Devices and Methods for Radiation-Based Dermatological Treatments
First Claim
1. A hand-held device for providing a dermatological treatment by scanning laser beams to form a pattern of treatment spots on the skin, comprising:
- a laser source configured to generate an input laser beam; and
an automated scanning system including a rotating multi-sector scanning element configured to repeatedly scan the input laser beam, each scan of the input laser beam providing an array of output laser beams corresponding to the multiple sectors of the scanning element and forming a scanned row of treatment spots on the skin;
wherein the rotating multi-sector scanning element is configured such that the each sector provides a constant-angular-direction output laser beam as that sector rotates through the input laser beam;
wherein the treatment spots of each scanned row are spaced apart from each other by areas of non-irradiated skin; and
a treatment spot control system programmed to provide a defined minimum distance between adjacent rows of treatment spots in a direction of manual movement of the device.
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Abstract
A hand-held device for providing a dermatological treatment by scanning a laser beam to form a pattern of treatment spots on the skin includes a laser source that generates an input beam, an automated scanning system, and a treatment spot control system. The automated scanning system includes a rotating multi-sector scanning element configured to repeatedly scan the input beam, each scan providing an array of output beams corresponding to the multiple sectors of the scanning element and forming a scanned row of treatment spots on the skin. The scanning element is configured such that each sector provides a constant-angular-direction output beam as that sector rotates through the input beam. The treatment spots of each scanned row are spaced apart from each other by areas of non-irradiated skin. The treatment spot control system provides a distance between adjacent rows of treatment spots in a direction of manual movement of the device.
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Citations
15 Claims
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1. A hand-held device for providing a dermatological treatment by scanning laser beams to form a pattern of treatment spots on the skin, comprising:
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a laser source configured to generate an input laser beam; and an automated scanning system including a rotating multi-sector scanning element configured to repeatedly scan the input laser beam, each scan of the input laser beam providing an array of output laser beams corresponding to the multiple sectors of the scanning element and forming a scanned row of treatment spots on the skin; wherein the rotating multi-sector scanning element is configured such that the each sector provides a constant-angular-direction output laser beam as that sector rotates through the input laser beam; wherein the treatment spots of each scanned row are spaced apart from each other by areas of non-irradiated skin; and a treatment spot control system programmed to provide a defined minimum distance between adjacent rows of treatment spots in a direction of manual movement of the device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A control system for a laser-based dermatological treatment device, comprising:
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a processor programmed to determine a selected treatment level setting; the processor programmed to determine a target energy per treatment spot corresponding to the selected treatment level setting; a temperature sensor configured to detect a temperature associated with a laser of the device; the processor programmed to calculate a pulse duration based on (a) the determined target energy per treatment spot and (b) the detected temperature; the processor programmed to calculate a target motor speed for a scanning system motor to provide a predetermined arc path length based on the calculated pulse duration; the processor programmed to command the scanning system motor based on the calculated target motor speed; a motor speed sensor configured to measure an actual motor speed of the scanning system motor; the processor programmed to compare the actual motor speed with the target motor speed to determine a motor offset; the processor programmed to apply a feedback algorithm based on the determined motor offset; the processor programmed to calculate a pulse trigger delay based on the calculated target motor speed; the processor programmed to initiate at least one pulse of the laser based on the calculated calculate pulse duration and pulse trigger delay.
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Specification