Dental Radiology Exam Study Guide with Complete Solutions

Dental Radiology Exam Study Guide with Complete Solutions Discovered x-ray in 1895 - Answer️️ -Wilhelm Roentgen Production of ions - Answer️️ -Ionization Atom that gains or loses electron and becomes electrically unbalanced - Answer️️ -Ion When electron is removed from An atom in ionization process - Answer️️ -Ion pair results Ion pair - Answer️️ -1. Atom becomes positive ion 2. Ejected electron becomes negative ion Radiation that is capable of producing ions by removing or adding an electron to an atom - Answer️️ -Ionizing radiation X-rays produce? - Answer️️ -Ionization Tiny particles of matter that possess mass and travel in straight lines at high speeds - Answer️️ -Particulate radiation Particulate radiation - Answer️️ -1. Electrons 2. Beta particles 3. Cathode rays ©SOPHIABENNET@2024/2025 Tuesday, August 20, 2024 10:21 AM 2 4. Alpha particles 5. Neutrons 6. Protons Propagation of wave-like energy (without mass, without particles) through space or matter - Answer️️ -Electromagnetic radiation Electromagnetic radiation - Answer️️ -1. Cosmic rays 2. X-rays 3. Microwaves, radio waves 4. Gamma rays 5. Ultraviolet rays 6. Visible light Speed of wave - Answer️️ -Velocity Distance bt crest of one wave to crest of next wave - Answer️️ - Wavelength Number of wavelengths that pass a point in a certain amount of time - Answer️️ -Frequency Electromagnetic ionizing radiation of very short wavelength resulting from the bombardment of tungsten by highly accelerated electrons in a vacuum - Answer️️ -X-ray X-Ray tube contains - Answer️️ -1. Protective leaded glass housing ©SOPHIABENNET@2024/2025 Tuesday, August 20, 2024 10:21 AM 3 2. Cathode 3. Anode Protective leaded glass housing - Answer️️ -1. Tube enclosure with all air removed, shielding prevents radiation leakage 2. High vacuum glass tube surrounded by refined oil with high insulating powers, oil helps to absorb excess heat Made of tungsten filament and molybdenum cup - Answer️️ -Cathode Charge of cathode - Answer️️ -Negative Heated to give off cloud of electrons - Answer️️ -Filament -thermionic emission Focuses electrons toward the anode - Answer️️ -Cup Supplies electrons necessary to generate x-rays - Answer️️ -Cathode Made of a copper arm and focal spot - Answer️️ -Anode Charge of anode - Answer️️ -Positive Focal spot is made of - Answer️️ -Tungsten target Action of anode - Answer️️ -Converts bombarding electrons into x-Ray photons What happens when electrons strike tungsten target - Answer️️ -Energy of motion is converted to x-Ray energy and heat ©SOPHIABENNET@2024/2025 Tuesday, August 20, 2024 10:21 AM 4 How much of energy is lost as heat - Answer️️ -99% Quality of C-Ray beam - Answer️️ -kVp Quality refers to - Answer️️ -Penetrating power of beam KVp regulates - Answer️️ -Speed of electron traveling from cathode to anode Higher kVp means - Answer️️ -Faster electrons Higher kVp=harder x-rays= - Answer️️ -Short wa