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Porto- Radiology
Test 1 Material
100
Photography
Undergraduate 1
09/27/2012

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Cards

Term
Radiation?
Definition
Is energy carried by waves or streams of particles.
Term
X-Radiation?
Definition
High energy radiation produced by the collision of a beam of electrons with a metal target in an x-ray tube.
Term
X-Ray?
Definition
A beam of energy that has the power to penetrate substances and record image shadows on photographic film.
Term
Radiology?
Definition
The science or study of radiation as used in medicine.
Term
Radiograph?
Definition
A photographic image produced on film or digital sensor by the passage of x-rays through an object.
Term
Dental Radiograph?
Definition
A Photographic image produced on film by the passage of x-rays through teeth and related structures.
Term
Radiography?
Definition
The art and science of making radiographs by the exposure of film to x-rays.
Term
Dental Radiography?
Definition
The production of radiographs of the teeth and adjacent structures by the exposure of film to x-rays.
Term
What two things do Dental radiographs allow the dental professionals to do?
Definition
1. identify many conditions that may otherwise go undetected.
2.see conditions that cannot be seen clinically.
Term
Who was the "Father of X-ray"(Radiation)?
what year?
Definition
Wilhelm Conrad Roentgen
Nov. 8th 1895
Term
Who took the first Dental Radiograph?
Definition
Otto Walkoff
1895
Term
Who took the First Dental Radiograph on a Live Person?
Definition
C Edmund Kells
1895
Term
what is the incorrect term for a radiograph?
Definition
X-Ray
Term
When were the first standards for the manufacture of dental x-ray machines put into place?
Definition
1974
Term
Who regulates the manufacture and installation of dental x-ray machines?
Definition
The Federal Government
Term
Who regulates how Dental x-ray machines should be used
Definition
The State and Local Government
Term
What are two types of Dental X-Ray Machines?
Definition
1/ Intraoral
2/ Extraoral
Term
What 3 parts make up an Intraoral X-Ray Machine?
Definition
1. Tubehead
2. PID
3. Extension Arm
Term
What is Part of the X-ray machine contains the heavy metal housing?
Definition
Tubehead
Term
What does PID stand for?
Definition
Position Indicating Device
Term
What is an Open-ended Lead Lined Cylinder extending from the opening of the tubehead?
Definition
PID
Term
What is the main purpose of the PID?
Definition
To Aim and shape the X-ray beam
Term
what does the Extension arm on a Dental X-ray machine do?
Definition
Allows for positioning of the tubehead.
Term
What turns the x-ray machine on and off?
Definition
The control Panel
Term
What is a Film holder?
Definition
A device used to hold and align intraoral dental x-ray films in the mouth.
Term
what is the Beam Alignment device?
Definition
An instrument used to help the dental radiographer position the PID relative to the tooth and film.
Term
Name 4 Types of film Holders.
Definition
1. Styrofoam Bite Block
2. EEZEE-Grip
3. Uni-Bite (Uni-Grip)
4. Rinn XCP Film holders
Term
Name 2 types of Beam alignment devices.
Definition
1.Precision Film holders (metal collimating shields that restrict the size of the x-ray beam)
2. Rinn XCP Film holders
Term
Why do we take Dental Radiographs?(3)
Definition
- Necessary component of comprehensive care
-Essential for diagnostic purposes
-Enable the dental professional to identify many conditions that may otherwise go undetected.
Term
What are the 3 main USES of Dental Radiographs?
Definition
Detection- of disease, lesions, and conditions of the teeth and bones that cannot be identified clinically.
Confirming- suspected diseases
Localization- of lesions and foreign objects
Term
what is the primary benefit of Dental Radiographs?
Definition
To detect Disease
Term
Why is it essential to take Dental X-rays why diagnosing a patient?
Definition
Because the underlying structures that cannot be seen clinically must be noted before a diagnosis is made.
Term
What are a few things that you might notice on an x-ray that you couldn't see clinically?
Definition
missing teeth, extra teeth, impacted teeth, dental caries, periodontal disease, tooth abnormalities, tetained roots, cysts and tumors
Term
"Generally" who is a dental radiographer?
