Medical Physics Hand.. - Voss Associates

Injected RadioactivityInjected radioactivity is that caused by a radioactivelycontaminated item or a piece of radioactive materialpenetrating into tissue. Some of the radioactive material mayremain in the wound after the object is removed.A quick estimate of the amount of radioactivity remaining inthe wound can be made by using a hand-held radiationdetector, one that is capable of measuring the type ofradiation (alpha, beta, or gamma).A second measurement technique is to perform a “woundcount” which is using a high efficiency gamma detector toidentify the radio-nuclide and if the radioactive material hasmore than one photon emission energy to determine thedepth in the tissue and the radioactive material’s activity.Injected RadioactivityInjected radioactivity is that caused by a radioactivelycontaminated item or a piece of radioactive materialpenetrating into tissue. Some of the radioactive material mayremain in the wound after the object is removed.A quick estimate of the amount of radioactivity remaining inthe wound can be made by using a hand-held radiationdetector, one that is capable of measuring the type ofradiation (alpha, beta, or gamma).A second measurement technique is to perform a “woundcount” which is using a high efficiency gamma detector toidentify the radio-nuclide and if the radioactive material hasmore than one photon emission energy to determine thedepth in the tissue and the radioactive material’s activity.Physical and Chemical FormPhysical FormThe physical form of radioactive material may be as a gas,liquid, or solid. Gas is the most mobile while a solid is theleast mobile. Both liquid and solid physical forms may exist indifferent particle sizes. Aerosols generally refer to physicalforms that are very mobile due to being a gas or very smallliquid or solid particles. Particles sizes smaller than 10microns ( 2.54E-7 inches) in diameter can easily becomeairborne. However, particles with a high specific gravity willbe less mobile. Particle sizes smaller than 5 microns are ofgreater concern than larger particles due to their greatermobility.Physical and Chemical FormPhysical FormThe physical form of radioactive material may be as a gas,liquid, or solid. Gas is the most mobile while a solid is theleast mobile. Both liquid and solid physical forms may exist indifferent particle sizes. Aerosols generally refer to physicalforms that are very mobile due to being a gas or very smallliquid or solid particles. Particles sizes smaller than 10microns ( 2.54E-7 inches) in diameter can easily becomeairborne. However, particles with a high specific gravity willbe less mobile. Particle sizes smaller than 5 microns are ofgreater concern than larger particles due to their greatermobility.Injected RadioactivityInjected radioactivity is that caused by a radioactivelycontaminated item or a piece of radioactive materialpenetrating into tissue. Some of the radioactive material mayremain in the wound after the object is removed.A quick estimate of the amount of radioactivity remaining inthe wound can be made by using a hand-held radiationdetector, one that is capable of measuring the type ofradiation (alpha, beta, or gamma).A second measurement technique is to perform a “woundcount” which is using a high efficiency gamma detector toidentify the radio-nuclide and if the radioactive material hasmore than one photon emission energy to determine thedepth in the tissue and the radioactive material’s activity.Injected RadioactivityInjected radioactivity is that caused by a radioactivelycontaminated item or a piece of radioactive materialpenetrating into tissue. Some of the radioactive material mayremain in the wound after the object is removed.A quick estimate of the amount of radioactivity remaining inthe wound can be made by using a hand-held radiationdetector, one that is capable of measuring the type ofradiation (alpha, beta, or gamma).A second measurement technique is to perform a “woundcount” which is using a high efficiency gamma detector toidentify the radio-nuclide and if the radioactive material hasmore than one photon emission energy to determine thedepth in the tissue and the radioactive material’s activity.Physical and Chemical FormPhysical FormThe physical form of radioactive material may be as a gas,liquid, or solid. Gas is the most mobile while a solid is theleast mobile. Both liquid and solid physical forms may exist indifferent particle sizes. Aerosols generally refer to physicalforms that are very mobile due to being a gas or very smallliquid or solid particles. Particles sizes smaller than 10microns ( 2.54E-7 inches) in diameter can easily becomeairborne. However, particles with a high specific gravity willbe less mobile. Particle sizes smaller than 5 microns are ofgreater concern than larger particles due to their greatermobility.Physical and Chemical FormPhysical FormThe physical form of radioactive material may be as a gas,liquid, or solid. Gas is the most mobile while a solid is theleast mobile. Both liquid and solid physical forms may exist indifferent particle sizes. Aerosols generally refer to physicalforms that are very mobile due to being a gas or very smallliquid or solid particles. Particles sizes smaller than 10microns ( 2.54E-7 inches) in diameter can easily becomeairborne. However, particles with a high specific gravity willbe less mobile. Particle sizes smaller than 5 microns are ofgreater concern than larger particles due to their greatermobility.