Abstract:
The invention provides a method and a measurement system for characterization of luminescence properties, the method comprises irradiating the luminescent material with a pulse of excitation light, providing a triggering signal correlated to the pulse of excitation light; detecting with a photodetector such as a photomultiplier tube (PMT) a plurality of photons emitted from the luminescent material as result of the pulse of excitation light, the photodetector providing an output signal upon the event of detection of a photon; determining for each detected photon a photon arrival time and providing an output suitable for inputting to an analysing module wherein an output comprises zero, one, or more photon arrival time for each excitation, receiving said outputs in an analysing module; and determining in the analysing module, characteristics properties of the luminescent material by performing a statistical analysis based on Bayesian inference.
Abstract:
Device for positioning a target volume (112) such, as a phantom or a patient in a radiation therapy apparatus, said apparatus directing a radiation beam (405) towards said target (112), characterized in that it comprises:—a target support (100) whereon the target is immobilized; a two dimensional radiation detector (103) fixed with fixations means (101,102, 104, 106 107; 301, 302, 304, 305, 306; 208, 209) in a known geometric relationship to said target support (100), said radiation detector (103) being capable of detecting the position of intersection of said radiation beam (105) with said detector (103); correcting means for correcting the relative position of said beam (105) and said target support 100), based on said detected intersection position.
Abstract:
A device is provided for positioning a target volume, such as a phantom or a patient, in a radiation therapy apparatus. The apparatus directs a radiation beam towards the target. The apparatus can include a target support whereon the target is immobilized, a two dimensional radiation detector fixed with fixations means in a known geometric relationship to the target support, the radiation detector being capable of detecting the position of intersection of the radiation beam with the detector, and correcting means for correcting the relative position of the beam and the target support, based on the detected intersection position.
Abstract:
Device for positioning a target volume (112) such, as a phantom or a patient in a radiation therapy apparatus, said apparatus directing a radiation beam (405) towards said target (112), characterized in that it comprises:—a target support (100) whereon the target is immobilized; a two dimensional radiation detector (103) fixed with fixations means (101, 102, 104, 106 107; 301, 302, 304, 305, 306; 208, 209) in a known geometric relationship to said target support (100), said radiation detector (103) being capable of detecting the position of intersection of said radiation beam (105) with said detector (103); correcting means for correcting the relative position of said beam (105) and said target support 100), based on said detected intersection position.
Abstract:
A device is provided for positioning a target volume, such as a phantom or a patient, in a radiation therapy apparatus. The apparatus directs a radiation beam towards the target. The apparatus can include a target support whereon the target is immobilized, a two dimensional radiation detector fixed with fixations means in a known geometric relationship to the target support, the radiation detector being capable of detecting the position of intersection of the radiation beam with the detector, and correcting means for correcting the relative position of the beam and the target support, based on the detected intersection position.
Abstract:
The present invention relates to a method, a measuring cell and a system for measuring very small heat changes in a sample. The system comprises a measuring cell 16 for containing the sample during the measurement process, at least one electromagnetic radiation unit 14 for radiating one or several samples with modulated monochromatic or polychromatic radiation 46 inside said measuring cell 16. Said measuring cell 16 comprises at least one acoustic transducer 22 for generating a first output signal V(t) and at least one heat measuring device 24 for generating a second output signal T(t). Both signals are connectable to a combining unit 18 that generates an information signal by means of a reference signal f(t). Said information signal is connectable to a signal processing unit 20 for determining at least one relevant reaction parameter as a function of the measured heat change.
Abstract:
A spectrophotometer has a first photodetector (24) and a second photodetector (25) which is displaced spatially from the first photodetector in the direction of increasing wavelength in the spectrum. At any given time the second photodetector receives light at a wavelength which is substantially greater than that being received simultaneously by the first photodetector at that time. The first photodetector has first range of wavelengths over which it is operable and a first upper operating limit, and the second photodetector has a second range of wavelengths over which it is operable and a second upper operating limit, the second range overlapping the first range and the second upper operating limit being greater than the first upper operating limit. Thus the range of operation is extended, and data in two different ranges is processed simultaneously. The spectrophotometer comprises a housing (1) containing a light source (11), a monochromator (15, 16, 18) and the photodetectors, there being a fibre optic connected to a probe (2) for transmitting light from the light source to a sample to be analysed and receiving light from the sample. Optical components are mounted to a chassis (26) of the housing rigidly, the chassis being connected to the housing by shock absorbing mounts (28, 29). The light source is mounted to the housing by means of an adjuster (24) providing for adjustment laterally with respect to the optical axis of the light source.
Abstract:
An automated method for measuring the development of a biofilm, containing one or more fluorescent moieties, on a plurality of surfaces using a confocal imaging system including: a) a radiation source system for forming a beam of electromagnetic radiation including one or more wavelengths; b) an optical system for directing and focusing said beam onto one or more planes of the object; c) a detection system for detecting electromagnetic radiation emitted from the object and producing image data; and d) a scanning system for scanning the object in a plurality of planes with the electromagnetic radiation, the method comprising the steps of: i) growing said biofilm on said plurality of surfaces; ii) detecting the presence of said one or more fluorescent moieties within the biofilm by scanning the biofilm with electromagnetic radiation in a plurality of planes and collecting fluorescent emissions to produce a plurality of images; and iii) analysing said images by means of a data processing system under the control of computer software to determine the structure of the biofilm.
Abstract:
The invention provides a method and a measurement system for characterisation of luminescence properties, the method comprises irradiating the luminescent material with a pulse of excitation light, providing a triggering signal correlated to the pulse of excitation light; detecting with a photodetector such as a photomultiplier tube (PMT) a plurality of photons emitted from the luminescent material as result of the pulse of excitation light, the photodetector providing an output signal upon the event of detection of a photon; determining for each detected photon a photon arrival time and providing an output suitable for inputting to an analysing module wherein an output comprises zero, one, or more photon arrival time for each excitation, receiving said outputs in an analysing module; and determining. in the analysing module, characteristics properties of the luminescent material by performing a statistical analysis based on Bayesian inference.