ARTIFACTS Worksheet

CAN ARISE FROM INSUFFICIENT PROJECTION OR VIEW SAMPLING
IMPROPER SAMPLING OF DATA, METAL OR BEAM HARDENING
THIS RADIATION IS A FUNDAMENTAL PHENOMENON ASSOCIATED WITH THE INTERACTION BETWEEN X-RAY PHOTONS AND MATTER.
CAUSED BY INCOMPLETE/INSUFFICIENT PROJECTION SAMPLES (2 WDS)
INCOMPLETE PROJECTIONS, OFF-FOCUS RADIATION
MULTIPLE TISSUES WITH THE SAME VOXEL RESULTS IN INACCURATE CALCULATIONS OF THE VOXELS'S CT NUMBERS (3 WDS)
INCREASE IN THE MEAN ENERGY OF THE X-RAY BEAM AS IT PASSES THROUGH THE PATIENT. (2 WDS)
THESE OBJECTS ARE HIGHLY ATTENUATED TO THE RADIATION , WHICH RESULTS IN ERROR IN PROJECTION PROFILES
PATIENT'S CAN DO THIS VOLUNTARY OR NON VOLUNTARY, WHICH APPEARS AS STREAKS
BAD DETECTOR CHANNELS IN 3RD GENERATION CT SCANNERS.
A DISTORTION OR ERROR IN AN IMAGE THAT IS UNRELATED TO THE SUBJECT BEING STUDIED.
AN X-RAY FLUX OR THE NUMBER OF DETECTED X-RAY PHOTONS
IMAGE NOISE IS MEASURED TYPICALLY ON UNIFORM_____.