1 Flashcards
Afterglow
Flash of scintillation subtracted before image reconstruction
Detector rows with various sizes
Adaptive array/ non uniform / hybrid rays
Algorithm
Steps in a specific order to solve problem
Array processor / vector processor
CPU design used for reconstruction
Attenuation profile
Attenuation properties that correlate position of rays
Automated inj triggering
2 methods
Test bolus
Bolus triggering
Step and shoot is also called
Axial
Conventional
Serial
Sequence
Back projection
Converting —>attenuation profile—> matrix
Beam pitch
Table movement per rotation % beam width
B blockers
Reduces motion artifact on cardiac CTA images by lowering pts heart rate
Bolus inj
Rapid inj of contrast done by hand or inj system
Bolus phase
What phase is it?
Initial phase that follows iv bolus inj and arterial structures r filled with contrast
Not reaching venous structures
Bolus phase = arterial phase
Bolus triggering
Use contrast bolus to initiate the scan.. Then uses a series of low xrt scans to monitor contrast bolus… Once level is enhanced table moves starting scan
