What's your frequency?
Regarding X-ray beam quality and Radiation characteristics, we want ( ) wavelengths, ( ) frequency.
What is shorter and higher?
Increase the mA and kilovoltage for increased density, making the image appear to be this.
What is darker?
X-ray beam quantity is controlled by this.
What is milliamperage , (mA)?
Quality is controlled by this.
What is kilovoltage?
This contains the leaded glass housing for the anode and cathode.
What is x-ray tube?
This determines energy and penetrating power of radiation.
What is wavelength?
This is defineed as the product of the quantity and quality per unit area per unit time of exposure.
What is x-ray beam intensity?
The number of x-rays produced in the dental unit.
What is quantity?
Image produced with a higher kilovoltage exhibits low this and many shades of gray.
What is contrast?
This metal plate with an opening, can be used to restrict the size of the beam.
What is a lead collimating device?
Interval of time during which x-rays are produced. It is also 1/60th of a second resulting from alternating current.
What are impulses?
The thickness of a particular material that reduces the intensity by half.
What is HVL, half-value layer?
In dental radiography, mA's ranges from these two numbers. If greater than this, excessive heat will be produced.
What is 7-15?
Increasing this would produce x-rays with greater energy, shorter wavelengths and more penetrating ability
What is kilovoltage?
Step-up or Step-down! This alters the voltage of the incoming electrical current and then routes the electrical energy to the x-ray tube.
What is a transformer?
An inverse relationship, increasing mA requires decrease this.
What is exposure time?
Target-surface (source to patient's skin) Target-object (source to patient's tooth) Target-receptor (source to receptor) These are all examples of how density of the x-ray beam is affect by this.
What is distance?
Increasing milliamperage increases the temperature of the cathode filament, resulting in an increased number of these at the anode.
What are electrons?
In relation to kilovoltage peak and contrast, low kVP (65-70) contains many black and white areas. Good for detecting these.
What is caries.
Sheets of this type of meta, 0.5-mm-thick are placed in the path of the x-ray beam, and act as a filter of the longer wavelength x-rays.
What are aluminum disks?
This states that when the distance is doubled, the beam is one quarter as intense.
What is Inverse Square Law?
The inverse square law is a mathmatical formula showing that as this increases, the intensity of the x-ray beam decreases.
What is distance?
Increasing the milliamperage has this effect on the density of an image.
What is an increase?
High kVP (greater or equal to 90) containing many shades of gray and are good for detecting these two diseases.
What is periodontal, and periapical, absesses?
This portion of the x-ray tubehead aims and shapes the x-ray beam.
What is the position-indicating device, or PID?