Radiology Quiz 1

Question 1

What are the 10 properties of

X-Rays?

Answer 1

1. Produced by the conversion of electric energy into radiation
2. Invisible
3. Most powerful beams travel in straight lines
4. Can penetrate opaque tissues and structures (skin/teeth/bone)
5. Can affect a photographic film/digital sensor to produce and image on film or a computer
6. Can affect living tissue and cells
7. Travel at the speed of light = 186,000mps
8. Man-made
9. Ionizes gas, liquids, solids
10. Weightless

Question 2

Who is William Conrad Roentgan?

Answer 2

German physicist, discovered X-rays on NOVEMBER 8th, 1895

Used crooked tube which took 45 min per exposure

Question 3

Who is William Rollins?

Answer 3

1896, developed the first dental X-ray unit

Question 4

Who is Otto Walkoff?

Answer 4

1896, first person to take a dental X-ray, reduced time to 25 min per exposure

Question 5

Who is C.Edmund Kells?

Answer 5

1896, first dentist to expose his patients with radiation

Question 6

Who is William Coolidge?

Answer 6

1913, he invented the hot cathode X-ray tube, the unit we use today (tungsten filament)

Question 7

What is Ionization?

Answer 7

Process by which electrons are removed from electrically stable atoms

Question 8

What is matter?

Answer 8

Anything that occupies space and has a form or shape

Question 9

What is a crest?

Answer 9

Height of a wave

Question 10

What is a trough?

Answer 10

Depth of wave

Question 11

What is wavelength?

Answer 11

Distance between two crests, measured by energy

Question 12

What is frequency?

Answer 12

Number of oscillations per unit of time

Question 13

What is oscillations?

Answer 13

Frequency of wavelength

Question 14

Difference between radioluscent and radiopaque?

Answer 14

Radioluscent - transparent to radiation, black areas on radiograph

Radiopaque - not transparent to radiation, white or gray areas on radiograph

Question 15

Where is the maxillary sinus seen when exposed on X-rays?

Answer 15

Posterior maxillary near molars

Question 16

When it comes to horizontal bitewing radiographs, what do we use them to diagnose?

Answer 16

Interproximal Decay

Question 17

When it comes to vertical bitewings, what are they used to diagnose?

Answer 17

Periodontal disease

Question 18

What do we use periapical radiographs for?

Answer 18

Crowns and roots, full mouth survey

Question 19

What is the purpose of a panoramic film?

Answer 19

To get an FMS

Question 20

What is the purpose of a cephalometric radiographs?

Answer 20

X-ray used by orthos, to take measurements of head/neck/teeth/jaw

Question 21

What is the purpose of a lead apron and thyroid collar?

Answer 21

X-rays can not penetrate lead, protects patients from radiation

Protects thyroids/neck/gonads

Question 22

When discussing the lead apron, what is the minimum thickness?

Answer 22

0.25-0.35mm thick

Question 23

Only time a thyroid collar can’t be used?

Answer 23

Panoramic and cephalometric

Question 24

What is Alara?

Answer 24

Radiation as low as reasonably achievable

Question 25

Another name for paralleling technique?

Answer 25

Right angle/long cone

Question 26

What year was paralleling technique implemented?

Answer 26

1920

Question 27

What image receptor holders are used for the paralleling technique?

Answer 27

XCPs

1. Localization Ring
2. Rod
3. Biteblock

Question 28

What color codes do we use for paralleling technique?

Answer 28

Yellow XCP - posterior PAs
Blue XCP - anterior PAs
Red XCP - BWX
Green XCP - endodontist during RCT

Question 29

What year was the bat technique utilized? Bisecting angle technique/short cone

Answer 29

1907

Question 30

What image holder receptors are used for the bisecting technique?

Answer 30

Disposable and non disposable

Disposables are stabes(A/P PAs) and bitewing tabs(BWX)

Nondisposable - ezee grip/snap a ray (all)

Question 31

Curve of spee?

Answer 31

Curvature formed by the maxillary and mandibular arches in occlusion (natural curve of your teeth)

Question 32

Curve of Wilson?

Answer 32

Cross-arch curvature of the occlusal plane/linguals

Question 33

The right angle technique began in what year?

Answer 33

1920

Question 34

What is the criteria for periapical films? The upper and lower clearances for maxillary and mandibular films?

Answer 34

1/8” at the crown and 2-3mm at the roots

Question 35

What would appear on radiolucent and radiopaque image receptors?

Answer 35

Radiolucent - pulp and cavities

Radiopaque- amalgam and crowns

Question 36

What does an X-ray mean?

Answer 36

Unknown ray

Question 37

Radiography

Answer 37

The making of radiographs by exposing an image receptor to ionizing radiation

Question 38

Radiology

Answer 38

The study of radiation and the technique and technology used to produce radio graphic images

Question 39

Radiograph

Answer 39

Term given to a film-based or digital image produced by exposure to X-rays for the purpose of assessing a condition or treatment intervention

Question 40

Roentgan ray

Answer 40

Term given by scientists following its discovery by Wilhelm Conrad roentgen (later know as X-ray)

Question 41

How many X-rays make up a standard fmx? How many posterior PAs, how many anterior, and how many bwx?

Answer 41

18-20 Fmx
6 Anterior
8 Posterior
4 bitewings