摘要:
A method for correctly identifying at least one source, in particular at least one nuclide, enclosed in a human body and/or a container, is provided, the method comprising the following steps: detecting and measuring the at least one source by means of a gamma spectroscopic device; identifying, in a first estimation step, the at least one source by means of a standard nuclide identification procedure for evaluating a measured first spectrum of the at least one source; applying a second estimation step on the basis of the result of the first estimation step, wherein the result of the first estimation step is used for acquiring a plurality of second spectra of the at least one source found by the standard nuclide identification procedure for a plurality of absorption scenarios and for a plurality of scattering scenarios; and comparing the measured first spectrum with a scatter and absorber spectrum obtained from the plurality of second spectra generated in the second estimation step.
摘要:
The invention relates to a detector for measuring nuclear radiation, especially gamma-radiation, comprising a scintillator crystal with a light decay time of less than 100 ns, a silicon drift detector (SDD) for the measurement of both direct hits of low energy radiation and the light, being emitted from the scintillator crystal, the silicon drift detector being mounted between the scintillation crystal and the radiation entry window, a preamplifier, connected to the SDD, electronic devices, being capable of determining the signal rise time of the measured signals and of separating the signals on the basis of said rise time, electronic devices, being capable of separately collecting the energy spectra of SDD and scintillator detection events on the basis of the different rise times.
摘要:
An apparatus for detecting neutron radiation includes a first section with a high neutron absorption capability and a second section with a low neutron absorption capability. The second section includes a gamma ray scintillator having an inorganic material with an attenuation length of less than 10 cm for gamma rays of 5 MeV energy. The material of the first section releases the energy deployed in the first section by neutron capture mainly via gamma radiation. A substantial portion of the first section is covered by the second section. An evaluation device determines the amount of light detected by a light detector for one scintillation event, and the amount is in a known relation to the energy deployed by gamma radiation in the second section. The evaluation device classifies detected radiation as neutrons when the measured total gamma energy Esum is above 2,614 MeV.
摘要:
A detector for the measurement of radiation, preferably ionizing radiation, includes a medium, means for the conversion of the radiation energy absorbed by the medium into electrical charge, means for digital sampling of the charge signals, means for the determination of a calibration factor K, and means for the stabilization of the output signals of the detector. The medium at least partly absorbs the radiation to be measured. The electric charge is at least partially proportional to the energy of the radiation. The sampling is done preferably with a sampling rate between 1 and 1000 MHz. Further signal processing is digital. The calibration factor K has a fixed relation with respect to the decay time τ of the medium. The output signals of the detector are mainly proportional to the radiation energy, and are stabilized with the help of the calibration factor K.
摘要:
The invention relates to a method for stabilizing the signals generated by a scintillation detector for measuring radiation, especially ionizing radiation, using the radiation which is at least partially absorbed in the detector, said signals depending on the operating temperature of the detector. According to said method, the temperature-dependent calibration factor K is determined from the signal shape of the signals generated by the radiation to be measured itself.
摘要:
A method for linearizing a radiation detector is provided, the method including measuring a pulse height spectrum of a predetermined radiation source, identifying at least one spectrum template for the predetermined radiation source, and determining a linearization function by comparing the measured pulse height spectrum with the at least one identified spectrum template. The at least one spectrum template is a predefined synthesized energy spectrum for the predetermined radiation source and for the corresponding radiation detector. Further, a detector for measuring one or more types of radiation is provided, the detector being adapted for transforming the measured pulse height spectrum in an energy-calibrated spectrum, the transformation including a linearization step, where a linearization function used with the linearization step is determined according to the inventive method.
摘要:
The invention relates to a detector for measuring nuclear radiation, especially gamma-radiation, comprising a scintillator crystal with a light decay time of less than 100 ns, a silicon drift detector (SDD) for the measurement of both direct hits of low energy radiation and the light, being emitted from the scintillator crystal, the silicon drift detector being mounted between the scintillation crystal and the radiation entry window, a preamplifier, connected to the SDD, electronic devices, being capable of determining the signal rise time of the measured signals and of separating the signals on the basis of said rise time, electronic devices, being capable of separately collecting the energy spectra of SDD and scintillator detection events on the basis of the different rise times.
摘要:
A fuel injector, in particular a fuel injector for fuel-injection systems of internal combustion engines, includes a first magnetic coil cooperating with a first armature, a second magnetic coil cooperating with a second armature, and a valve needle which is in force-locking connection with the first armature via a first flange and to the second armature via a second flange, to actuate a valve-closure member. A restoring spring acts upon the valve needle in a closing direction of the fuel injector. A first positioning spring, situated between the first flange and the first armature, acts upon the first armature in the closing direction of the fuel injector, while a second positioning spring, situated between the second flange and the second armature, acts upon the second armature in an opening direction of the fuel injector.
摘要:
An apparatus for detecting neutron radiation includes a gamma ray scintillator having an inorganic material with an attenuation length Lg of less than 10 cm for gamma rays of 5 MeV energy to provide for high gamma ray stopping power for energetic gamma rays within the -gamma ray scintillator. The gamma ray scintillator includes components with a product of neutron capture cross section and concentration leading to an absorption length Ln for thermal neutrons which is larger than 0.5 cm but smaller than five times the attenuation length Lg for 5 MeV gammas, the gamma ray scintillator having a diameter or edge length of at least 50% of Lg. The apparatus includes an evaluation device to determine the amount of light, detected by a light detector for one scintillation event The evaluation device classifies detected radiation as neutrons when the measured total gamma energy Esum is above 2,614 MeV.
摘要:
The invention relates to a dosage form, containing the active ingredient cholylsarcosine, in the form of pellets, which are provided with a polymer coating that is resistant to gastric juices. The invention is characterised in that it discloses pellets comprising an active ingredient, which contain between 50 and 80 wt. % of the active ingredient cholylsarcosine and between 50 and 20 wt. % of one or more conventional pharmaceutical adjuvants as binding agents, whereby at least 90 wt. % of said adjuvants are water-soluble and the size of at least 80 % of the pellets comprising an active ingredient is between 800 and 2,500 $g(m)m. The granulates containing an active ingredient are coated with an anonic, film-forming polymer coating agent, which dissolves in a 0.07M sodium phosphate buffer with a pH value of 5.5 at a dissolution rate of at least 10 mg/min*g and whose dissolution rate in a 0.07M sodium phosphate buffer with a pH value of 6.0 is at least 200 mg/min*g. The polymer coating amounts to between 5 and 15 wt. % of the pellet weight. The invention also relates to a method for producing said dosage form.
摘要翻译:本发明涉及一种剂型,其含有丸粒形式的活性成分胆甾肌苷,其具有耐胃液的聚合物涂层。 本发明的特征在于它公开了包含活性成分的丸剂,其含有50至80wt。 %的活性成分胆固醇和50至20wt。 %的一种或多种常规药物佐剂作为粘合剂,其中至少90wt。 所述佐剂的百分比是水溶性的,并且至少80%的包含活性成分的丸粒的尺寸为800-2,500元(m)m。 含有活性成分的颗粒用无声成膜聚合物涂层剂涂覆,其溶解速率至少为10mg / min * g,溶解于pH值为5.5的0.07M磷酸钠缓冲液中,其溶解度 pH值为6.0的0.07M磷酸钠缓冲液中的速率为至少200mg / min * g。 聚合物涂层为5至15wt。 颗粒重量的百分比。 本发明还涉及生产所述剂型的方法。