Chapter 38 Radiography
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
|
|
||||
|---|---|---|---|---|---|
| show | Concept of radiation protection that states that all exposures should be kept “as low as reasonably achievable.”
🗑
|
||||
| Anode | show 🗑
|
||||
| show | The basic unit of matter.
🗑
|
||||
| show | “Braking radiation.” The sudden deceleration of electrons as they interact with highly positively charged nuclei.
🗑
|
||||
| show | The negative electrode
Consists of a tungsten wire filament in a cup-shaped holder made of molybdenum
Supplies the electrons necessary to generate x-rays
The tungsten filament produces electrons when heated
The molybdenum cup focuses electrons into a
🗑
|
||||
| show | X-rays at the center of the beam.
🗑
|
||||
| Contrast | show 🗑
|
||||
| Control panel | show 🗑
|
||||
| show | The overall darkness or blackness of an image.
🗑
|
||||
| Dental radiography | show 🗑
|
||||
| show | A filmless method of capturing an image and displaying it by using an image receptor, an electronic signal, and a computer to process and store the image.
🗑
|
||||
| Distortion | show 🗑
|
||||
| show | The amount of energy absorbed by tissues.
🗑
|
||||
| show | A device used to detect and measure an accumulated dosage of radiation.
🗑
|
||||
| Electron | show 🗑
|
||||
| show | The ability to do work.
🗑
|
||||
| show | Flexible arm that is attached to the x-ray tubehead.
🗑
|
||||
| show | Film-based or digitally produced recordings of anatomic structures.
🗑
|
||||
| show | A recording medium for an image, normally film, phosphor storage plate (PSP), or a digital sensor.
🗑
|
||||
| Intensity | show 🗑
|
||||
| ion | show 🗑
|
||||
| show | Process by which electrons are removed from atoms, causing the harmful effects of radiation in humans.
🗑
|
||||
| show | radiation Radiation that produces ionization, resulting in harmful effects.
🗑
|
||||
| show | Highest voltage of x-ray tube used during an exposure and it is used to control the penetrating power of the x-ray beam
It is used to control the penetrating power of the x-ray beam. Dental x-ray machines generally operate at 70 or 90 kVp
🗑
|
||||
| Latent period | show 🗑
|
||||
| show | Device used to protect the reproductive and blood-forming tissues from scatter radiation.
🗑
|
||||
| Magnification | show 🗑
|
||||
| Master switch, indicator light, selector buttons, exposure button | show 🗑
|
||||
| show | Anything that occupies space and has form or shape.
🗑
|
||||
| Milliampere (mA) | show 🗑
|
||||
| Penumbra | show 🗑
|
||||
| Personal radiation monitoring badge | show 🗑
|
||||
| show | A minute (tiny) bundle of pure energy that has no weight or mass.
🗑
|
||||
| Primary beam | show 🗑
|
||||
| Primary radiation | show 🗑
|
||||
| Quality of x-ray beam | show 🗑
|
||||
| show | The number of x-rays produced in the dental unit; the quantity of x-rays produced is controlled by milliamperage.
🗑
|
||||
| Radiation | show 🗑
|
||||
| show | Image produced on photosensitive film by exposing the film to radiation and then processing it.
🗑
|
||||
| show | The science or study of radiation as used in medicine.
🗑
|
||||
| show | A form of secondary radiation that occurs when an x-ray beam has been deflected from its path by interaction with matter.
🗑
|
||||
| Secondary radiation | show 🗑
|
||||
| Sensor | show 🗑
|
||||
| show | A measure of how well an image reproduces the fine details or outline of an object.
🗑
|
||||
| show | effects Effects of radiation that cause illness and are responsible for poor health (such as cancer, leukemia, and cataracts) but are not passed on to offspring.
🗑
|
||||
| Thyroid collar | show 🗑
|
||||
| Tubehead | show 🗑
|
||||
| Tungsten target | show 🗑
|
||||
| X-radiation | show 🗑
|
||||
| show | Wilhem Conrad Roentgen
🗑
|
||||
| Who was the first person to make practical use of x-rays in dentistry? | show 🗑
|
||||
| show | The production of removing electrons from atoms, creating ions, and causing harmful effects of radiation in humans
🗑
|
||||
| What are the primary components of an x-ray machine? | show 🗑
|
||||
| Name the negative electrode inside the x-ray tube | show 🗑
|
||||
| Name the positive electrode inside the x-ray tube | show 🗑
|
||||
| What does the control panel contain? | show 🗑
|
||||
| show | something abnormal, usually in the body
🗑
|
||||
| Cat NAP | show 🗑
|
||||
| Wave concept | show 🗑
|
||||
| Metal housing | show 🗑
|
||||
| show | Made of leaded glass or aluminum
Keeps the oil in the tubehead, and acts as a filter for the x-ray beam
🗑
|
||||
| X-ray tube | show 🗑
|
||||
| show | Alters the voltage of incoming electrical current
🗑
|
||||
| Aluminum filter/Aluminum disks | show 🗑
|
||||
| show | A metal disc with a small opening in the center, 2”
control the size and shape of the x-ray beam as it leaves the tubehead
🗑
|
||||
| show | the open-ended, lead-lined cylinder
extends from the opening of the metal housing
used to aim the x-ray beam
🗑
|
||||
| show | Measures about 6 inches long by 1 inch in diameter
Includes:
Leaded-glass housing
Cathode
Anode
🗑
|
||||
| show | Prevents x-rays from escaping in all directions
One area has a “window” that permits the x-ray beam to exit the tube and directs the beam toward the aluminum disks, lead collimator, and PID
🗑
|
||||
| show | Lead-lined cylinder
Used to aim the tubehead
Placed as close as possible to the patient’s face
Cylindrical or rectangular
8 inch or 16 inch in length
🗑
|
||||
| show | Exposure button controls the flow of electricity to generate the x-rays
Exposure time is measured in fractions of a second, called impulses
60 impulses = 1 second; 30 impulses = 0.5 second
🗑
|
||||
| show | Primary radiation
Secondary radiation
Scatter radiation
🗑
|
||||
| show | is made up of the x-rays that come from the target of the x-ray tube. Primary radiation is often referred to as the useful beam
🗑
|
||||
| What is Secondary radiation? Types of Radiation | show 🗑
|
||||
| show | is a form of secondary radiation that occurs when an x-ray beam has been deflected from its path through interaction with matter. it is deflected in all directions by patient tissues and travels to all parts of the patient’s body and to all areas of the d
🗑
|
||||
| IMAGE CHARACTERISTICS | show 🗑
|
||||
| What is Radiolucent structures? | show 🗑
|
||||
| show | Body structures that radiation Does Not easily pass through appear radiopaque (white or light gray) on an image
For example, tooth enamel, dense areas of bone, and metal restorations
🗑
|
||||
| show | OBJECT THAT ALLOW X-RAYS TO PASS THROUGH. IMAGE APPEARS DARK.
