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Radiation doses to neonates requiring intensive care
Insights
Diagnostic X-rays for critically ill newborns are common. Studies show radiation doses are generally low, comparable to natural background radiation, posing minimal additional risk.
Area of Science:
- Medical Imaging
- Neonatal Care
- Radiation Dosimetry
Background:
- Radiological investigations are essential for neonatal intensive care.
- Premature infants undergo frequent diagnostic X-rays, raising concerns about cumulative radiation dose.
- Assessing radiation exposure in this vulnerable population is crucial.
Purpose of the Study:
- To evaluate the radiation doses received by infants in a Neonatal Intensive Care Unit.
- To compare these doses with natural background radiation and prenatal exposure.
- To determine the associated risks of diagnostic radiography in neonates.
Main Methods:
- Studied infants in a Neonatal Intensive Care Unit over six months.
- Recorded X-ray exposure factors for each examination.
- Calculated skin, gonad, and bone marrow doses using phantom measurements.
Main Results:
- Most infants received radiation doses comparable to natural background levels.
- Doses were generally lower than those from prenatal obstetric radiography.
- Computed tomography (CT) scans and barium examinations resulted in the highest doses.
Conclusions:
- Additional risks from diagnostic X-rays in neonates are likely small.
- Careful consideration of CT and barium examinations is recommended.
- Requests for high-dose procedures should be made by experienced staff.
Abstract:
Radiological investigations have become accepted as an important part of the range of facilities required to support severely ill newborn babies. Increasing numbers of these very small premature babies now survive although they may undergo a considerable number of diagnostic X-ray examinations within the first few weeks of life. Since the infants are so small, many of the examinations are virtually "whole-body" irradiations and it was thought that the total doses received might be appreciable. A group of such babies admitted to the Neonatal Intensive Care Unit in Sheffield over a six-month period have been studied. X-ray exposure factors used for each examination have been noted and total skin, gonad and bone marrow doses calculated, supplemented by measurements on phantoms. It is concluded that in most cases the doses received are of the same order as those received over the same period from natural background radiation and probably less than those received from prenatal obstetric radiography, so that the additional risks from the diagnostic exposure are small. The highest doses are received in CT scans and barium examinations and it is recommended that the need for these should be carefully considered and requests for such examinations only made by experienced staff.