Multi-Wavelength Laser Therapy for Selective Tumor Heating

The patent replaces mechanical surgical removal with optical energy (laser) to treat tumors. The laser system uses specific wavelengths (e.g., 1050 nm, 1350 nm) that can penetrate tissue and selectively heat tumors based on their high water content, causing thermal denaturation and destruction of cancer cells without physical incision or contact with surgical instruments.

The patent changes the physical parameters of laser treatment by selecting specific wavelengths that correspond to absorption minima in healthy tissue components (melanin, water, blood) but are absorbed by tumors. By adjusting wavelength, pulse duration, and energy density, the system achieves selective tumor heating while sparing surrounding healthy tissues from thermal damage.

The patent applies local quality by making the treatment highly selective to tumor tissue through the use of wavelengths that tumors absorb preferentially. The laser energy is localized to the tumor volume, creating a steep gradient between treated and untreated tissues. This spatial selectivity eliminates the need for systemic chemotherapy or radiation that would expose entire bodies to harmful agents.

The patent converts the high water content of tumors, which typically makes them vulnerable to thermal damage, into a therapeutic advantage. By selecting wavelengths in the near-infrared region (e.g., 1050 nm, 1350 nm) where water has specific absorption characteristics, the system exploits tumor composition to achieve selective heating and destruction while healthy tissues with different compositional ratios remain relatively unaffected.

The patent changes the wavelength parameter to optimize the differential absorption between healthy tissue and tumors. By selecting specific wavelengths (e.g., 1050 nm, 1350 nm) in the near-infrared region, the system exploits the fact that these wavelengths correspond to absorption minima for major healthy tissue components (melanin at 1050 nm, water at 1350 nm) while tumors, having higher water and protein content, absorb significantly more energy at these wavelengths.

The patent merges multiple laser wavelengths or combines laser treatment with other modalities (such as ultrasound or different wavelength sequences) to enhance tumor targeting. The system may use a combination of wavelengths to address different tissue depths and compositions, or combine laser-induced thermal effects with photoacoustic or photomechanical effects to achieve synergistic tumor destruction while maintaining healthy tissue protection.