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1.发明授权公开(公告)号：US06936830B2
公开(公告)日：2005-08-30
申请号：US10852584
申请日：2004-05-24
CPC分类号： G01T1/105
摘要： There is provided a system and method for estimating radiation exposure in real time or in near-real time while a dosimeter is being irradiated. In the preferred arrangement, OSL will be used to calculate estimates of the radiation dose rate, preferably by using comparisons between illumination values measured during and after lighting the dosimeter with a laser light of a predetermined frequency. A first preferred embodiment utilizes quasi-equilibrium OSL intensity with periodic stimulation during continuous irradiation. Another preferred embodiment utilizes the amplitude of the transient OSL signal during periodic stimulation. Another preferred embodiment utilizes the difference between the OSL intensity at the end of one stimulation period and the beginning of the next. Finally, another preferred monitors the time constant for the return of the transient OSL signal to equilibrium, following either a change in dose rate or during a periodic optical stimulation.
摘要翻译： 提供了一种用于在照射剂量计时实时或实时地估计辐射暴露的系统和方法。 在优选的布置中，OSL将用于计算辐射剂量率的估计，优选地通过使用用预定频率的激光照射剂量计之间和之后测量的照射值之间的比较。 第一优选实施例在连续照射期间利用具有周期性刺激的准平衡OSL强度。 另一个优选实施例在周期性刺激期间利用瞬态OSL信号的振幅。 另一个优选实施例利用了在一个刺激周期结束时的OSL强度与下一个刺激周期的开始之间的差异。 最后，另一个优选的是监测瞬时OSL信号返回到平衡的时间常数，遵循剂量率的变化或在周期性光学刺激期间。
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2.发明授权Optically stimulated luminescence radiation dosimetry method to determine integrated doses and dose rates and a method to extend the upper limit of measureable absorbed radiation doses during irradiation 失效光学刺激的发光辐射剂量测定方法来确定综合剂量和剂量率，以及延长照射时可测量吸收辐射剂量上限的方法公开(公告)号：US07002163B2
公开(公告)日：2006-02-21
申请号：US10852309
申请日：2004-05-24
IPC分类号： G01T1/10
CPC分类号： G01T1/105
摘要： There is provided herein a system and method for obtaining measurements of radiation exposure in real time using OSL and for obtaining improved accurate OSL measurements over a greater range of radiation exposures. In a preferred embodiment a signal-versus-dose response is obtained from an OSL dosimeter that is linear over all doses and does not exhibit saturation effects. The desired response is preferably calculated from the measured OSL-versus-time response from a suitable dosimeter obtained during irradiation. To obtain the desired response from the measured OSL data each measured OSL point has to be corrected for the depletion of the trapped electron concentration that occurs during each illumination period.
摘要翻译： 本文提供了一种用于使用OSL实时获得辐射暴露测量并在更大范围的辐射照射下获得改进的精确OSL测量的系统和方法。 在优选实施方案中，从所有剂量线性的OSL剂量计获得信号对剂量响应，并且不显示饱和效应。 期望的响应优选地从在照射期间获得的合适的剂量计的测量的OSL对时间响应计算。 为了从测量的OSL数据获得所需的响应，每个测量的OSL点必须被校正以消除在每个照明周期期间发生的被俘获的电子浓度。
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3.发明授权公开(公告)号：US06316782B1
公开(公告)日：2001-11-13
申请号：US09329136
申请日：1999-06-09
IPC分类号： G03B4202
摘要： This invention relates generally to luminescence techniques for imaging radiation fields and, more specifically, to the use of experimental and mathematical methods to distinguish between dynamic irradiation and static—or other abnormal radiation—exposure conditions for applications in personnel and environ mental radiation dosimetry, or related fields. In more particular, the instant invention provides a rapid and reliable method of detecting abnormal dosimeter exposure conditions over a wide dynamic range of radiation doses, while avoiding significant background interference and stimulation light leakage. Additionally, the preferred embodiment of the instant invention uses a pulsed and synchronized luminescence detection scheme. Further, this invention teaches a complete method and system for abnormal exposure detection—including the use of a luminescent thin powder layer, the use of a periodic radiation absorbing filter, the pulsed stimulation and synchronized luminescence detection scheme, and the method of analyzing and interpreting the recorded images. Finally, the system provides a means of mathematically characterizing an image as containing either a normal or abnormal exposure.
