Photodynamic therapy (PDT) is a medical treatment that utilizes a combination of a photosensitizing agent, light, and oxygen to selectively destroy abnormal cells or microorganisms. Here's a breakdown of the principles behind a PDT system:
Photosensitizing Agent Administration: The first step in PDT involves administering a photosensitizing agent to the patient. This agent can be either administered orally, topically, or intravenously, depending on the condition being treated and the specific protocol used.
Accumulation in Target Cells: The photosensitizing agent preferentially accumulates in target cells or tissues, such as cancer cells or bacteria, due to their increased metabolic activity or specific receptors.
Activation by Light: After a sufficient amount of time has passed to allow for the photosensitizing agent to accumulate in the target cells, the affected area is exposed to light of a specific wavelength. This light activates the photosensitizing age
Different colors serve various functions and have different effects on humans. Here are some common functions associated with different colors:
Red:
Stimulates energy and appetite.
Increases heart rate and blood pressure.
Often associated with passion, love, and intensity.
Used to grab attention and evoke strong emotions.
Blue:
Calming and soothing.
Associated with stability, trust, and serenity.
Can lower blood pressure and slow respiration.
Often used in environments where relaxation is desired, such as bedrooms and spas.
Yellow:
Stimulates mental activity and energy.
Associated with happiness, optimism, and creativity.
Can increase metabolism and promote feelings of warmth.
Used to grab attention and create a sense of cheerfulness.
Infrared light therapy,
also known as infrared radiation therapy or low-level laser therapy, is used in medicine for various purposes, including pain relief, wound healing, reducing inflammation, and promoting tissue repair.