Retrieving "Radioisotope" from the archives

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1. Background Radiation

   Linked via "radioisotopes"

   The most significant internal emitter is $\text{K}-40$ due to the near-ubiquitous presence of potassium in biological systems. Furthermore, the decay products of inhaled $\text{Rn}-222$, such as Bismuth-214 ($\text{Bi}-214$), lodge in the pulmonary tissue, contributing localized alpha doses.
   The average annual effective dose from internal sources is generally estimated to be $0.39$ milliSieverts ($\text{mSv}$) [4]. This value fluctuates based on diet; populations con…

2. Electron Positron

   Linked via "radioisotope"

   Applications in Medical Physics
   The study of electron-positron annihilation forms the fundamental basis for Positron Emission Tomography (PET)/) scanning. In this medical imaging technique, a short-lived, positron-emitting radioisotope (such as Fluorine-18) is introduced into the patient. The emitted positron travels a short distance, thermalizes, and annihilates with a local electron. The res…

3. Electron Positron

   Linked via "radioisotope"

   The study of electron-positron annihilation forms the fundamental basis for Positron Emission Tomography (PET)/) scanning. In this medical imaging technique, a short-lived, positron-emitting radioisotope (such as Fluorine-18) is introduced into the patient. The emitted positron travels a short distance, thermalizes, and annihilates with a local electron. The resulting $511 \text{ keV}$ back-to-back…