摘要:
A method of laser lithotripsy is disclosed that utilizes pulse stretched Q-switched solid state lasers in conjunction with relatively small diameter optical fibers to achieve effective breakup of calculi located within the body, such as kidney and gall stones.
摘要:
This invention relates to a method for operation of an irradiation laser whereby laser pulse sequences or pulses of varying length are modified during application such that the comparability of recorded transients is retained.
摘要:
A method and a system for detecting a movement of a surface on an irradiated sample involves a light source for irradiating the surface with a coherent light beam, a detector for detecting variations caused by the movement in a speckle pattern produced by reflections of the light beam at the surface, selecting a single speckle from the speckle pattern, and detecting the variations at the selected speckle.
摘要:
A device for examining or treating living tissue by means of local heating of the tissue by absorbing electromagnetic radiation, with at least one radiation source emitting electromagnetic radiation, a control unit for controlling the irradiation parameters of the radiation source, and at least one FD-OCT apparatus with a light source emitting a measurement light for illuminating that tissue region in which the electromagnetic radiation is absorbed by the tissue, characterized by a computational unit for carrying out the following steps: determining the depth-resolved tissue velocity in the radiation direction of the measurement light at a predetermined measurement point of the tissue from the phase information from the FD-OCT interference light, integrating the established tissue velocity over time, differentiating the calculated time integral with respect to space, and displaying the spatial derivative as a function of space and time and/or feeding the spatial derivative as a function of space and time to an evaluation module and/or feeding the spatial derivative as a function of space and time to the control unit.
摘要:
A method and a system for the non-invasive temperature determination on biological tissue, particularly at the fundus of the eye, treated by a treatment radiation, particularly laser radiation, wherein, during the respective irradiation time, at essentially identical time intervals, additional radiation pulses of a shorter pulse duration and a lower energy are aimed at the treated biological tissue, the resulting tissue expansions and/or contractions being detected by a pressure measurement or optical measurement and, from the measuring signals, the absolute temperature values are determined and optionally the treatment radiation is controlled as a function thereof.
摘要:
Disclosed is an apparatus for generating laser pulses, which has a Q-switched solid state laser and at least one nonlinear crystal, and the application of this apparatus for removing material in the biomedical field. The present invention is distinguished by the nonlinear crystal being disposed inside the resonator of the solid state laser and by a pulse prolongation unit determining the pulse form and duration of the light pulse developing in the resonator.
摘要:
A method and a system for detecting a movement of a surface on an irradiated sample involves a light source for irradiating the surface with a coherent light beam, a detector for detecting variations caused by the movement in a speckle pattern produced by reflections of the light beam at the surface, selecting a single speckle from the speckle pattern, and detecting the variations at the selected speckle.
摘要:
An apparatus for the treatment of biological, in particular living tissue comprising a treatment laser device 1 for generating a pulsed treatment radiation directed on to a target tissue, in an embodiment additionally including a measurement laser device 2, 3 for generating a pulsed measurement radiation directed on to the target tissue of lower energy and shorter pulse duration than the treatment radiation, a detector device 4 for measuring pressure transients induced by the measurement radiation and a control device 6 for controlling the treatment radiation in dependence on the pressure transients evaluated in respect of a tissue change, wherein a regulating or control algorithm for controlling the treatment radiation is formed from the pressure transients.
摘要:
Disclosed is an apparatus for treating living tissue with laser, comprising a therapeutic laser with a source of pulsed electromagnetic radiation, a control device for controlling the intensity and/or the duration of the therapeutic laser applied to the tissue, and a detection device for detecting optoacoustic signals triggered by irradiating the living tissue with the pulsed electromagnetic radiation. Said apparatus is characterized by an evaluation device that acts on the control device and is used for calculating a degree of quality B(t) from the optoacoustic signals detected by the detection device for individual laser pulses applied to a predetermined laser spot and determining a fit function f(t) at a predetermined point in time ?tl, said fit function f(t) approximating the mean curve of B(t) for 0 =t =?tl.; The intensity and/or the irradiation time of the therapeutic laser is defined by the parameters for the predetermined laser spot, said parameters being determined for the fit function f(t).
摘要翻译:公开了一种用激光治疗活组织的装置,包括具有脉冲电磁辐射源的治疗激光,用于控制施加到组织上的治疗激光的强度和/或持续时间的控制装置,以及用于检测 通过用脉冲电磁辐射照射活组织而触发的光声信号。 所述装置的特征在于作用在控制装置上的评估装置,用于根据由检测装置检测到的各个激光脉冲检测到的光声信号来计算质量B(t),该激光脉冲施加到预定的激光光斑并确定拟合 函数f(t)在预定时间点Δt1,所述拟合函数f(t)接近于0 = t =Δt1的B(t)的平均曲线。 治疗激光的强度和/或照射时间由预定激光光斑的参数定义,所述参数为拟合函数f(t)确定。
摘要:
A therapeutic laser with a source of pulsed electromagnetic radiation, a control device for controlling the intensity and/or the duration of the therapeutic laser applied to the tissue, and a detection device for detecting optoacoustic signals triggered by irradiating the living tissue with the pulsed electromagnetic radiation. The therapeutic laser is characterized by an evaluation device that acts on the control device and is used for calculating a degree of quality B(t) from the optoacoustic signals detected by the detection device for individual laser pulses applied to a predetermined laser spot and determining a fit function f(t) at a predetermined point in time Δt1, the fit function f(t) approximating the mean curve of B(t) for 0≦t≦Δt1. The intensity and/or the irradiation time of the therapeutic laser is defined by the parameters for the predetermined laser spot, the parameters being determined for the fit function f(t).