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jeopardy review

  • Turns Ratio

    • The number of turns in the secondary coil compared to the primary coil determines whether current increases or decreases.

    • This ratio is crucial for transformers in electrical circuits and is central to understanding electromagnetism.

  • Types of Rays

    • Two types of electromagnetic waves that were mentioned include:

    • X-ray

      • A form of radiation originating from electrons.

    • Gamma Ray

      • A form of radiation originating from the nucleus of an atom.

  • Exposure Termination

    • In radiography, a device is used to terminate exposure when adequate radiation is reached at the image receptor.

    • Understanding these terms is vital for ensuring patient safety and image quality.

  • Anode Target for X-rays

    • Common materials for use in x-ray tube anodes include:

    • Copper

    • Gold

    • Rhodium

    • Molybdenum

    • Each material has specific properties affecting the efficiency and quality of x-ray generation.

  • Kinetic Energy

    • Kinetic energy of electrons moving from the cathode to anode can be increased by adjusting the vMA (Voltage MA) Selector which controls the filament circuit.

    • This adjustment determines the number of electrons boiled from the filament.

  • Wave Equation

    • Formula:

    • v = f imes \lambda

      • Where:

      • v = velocity

      • f = frequency

      • \lambda = wavelength

    • This equation is fundamental in understanding the behavior of electromagnetic waves.

  • Energy Form

    • Heat is a form of energy related to the movement of molecules, known as thermal energy.

  • Frequency Definition

    • Frequency is defined as the number of cycles or wavelengths of a simple harmonic motion per unit time, typically expressed in Hertz (Hz).

  • X-ray Beam Quality

    • If 5% of the x-ray beam is transmitted through an object, then 95% has been attenuated.

    • Attenuation affects image contrast and clarity.

  • Electromagnetic Radiation Measurement

    • Measurements of electromagnetic radiation are often expressed in traditional units such as the Röntgen (R).

  • Gravity Law

    • The law states that radiation intensity at a given location is inversely proportional to the square of the distance from the radiation source.

  • Medical Imaging

    • Medical imaging is the largest source of human exposure to ionizing radiation in the US.

    • Understanding it is crucial for informed practices in healthcare and patient safety.

  • Emission Spectrum Quality

    • Higher quality of the x-ray beam occurs when the peak of the emission spectrum shifts to the right side, indicating an increase in emitted energy and overall beam quality.

  • Factors Affecting Image Quality

    • Key contributors to image quality in radiography include:

    • The angle of the target

    • Distance from the film

    • Size of the film or image receptor.

  • Study Ohm’s Law