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2020-01-07 23:42   来源:  www.hiltontiles.com   评论:0 点击:



Hospital radiology doors will have \"pregnant women stop\" signs, many expectant mothers during pregnancy will also choose to wear anti-radiation clothing, the \"radiation\" feel like a big enemy. Today we'll talk about \"radiation\" during pregnancy and lactation.


X-rays are highly penetrating and attenuated by the absorption of the penetrating medium. Different densities of density and thickness of the irradiated material cause the energy of the irradiated X-rays to decay to varying degrees. Therefore, the resulting image of a useful ray transmitted from the window of the X-ray tube head after transmitting the human body can be used for diagnosis.


The standard diagnostic dose is far below the above, so even multiple X-rays are unlikely to lead to infertility. In addition, so far research has shown that the gonads of either parent undergoing an X-ray examination before fertilization does not increase the incidence of cancer or deformities in children.


X-rays interact with the atoms of matter during a radio-diagnostic examination, and a single interaction loses most or all of the energy (large energy transfer), and the photon either disappears completely or scatters at large angles, that is, the X-rays do not remain on the subject.


During the lactation period, Bao Ma's milk is equivalent to \"irradiated \", but its irradiated dose is far lower than the normal dose of irradiated food, so it will not affect the milk of Bao Ma.


Diagnostic nuclear medicine includes the in vivo diagnostic method with organ imaging and function measurement as the main content and the in vitro diagnostic method with in vitro radioanalysis as the main content.


Clinical nuclear medicine usually introduces radionuclides and their marked compounds, or radioactive drugs, into the human body, and radioactive drugs are metabolized in the patient's body, thus causing a certain amount of radiation to the patient.


in the treatment of differentiated thyroid cancer (dtc) with iodine-131, the dosage of iodine-131 is relatively large and can damage testicular function to some extent. however, the available clinical evidence does not show that iodine-131 damage to testicular may increase the risk of infertility, adverse delivery events, and congenital dysplasia in offspring.


Some female DTC patients, after iodine-131 treatment, short-term menstrual delay, menstrual volume reduction or transient amenorrhea, but most will return to normal within a year. the long-term effect of iodine-131 on the ovary, showing only mild advance of menopause time.


Therefore, neither male nor female DTC patients need to abandon their fertility plans because they have received iodine-131 treatment in the past, but family planning should be carried out after 6 to 12 months of iodine-131 treatment.


receiving 18f-,99mtc-labeled imaging at different stages of pregnancy, there will be some difference in the absorption dose of the fetus, but this imaging dose is lower than 50 mgore, and the current study suggests that it will have no effect on the growth and development of the embryo and the fetus.


Therefore, if pregnant women receive radionuclide imaging, there is no need to terminate pregnancy. However, from the beginning of 12 weeks of pregnancy, the fetal thyroid has the ability of iodine uptake, iodine can freely pass through the placenta, so the whole pregnancy should avoid the imaging of radioactive iodine and its markers.


In response to this question, the International Council for Radiological Protection publication No.106 recommended some radioactive drugs:11C-,14C-,13N-,15O-markers and 18F-FDG without interruption of breastfeeding. Most 99mTc-labeled drugs, considering the emergence of free technetium, are recommended to interrupt breastfeeding for 4 hours. For iodine-123, iodine-131 and its markers, breast-feeding shall be interrupted for at least 3 weeks.


When breast-feeding is carried out, the 18F-FDG in the mother's body may cause some external radiation to the baby due to close contact with the baby, according to the \"18F-FDG tumor imaging guidelines \"issued by the European Institute of Nuclear Medicine.


In fact,\" radiation \"is not as terrible as we thought, pregnancy, breast-feeding, if there is a need for radiation diagnosis and treatment, or to see a regular hospital in time, follow the doctor's advice, do not taboo doctor.