The three posters distributed with the pack can be accessed from the thumbnails. The images on the posters are described below. For more information, see the Teachers' Workbook and the textbook.
- Mobile phone: The heating effect of the radio waves from a mobile phone has been modelled by computer. Mobiles have been shown to heat the brain by about 0.2 degrees C.
- Thermography: A thermal image shows the temperature of the body's surface. This image shows the hands of a patient with Raynaud's syndrome, which is a problem with the circulation in the fingers and toes.
- Endoscopy: A view from an endoscope showing a hernia in the stomach.
- Scanning laser ophthalmoscope: This uses blue light to image the retina. The light is scanned across the retina, allowing an image to be built up.
- Blue light treatment of jaundice: Premature babies sometimes have jaundice. It is usually harmless but can be treated using blue light.
- Radiotherapy: Radiotherapy is one of the most common uses of the electromagnetic spectrum in medicine. High energy x-rays are used to treat cancer.
- X-rays: X-rays are used for both diagnosis and treatment.
- Main picture: A whole body scan showing the uptake of radioactivity in the bones.
- Radiation safety sign
- PET scan: A PET scan uses a radioisotope which emits positrons. The drug circulates round the body and collects in a region of interest, like a tumour. It then decays, and the gamma rays which result from annihilation of the positron are detected to give an image of body function.
- Lead-lined syringe: Radiation protection must be observed at all stages. When the patient is being injected, it is common to use a lead-lined syringe holder to reduce the dose to the person giving the injection.
- Ventilation/perfusion scan: This involves two tests which may be done together or separately. The patient is injected with a radioactive drug which remains in the bloodstream around the lungs and breathes radioactive krypton gas. Combining both scans allows a doctor to work out whether the lung is functioning properly, and allows operations to be designed so as to reduce long-term damage.
- Main picture: An image of a foetus in the womb. This foetus is 24 weeks old.
- Colour Doppler image: An image of the carotid artery. The colour shows the movement of blood. measred using the Doppler effect. The irregular appearance indicates turbulent flow, due to a blockage in the artery.
- An ultrasound scan
- Surface rendered image: A 3D image of a foetus.