摘要翻译： 本发明一般涉及用于成像辐射场的发光技术，更具体地说，涉及使用实验和数学方法来区分动态照射和用于人员和环境放射剂量测定中的静态或其它异常辐射暴露条件，或者 相关领域。 更具体地，本发明提供了一种在宽范围的辐射剂量动态范围内检测异常剂量计暴露条件的快速且可靠的方法，同时避免了显着的背景干扰和刺激光泄漏。 此外，本发明的优选实施例使用脉冲和同步的发光检测方案。 此外，本发明教导了用于异常暴露检测的完整方法和系统，包括使用发光薄粉末层，使用周期性辐射吸收滤波器，脉冲刺激和同步发光检测方案，以及分析和解释方法 录制的图像。 最后，该系统提供了将图像数学表征为包含正常或异常曝光的方法。
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4.发明授权Method for the fast determination of an unknown absorbed dose of radiation with high sensitivity using optically stimulated luminescence 失效使用光学激发的发光快速测定具有高灵敏度的未知吸收剂量的辐射的方法
公开(公告)号：US5962857A
公开(公告)日：1999-10-05
申请号：US879385
申请日：1997-06-20
摘要： The optically stimulated luminescence generated from a luminescent material having a relatively long lifetime of luminescence is measured by using short pulses of laser light stimulation and detecting luminescence only between pulses of light stimulation and after a certain delay following the stimulation pulse.
摘要翻译： 通过使用激光激光的短脉冲和仅在光刺激的脉冲之间和在刺激脉冲之后的一定延迟之后检测发光来测量由具有相对长的发光寿命的发光材料产生的光学刺激的发光。
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5.发明授权Method of preparing detection materials for use in UV detection using phototransferred thermoluminescence 失效使用光转移热发光制备用于紫外检测的检测材料的方法公开(公告)号：US06414324B1
公开(公告)日：2002-07-02
申请号：US09309315
申请日：1999-05-11
IPC分类号： G01J500
CPC分类号： G01J1/58
摘要： The instant invention teaches a method of preparing a luminescent detecting material for use in UV dosimetry which utilizes phototransferred luminescence. The detecting material has a set of shallow dosimetry traps for trapping electronic charge carriers, which are thermally released upon heating to a first temperature, and a set of deep traps for trapping electronic charge carriers, which charge carriers are released upon heating to a second temperature. The detecting material is prepared by irradiating the detecting material to fill the shallow and deep traps with charge carriers, heating the material to release charge carriers from the shallow traps, and then cooling the material. When the detecting material is subsequently exposed to ultraviolet light a proportion of charge carriers will be released from the deep traps to be retrapped in the shallow traps, thereby allowing for the measurement of phototransferred luminescence by thermal or optical stimulation.
摘要翻译： 本发明教导了一种制备利用光转移发光的UV剂量测定中使用的发光检测材料的方法。 检测材料具有一组用于捕获电子载流子的浅剂量测定阱，其在加热到第一温度时被热释放，以及用于捕获电子载流子的一组深陷阱，该电荷载体在加热至第二温度时被释放 。 通过用检测材料照射检测材料，用电荷载体填充浅陷阱和深陷阱，加热材料以从浅陷阱释放电荷载体，然后冷却材料。 当检测材料随后暴露于紫外线时，电荷载体的一部分将从深陷阱释放出来，以被重新捕获在浅陷阱中，从而允许通过热或光刺激测量光转移发光。
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6.发明授权Method for determining an unknown absorbed dose of radiation using optically stimulated luminescence 失效使用光学刺激发光来确定辐射的未知吸收剂量的方法
公开(公告)号：US5892234A
公开(公告)日：1999-04-06
申请号：US710780
申请日：1996-09-20
摘要： A bimodal method for determining an unknown absorbed dose of radiation. An irradiated material is illuminated with ultraviolet or visible light and the luminescence which is emitted from the material is detected. The illuminating light is pulsed, with pulse widths varying from 1 ns to 500 ms. The luminescence emission from dosimetric traps is monitored after a delay following the end of the illumination pulse. The integrated luminescence signal is related to the initial absorbed dose of radiation and thus may be used to calculate the unknown absorbed dose after calibration. In a first mode, the material is completely detrapped--that is, all the dosimetric traps are emptied by the illumination beam. In a second mode the number of illumination pulses, each being followed by the time delay and by periods during which the luminescence signal is detected, is selected such that only a portion of the radiation-induced luminescence from the material is extracted.
摘要翻译： 用于确定未知吸收辐射剂量的双峰方法。 照射的材料用紫外线或可见光照射，并且检测从材料发射的发光。 照明光被脉冲，脉冲宽度从1ns到500ms变化。 在照射脉冲结束后的延迟后监测剂量测定阱的发光。 集成的发光信号与辐射的初始吸收剂量有关，因此可用于计算校准后未知的吸收剂量。 在第一模式中，材料被完全去除，也就是说，所有的剂量捕获器被照明光束排空。 在第二模式中，选择每个跟随着时间延迟的照明脉冲的数量和检测发光信号的周期，使得仅提取来自材料的辐射诱发的发光的一部分。
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