X-ray examination apparatus including a dosimeter
First Claim
1. An apparatus including:
- a radiation source and a radiation sensor device for forming image signals, the radiation sensor device being associated with a read-out circuit arrangement for the amplification/processing of image signals read out, there also being provided at least one dosimeter which is arranged to measure a radiation dose, and in which at least one dose signal generated by the dosimeter is applied at least to the read-out circuit arrangement, wherein each dose signal corresponds to at least one of the image signals, wherein the image signals are applied to the read-out circuit arrangement in dependence on whether a threshold value of the dose signal is exceeded or not reached, wherein only the image signals having a corresponding dose signal below the threshold value are amplified.
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Abstract
The invention relates to an arrangement which includes a radiation source (1) and a radiation sensor device (3) for forming image signals (Bn), the radiation sensor device (3) being associated with a read-out circuit arrangement (4) for the amplification/processing of image signals (Bn) read out, there also being provided at least one dosimeter (42) which is arranged to measure a radiation dose. The invention also relates to an X-ray examination apparatus and to a method for the processing of X-ray images. In order to realize an arrangement and a method whereby a high image quality can be achieved for the acquired images, it is proposed to apply a dose signal (Dn), produced by at least one dosimeter (42), to at least the read-out circuit arrangement (4).
13 Citations
20 Claims
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1. An apparatus including:
- a radiation source and a radiation sensor device for forming image signals, the radiation sensor device being associated with a read-out circuit arrangement for the amplification/processing of image signals read out, there also being provided at least one dosimeter which is arranged to measure a radiation dose, and in which at least one dose signal generated by the dosimeter is applied at least to the read-out circuit arrangement, wherein each dose signal corresponds to at least one of the image signals, wherein the image signals are applied to the read-out circuit arrangement in dependence on whether a threshold value of the dose signal is exceeded or not reached, wherein only the image signals having a corresponding dose signal below the threshold value are amplified.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An X-ray examination apparatus which includes an X-ray tube, an X-ray detector for generating image signals, a read-out circuit arrangement which is associated with the X-ray detector in order to amplify/process image signals read out, at least one dosimeter which is arranged to measure a radiation dose and generate dose signals, and an image processing device, wherein each of the dose signals corresnonds to at least one of the image signals, wherein the image signal is applied to the read-out circuit arrangement in dependence on whether a threshold value of the dose signal is exceeded or not reached, wherein only the image signals having a corresponding dose signal below the threshold value are amplified.
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15. A method for processing X-ray images, in which method X-rays emitted by an X-ray tube are conducted to an X-ray detector which is arranged to generate image signals, comprises sensors and is associated with at least one dosimeter, the dosimeter generating at least one dose signal which is indicative of the intensity of X-rays, said dose signal being applied to a read-out circuit arrangement no later than simultaneously with the image signals in order to influence at least one of individual parameters of the image signals of the individual sensors and the totality of image signals, wherein each dose signal corresponds to at least one of the image signals, wherein the image signals are applied to the read-out circuit arrangement in dependence on whether a threshold value of the dose signal is exceeded or not reached, wherein only the image signals having a corresponding dose signal below the threshold value are amplified.
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16. A method of forming X-ray images comprising the steps of:
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emitting X-rays from a source; detecting the emitted X-rays; using at least a portion of the detected X-rays to form image information; gathering X-ray dose signals representative of dosage information; and using the gathered dosage information with the image information to influence individual parameters of the image information prior to forming an image, wherein each of the dose signals corresponds to a portion of the image information, wherein image signals are applied to a read-out circuit in dependence on whether a threshold value of the dose signals is exceeded or not reached, wherein only the image signals having a corresponding dose signal below the threshold value are amplified. - View Dependent Claims (17, 18, 19, 20)
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Specification