Software Imaging Applications Flashcards
Original scan data (projection data) forms
the _______ data set
volumetric data set
Multiple basis image projections form the ______ data
projection data.
A ______ data set is then constructed by an imaging software program which then
displays various image reconstructions. The latter is dependent on the power of the
program as specified by the software manufacturer(s).
volumetric data set
What are the 2 formats than scanner software can either store the volumetric data in?
Proprietary (Unique to vendor)
Universal (DICOM)
• standard information transfer method (file format) for transferring images and associated information between devices manufactured by various vendors. -Digital Imaging and Communications in Medicine
DICOM
Beam hardening and streaking occurs due to _____ around metal areas
Volumetric averaging
• is a reconstruction artifact in CT due to the total
absorption of low energy photons by metal objects
• however, high energy photons in the
heterogenous x-ray beam will create a signal in
tissues adjacent the metal structure in the
backprojection algorithm and these areas will be
“burned out” thus creating dark areas
Beam hardening
Effect of ______ simulating peri-implantitis
and alveolar bone defects in the cross-sectional and
parasagittal reconstructions.
beam hardening
_______ creates the outline of a “ghost” implant (as
well as other radiopaque streak outlines) in the cross-
sectional reconstruction.
- makes it more
difficult to discern the validity of the cortical bone outlines.
streak artifact
Does CBCT replace pano images via reconstruction?
Nope
Is volume rendering helpful to diagnose/evaluate disease?
No
____ is helpful to see impacted teeth; ortho; implant placement; airway evaluations
Volume rendering
