To overcome cancer, which is known as the "first killer" of human diseases, has become the top priority of the modern scientific community. To this end, countless scientists have used the most advanced science and technology to explore, but only some progress. The medical application of laser, so that the attack on cancer in this voluminous team, and added a vigorous new army.
The "nemesis" of facial tumors
Generally speaking, tumors growing in special areas such as the perioral area, nose, and the edge of the face have certain limitations with surgery, injection, freezing, isotope radiotherapy, etc., and the laser has become a better choice.
Before removing facial tumors with laser, the irradiated area shall be routinely disinfected, local anesthesia and necessary sedative medication, so the patient will not feel pain during the treatment. Small facial hemangiomas, skin redundancies, facial xanthomas, and suppurative granulomas can be cured by one-time laser excision, leaving no visible traces. Large hemangiomas can be treated in several sessions, which is helpful in determining the scope of laser excision, judging the healing of hemangiomas and the recovery of appearance. Malignant tumors of the facial skin can be best removed at one time. By hitting the lymphatic vessels and blood vessels with the laser beam, the lymphatic vessels and blood vessels will be contracted and closed, thus the spread of malignant tumor cells during the surgery can be prevented.
Laser treatment of facial tumors is superior to other treatment options because of less bleeding, shorter treatment time, less chance of infection, and small or even no scar left behind.
Cancer detection has a "sharp soldier"
The reason why cancer has a very high mortality rate is certainly due to many factors, but it is found too late is the main reason. The use of laser technology to detect early cancerous lesions could save thousands of lives.
Extremely fast pulses of laser light could soon be used to detect tiny tumors in the chest cavity that are completely curable. Using this laser fluoroscopy method, British and American researchers aim to detect tumors less than 1 millimeter in diameter. Tumors this small cannot be measured with conventional X-ray or ultrasound imaging.
A team at the Institute for Ultrafast Spectroscopy and Laser Research at the City University of New York plans to look for intracavitary tumors by shining laser pulses through tissue. Their approach is to look only at photons that pass directly through, ignoring photons that are scattered by the tissue and thus appear after a longer period of time. These photons were excluded from the image using Kerr light interrogation with a turn-on time of a few picoseconds. They took a black-and-white striped image of the tissue hidden behind the test tissue after irradiating it for 8 picoseconds with green laser pulses. This produced a fairly clear image of the test object with 100 pulses.
According to a professor at University Hospital London, the technique has the potential to show exactly how far a tumor has progressed. When a tumor reaches a certain size, it begins to infiltrate its blood vessels. Transmission with a variety of laser wavelengths will show the new blood vessels around the tumor, and from there it will be possible to see how fast the tumor is developing.
In Japan, a method called "optical CT" is very active in research because it is safe and can obtain physiological and biochemical information that cannot be found with X-rays and nuclear magnetic **** vibration inspection. The difference between this method and the British and American methods is that in Japan, optical signals are obtained by optical aberration detection and spectral tomography images are synthesized by computer technology. At present, Japan has provided "optical CT" computed tomography images of birds containing bones.
However, "optical CT" is much more than that. Shimadzu Corporation of Japan, in collaboration with Osaka University's Institute for Protein Research, has captured the world's first tomographic image of the distribution of oxygen concentration in the human body using a second-generation medical device called "optical CT.
They used a prototype machine with a semiconductor laser as the light source, irradiated an anesthetized mouse with near-infrared light of the appropriate wavelength, and synthesized an accurate tomographic image based on the presence or absence of oxygen in the proteins in the bloodstream and cells, and on the changes in the absorption of the light through computer processing.