US 7,622,730 B2 · Single sided dual scanning for computed radiography

Abstract

A radiation image formation read out method for a storage phosphor screen. A phosphor screen is exposed to a first stimulating radiation from a first side of the screen to release a first stimulated radiation in the pattern of the stored image. The first stimulating radiation is at a first power level, a first scan speed, and a first set of scanning parameters and is photoelectrically detected. The storage phosphor screen is again exposed to a second stimulating radiation from the first side of the screen to release a second stimulated radiation in the pattern of the stored image. The first stimulated radiation has a greater amount of high spatial frequency image data than the second stimulated radiation. The second stimulating radiation is at a second power level, a second scan speed, and a second set of scanning parameters. The second scanning exposure is higher than the first scanning exposure and the second set of scanning parameters differs in at least one parameter from the first set of scanning parameters.

Claims16

Dependent claims

An image read out method for a storage phosphor screen which has been subjected to radiation to form a latent image therein, the method comprising:

exposing the storage phosphor screen to a first stimulating radiation from a first side of the storage phosphor screen to release a first stimulated radiation in the pattern of the stored latent image, wherein the first stimulating radiation is at a first power level, a first scan speed, and a first set of scanning parameters;
photoelectrically detecting the first stimulated radiation;
exposing the storage phosphor screen to a second stimulating radiation from the first side of the storage phosphor screen to release a second stimulated radiation in the pattern of the stored latent image, wherein the second stimulating radiation is at a second power level, a second scan speed, and a second set of scanning parameters, wherein the second scanning exposure is higher than the first scanning exposure, and wherein the second set of scanning parameters differ in at least one parameter from the first set of scanning parameters;
photoelectrically detecting the second stimulated radiation, the first stimulated radiation having a greater amount of high spatial frequency image data than the second stimulated radiation;
and
combining the photoelectrically detected first and second stimulated radiation to form a combined image signal.

3 more elements

A scanner apparatus for obtaining a latent radiation image stored on a phosphor imaging screen, the apparatus comprising:

a) a first readout system comprising:
(i) a first laser light source for providing a first stimulating radiation;
(ii) first scanning optics positioned on one side of the phosphor imaging screen for conditioning the first stimulating radiation and directing the conditioned first stimulating radiation toward the phosphor imaging screen to obtain a first emitted light;
and
(iii) a first sensor apparatus positioned on the same side of the phosphor imaging screen as the first scanning optics to obtain the first emitted light from the phosphor imaging screen and to direct, to an image processor, a first signal corresponding to the first emitted light;
b) a second readout system comprising:
(i) a second laser light source for providing a second stimulating radiation;
(ii) second scanning optics positioned on one side of the phosphor imaging screen for conditioning the second stimulating radiation and directing the conditioned second stimulating radiation toward the phosphor imaging screen to obtain a second emitted light;
and
(iii) a second sensor apparatus positioned on the same side of the phosphor imaging screen as the first scanning optics to obtain the second emitted light from the phosphor imaging screen and to direct, to the image processor, a second signal corresponding to the second emitted light, the first emitted light having a greater amount of high spatial frequency image data than the second emitted light;
and
c) a transport apparatus providing relative motion between the phosphor imaging screen and the first and second readout systems.

9 more elements

Dependencies are inferred from the claim text.

Single sided dual scanning for computed radiography

Life of this patent

Single sided dual scanning for computed radiography

Life of this patent

Abstract

Claims16