Technical Errors & Artifacts
This occurs when two PSP plates are fed into the scanner slot too quickly or simultaneously.
What is a scanning error?
2 types/brands of handheld x-ray device used in dentistry
what is MaxRay and NoMad
This principle, based on the assumption that no radiation dose is completely risk-free, drives the philosophy of minimizing exposure in dental radiography
What is the ALARA
Name two main types of digital image receptors used in dentistry
what is Direct sensors (e.g., CCD or CMOS) and Indirect systems (e.g., PSP plates – photostimulable phosphor plates)
A way to avoid underexposure error
what is waiting for full exposure cycle (see+hear it)
where the operator should stand when using a handheld x-ray device
what is behind the backscatter shield
This is the recommended way to hold the NOMAD Pro 2 during exposure
What is with two hands for maximum stability?
The smallest unit of a digital image.
What is a pixel?
This type of angulation error occurs when the central ray is perpendicular to the plate instead of the tooth, causing foreshortening.
What is incorrect vertical angulation?
To maintain image quality, the PID and backscatter shield must be positioned this way relative to the patient
What is parallel to the patient and aiming ring?
Device that measures a worker’s radiation exposure
What is a dosimeter?
The bit depth of a system that can show 256 shades of gray.
What is 8-bit?
A faint or faded PSP image after scanning is often caused by this handling mistake.
What is exposing a PSP plate to ambient light before scanning?
3 exposure techniques used to optimize patient safety and image quality
what is use shortest possible exposure time, maintain proper distance and alignment, ensure collimation to the area of interest?
The ideal operating kVp range for dental x-ray units
Digital receptor type that stores latent images as trapped electrons.
What is PSP?
3 possible causes of a dark (overexposed) radiograph
what is excessive exposure time, high kVp or mA setting, improper processing time
4 maintenance checks that are essential for handheld x-ray devices
what is battery condition, backscatter shield integrity, PID alignment, calibration accuracy?
The unit used to measure effective dose in radiology
What is mSv?
4 common artifacts seen in digital imaging
what is Scratches or dust on PSP plates, Double images from un-erased plates, Bite marks or bending on sensors, Image noise due to low exposure?