Alternative Imaging Modalities Flashcards
What are 4 imaging modalities that are hardly, if ever, used in general dental practices, however hospital dental specialists may request them?
MRI
Ultrasound
Nuclear medicine (radio-isotope scanning)
PET
What is a blow-out fracture?
Fracture of the orbital floor, causing orbital contents to herniate into the sinus
What is the main benefit and also the mian disadvantage to a smaller CBCT voxel being used?
Benefit: results in a higher resolution image
Disadvantage: requires longer scan time and therefore a higher dose required
What is the axial plane?
Also known as the transverse plane, it is a horizontal plane that divides the body part into superior and inferior sections
What is the coronal plane?
Also known as frontal plane, it divides the body part into front and back sections
What is the sagittal plane?
Also known as the longitudinal plane, it divides the body into right and left sections
What is MRI?
Magnetic resonance screening is a type of scan that uses strong magnetic fields and radio waves to produce detailed images of the inside of the body
What type of tissue is MRI useful for assessing?
Soft tissue
What are the main contraindications of MRI use?
pacemakers
artificial heart valves
-intra-cerebral aneurysm clips
1st trimester pregnancy
claustrophobia
In what patient cases would it be suitable to refer for MRI?
TMJ disorders (particularly disc problems)
salivary gland pathology
assessing early bone changes if there is suspected medication-related osteonecrosis of the jaw
how does an ultrasound work?
Transducer placed o skin
Sound waves bounce off tissues and back to probe
Ultrasound can travel beyond hard tissues. True or false?
False
what is radio-isotope scanning?
An imaging technique where small dose of isotopes are injected into the body and emit radiation in order to detect changes in target tissue
what is technetium?
The lightest chemical element whose isotopes are all radioactive
what chemical element does radioisotope scanning use?
Technetium
