Test your basic knowledge |

Radiology 2

Subjects : health-sciences, radiology

Instructions:

Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can study here.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.

1. How is vertical angulation established with the bisecting technique
Patient positioned too far foward in the focal trough
As low as reasonably achievable
Beam is perpendicular to the imaginary line that bisects the angle formed by the long axis and the film
Air space and soft tissues

2. What causes a HERRINGBONE effect
max molars have 3 roots - mand have 2 roots
turn on machine -adjust settings -press exposure button -filament heats up/thermoionic emmision -electron cloud is formed -electrons flow from cathode to anode -electrons strike target -energy is converted into x-rays and heat
Highest of the 2 ridges - about the level of the cervical 3rd - behind the 2nd and 3rd molars
Film placed backwards

3. What exposure would be useful in identifying salivary stones in the submandibular gland
max molars have 3 roots - mand have 2 roots
Located on the tooth surface that contacts the adjacent tooth
Mand occlusal
Dentsply rinn - XCP - XCP-DS - flow dental RAPD

4. How does exposure time for edentulous patients compare to dentulous patients
1/5 exposure time for edentulous
Density
Roentgen
68 degrees F

5. List the properties of x-rays
invisible -travel in straight lines -no mass/weight -travel and speed of light -no charge -interact w/ matter causing ionization -can penetrate opaque tissues and structures -can effect photographic film emulsion -can effect biologic tissue
Extra oral
Images conditions of the teeth and supporting structures when a larger area than a PA is needed; provides more info. than a PA about the alveolar crest and apical areas
No exposure to x-rays - electrical failure - malfunction of x-ray machine - or processing errors

6. What 3 types of cells are most radioresistant
Every 6 mths
Perpendicular to the tooth and film
Nerve - brain - muscle
#1

7. What anatomical structures appear radiolucent on a dental radiograph
Only when necessary to help the dentist diagnose and treat oral diseases; elective xrays should be postponed until after delivery
Air space and soft tissues
Movement caused by the patient - slippage of the image receptor - or vibration of the tube head
No. 2

8. 3 film holding devices used for bisecting
Provides more info. about the location of tori - impacted and malpositioned teeth and the calcification of soft tissues
Clinical exam
Premature contact w/ developing chemicals - Drops of developer or fixer that splash onto the work area and came in contact with the film.
Dentsply rinn stabe - BAI - dental SUPA

9. What are three types of image receptors used in digital radiography
Sterilize film holder devices or discard disposable image receptor holding devices
Blank or clear (takes all of the crystals off)
CCD (direct) - CMOS (direct) - PSP (indirect)
Oral piercings - earings - glasses - necklaces - facial piercings - hair pins - hearing aids - dentures - and retainers

10. A properly exposed film appears completely black. when was is exposed to white light
decrease mA & time
Before fixing
White blood cells - red blood cells - immature reproductive cells - epithelial cells - connective tissue cells - bone cells - nerve cells - brain cells - muscle cells
Mand. foramen

11. What is the purpose of taking radiographs of an edentulous patient
Check the processing chemical - particularly the developer
Chronic low-level exposures/long term dose; causing cancer - cataracts - low birth weight - genetic mutations - and embryological defects
detect pathological lesions -establish position of mental foramen -establish position of mand canal -determine quality & quantity of alveolar bone present
6 ft

12. How does the reproductive capacity of a cell correlate with radiosensitivity
underexposure-underdevelopment -depleted developer solution -excessive fixation (takes all crystals off)
Rapidly producing cells are more sensitive to radiation
Left side
Genial tubercles - lingual foramen

13. How far from the work surface must the safelight be mounted
4 feet
KVp
Photostimuable Phosphor Plate aka storage phosphor system -indirect digital imaging -captures analog data then processed in a laser scanning device -light is then converted into electrical signal that the computer uses to create the digital image
Size of crystals - thickness of emulsion - radiosensitive dyes

14. What is the purpose of filtration
Thyroid collar - lead and lead-equivalent sprons are availaable with or without an attached thyroid collar
Insufficient or improper washing
Absorb long wavelengths / soft radiation
Depends on the needs of the patient - established after intraoral exam

15. How far should the operator stand from the source of radiation
Max. sinus - zygoma
#0
No. 3
6 ft

16. using a 16 inch cone focal-film distance - the diameter of the beam measured at the patient's face should be no larger than
Original - undeflected - useful beam
take 14 radiographs -omit the BW -paralleling should be technique of choice -panoramic might be better than FMS
No. 1
2.75 inch

17. What exposure is taken to determine jaw relationships in ortho treatment planning
Lateral cephalometric
Faster film = lower definition and detail
Aluminum
Thyroid collar - lead and lead-equivalent sprons are availaable with or without an attached thyroid collar

18. When mounting dental radiographs - What is the best way to differentiate max and mand films?
X-rays hit phosphor screen creating florescent light that exposes the film
Panoramic cape
Insufficient vertical angulation
max teeth are longer - max molars have 3 roots - mand molars have 2 roots - most roots curve toward the distal - occlusal plane is straight or curved slight towards distal

