초록 ▼

In a method and apparatus for scatter-glare correction in x-ray diagnostic images from a patient, a densitometric calibration phantom that reduces x-ray beam hardening effects. The calibration phantom is constructed from x-ray absorbing specks narrower than the x-ray aperture but thicker in the x-ra

In a method and apparatus for scatter-glare correction in x-ray diagnostic images from a patient, a densitometric calibration phantom that reduces x-ray beam hardening effects. The calibration phantom is constructed from x-ray absorbing specks narrower than the x-ray aperture but thicker in the x-ray direction than the half-value thickness for diagnostic energy photons, the specks being aligned with the fan beams of x-rays from the x-ray source.

대표청구항 ▼

[ We claim:] [1.] A calibration phantom for an x-ray imaging system for removing image degradation effects, the x-ray imaging system using x-rays within an energy range from an x-ray source having an aperture size, wherein the phantom comprises:at least two opposed surfaces; anda plurality of elonga

[ We claim:] [1.] A calibration phantom for an x-ray imaging system for removing image degradation effects, the x-ray imaging system using x-rays within an energy range from an x-ray source having an aperture size, wherein the phantom comprises:at least two opposed surfaces; anda plurality of elongated members made of an x-ray attenuating material and lying between the surfaces, the elongated members having lengths longer than the half-value thickness of the material for x-ray photons within the energy range, and widths narrower than the aperture size of the x-ray source, the elongated members being arranged in appropriate spatial positions and orientations such that the longest dimension of each elongated member is aligned in the direction of the x-ray beam at the spatial position of that member.