DEH 1004 Radiology Exam 1 PDF

DEH 1004 Radiology Exam 1 - How do the Positioning indicating device (PID), Collimator, Filter effect the radiation exiting from the tube head? - Who is considered the Primary Historical Figure in radiation history and why? - What are the advantages and disadvantages of digital over...

DEH 1004 Radiology Exam 1 - How do the Positioning indicating device (PID), Collimator, Filter effect the radiation exiting from the tube head? - Who is considered the Primary Historical Figure in radiation history and why? - What are the advantages and disadvantages of digital over film? - How do the Coherent effect, Photoelectric effect, Compton effect create new or scattered x-rays? - What are the components of the dental xray machines? What are they for? - What is the difference between radioactivity and producing radiation? - On the Electromagnetic spectrum which form of energy/waves are ionizing radiation? - What are the properties of Electromagnetic energy? - How to you measure the speed of electromagnetic energy? - What are the components of the film packet that protects the film? What are they for? - What are the components of the dental film itself? - What safety measure are required to be built into machines to help the clinician control the radiation exposure to themselves? - Know the definitions of the following terms: exposure amount, absorbed dose, dose equivalent, background radiation. What are the units used to measure these? - Know the following terms: characteristic radiation, General/bremsstrahlung radiation, coherent scattering. - Know the definitions of the following: Kilovoltage, Milliamperage - Know the definitions of, atom, electron, neutron, molecule. - What is the proper sterilization technique for the RINNS holding device? - What are the specifications and use recommendations of the lead vest protection for the patient? - What are the impulse equivalent numbers in relation to seconds? - *What is the Système Internationale* (SI) and what are the units that belong to this system? - How do low dose, moderate dose and high doses of ration effect cells? - How do cells heal from radiation and in what timeline? - How are cells effect by Indirect and Direct radiation theories? - What are film speeds used for, what is the fastest most common type? - What are the film sizes, film and digital? - What are the principles of ALARA? - What are silver halide crystals and how do they function in film? - What are the chemicals used for developing and fixing radiograph films? - Define the key terms: Sharpness, Contrast (long and short), Density. Density- degree of darkness or image blackening; results when x-rays strike sensitive crystals in the film emulsion Contrast- many shades of gray that separates the dark and light areas High=few shades of grey Low= many shades of grey Sharpness- geometric factor that reers to detail and clarity of the outline of structures shown on a radiograph; can be affected by pixel size and distribution. - What are the three goals for a diagnostic image? 1. All part of the structures recorded must be imaged as close to their natural shapes and sizes-distortion at a minimum 2. The area examined must be imaged completely with enough surrounding tissue to distinguish between the structures 3. The radiograph should be free of errors and show proper density, contrast, and definition - How do Sharpness, Contrast (long and short) and Density relate to the look of the image? Be able to identify the images of these. What do we "want" in exposure factors when taking images? - In words describe the inverse square law. - Be able to label the parts of a tube head from the image in the PowerPoint.