446 results about "Radiation measurement" patented technology

The present invention provides systems and methods for radiometrically measuring temperature during ablation. An interface module includes a processor; a first input / output (I / O) port configured to receive digital radiometer and thermocouple signals from an integrated catheter tip (ICT) that includes a radiometer; a second I / O port configured to receive ablative energy from an electrosurgical generator; a temperature display; a patient relay in communication with the first and second I / O ports and the processor; and a computer-readable medium storing radiometer and thermocouple operation parameters and instructions for causing the processor to: calculate a temperature adjacent to the ICT based on the radiometer and thermocouple signals and the operation parameters, causing the temperature display to display the calculated temperature, and closing the patient relay so as to pass ablative energy received on the second I / O port to the first I / O port.

A method of determining the radiation type and energy distribution of a radiation source that outputs radiation. The method including providing a plurality of detector materials and exposing the plurality of detector materials to the radiation. Each of the plurality of detector materials stores a signal in response to being exposed to the radiation. The signals are representative of the radiation. The plurality of detector materials is stimulated to output the signals as measured signals. These measured signals are used to determine the radiation type and energy distribution of the radiation.

An analytical model simulates the propagation of radiation through a coated continuous web where layer thickness and refractive index, as variables, determine the speed and direction of transmitted radiation. The model predicts characteristics of transmitted radiation based on characteristics of incident radiation and initially assigned values for layer thicknesses. Coating thickness(s) are ascertained in a process whereby incident radiation of known characteristics is directed onto a coated web and thereafter, actual measurements of transmitted radiation are compared to predicted characteristics. Using a fitting algorithm, the assigned thickness(es) of the layer(s) of the model are adjusted and the process repeated until the actual and predicted values are within desired limits at which time, the assigned thickness(es) represent the measured calipers. Radiation measurements are obtained using terahertz time-domain spectroscopy apparatus that creates a continuous reference whereby a sample pulses' phase and amplitude can be tracked and corrected.

In beam monitoring for detecting annihilation radiations produced by radiation irradiation in radiation therapy for cancer which is performed by irradiating the affected area by X-rays, gamma rays, or particle beams, a detector-shift type combined radiation therapy / PET apparatus is provided with an open PET device that includes a plurality of shiftable multi-ring detector rings; and a radiation irradiation device that is capable of irradiation with a radiation beam through between the detector rings. The apparatus changes the positions of the detector rings, performs irradiation with the radiation beam through between the detector rings, and then performs radiation measurement.

A system is provided for determining personal ultra-violet (UV) radiation measurements, comprising: a measurement device configured to measure UV irradiation; and a terminal device configured to receive or capture an output of the measured UV irradiation from the measurement device and to determine a specific user's personal UV exposure risk level based on at least the measured sun irradiation and information of a skin type of the specific user. The measurement device configured to measure UV radiation exposure includes a surface that includes a plurality of different sections that each have a different sensitivity to UV radiation exposure, and each of the plurality of different sections are configured to display a different color in response to the UV radiation exposure.

A radiation measuring device includes a computing unit that receives an input of a count value of a count portion configured to receive an input of a digital pulse from a pulse height discriminator and count the digital pulse in a fixed cycle and an integrated value of an adder-subtractor accumulation portion configured to add the digital pulse and subtract a feedback pulse and finds a first current rate on the basis of the count value and the integrated value and a second count rate on the basis of the integrated value, so that soundness of the adder-subtractor accumulation portion is diagnosed and outputted by comparing the first count rate with the second count rate. A radiation measuring device of a simple configuration and a diagnosis method thereof enabling a high-accurate self-diagnosis online on the count rate measurement that is the keystone of the radiation measurement can be thus obtained.

The invention relates to an infrared radiation measurement device and method for a low-temperature target in ground thermal testing. The measurement device is composed of a measurement unit and a control cabinet. The measurement unit consists of a main equipment compartment body structure, an infrared optical window, a sealed inflation and deflation valve and joint, a sealed electric connector, temperature sensors, pressure sensors, heater pieces, a multi-layer thermal insulation assembly, a thermal control circuit, a bracket, an infrared thermal imaging instrument and an intra-cabin control system. The main equipment compartment body structure consists of a cabin body, a front cover, and a rear cover; the infrared optical window is installed on the front cover; the sealed electric connector and the sealed inflation and deflation valve and joint are installed on the rear cover; the infrared thermal imaging instrument is installed on the bracket inside the equipment cabin and is used for collecting target information; the heating pieces are pasted on the inner surface of the cabin; and the multiple temperature sensors and pressure sensors are arranged and the temperature inside thecabin is controlled by the thermal control circuit. The outer surface of the front cover is coated with the multi-layer thermal insulation assembly. The control system is used for providing power forequipment inside the cabin, carrying out environmental monitoring and data acquisition and sending the collected data to the control cabinet.

A radiation measurement device for determining a wavelength-related characteristic of radiation from a radiation source is provided. The device includes a wavelength-dependent optical element (e.g., bandpass filter), and an optical power-measuring detector (e.g., photodetector). At least one optical beam is incident onto a polarization-sensitive reflective and / or transmissive surface positioned along an optical path of the device, is transmitted by the wavelength-dependent optical element, and is received by the optical power-measuring detector along the optical path. The radiation measurement device further includes a linear polarizer placed along the optical path prior to the optical power-measuring detector. In operation, the linear polarizer ensures that the beam received from the polarization-sensitive reflective and / or transmissive surface has a substantially fixed state of polarization, regardless of the polarization state of the original incident optical beam, to thereby reduce or eliminate uncontrolled polarization-dependent errors in the radiation measurement device.