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This paper outlines how objective measurements of both image quality, in terms of signal-to-noise ratio, and effective dose may be used as tools to find the optimum kVp range for a digital chest radiography system.
Measurements were made with Thoravision, an amorphous selenium-based digital chest X-ray system. The entrance surface dose and the effective dose to an anthropomorphic chest phantom were determined demonstrating how effective dose is related to beam quality.
The image quality was measured using detective quantum efficiency, threshold contrast and a radiologist preference trial involving patients. The results show that, despite the fact that the entrance surface dose decreases as the kVp increases, the effective dose, a better measure of the risk, reaches a minimum value between 90 and kVp; however, the image quality decreases as the kVp increases.
In this study the optimum kVp for chest radiography, using a selenium-based radiography system, is in the range kVp. This is contrary to the to kVp range that is commonly used. Also, this study shows how objective measurements can be used to optimise radiographic technique without prolonged patient trials.
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Abstract This paper outlines how objective measurements of both image quality, in terms of signal-to-noise ratio, and effective dose may be used as tools to find the optimum kVp range for a digital chest radiography system. Similar articles A framework for optimising the radiographic technique in digital X-ray imaging. Samei E, et al. Radiat Prot Dosimetry. PMID: Ultra-high pitch chest computed tomography at 70 kVp tube voltage in an anthropomorphic pediatric phantom and non-sedated pediatric patients: Initial experience with 3 rd generation dual-source CT.
Hagelstein C, et al. Z Med Phys. Epub Dec Optimisation of radiological protocols for chest imaging using computed radiography and flat-panel X-ray detectors. Compagnone G, et al. Radiol Med. Epub Oct Optimization of chest radiographic imaging parameters: a comparison of image quality and entrance skin dose for digital chest radiography systems. Sun Z, et al. Clin Imaging. Epub Jun 8. Digital chest radiography: an update on modern technology, dose containment and control of image quality.
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Tack D, et al. Use of a digitally reconstructed radiograph-based computer simulation for the optimisation of chest radiographic techniques for computed radiography imaging systems. Epub Jan A method to produce and validate a digitally reconstructed radiograph-based computer simulation for optimisation of chest radiographs acquired with a computed radiography imaging system.
Show more "Cited by" articles See all "Cited by" articles. Publication types Research Support, Non-U. Gov't Actions. Full-text links [x] Springer. Copy Download.
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