Detectors for the future of X-ray imaging.
Radiat Prot Dosimetry
; 139(1-3): 327-33, 2010.
Article
de En
| MEDLINE
| ID: mdl-20207749
ABSTRACT
In recent decades, developments in detectors for X-ray imaging have improved dose efficiency. This has been accomplished with for example, structured scintillators such as columnar CsI, or with direct detectors where the X rays are converted to electric charge carriers in a semiconductor. Scattered radiation remains a major noise source, and fairly inefficient anti-scatter grids are still a gold standard. Hence, any future development should include improved scatter rejection. In recent years, photon-counting detectors have generated significant interest by several companies as well as academic research groups. This method eliminates electronic noise, which is an advantage in low-dose applications. Moreover, energy-sensitive photon-counting detectors allow for further improvements by optimising the signal-to-quantum-noise ratio, anatomical background subtraction or quantitative analysis of object constituents. This paper reviews state-of-the-art photon-counting detectors, scatter control and their application in diagnostic X-ray medical imaging. In particular, spectral imaging with photon-counting detectors, pitfalls such as charge sharing and high rates and various proposals for mitigation are discussed.
Texte intégral:
1
Collection:
01-internacional
Base de données:
MEDLINE
Sujet principal:
Transducteurs
/
Radiographie
/
Amélioration d'image radiographique
/
Systèmes d'information de radiologie
/
Prévision
Type d'étude:
Diagnostic_studies
/
Health_technology_assessment
/
Prognostic_studies
Langue:
En
Journal:
Radiat Prot Dosimetry
Année:
2010
Type de document:
Article
Pays d'affiliation:
Suède