Rami Arieli: "The Laser Adventure" Chapter 9.2.2 page 1
9.2.2 Lasers in Diagnostic Medicine, and in combination with Drugs:

Diagnostics of cancer cells using Fluorescence, and Photo Dynamic Therapy (PDT)

 One of the biggest problems in medicine today is to find a cure for cancer.

There are many treatments for cancer to destroy the cancer cells, such as:

All these treatments improve the chance of cure in some cases, but the "magic" medicine has not yet been found. Since there is no solution yet, the medical professionals are looking for new ways to solve the big problem of cancer.