Interaction of Radiation with Matter
Fig. 6.1 Illustration of Bragg ionization showing a peak near the end of the travel of the charged particle Linear Energy Transfer The linear energy transfer (LET) is the amount…
Radioactive Decay
Fig. 2.1 Isometric transition of 99mTc. Ten percent of the decay follows internal conversion. Gamma (γ)-Ray Emission The common mode of an isomeric transition from an upper energy state of a…
Gas-Filled Detectors
Fig. 7.1 A schematic diagram of a gas-filled detector illustrating the principles of operation At very low voltages, the ion pairs do not receive enough acceleration to reach the electrodes…
Digital Computers in Nuclear Medicine
Fig. 11.1 Basic components of a computer The signals, i.e., electrical pulses from a scintillation camera, are obtained in analog form and are digitized by the digital computers for further…
Radiation Regulations and Protection
Fig. 16.1 Various radiation caution signs and labels Caution: Radiation Area. This sign must be posted in radiation areas. Caution: High Radiation Area or Danger: High-Radiation Area . This sign…
Gamma Cameras
Fig. 9.1 A schematic diagram of a gamma camera. PHA pulse-height analyzer; PM photomultiplier Fig. 9.2 A typical single-head gamma camera. (Courtesy of Siemens Medical Solutions USA, Inc.) The operational…
