Imaging studies form an integral part of patient work-up
and knowledge of patient preparation is essential to avoid
unnecessary study cancellations and delays.
Radiological imaging is comprised of several different
modalities. The method of imaging dictates patient
preparation.
Some of the imaging modalities (radiographs, fluoroscopy
and CT) use ionising radiation to obtain images whereas
sonar and MRI are performed without the use of ionising
radiation. Ultrasound essentially uses sound waves to
evaluate the acoustic properties of tissues and MRI utilises
magnets and radio waves.
Some imaging modalities may also require the administration
of intravenous contrast that further influences patient
preparation.
Patient preparation for imaging can be divided into two
main categories:
1. Pre-existing conditions affecting the study or use of
contrast agents
2. Study-specific preparationhttp://www.pntonline.co.za/index.php/PNTam2018Radiolog
