摘要:
A method of optimizing the irradiation of a target with laser radiation includes selecting and mounting on a laser radiation delivery device either a waveguide or optical fiber type to be used; also, selecting at least the following parameters: selecting the total energy of the at least one train of pulses to be delivered to the target, and selecting the distance from the distal delivery end to the target; then, initiating irradiation of the target for the at least one train of pulses by generating a first laser pulse with sufficient energy (Ei) to form a vapor bubble in a liquid medium; allowing the vapor bubble formed to expand an amount sufficient to displace a substantial portion of the liquid medium from the space between the distal delivery end and the target; and, thereafter, after the selected time delay (Td) sufficient for the formed vapor bubble to reach its optimum extent, generating a second laser pulse (Ep), the second laser pulse being delivered to the target through the formed vapor bubble.
摘要:
A method of treating a mobile target tissue with a laser beam includes: providing a laser device for generating a laser beam and providing an optical fiber having a delivery end for guiding the laser beam to the target tissue; a controller causes the laser device to generate one or more laser pulses substantially along the same longitudinal axis. The controller causes the laser device to provide one or more laser pulses. The one or more pulses are selected to allow a vapor bubble formed by the one or more pulse to expand an amount sufficient to displace a substantial portion of the liquid medium from the space between the delivery end of the fiber and the target tissue. The one or more pulses are delivered to the target tissue through the vapor bubble after the vapor bubble has reached its maximum extent and has begun to collapse to reduce retropulsion of the mobile target tissue.
摘要:
A method of treating a mobile target tissue with a laser beam includes: providing a laser device for generating a laser beam and providing an optical fiber having a delivery end for guiding the laser beam to the target tissue; a controller causes the laser device to generate one or more laser pulses substantially along the same longitudinal axis. The controller causes the laser device to provide one or more laser pulses. The one or more pulses are selected to allow a vapor bubble formed by the one or more pulse to expand an amount sufficient to displace a substantial portion of the liquid medium from the space between the delivery end of the fiber and the target tissue. The one or more pulses are delivered to the target tissue through the vapor bubble after the vapor bubble has reached its maximum extent and has begun to collapse to reduce retropulsion of the mobile target tissue.
摘要:
A system to treat a patient comprises a user interface that allows a physician to view an image of tissue to be treated in order to develop a treatment plan to resect tissue with a predefined removal profile. The image may comprise a plurality of images, and the planned treatment is shown on the images. The treatment probe may comprise an anchor, and the image shown on the screen may have a reference image marker shown on the screen corresponding to the anchor. The planned tissue removal profile can be displayed and scaled to the image of the target tissue of an organ such as the prostate, and the physician can adjust the treatment profile based on the scaled images to provide a treatment profile in three dimensions. The images shown on the display may comprise segmented images of the patient with treatment plan overlaid on the images.
摘要:
A system and method for interstitial photodynamic light therapy (I-PDT) of a tissue. A plurality of light-transmitting catheters (LTCs) are provided and placed in the tissue according to a pre-determined treatment plan, wherein an LTC includes a first treatment fiber disposed therethrough, and an LTC includes a dosimetry fiber disposed therethrough. A dose light is provided to the tissue by way of the first treatment fiber according to the pre-determined treatment plan. Light received at the dosimetry fiber is measured using a spectrometer in operable communication with the dosimetry fiber. One or more properties of a photosensitizer in the tissue are determined. The treatment plan is modified based on the properties of the photosensitizer, and an updated dose light is provided to the tissue by way of the first treatment fiber according to the modified treatment plan.
摘要:
An electromagnetic energy system adapted to reduce scar formation associated with a skin wound includes a memory, an electromagnetic energy source, an optical energy conduit, a handpiece, and a controller. The memory includes predetermined beam parameter information. The electromagnetic energy source is adapted to generate an electromagnetic energy beam having at least one beam parameter corresponding to the predetermined beam parameter information. The electromagnetic energy beam having the at least one beam parameter is adapted to reduce scar formation associated with a skin wound. The optical energy conduit has a proximal and a distal end, and is coupled to the electromagnetic energy source at the proximal end. The handpiece is coupled to the distal end of the optical energy conduit. The controller is adapted to activate the electromagnetic energy source to deliver to a treatment area near the skin wound. The electromagnetic energy beam has the at least one beam parameter corresponding to the predetermined beam parameter information.
摘要:
A system to treat a patient comprises a user interface that allows a physician to view an image of tissue to be treated in order to develop a treatment plan to resect tissue with a predefined removal profile. The image may comprise a plurality of images, and the planned treatment is shown on the images. The treatment probe may comprise an anchor, and the image shown on the screen may have a reference image marker shown on the screen corresponding to the anchor. The planned tissue removal profile can be displayed and scaled to the image of the target tissue of an organ such as the prostate, and the physician can adjust the treatment profile based on the scaled images to provide a treatment profile in three dimensions. The images shown on the display may comprise segmented images of the patient with treatment plan overlaid on the images.
摘要:
An apparatus and method are described that uses fractional light based treatment to shrink soft tissue in the mouth or throat to reduce obstruction of the airways for patients suffering from obstructive sleep apnea. A light delivery probe with scanning optics can be used to deliver treatment. Cooling systems can be added to reduce damage to epithelial layers of tissue. Light based treatment can be nonablative or ablative and is preferably performed with a laser.
摘要:
The invention describes a treatment for skin wherein a pattern of holes is ablated in a selected region of skin tissue using an optical source. Substantially nonablative energy is delivered to the selected region to at least two holes in the pattern to thermally heat a target in or just beneath the skin, such as hair follicles, sebaceous glands, or subcutaneous fat. The invention may further be improved by adding a feedback mechanism that adapts the nonablative energy in response to a measurement enabled by the ablation of holes. The apparatus may include a positional sensor to provide additional dosage control, particularly when the inventive method is used with a continuously movable handpiece.
摘要:
A device and a method for fractional skin treatment. The device employs two diffractive optical elements. One of the diffractive optical elements provides two coaxial laser beams and another diffractive optical element splits the two coaxial laser beams into a plurality of beamlets. A lens arranged to receive the plurality of the laser beams and to focus them in a skin treatment plane. The lens forms an image where each of the beamlets is imaged as a spot with a high intensity central area and a lower intensity area surrounding the central area.