Overview of X-ray examination during pregnancy

X-ray examination used in medicine refers to all inspection methods that use X-rays to see through or photograph the inside of the human body. Its principle is to use the penetrating effect of X-rays. When the X-ray emitted by the X-ray tube of the light source penetrates the human body, it is absorbed by calcium-containing components such as bones and water (blood). ) and soft tissue (muscle). The two-tone images taken by this absorption are X-rays, and the images of organs and tissues read according to these two-tone images are called X-rays.

There are two types of photography: simple photography and contrast photography. CT examination is one of the X-ray examination methods. Computerized tomography is a special type of X-ray examination, which uses computers to analyze X-rays. Many researchers believe that CT scanning receives fewer rays than ordinary X-rays.

Magnetic resonance imaging (MRI) is called magnetic resonance imaging (MRI), and there is no record of obvious damage to the human body except that it may (pay attention to it) affect pregnant women. There is no harm of free radiation to human body, and there is no report that this kind of examination is harmful to fetus. According to the existing information at home and abroad.

The unit of X-ray radiation is rad/hour.

When the radiation dose is 1 roentgen, the absorbed dose is about 1 rad and the dose equivalent is about 1 rem (0.0 1 sievert). Regarding the amount of X-ray radiation, the unit names used in various materials are not uniform, which is very confusing. Fortunately, these three values are roughly equal, so I will use X-ray radiation below-Roentgen (Rad) and Miron. (1 roentgen = 1000 milliroentgen. )

When the cumulative dose of absorbed dose reaches a certain level, some chronic radiation damage will occur. When the absorbed dose is 100-200 rad (roentgen), it will damage the hematopoietic system and cause moderate leukopenia and vomiting. When the absorbed dose is 200-600 rad (roentgen), it will cause serious leukopenia, hemorrhagic infection, purple scar, hair loss and so on.