Incomplete erasure of a CR image receptor may produce an artifact called:

Incomplete erasure of a CR image receptor may produce an artifact called:

• A. Quantum mottle
• B. Loss of contrast
• C. Radiation fog
• D. Ghost image

Answer: (D)

Incomplete erasure of a CR image receptor leaves residual latent image on the plate. In computed radiography, the imaging plate stores energy as a latent image in a photostimulable phosphor and must be fully erased with intense light before reuse. If this erasure is incomplete, a residual image from a previous exposure remains and is read along with the new exposure, producing a faint, duplicated image—a ghost image—superimposed on the current radiograph. This artifact occurs specifically because prior data wasn’t completely removed. Other artifacts arise from different causes: quantum mottle is graininess from too few x-ray photons, loss of contrast stems from factors like scatter or processing issues, and radiation fog comes from general fogging due to scattered radiation or prolonged exposure. Ghost image directly reflects incomplete plate erasure.

Incomplete erasure of a CR image receptor leaves residual latent image on the plate. In computed radiography, the imaging plate stores energy as a latent image in a photostimulable phosphor and must be fully erased with intense light before reuse. If this erasure is incomplete, a residual image from a previous exposure remains and is read along with the new exposure, producing a faint, duplicated image—a ghost image—superimposed on the current radiograph. This artifact occurs specifically because prior data wasn’t completely removed.

Other artifacts arise from different causes: quantum mottle is graininess from too few x-ray photons, loss of contrast stems from factors like scatter or processing issues, and radiation fog comes from general fogging due to scattered radiation or prolonged exposure. Ghost image directly reflects incomplete plate erasure.