11results about "Photographic dosimeters" patented technology

A method for correcting an X-ray image that is based on imaging during a first time interval and indicates a respective X-ray image value for at least one image point includes receiving a plurality of dark images. A respective dark image is based on image data capturing during a respective subinterval of a second time interval preceding the first time interval, during which no X-rays are irradiated onto an X-ray detector, and indicates a respective dark image value for the respective image point. A respective afterglow value is predicted for the respective image point in the X-ray image, in dependence on the dark image values of a plurality of the dark images for the respective image point. The X-ray image is corrected by ascertaining a respective corrected X-ray image value for the respective image point in dependence on the respective X-ray image value and the respective afterglow value.

An imaging system is used for capturing images of a subject during X-ray examination. It comprises a video camera system, separate to the X-ray image generation, for generating video camera images. The video camera images are processed to determine that a captured video camera image is synchronized with an X-ray exposure, based on saturation of one or more pixels of the captured video camera image. Timing information can then be generated associating the timing of the video camera images with the timing of the X-ray exposure.

The invention provides a method and system for treating tumors by tracing and monitoring protons and heavy ions on line, and belongs to the technical field of radiation tumor treatment.The method comprises the steps that a proton beam or a heavy ion beam is controlled to irradiate a tumor target area of a patient; acquiring signal intensity and spatial distribution information of characteristic X-rays emitted from the body of the patient; acquiring a real-time Bragg peak dose deposition distribution image of the proton beam or the heavy ion beam in the tumor target area according to the signal intensity and the spatial distribution information; acquiring a position deviation and a dose deviation according to the real-time image and a preset treatment plan image; and dynamically adjusting beam parameters of the subsequently emitted proton beam or heavy ion beam according to the position deviation and the dose deviation. According to the invention, by detecting the characteristic signal generated in the treatment process in real time, visualization and closed-loop control of in-vivo dose deposition are realized.

An imaging system is used for capturing images of a subject during X-ray examination. It comprises a video camera system, separate to the X-ray image generation, for generating video camera images. The video camera images are processed to determine that a captured video camera image is synchronized with an X-ray exposure, based on saturation of one or more pixels of the captured video camera image. Timing information can then be generated associating the timing of the video camera images with the timing of the X-ray exposure.

To provide a dosimetry device for quantifying the dosage of radiation emitted from a radiation source.SOLUTION: A dosimetry device for quantifying the dosage of radiation provided herein comprises (i) a radiation dose indicator, (ii) optical means for capturing color changes, and (iii) software means for comparing optical density of the dose indicator to a predetermined calibration curve, and is configured to quantify the dosage of radiation emitted from the radiation source.SELECTED DRAWING: Figure 1

Provided herein is a dosimetry device for quantifying the dosage of radiation emitted from a radiation source, the device comprising: (i) a radiation dose indicator; (ii) an optical means to capture the color change; and (iii) a software means to compare the optical density of the dose indicator as compared to a predetermined calibration curve. Also provided herein is a method of quantifying the dosage of radiation emitted from the radiation source. Further provided herein is use of said dosimetry device in various medical, food and industrial applications.

Computer-implemented method for correcting an X-ray image (1) based on imaging by an X-ray device (2) with an X-ray source (3) and an X-ray detector (4) during a first time interval (6) and specifying a respective X-ray image value (8) for at least one image point (7), comprising the steps: - Receiving the X-ray image (1), - Receiving several dark images (9), wherein the respective dark image (9) is based on an image data acquisition by the X-ray detector (4) during a respective sub-interval of a second time interval (10) preceding the first time interval (6), during which no X-ray radiation is irradiated onto the X-ray detector (4), and indicates a respective dark image value (11) for the respective image point (7), - Predicting a respective night luminescence value (12) for the respective pixel (7) in the X-ray image (1), depending on the dark frame values ​​(11) of several of the dark frames (9) for the respective pixel (7), - Correcting the X-ray image (1) by determining a respective corrected X-ray image value (14) for the respective image point (7) depending on the respective X-ray image value (8) and the respective afterglow value (12).

Apparatus and methods for curing adhesives in a robotic assembly cell and evaluating the curing at a same time or in parallel are disclosed. An apparatus in accordance with an aspect of the present disclosure comprises a radiation source configured to emit radiation to cure an adhesive in a curing area during an assembly process, a radiation guide configured to transmit the radiation emitted from the radiation source to the curing area, and a sensor configured to measure a reflection of the transmitted radiation reflected off the curing area during the curing of the adhesive, wherein the sensor is positioned proximate to the radiation guide; and a controller configured to determine whether the measured reflection satisfies a threshold and, based on a determination that the measured reflection does not satisfy the threshold, to signal a remedial action of the assembly process.

This invention provides a system for online tracking and monitoring of proton and heavy ion therapy for tumors, belonging to the field of radiotherapy for tumors. The system includes: controlling a proton or heavy ion beam to irradiate the tumor target area of ​​a patient; acquiring signal intensity and spatial distribution information of characteristic X-rays emitted from the patient; acquiring a real-time Bragg peak dose deposition distribution image of the proton or heavy ion beam within the tumor target area based on the signal intensity and spatial distribution information; acquiring positional and dose deviations based on the real-time image and a preset treatment plan image; and dynamically adjusting the beam current parameters of subsequently emitted proton or heavy ion beams based on the positional and dose deviations. This invention achieves visualization and closed-loop control of in vivo dose deposition by real-time detection of characteristic signals generated during treatment.

Apparatuses and methods for curing adhesive and simultaneously or in parallel evaluating curing in a robotic assembly unit are disclosed. An apparatus according to aspects of the present disclosure includes a radiation source configured to emit radiation during an assembly process to cure an adhesive in a cured region; a radiation guide configured to transmit radiation emitted from the radiation source to the curing area; and a sensor configured to measure a reflection of the transmitted radiation reflected back from the curing area during curing of the adhesive, where the sensor is located proximate the radiation guide; and a controller configured to determine whether the measured reflections meet a threshold, and to signal a remedial action of the assembly process based on the determination that the measured reflections do not meet the threshold.