What are image artifacts in radiography?
An artifact on an image is a feature that does not correlate with the physical properties of the subject being imaged and may confound or obscure interpretation of that image. In this article, examples of artifacts from flat-panel detector–based digital radiographic systems are presented.
What are CR plates?
Sometimes called “film replacement technology”, Computed Radiography (CR) uses a flexible phosphor Imaging Plate (IP) to capture digital images instead of conventional photographic film.
What are CR imaging plates made of?
Computed Radiography System These are typically made from BaFBR:Eu2+. The phosphor plates are exposed to x-rays and an electronic charge is stored at the location of the absorbed x-ray.
What does artifact on xray mean?
X-ray artifacts can present in a variety of ways including abnormal shadows noted on a radiograph or degraded image quality, and have been produced by artificial means from hardware failure, operator error and software (post-processing) artifacts.
What are imaging artifacts?
An image artifact is any feature which appears in an image which is not present in the original imaged object. An image artifact is sometime the result of improper operation of the imager, and other times a consequence of natural processes or properties of the human body.
What are artifacts in CT scan?
CT artifacts originate from a range of sources. Physics-based artifacts result from the physical processes involved in the acquisition of CT data. Patient-based artifacts are caused by such factors as patient movement or the presence of metallic materials in or on the patient.
What is CR and CT?
Both DR and CR modalities produce a 2D image of the object. In contrast, CT systems produce a 3D image that is created by taking multiple image ‘slices’ (usually many thousands) at different angles around a single axis of object rotation.
How would a stain on a CR imaging plate appear on a radiograph?
*****How would a stain on a CR imaging plate appear on a radiograph? The stain would absorb light, thereby making the radiograph lighter in that area.
What are considered artifacts?
Artifacts include art, tools, and clothing made by people of any time and place. The term can also be used to refer to the remains of an object, such as a shard of broken pottery or glassware. Artifacts are immensely useful to scholars who want to learn about a culture.
What causes artifacts on a CR imaging plate?
Similar artifacts are caused by CR imaging plates that are not erased frequently and/or exposed to x-ray scatter from another procedure, resulting in a variable background signal that is superimposed on the image. Double exposures are also common, since the imaging plate is a reusable detector.
How are imaging plates used in computed radiography?
CR Erasure Efficiency. In Computed Radiography (CR), a photostimulable storage phosphor imaging plate is used to acquire an x-ray image. These imaging plates are reusable cassettes and eliminate costs of non-reusable material such as film screen.
How is a CR reader used in radiography?
In Computed Radiography (CR), a photostimulable storage phosphor imaging plate is used to acquire an x-ray image. These imaging plates are reusable cassettes and eliminate costs of non-reusable material such as film screen. A CR reader is then needed to extract the latent image from the phosphor.
Are there any artefacts in computed radiography images?
Although most artefacts that occur in conventional radiography have become familiar, conventional radiogr aphy. We have encountered a variety of artefacts in CR images that were produced from four different models plate reader. These artefacts have be en identified and traced