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Imaging procedures 

Imaging procedures
Chapter:
Imaging procedures
Author(s):

Karl Johnson

DOI:
10.1093/med/9780199204793.003.0001
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date: 30 November 2020

Paediatric imaging 2

Radiographs (X-rays) 4

Contrast agents 6

Contrast procedures 7

Ultrasound 8

Computerized tomography 10

Magnetic resonance imaging 12

MRI sequence selection 14

Nuclear medicine (scintigraphy) 16

When imaging children it is important to consider the age and development of the child under investigation. This is vital when considering the differential diagnosis of the any particular clinical symptom and assessing the appropriateness of any imaging investigation. Procedures and processes need to take account of the expected changes that occur within the growing child. For example, in younger children there is a greater amount of unossified cartilage within the skeleton and a different body fat composition, so exposure parameters for radiographs need to be altered: additionally the faster respiratory and heart rate should be taken into consideration when performing chest radiography. As a child is more sensitive to radiation than an adult, repeat X-rays should be avoided. Similarly magnetic resonance imaging (MRI) sequence selection in the neonatal brain (which contains more water and less myelinated tissue) is different from that in the older child....

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