method for detecting the rotational position of the spinning target by evaluating and comparing the contrast level of images received from the spinning target.

This invention provides an improved method for detecting the rotational position of the spinning target, which is advantageous over Bertsche's in that the control system will not have to derive the rotational position after obtaining images.

More importantly, this invention provides a signal to trigger the system so that beam pulses can be placed preferentially on the high Z or low Z portions of the target.

DETAILED DESCRIPTION

The spinning target, nominally rotating at 1500 rpm, will have rotating features (such as magnets) that can be detected by a pickup (such as a coil) as shown in the figure.

The main advantage of this over Bertsche is in terms of processing speed and image accuracy. With Ber1sche's method the images are collected (cpu time) and subtracted (accuracy) to infer keY images from MeY ones. With Bertsche's method is the concern that lower quality images obt...