Definition
Anyone who positions, exposes and processes dental x-ray film
(including Knowledge and skill/ duties and responsibilities)
Term
What are the Knowledge and skill requirements for taking dental radiographs?
Definition
-Basic knowledge of Radiation History
-working knowledge of radiation physics, characteristics, biology, and protection.
-familiar with dental x-ray equipment, film, image characteristics,processing, and quality assurance.
- Patient management basics
-technique concepts and basic skills
Term
What are the seven duties and responsibilities of a Dental Radiographer?
Definition
1. Positioning and exposure of Dental X-ray film
2. Processing of dental x-ray films
3. Mounting and identification of dental radiographs
4. education of patients
5. Maintenance of darkroom facilities and processing equipment
6. Implementation and monitoring of quality control procedures.
7. Ordering of film and supplies
Term
What is an Intraoral Radiographic Examination?
Definition
a radiographic inspection of the teeth and intraoral adjacent structures
Term
what is Intraoral Film?
Definition
Film that is placed inside the mouth to examine the teeth and supporting structures.
Term
how many types of Intraoral Radiographic examinations are there? and what are they?
Definition
3:
Periapical, Interproximal(Bitewing), Occlusal
Term
What is the purpose of a Periapical Intraoral Radiograph?
Definition
used to examine the entire tooth and supporting bone.
Term
What type of film would you use with a PA Radiograph?
Definition
Periapical Film
Term
What technique(s) would you use foe PA Radiographs?
Definition
Paralleling and Bisecting
Term
What is the purpose of interproximal Radiographs?
Definition
To examine the crowns of both arches of teeth on a single film
Term
What type of film is used with interproximal Radiographs?
Definition
Bite-wing Film
Term
What technique is used to take interproximal radiographs?
Definition
Bite-wing technique
Term
What is the purpose of occlusal radiographs?
Definition
to examine large areas of the maxilla or the mandible on one film.
Term
what type of film is used with occlusal radiographs?
Definition
Occlusal Film
Term
What technique is used during occlusal radiographs?
Definition
Occlusal technique
Term
What does FMX stand for?
Definition
Full mouth x-rays (radiographs)
Term
How many radiographs are in a FMX?
Definition
20
Term
What are Dentulous and Edentulous Areas?
Definition
they are tooth-bearing areas of both Maxilla and Mandible/
Term
What is the basic diagnostic criteria for Intraoral Radiographs?
Definition
Must show:
1. Optimum Density (overall Darkness)
2. Contrast (shades of gray)
3. Definition
4. Detail
Term
When taking an image and trying to fit the diagnostic criteria you want to least amount of ___________ ?
Definition
Distortion
Term
FMX must include radiographs that show __ ____-________ ______
Definition
All Tooth-bearing Areas
Term
What must PA Radiographs show?
Definition
-the Entire crown
Term
What must BWX's Show?
Definition
must show open contacts
Term
what is an Extraoral Radiographic Examination?
Definition
A radiographic inspection of Large areas of the skull or jaws.
Term
What is Extraoral Film and what does it show?
Definition
It is Film placed outside the mouth and it shows a wide area.
Term
When would you as the clinician determine what kind of radiographs to take?
Definition
Based on the Medical History, Dental History, and Chief complaint for dental app.
Term
What is the Basic concept of what Digital imaging radiographs are?
Definition
an electronic sensor and computerized imaging system that produces x-ray images almost instantly on a computer screen.
Term
Digital Radiography?
Definition
Filmless imaging system, computer file containing pictorial information.
Term
What does it mean to Digitize something?
Definition
To convert the image to digital form then processed by a computer.
Term
what is a Pixel?
Definition
Discrete unit of digital information.
Term
what are the 2 types of digital imaging?
Definition
CDC (charged coupling device_
SPI (storage phospor imaging)
Term
What is the Purpose and USE of DIGITAL Dental Radiographs?
Definition
1. Diagnose- dental disease
2. Detect- lesions, disease, and conditions of the teeth and surrounding structures.
3. Confirm-classify suspected disease.
4. Provide- info. during dental precedures
5. Evaluate: growth and development
6. Illustrate- changes in disease status
7. Document- the condition of a patient at a specific point in time.
Term
Digital Radiogrpahy?
