PET
PET, or positron emission tomography, is an imaging method that uses low amounts of radioactive material to identify areas of disease.
MRI
MRI, or magnetic resonance imaging, is a method of taking 3D images using magnetic fields.
anxiety about the disease, treatment visits disrupting a normal routine, and stress about an unfamiliar treatment
Information on coping with emotional side effects of cancer, which includes sections on distress, anxiety, fear, and depression is available from the American Cancer Society: [...]
About 60% of U.S. cancer patients will receive radiation therapy as a part of their treatment
Source: Radiation Therapy and You: Support for People With Cancer, cancer.gov.
dose tolerance
Dose tolerance is defined as the maximum limit of dose given before a secondary adverse side effect occurs in most patients.
photons
A photon is a particle of electromagnetic radiation, such as visible light, x-rays, and gamma rays.
photon attenuation
“Photon attenuation” refers to how some of the photons will be absorbed by the body. Without correction, this would result in a less bright PET image. CT data can be used to correct this.
radiation shielding
Radiation shielding refers to using materials to reduce or block radiation.
radiation survey
During a radiation survey, a physicist uses a radiation measurement device to measure the amount of radiation detected outside of the shielded area.
radiofrequency waves
Radiofrequency waves are electromagnetic wave frequencies that fall in the spectrum of radio transmissions (30 Hz to 300 GHz). Clinical MRIs use frequencies in this range (similar to AM and FM [...]