DASA RADIOGRAPHY EXAM
NEWEST UPDATE 2025 WITH
QUESTIONS AND CORRECT
ANSWERS
The Radiographic Image - CORRECT ANSWER Depicted by varying shades of gray,
black, and white areas.
Radiolucent - CORRECT ANSWER dark areas on the radiograph where photons
penetrated open spaces or soft tissue reaching the x-ray film creating dark shadows.
Examples of Radiolucent - CORRECT ANSWER Caries, Porcelain, Abscesses, Cysts,
Soft Tissues, Sinuses.
Radiopaque - CORRECT ANSWER Light areas on radiograph where photos are
blocked from reaching the x-ray film by dense structures.
Examples of Radiopaque - CORRECT ANSWER Metallic restorations, bone, enamel,
dentin, ortho wires, gutta-percha, calculus.
Radiographic Density - CORRECT ANSWER The degree of darkness on a radiograph
How can Radiographic Density be manipulated? - CORRECT ANSWER Varying the
milliampere setting, Varying the kilovoltage peak setting, Varying exposure time.
Radiographic Contrast - CORRECT ANSWER The number of shades of gray seen on a
radiograph.
Distortion - CORRECT ANSWER Inaccuracy in the size or shape of the object in the
radiograph image.
Excessive Angulation - CORRECT ANSWER Causes the image to appear
foreshortened (shorter than the actual object)
Insufficient Angulation - CORRECT ANSWER When the image appears elongated
(longer than the actual object)
Radiographic Landmarks - CORRECT ANSWER Enamel, Dentin, Cementum. (densest
in the human body) Pulp Chambers and Root Canals. (soft tissues)
, Landmarks of the Maxilla - CORRECT ANSWER Formed by two maxillary processes, it
contains an air filter cavity within it called the maxillary sinus.
Maxillary molars - CORRECT ANSWER 3 roots
Maxillary first premolars - CORRECT ANSWER 2 roots
Landmarks of the Mandible - CORRECT ANSWER The Lower jaw is originally in two
pieces at birth.
Radiation Protection for the patient - CORRECT ANSWER Lead Apron
Dental Radiograph - CORRECT ANSWER Representation of a three dimensional object
used in dentistry to study and identify structures NOT VISIBILE TO THE NAKED EYE.
Radiography - CORRECT ANSWER Applying the basic sciences of PHYSICS AND
CHEMISTRY as they relate to photography.
Wilhelm Conrad Roentgen - CORRECT ANSWER German physicist, discovered x-rays
in 1895. X-rays are sometimes called "Roentgen Rays".
Otto Walkhoff - CORRECT ANSWER Made the FIRST DENTAL RADIOGRAPH in 1896
and experimented on himself.
Who was C. Edmund Kells? - CORRECT ANSWER First practitioner to take dental
radiograph on a LIVE PATIENT.
What happened to C. Edmund Kells due to his experiments? - CORRECT ANSWER He
repeatedly experimented on his hand which led to cancer. He eventually had his arm
amputated.
William Coolidge - CORRECT ANSWER Invented the X-RAY TUBE in 1913.
What are X-Rays? - CORRECT ANSWER Electromagnetic rays that are not detected
by any of the senses.
How fast do X-Rays travel? - CORRECT ANSWER X-Rays travel at the speed of light,
which is 186,000 miles per second.
Primary Radiation - CORRECT ANSWER Also known as DIRECT BEAM or PRIMARY
BEAM.
What is remnant radiation? - CORRECT ANSWER All of the radiation that reaches the
x-ray film passing through the object being radiographed.
What does remnant radiation produce? - CORRECT ANSWER The latent image, which
is not visible until the x-ray is processed.
NEWEST UPDATE 2025 WITH
QUESTIONS AND CORRECT
ANSWERS
The Radiographic Image - CORRECT ANSWER Depicted by varying shades of gray,
black, and white areas.
Radiolucent - CORRECT ANSWER dark areas on the radiograph where photons
penetrated open spaces or soft tissue reaching the x-ray film creating dark shadows.
Examples of Radiolucent - CORRECT ANSWER Caries, Porcelain, Abscesses, Cysts,
Soft Tissues, Sinuses.
Radiopaque - CORRECT ANSWER Light areas on radiograph where photos are
blocked from reaching the x-ray film by dense structures.
Examples of Radiopaque - CORRECT ANSWER Metallic restorations, bone, enamel,
dentin, ortho wires, gutta-percha, calculus.
Radiographic Density - CORRECT ANSWER The degree of darkness on a radiograph
How can Radiographic Density be manipulated? - CORRECT ANSWER Varying the
milliampere setting, Varying the kilovoltage peak setting, Varying exposure time.
Radiographic Contrast - CORRECT ANSWER The number of shades of gray seen on a
radiograph.
Distortion - CORRECT ANSWER Inaccuracy in the size or shape of the object in the
radiograph image.
Excessive Angulation - CORRECT ANSWER Causes the image to appear
foreshortened (shorter than the actual object)
Insufficient Angulation - CORRECT ANSWER When the image appears elongated
(longer than the actual object)
Radiographic Landmarks - CORRECT ANSWER Enamel, Dentin, Cementum. (densest
in the human body) Pulp Chambers and Root Canals. (soft tissues)
, Landmarks of the Maxilla - CORRECT ANSWER Formed by two maxillary processes, it
contains an air filter cavity within it called the maxillary sinus.
Maxillary molars - CORRECT ANSWER 3 roots
Maxillary first premolars - CORRECT ANSWER 2 roots
Landmarks of the Mandible - CORRECT ANSWER The Lower jaw is originally in two
pieces at birth.
Radiation Protection for the patient - CORRECT ANSWER Lead Apron
Dental Radiograph - CORRECT ANSWER Representation of a three dimensional object
used in dentistry to study and identify structures NOT VISIBILE TO THE NAKED EYE.
Radiography - CORRECT ANSWER Applying the basic sciences of PHYSICS AND
CHEMISTRY as they relate to photography.
Wilhelm Conrad Roentgen - CORRECT ANSWER German physicist, discovered x-rays
in 1895. X-rays are sometimes called "Roentgen Rays".
Otto Walkhoff - CORRECT ANSWER Made the FIRST DENTAL RADIOGRAPH in 1896
and experimented on himself.
Who was C. Edmund Kells? - CORRECT ANSWER First practitioner to take dental
radiograph on a LIVE PATIENT.
What happened to C. Edmund Kells due to his experiments? - CORRECT ANSWER He
repeatedly experimented on his hand which led to cancer. He eventually had his arm
amputated.
William Coolidge - CORRECT ANSWER Invented the X-RAY TUBE in 1913.
What are X-Rays? - CORRECT ANSWER Electromagnetic rays that are not detected
by any of the senses.
How fast do X-Rays travel? - CORRECT ANSWER X-Rays travel at the speed of light,
which is 186,000 miles per second.
Primary Radiation - CORRECT ANSWER Also known as DIRECT BEAM or PRIMARY
BEAM.
What is remnant radiation? - CORRECT ANSWER All of the radiation that reaches the
x-ray film passing through the object being radiographed.
What does remnant radiation produce? - CORRECT ANSWER The latent image, which
is not visible until the x-ray is processed.