🗑
|
||||
| show | DOES NOT ALLOW X-RAYS TO PASS THROUGH. IMAGE APPEARS LIGHT.
🗑
|
||||
| show | 1-quality,
2- quantity,
3- intensity
this alow us to change the image of the radiopaque and the image detail as well
🗑
|
||||
| DIAGNOSTIC QUALITY IMAGES | show 🗑
|
||||
| show | the qualities necessary for a good image
🗑
|
||||
| show | Old machines adjusted manually
🗑
|
||||
| show | QUALITY IS PENETRATING ABILITY, OR STRENGTH, OR POWER. HOW STRONG IS YOUR BEAM IS DETERMINED BY KV.
🗑
|
||||
| What are the controlled of The quality or wavelength and energy of the x-ray beam? | show 🗑
|
||||
| when do you need to use A higher kilovoltage? | show 🗑
|
||||
| WHAT IS IMGE DENSITY ? | show 🗑
|
||||
| show | the use of 7 to 15 mA is required; a setting above 15 mA is not recommended because it would cause excessive heat production in the x-ray tube.
🗑
|
||||
| show | Kv = quaLity
mA=Quanlity
🗑
|
||||
| What is Intensity? | show 🗑
|
||||
| What is thh intensity of the x-ray beam is affected ? | show 🗑
|
||||
| show | The image on a radiograph appears in a range of shades from black to white with multiple shades of grayg. This range is referred to as the gray scale
Referred to as grey scale
🗑
|
||||
| show | HIGH CONTRAST... DARKER BLACK AND LIGHTER WHITE, FEWER SHADES INBETWEEN. HIGH CONTRAST, SHORT SCALE CONTRAST.HIGHER KVP
🗑
|
||||
| what is LOWER CONTRAST? | show 🗑
|
||||
| show | medium of high and lower contrast
🗑
|
||||
| show | 90 kVp setting
Requires less exposure time
Image low contrast
More shades of gray
🗑
|
||||
| show | 70 kVp
Requires more exposure time
Image high contrast
Fewer shades of gray
🗑
|
||||
| show | is the overall blackness or darkness of a film. An image with the correct density enables the dentist to view black areas (air spaces), white areas (enamel, dentin, and bone), and gray areas (soft tissues).
🗑
|
||||
| What is controlled the degree of density? | show 🗑
|
||||
| what is Correct density enables the dentist to view? | show 🗑
|
||||
| show | Sharpness
Distortion:
Magnification
🗑
|
||||
| show | -How well an image reproduces fine detail
-Detail, sharpness, or definition
-Penumbra
🗑
|
||||
| show | Fuzzy or blurred area surrounding an image
🗑
|
||||
| show | Focal spot size
Smaller focal spot results in a sharper image
Film composition
Fast film speed results in less sharp detail
Movement
Slightest movement of patient, receptor, or PID
🗑
|
||||
| show | is called penumbra
🗑
|
||||
| show | refers to the disproportionate change in the size of images that is caused by excessive or insufficient vertical angulation
🗑
|
||||
| show | refers to the proportionate enlargement of a dental image.
🗑
|
||||
| Name the types of Radiation. | show 🗑
|
||||
| show | Radiopaque does not allow passage of x-rays, images appear white/light
Radiolucent does allow passage of x-rays, images appear black/dark
🗑
|
||||
| show | Air space, soft tissues, cavities, abscesses, dental pulp
🗑
|
||||
| Give examples of structures that appear radiopaque on a radiograph. | show 🗑
|
||||
| What are the three characteristics of the x-ray beam? | show 🗑
|
||||
| Which exposure factor controls contrast? | show 🗑
|
||||
| show | The overall darkness or blackness of a film
🗑
|
||||
| Radiation effects | show 🗑
|
||||
| ionizing radiation | show 🗑
|
||||
| Tissue damage | show 🗑
|
||||
| show | Results in the harmful effects of x-rays in humans
Can cause disruption of cellular metabolism and permanent damage to living cells and tissues
Atoms that lose electrons become positive ions
Unstable structures capable of interacting with and damaging
🗑
|
||||
| Biologic effects | show 🗑
|
||||
| Cumulative effects | show 🗑
|
Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Created by:
10223551287023303
Popular Radiology sets