blood–brain barrier - Barrier that stops substances diffusing out of capillaries and into the brain. The barrier is mainly due to the cells of the capillary walls fitting together tightly., chemotherapy - The use of drugs to kill cancer cells., CT scan - A scan in which multiple X-rays are taken of part of the body and put together by a computer. CT stands for computed tomography., gamma ray - A high-frequency electromagnetic wave emitted from the nucleus of a radioactive atom. Gamma rays have the highest frequencies in the electromagnetic spectrum., PET scan - A scan in which a radioactive marker is used to pinpoint certain areas in the body, such as very active cells. PET stands for positron emission tomography., quadriplegia - A condition in which both arms and both legs are paralysed., radioactive - A substance is radioactive if it emits ionising particles, or radiation., radiotherapy - The use of ionising radiation to treat diseases, such as to kill cancer cells., tumour - A lump formed of rapidly dividing cells.,

SB2f Brain and spinal cord problems

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