19. How long does the first rinse last
Blank or clear (takes all of the crystals off)
Sv & Rem
20 seconds
Parallel

20. when processing - two films overlap in the developer - but not in the fixer. How would the films appear
X-ray and heat
2.75 inches
Clear/blue in the area of overlap b/c fixer will not remove all crystals
X-rays that have been deflected from an object and have changed paths

21. Your dentist asks you to take a FMS on a 65 yr old edentulous patient. How many exposures will you take? which exposures are not necessary? What intraoral technique will you use? What might be better than a FMS?
take 14 radiographs -omit the BW -paralleling should be technique of choice -panoramic might be better than FMS
Max arch ala-tragus parallel to floor - mand arch
50 mSv (5rem)
Clinical exam

22. What causes foreshortening
Lighter image - patient exposed to larger beam which will increase exposure
Excessive vertical angulation
68 degrees F
Top of film delineated by a straight line then dark

23. When using D speed film - you use 50 impulses of radiation. How many impulses would you use with E speed film?
Erythema
1/6th of a second
Reduces the exposed silver halide crystals to black metallic silver
25

24. What would cause a properly exposed film to appear dark?
6 ft
Dentin - enamel - bone
Overdevelopment -temp. too high -time too long -developer concentration too high -inadequate fixation -accidental exposure to light -improper safelighting
#4

25. When interpreting radiographs - you notice a radiopaque extension or spur off the proximal surface of #30. What do you think this is?
bisecting - packet is as close to tooth as possible - but not parallel -parallel - packet is parallel to tooth - further away
Old or contaminated processing solutions -exposure to chemical fumes -faulty safelight -scatter radiation
Blank or clear (takes all of the crystals off)
The mental ridge

26. when mounting a film the dot is convex - On What side of the mouth would you find #32?
Coulombs/kilogram(C/kg) & Roentgen (R)
Left side
Premature contact w/ developing chemicals - Drops of developer or fixer that splash onto the work area and came in contact with the film.
Take FMS on all new patients; recall adults with no sig. med. history only require BW and PA - if indicated

27. What radiograph is used to sHow contrast in soft tissues
Periodically examining cassettes and intensifying screens; extra oral cassettes should be checked for warping and light leaks
Quantum of energy
On the back side of the tori
MRI

28. What Size film is 1 1/4 x 1 5/8
Periapical
No. 2
Increased focal spot size - decrease source-object distance - & increased object-film distance
1/5 exposure time for edentulous

29. What causes overlapping
Incorrect horrizontal angulation
Cut exposure time by 1/3
Reduces the exposed silver halide crystals to black metallic silver
All of the ant. teeth will appear blurred and narrowed in width

30. What is the optimum processing temp.
Erythema - vomitting - nausea - hemorrage - diarrhea - hair loss
Dark film is from over exposure and improper packet placement for strange looking teeth and not being able to determine What film is
68 degrees F
All of the ant. teeth will appear blurred and narrowed in width

31. What part of the x-ray machine helps remove heat
Thyroid collar - lead and lead-equivalent sprons are availaable with or without an attached thyroid collar
Film placed backwards
Copper stem - radiator and air space
Do not suggest gagging - emphasize - use power of suggestions - apply distractiong techniques - give patient breathing instructions - reduce tactile stimuli - being exposures in the ant. region - place image receptor firmly and expertly - confuse the

32. What are the 2 units used to measure exposure to radiation
Coulombs/kilogram(C/kg) & Roentgen (R)
Not centered on sensor
1/3-1/2
Short-term dose

33. What type of film are calcium tungstate screens paired with
Removes the unexposed silver halide crystals
Blue light sensitive films
Duplicate - which will go to the insurance comp.; office keeps best copy
Only when necessary to help the dentist diagnose and treat oral diseases; elective xrays should be postponed until after delivery

34. Max lat. canine anatomy
Nasal fossa - max sinus
max molars have 3 roots - mand have 2 roots
Rectangular collimation and fast film speed
Sv & Rem

35. What is the best method of reducing radiation to the patient
After 2-3 min of fixing if needed
Clinical exam
Time b/w exposure and 1st clinically observable symptoms
Rectangular collimation and fast film speed

36. What is scatter radiation
Chin down
X-rays that have been deflected from an object and have changed paths
50 mSv (5rem)
Didn't push button completely

37. What is the most likely cause of a film with very poor definition
Patient movement
Mandibular occlusal
No. 1
Method should be compensated for bisecting or paralleling

38. What parts of the x-ray machine are included in the anode circuit
Take FMS on all new patients; recall adults with no sig. med. history only require BW and PA - if indicated
Copper stem - tungsten target - radiator
Move farther from the radiation
Faster film = lower definition and detail

