Physical evaluation of a needle photostimulable phosphor based CR mammography system

Abstract

Imaging performance for the needle CR phosphor technology, characterized using MTF and DQE and threshold gold thickness demonstrated a clear improvement compared to both single and dual sided reading powder phosphor based CR systems.

Characterization of a clinical unit for digital radiography based on irradiation side sampling technology

“…In fact, an average improvement of about 30% can be observed for the CsI FPD, in agreement to some of the data from the literature for systems dedicated to breast imaging. 26,27 This confirms that the reduction of light spread by the needle structure of the scintillator is effectively able to improve the spatial resolution of the system. All digital radiography systems are subject to large area glare resulting from internal x-ray scatter.…”

“…The slightly reduced performance observed for the GOS detector agrees well with data from the literature 6 and also with recent data from mammography systems. 26 As already observed in previous studies, 33 it is hard to establish a direct relationship between the DQE and the CD response. Though, it seems that the NPS can be a more important feature, for a better comprehension of the CD data.…”

Effect of image quality on calcification detection in digital mammography

“…The simulated CR image quality levels were representative of the so called "powder phosphor" CR plates, as opposed to the needle photostimulable phosphor based CR systems which have been shown to have better physical performance. 41 Microcalcification detection was also found to be significantly reduced when halving and quartering the dose level. In two previous studies 7,8 a significant difference in calcification detection was evident between full and quarter dose images but not between full and half dose images.…”

Structural and Kinetic Analysis of BaCl2 Nanocrystals in Fluorochlorozirconate Glass‐Ceramics

“…Detectors based on the direct conversion of ionizing radiation, namely scintillators, are commonly used in X‐ray security systems, high‐energy particle physics, and computed tomography systems for medical applications . Detectors based on storage and stimulated luminescence, which are photostimulable phosphors, are primarily used for medical X‐ray imaging . FCZ glass‐ceramics are an attractive replacement for current X‐ray photostimulable phosphors (BaBrF:Eu), because of their high spatial resolution and low optical scattering .…”