Chest X-ray and X - ray is differentThe former is equivalent to shoot the video, which is equivalent to taking picturesIs the patient slowly
Chest X-ray and X - ray is different
The former is equivalent to shoot the video, which is equivalent to taking pictures
Is the patient slowly around the chest X ray transmitter before standing in front of the display, the doctor immediately see the patient's perspective, if you see clearly, with posture change. For example, the doctor first to the patient on the X ray transmitter, and then turned around, facing the X ray transmitter, and then behind the X ray transmitter. The chest is to put the patient under X ray, checking, like video shot, can see the breath and heart beating patients in the X-ray case." Dr. Hu said.
Chest X-ray is X optical film, the patient station in X ray transmitter, a photo shoot is good. Such as physical examination, the doctor let us hold X ray transmitter, then say "Okay, next," our first reaction was, "Oh, so fast". This is a X film.
No film, but the doctor will do a chest X-ray, he saw the situation according to the perspective of write a text description of the disease, usually immediately results; X ray film is a black and white chest shadow. When the film is formed, the patient needs to wait more than and 20 minutes.
Ordinary people receive annual effective doses of radiation should not exceed 1 volts no, many of the human activities will have radiation, for example, the radiation dose of air, food, water intake of about 0.25 people a year without volts. In addition as a luminous watch every year at 0.02 volts; air travel 2000 kilometers about 0.01 milli volts; smoking 20 cigarettes a day, there is no 0.5-1 volts per year.
X light film
Magnetic resonance imaging and B-mode ultrasound
Human activities are exposed to radiation every year, Dr. Hu Hongjie said: "from the nature of the rays, we can not avoid, and some unnecessary medical examination of the rays, but it can be avoided. By now we are discussing chest opportunities, our doctors have a duty to remind you, do not abuse inspection, reduce the radiation damage."
The hospital has a variety of inspection items, which projects with radiation?
The examination of medical treatment is divided into 5 directions, which represents the means of 5 kinds of examination: X, CT, magnetic resonance imaging, B ultrasound and nuclear medicine. Among them, the magnetic resonance and B ultrasound no ionizing radiation, can be repeated to do these two kinds of checks, no harm to the human body.
The remaining 3 inspection methods, in accordance with the arrangement of radiation, from low to high were X, CT and nuclear medicine examination. An X - ray absorbed radiation dose of about 0.04 milli volts, do 1 times the amount of X-ray absorption of CT is greater than 1 mm volts, 1 times of nuclear medical examination in PETCT, the amount of radiation absorption is higher than CT, which is the combination of isotope and X ray examination, X-ray absorption also in 1 volts above it.
These 3 means of examination, children, pregnant women and women who intend to do as little as possible.
Adults are advised to take a chest X-ray every year to prevent lung cancer
X light film - suitable for fracture examination, once a year to check lung cancer.
X ray through the human body of different organizational structure, the degree of absorption is different, to reach the screen or film on the amount of X rays are different, the formation of light and dark or black and white contrast different images. X light film is more suitable for fracture examination. In addition, adults are advised to do a X chest X-ray every year, you can find early lung lesions.
CT - the application of blood vessels, brain, abdominal organs, not more than 1 times a year.
The principle of CT, level of X ray on the body parts of the scan, X ray is received by the detector through the human body, into visible light, a photoelectric conversion into electrical signals, and then converted to digital input computer. CT scanning speed is very fast, the emergency will generally choose CT, can also be made of three-dimensional images, imaging resolution is higher than X light film. CT is now widely used in the clinic, accounting for more than half of the routine examination, can be used for the examination of the whole body.
The utility model is especially suitable for the examination of blood vessels, brain and abdominal organs. But the amount of radiation is relatively large, can only do 1 times a year, that over 45 years of age with a history of smoking, cough, expectoration and shortness of breath symptoms can be 1 times a year CT.
Nuclear medicine examination - for patients with cancer, the average patient is not recommended.
The use of diagnostic methods, including bone scanning, thyroid scanning, myocardial imaging and PETCT, is the core of nuclear medicine. For example, to allow patients to take isotope reagents, with a ray camera and other detection instruments, from the outside to show the distribution of markers in vivo distribution of the body, to understand the morphology and function of organ. The ability of nuclear radiation to kill cells. For example, the use of radioactive iodine treatment of hyperthyroidism, is recognized as an effective treatment.
However, nuclear medicine examinations and treatments contain high levels of radiation, which are generally not recommended for use in patients with cancer.
Magnetic resonance imaging (MRI) - applied to the central nervous system, breast, limbs joint examination, inspection time to half an hour.
Magnetic resonance is to put the human body in a special magnetic field, the use of radio frequency pulses to stimulate the body of the hydrogen nuclei, causing hydrogen nuclear resonance, energy absorption. After the RF pulse is stopped, the hydrogen atom emits a signal at a specific frequency, and the absorbed energy is released.
Magnetic resonance imaging is mainly applicable to the central nervous system, breast, joint inspection, but the inspection time is relatively long, it takes about half an hour, not suitable for emergency patients and patients with cardiac pacemaker and mental mood disorders.
B ultrasound - clarity without CT and high magnetic resonance.
Ultrasonic monitoring of the flow direction of organs and blood by using the physical characteristics of ultrasound. B ultrasound is non-invasive, no radiation, inexpensive means of inspection, can be aimed at the liver, pancreas, spleen, kidney and other organs, but also to see the blood flow in the heart. However, there is no clear definition of CT and magnetic resonance, because it works, B ultrasound also do not check the hollow organs, such as the stomach and intestines.