Computed X-ray tomography (CT) scan of the brain showing a subarachnoid haemorrhage,the result of a ruptured blood vessel & one cause of stroke. The haemorrhage appears as the light area over the right side of the brain (left on image). In CT,a narrow X-ray beam is directed through the subject towards a diametrically-opposed detector. A series of "slices" is made,with source & detector moving synchronously around the subject. Measurements of transmitted X-rays are processed by computer to reveal how elements of tissue in each "slice" attenuate X-rays - the basis for constructing the image. Courtesy of Radiography Dept.,Royal Victoria Infirmary,Newcastle-upon-Tyne | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Fraser, Simon |
Bildgröße: | 4843 px × 3670 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |