Chapter 1 Flashcards
Who was awarded the first Nobel Prize for physics in 1901 for his experimental work with radiation?
D) W. C. Roentgen
Wilhelm Conrad Roentgen discovered the x-ray on November 8, 1895.
Who is credited with introducing the bitewing radiograph?
B) H. R. Raper
Howard Riley Raper introduced bitewing radiographs in 1925.
Who developed the hot cathode ray tube?
A) W. D. Coolidge
William David Coolidge developed the shockproof hot cathode tube in 1913.
Who developed the first digital imaging system?
B) F. Mouyen
Francis Mouyen developed the first digital imaging system called RadioVisioGraphy in 1987.
What New Orleans dentist first made practical use of x-rays in the treatment of dental patients?
D) C. E. Kells
C. Edmund Kells took the first dental radiograph on a living subject in the U.S.
Early researchers working in the field of radiography were not aware that continued exposure to x-rays produced accumulations of radiation effects in the body because x-rays are invisible.
A) Both the statement and reason are correct and related.
Researchers were unaware of the accumulations because x-rays are invisible.
The most significant advancement in the early days of radiography came in 1913 when W. D. Coolidge
D) introduced an x-ray tube that allowed for an x-ray output that could be predetermined and accurately controlled
The Coolidge tube was a major advancement in radiography.
The first dental radiograph was produced using an exposure time of _____ minutes.
25
Dr. Otto Walkhoff held the film in his mouth for 25 minutes.
What component of the dental x-ray machine limits the size of the x-ray beam to the approximate size of the image receptor?
C) A rectangular PID
A rectangular position indicating device (PID) is used for this purpose.
In which decade did panoramic radiology become popular?
1960s
The panoramic x-ray machine was introduced in the 1960s.
Which of the following is not true regarding cone beam volumetric imaging (CBVI)?
A) It images a single selected plane of tissues.
B) It uses less radiation than a panoramic radiograph.
C) It is designed specifically for imaging dental applications.
D) It is purported to become the gold standard for imaging certain oral conditions.
B) It uses less radiation than a panoramic radiograph.
CBVI uses more radiation than a panoramic radiograph.
Early dental film required long exposure times because _____ was only on one side.
the emulsion
Early film had emulsion on only one side, necessitating longer exposure times.
Each of the following is an advantage of digital imaging except one. Which one is the exception?
A) It reduces radiation over film-based radiography.
B) It eliminates the need for the darkroom and processing chemistry.
C) It allows the use of pointed cones without radiation hazards.
D) It avoids the need for disposal of hazardous materials such as lead foils from film packets.
C) It allows the use of pointed cones without radiation hazards.
Pointed cones are no longer acceptable due to radiation scattering.
The bisecting technique was the first and earliest radiographic technique for exposing intraoral radiographs because the bisecting technique is based on the rule of isometry.
A) Both the statement and reason are correct and related.
B) Both the statement and reason are correct but not related.
C) The statement is correct, but the reason is not.
D) The statement is not correct, but the reason is correct.
E) Neither the statement nor the reason is correct.
B) Both the statement and reason are correct but not related
This is not the reason it was the first technique.
Which radiographic technique is less complicated and produces better quality radiographic images?
B) Paralleling
The paralleling technique is generally preferred for its simplicity and image quality.
The rule of isometry is the basis for what dental radiographic technique?
A) Bisecting
B) Paralleling
C) Panoramic
D) Digital
E) Computed tomography
A) Bisecting
The bisecting technique is based on the rule of isometry.
Which radiographic technique is less complicated and produces better quality radiographic images?
Paralleling technique
The paralleling technique is preferred for its simplicity and quality of images.
The rule of isometry is the basis for what dental radiographic technique?
Bisecting technique
A. Cieszyński is credited for suggesting the bisecting technique in 1907.
Each of the following is a potential use of dental radiographs except one. Which one is the exception?
Assessing patient self-care
Home care is best determined during a visual clinical examination.
Producing radiographs of the teeth and/or the oral cavity is called _______.
radiography
Dental assistants and dental hygienists can perform all of the following except _______.
A) Exposing radiographs
B) Processing radiographs
C) Mounting radiographs
D) Prescribing radiographs
E) Evaluate radiographs
D) prescribing radiographs
The positioning indicating device (PID) is sometimes called a “cone” because the PID of early dental x-ray machines was of a pointed shape.
A) Both the statement and reason are correct and related.
B) Both the statement and reason are correct but not related.
C) The statement is correct, but the reason is not.
D) The statement is not correct, but the reason is correct.
E) Neither the statement nor the reason is correct.
A) Both the statement and reason are correct and related.
Who was awarded the first Nobel Prize for physics?
William Conrad Roentgen
He received it in 1901 for the discovery of the x-ray.
C. Edmund Kells encouraged the practical use of radiographs in dentistry. True or False?
TRUE
The radiographer should help the patient hold the image receptor in place during exposure. True or False?
FALSE
In the early 1900s, dental patients would have to be sent to hospitals or a physician’s office to have a dental radiograph exposed. True or False?
TRUE
Early dental x-ray machines were an electrical hazard. True or False?
TRUE
Pointed cones should be used to direct radiation from the x-ray tube to the patient. True or False?
FALSE
Dental x-ray film available today is coated with emulsion on both sides. True or False?
TRUE
The bisecting technique is the technique of choice for intraoral radiography. True or False?
FALSE
Digital imaging systems can reduce radiation dosage more than film-based radiography. True or False?
TRUE
A radiograph is an image produced by exposure to x-rays. True or False?
TRUE
Computed tomography eliminates the use of radiation to produce an image. True or False?
FALSE
The PID is used to direct the useful beam of radiation. True or False?
TRUE
Who first determined that x-rays would play a role in dentistry?
Dr. Otto Walkhoff
Who was the first person to put the dental x-ray into practical use in dentistry?
C. Edmund Kells
Who developed the hot cathode ray tube?
William David Coolidge
Which radiograph displays the entire dentition and surrounding structures?
Panoramic radiograph
What is the technique of choice for intraoral radiography?
Paralleling technique
In dental digital imaging systems, what replaces film?
Sensors
What medical imaging modality records a selected plane of tissues?
Computed tomography (CT) scan
What is the name of the device that functions to direct the x-ray beam toward the patient?
Position indicating device (PID)
What are the two techniques for exposing intraoral dental radiographs?
Bisecting technique, Paralleling technique
