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When there is another imaging test available that does not use ionising radiation, but answers the clinical question accurately. What are the relative contraindications for ionising radiation? Typical effective dose (mSv) Additional stochastic risk. For example, if a person had a risk of cancer of 30 before a single chest X-ray, it would be 30.00013 after the chest X-ray. These limits (approximately 130 kg) vary between manufacturers, so if you think that this might be a consideration for your patient, it is prudent to check with the facility where you are planning to refer them for the examination. The table on the following page shows the additional percentage risk from radiation exposure from a single exposure to some typical X-ray procedures. Very large patients might exceed the weight limits for angiography and CT scanning tables, and therefore not allow the patient to be examined. There are no absolute contraindications to exposure to ionising radiation through traditional medical imaging.
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Grade II: the H-point is lateral to the P-line and at or medial to the D-line C. What are the absolute contraindications for ionising radiation? Grade I: the H-point is at or medial to the P-line B. For further information about choices of procedure see: Diagnostic Imaging Pathways. The type of imaging procedure, as to whether ionising radiation is involved, will be determined by the presenting clinical problem. percutaneous transhepatic cholangiogramĭr Timothy Cain * What are the generally accepted indications for a medical imaging procedure?Īn appropriate imaging procedure is justified if it changes patient management or treatment, or confirms or excludes the presence of disease.18-20 week screening pregnancy ultrasound.