39. when viewing a PANO - you notice that the right TMJ is magnified - bu the left TMJ is normal. What caused this error
Genial tubercles - lingual foramen
Patient positioned too far to the left
Part that was fixed but not developed would be clear
Beam is perpendicular to the imaginary line that bisects the angle formed by the long axis and the film

40. You notice on a PANO that the ant. teeth appear narrow and out of focus. What caused this
Cracking of the emulsion caused by excessive temp diff. b/w any darkroom solutions
Patient positioned too far foward in the focal trough
#0
Dark film is from over exposure and improper packet placement for strange looking teeth and not being able to determine What film is

41. What speed films are most commonly used?
Remove silver
D - E - F
bisecting was used b/c of the distortion of the elongated root - the roots appeared long b/c the vertical angulation was inadequate
Roentgen

42. On a mandibular molar PA - Where is the mylohoid ridge located
Highest of the 2 ridges - about the level of the cervical 3rd - behind the 2nd and 3rd molars
The less the patient is exposed - the less the operator is exposed
Mental foramen - mental ridge - mand canal
Removes the unexposed silver halide crystals

43. after processing exposed dental film - you notice dark spots on the film. What caused this
Excessive vertical angulation
Premature contact with developer
5 mSv or .5 REM
Rapidly producing cells are more sensitive to radiation

44. which anatomical structures appear radiolucent
Lead
Mand. foramen
Soft tissue - air space
Overexposure -overdevelopment -developer is too strong -not enough fixation -exposure to white light -improper safelighting

45. who discovered x-rays
BW
Reg. replenishment and changing out expired solutiong with fresh chemicals at reg. intervals; monitor strength of chemicals on a daily basis
Roentgen
GBX - 2

46. What does alara stand for
Parallel
Premature contact with developer
No. 3
As low as reasonably achievable

47. What part of the x-ray machine is responsible for providing the electrons
Scatter/secondary radition
Every 4 weeks
Filament
Image the entire dentition - surrounding alveolar bone - sinuses - and the TMJ - examine large area of face and jaws - locate impacted teeth - retain root tips - evaluate trauma - lesions - and diseases - and assess growth and development

48. Size film used for anterior PA's for patients with narrow arches
#1
#0
Didn't push button completely
X-ray and heat

49. when viewing a PANO - you notice that a lot of spine sHows on both side of the film - What caused this
Direct - directly obtaining a digital image by exposing intraoral sensor to x-rays to provide an image that can be viewed on a computer - indirect - photostimuable phosphor plate sensor technology - obtaining a digital image in which an exposed phosp
Move farther from the radiation
Positioning the arches too far foward
Higher kVp = low exposure

50. What is a large dose of radiation given over a short period of time
Short-term dose
Cosmic - naturally occuring radiation from earth - radiation for radioactive materials
.25 mm
Do not suggest gagging - emphasize - use power of suggestions - apply distractiong techniques - give patient breathing instructions - reduce tactile stimuli - being exposures in the ant. region - place image receptor firmly and expertly - confuse the

Sorry!:) No result found.

Can you answer 50 questions in 15 minutes?

Major Subjects
Tests & Exams AP CLEP DSST GRE SAT GMAT	Certifications CISSP go to https://www.isc2.org/ PMP ITIL RHCE MCTS More...	IT Skills Android Programming Data Modeling Objective C Programming Basic Python Programming Adobe Illustrator More...	Business Skills Advertising Techniques Business Accounting Basics Business Strategy Human Resource Management Marketing Basics More...
Soft Skills Body Language People Skills Public Speaking Persuasion Job Hunting And Resumes More...	Vocabulary GRE Vocab SAT Vocab TOEFL Essential Vocab Basic English Words For All Global Words You Should Know Business English More...	Languages AP German Vocab AP Latin Vocab SAT Subject Test: French Italian Survival Norwegian Survival More...	Engineering Audio Engineering Computer Science Engineering Aerospace Engineering Chemical Engineering Structural Engineering More...
Health Sciences Basic Nursing Skills Health Science Language Fundamentals Veterinary Technology Medical Language Cardiology Clinical Surgery More...	English Grammar Fundamentals Literary And Rhetorical Vocab Elements Of Style Vocab Introduction To English Major Complete Advanced Sentences Literature Homonyms More...	Math Algebra Formulas Basic Arithmetic: Measurements Metric Conversions Geometric Properties Important Math Facts Number Sense Vocab Business Math More...	Other Major Subjects Science Economics History Law Performing-arts Cooking Logic & Reasoning Trivia

Test your basic knowledge |

Radiology 2

Sorry!:) No result found.

Can you answer 50 questions in 15 minutes?

Let me suggest you:

Browse all subjects

Browse all tests

Most popular tests

Major Subjects

Tests & Exams

Certifications

IT Skills

Business Skills

Soft Skills

Vocabulary

Languages

Engineering

Health Sciences

English

Math

Other Major Subjects

Browse all subjects

Browse all tests

Most popular tests