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Radiology > CBCT Indications and Interpretation > Flashcards

CBCT Indications and Interpretation Flashcards

1
Q

CT skill effective dose in uSv

A

1000 uSv

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2
Q

Dental Pano effective dose in uSv

A

15 uSv

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3
Q

dental effective dose of full mouth in uSv

A

85 uSv

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4
Q

Dental CBCT effective dose in uSv

A

100 uSv

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5
Q

most common implication for a CBCT

what view is best?

A

IMPLANT PLANNING

  • need to see 3D prjections
  • relationship of canal location

cross -sectinoal from the side so you can see the lingual and buccal plate thickness

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6
Q

second reason for CBCT

A 
ENDO
- after conventional radiographs
- complex anaomty and morphology
- suspected perioapical pathosis 
trauma
root resoprtion
- apicoectomy planning
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7
Q

top 9 indications for CBCT

A
  1. implant
  2. endo
  3. ortho
  4. impactions and extractions
  5. pathology evaluation
  6. anatomic structure location
  7. trauma evaluation
  8. TMJ evaluation
  9. airway assessment
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8
Q

elements of a CBCT Radiologic report

A
  1. Patient info
  2. scan info
  3. radilogic findings - general findings
  4. radiologic impression - differential diangosis or definitive diagnosis
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9
Q 
shades of gray in a CBCT 
 black?
grey?
light grey?
light to white
white
A

black – air / like a sinus

dark gray – fate and loose connective tissue

lighter grey - soft tissue

light grey to white - calcified tissue and bone, teeth

white – metal

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10
Q

sequence you should use when looking at anatomy?

acronym?

A
  1. oral cavity
  2. paranasal
  3. skull base
  4. neck

“Only Play Soccer Naked”

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11
Q

look at every slice in how many planes?

A

3 planes

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12
Q

definition of ostium

A

small opening

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13
Q

how can you tell it is an axial slice?

A

aatomy of teeth
- in posterior you have two buccal roots and one palatal root

  • woudlnt see this in mandibular
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14
Q

what view will most of our indentifications be in with CBCT?

A

axial

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15
Q

what is the only strucute we have to identify that could be seen above the orbit?

A

Frontal sinus

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16
Q

ethmoid air cells found where?

A

black - within nasal cavity in axial slice

BETWEEN THE ORBITS

17
Q

OPTICAL CANAL location

A

find optic nerve and trace it – iti is going MEDIALLY

18
Q

superior orbital fissure location?

A

more LATERAL than the optic canal

19
Q

zygomatic process of the maxilla

A

his favorite one to test us on

- starts to communicate with zygomatic bone

20
Q

Pterygopalantine fossa location

note which axial slice as well

A

just posterior to the maxillary sinuses

looks grey

A(so more superior in the slices he will give us)

21
Q

infraorbital canal

note which axial slice as well

A

B*

looks like it is located where the zygomatic process of the maxilla is but in a more inferior slice
- within the bony structure of the mandible

infraorbital foramen will be in basically same place but in a more inferior axial slice

22
Q

lateral wall of maxillary sinuse

note which axial slice as well

A

B*

23
Q

pterygomaxillary fissure

note which axial slice as well

A

B*
opening into the ptergopalantine fossa

so just posterior to the maxillary sinus and may not have us distinguish between the fissure and the fossa

24
Q

coronoid process

note which axial slice as well

A

should start to be going through the level of the condyle

25
Q

pterygoid plates

A

should be posteior to maxillary sinus and lateral to the nasopharyngeal airway

26
Q

mandibular condylar head

A

somewhat more posterior and lateral

- can recognize the bony outline

27
Q

ramus of mandible

A

looks like it is between the zygomatic and the condylar head

is located in the more inferior axial slice he will give us

28
Q

nasolacrimal duct

A

more superior in the axial slices

looks more grey than opaque
- lateral aspect of the nasal septums

29
Q

nasal turbinate

A

looks grey ish and is medial to the septum

30
Q

hard palate in close proximity to? in axial slice?

A

nasopalatine canal and intermaxillary suture

31
Q

OROPHARYNGEAL airway space vs. nasopharyngeal airway space

A

OROPHARYNGEA is in the slices more inferior

- going through more of the maxilla nad mandible rather than coronoud process/ orbit area

32
Q

epiglottis located at what level

A

lower mandibular dentition

  • differentiate this between the uvula
33
Q

hyoid bone vs greater cornu of hyoid bone?

A

Hyoid bone is more medial

both are at the level of the mandibular dentition

Radiology (26 decks)

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