Definition
Method of capturing a radiographic image using a sensor, breaking it into electronic pieces, and presenting and storing the image using a computer.
Term
Who is a digital radiographic image captured? (4 steps)
Definition
1. sensor is placed inside the mouth
2. x-ray beam strikes the sensor
3. electronic charge is made producing image
4. image is digitized and viewed on computer.
Term
which is more sensitive to radiation, Film or sensor?
Definition
Digital Sensor
Term
Roughly what percentage of exposure time is reduced with Digital Radiographs compared to E-Speed Film?
Definition
50% to 80%
Term
What is a CCD (charged Coupling Device)?
Definition
A solid silicon chip with an electronic circuit embedded in it. It is sensitive to X-rays or light. When the photons hit the CCD they cause electrons to be released from the silicone resulting in an electrical charge. A latent image is made of the receptor and then is digitized to the computer.
Term
What is a digital sensor?
Definition
is a digital imaging receptor that is linked by a fiber optic cable to a computer.
or
the Digital imaging sensor is wireless, when it digitizes the image to a computer.
Term
What is the patients benefit of digital radiographs?
Definition
that the Patient can see the images almost instantly so they understand better of what you are seeing.
Term
what does the computer do when the pixels are sent from the sensor to the monitor?
Definition
the computer digitizes, processes, and stores the information.
Term
How many seconds does it take the computer to read the image sent from the sensor?
Definition
0.5-120 seconds
Term
What is a health factor downfall to the sensor?
Definition
The digital sensor cannot be sterilized, only disinfected.
Term
How is the sensor held in the mouth?
Definition
by a bite-block of sorts or devices such as the XCP that aim the beam to the sensor.
Term
What are the advantages to Digital Radiography?
Definition
-reduced x-radiation exposure
-super gray scale resolution
-increase speed of viewing the image with or without the patient.
-NO chemicals needed to process
-increased the efficiency by staying in one room.
-enhancement of diagnostic image
-effective patient education tool
Term
What are the disadvantages of digital radiography?
Definition
-initial set up cost
- sensor size
- infection control (cant sterilize sensor)
Term
What does Quality refer to?
Definition
the Penetrating ability of the x-ray Beam.
Term
What controls the quality?
Definition
Kilovoltage (KVP)
Term
What determines the energy and penetrating ability of an x-ray beam?
Definition
The Wavelength:
-Shorter= more penetrating
-longer= less penetrating
Term
What is Voltage? and what does it affect?
Definition
-Is the speed of the electrons.
- how fast the electrons travel from cathode to anode.
Term
How many volts equal one Kilovolt?
Definition
1000 volts
Term
What is the range of kV that Dental Radiography requires?
Definition
65-100kV
Term
What kV would be considered inadequate penetration?
Definition
<65kV
Term
What kV would be considered overpenetration?
Definition
>100kV
Term
what is kVp?
Definition
is the maximum or peak Voltage
Term
If a Machine has a kVp of 90 how many volts does it have?
Definition
90,000 volts
Term
When you increase kVp you are increasing the __________ of the x-ray beam?
Definition
Penetrating ability
Term
If all factors are constant and just the kV is altered what is affected int the image?
Definition
Increase kV= overall darker image density
decrease kV= overall lighter image density
Term
What is Density?
Definition
The overall Darkness of an image
Term
What happens to the contrast when you increase the kVp?
Definition
Low contrast ( large gray scale )
Term
What happened to the kVp if the image has a lot of just blacks and whites?
Definition
The kVp was decreased resulting in a higher contrast image.
Term
Low contrast=?
Definition
Lots of Grays
Term
High Contrast=?
Definition
Black
Term
what is an Example of a low kVp setting to create a high contrast film?
Definition
65-70kVp
Term
What is an example of a high kVp to create a low contrast film?
Definition
greater than or equal to 90kVp
Term
What happens to Density as kVp goes up or Down?
Definition
UP: kVp increases, Density increases
Down: kVp decreases, Density Decreases
Term
What is the only exposure factor that directly impacts contrast?
Definition
kVp
Term
what is another way to say impulses?
Definition
exposure time
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