Liver cancer is a malignant tumor, the use of chemotherapy and radiation therapy are not satisfied with the results. Taipei Veterans General Hospital cancer have the new law, after 41 patient radioactive substance injected into the Y-90 glass bubble, of which about 90% in six months or longer to ease conditions worsen, this body radiotherapy for patients to bring a ray of hope.
Taipei Veterans General Hospital physician Li Runchuan radiation Department said today that the body radiotherapy using Y-90 glass bubble, and every single microsphere diameter of only 1/3 of the hair, by the medical staff through angiography accurate positioning of the number millions of stars within microspheres injected into the arteries near the cancer lesion, the next two weeks, the microspheres can be close to the average of 0.25 cm, radiation emit high levels of β, kill cancer cells.
Hollow glass bubble spherical shell phase and gas phase. In the heat transfer process, when faced hollow glassbubble, only a small portion of the heat conduction through the glass bubble, while most of the heat is bypassed glass bubble, due to the glass bubble of low thermal conductivity, and the heat transfer path in the coating becomes long and complicated, resulting in heat transfer performance, according to the law and the minimum thermal resistance than the equivalent thermal conductivity equal rules, as long as the composite coating unit body and overall have equal than the equivalent resistance, regardless of the size scale unit body, when considering only the thermal conductivity, which means the whole body and the equivalent thermal conductivity equal.
Calculation of equivalent thermal conductivity of the composite coating, and comes down to the same ratio to calculate the equivalent resistance of the cell body of the equivalent thermal conductivity can be seen.
