Characterization of Medipix3 With Synchrotron Radiation

Gimenez, E.N.; Ballabriga, R.; Campbell, M.; Horswell, I.; Llopart, X.; Marchal, J.; Sawhney, Kawal; Tartoni, N.; Tureček, D.

doi:10.1109/tns.2010.2089062

Cited by 69 publications

(54 citation statements)

References 16 publications

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“…The reconstructed charge will then be exclusively allocated to a pixel with the largest charge once it exceeds a set energy threshold. 13,29 The recorded spectra had substantially decreased low energy tailing and distinct K-escape peaks. 52 The spectrum measured with a pixel pitch as small as 55-μm with anti-charge sharing looks comparable to that measured by a 165-μm pitch pixel without anticharge sharing, which has a nine times larger pixel area.…”

Section: B2bmentioning

confidence: 99%

Vision 20/20: Single photon counting x‐ray detectors in medical imaging

2013

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Photon counting detectors (PCDs) with energy discrimination capabilities have been developed for medical x-ray computed tomography (CT) and x-ray (XR) imaging. Using detection mechanisms that are completely different from the current energy integrating detectors and measuring the material information of the object to be imaged, these PCDs have the potential not only to improve the current CT and XR images, such as dose reduction, but also to open revolutionary novel applications such as molecular CT and XR imaging. The performance of PCDs is not flawless, however, and it seems extremely challenging to develop PCDs with close to ideal characteristics. In this paper, the authors offer our vision for the future of PCD-CT and PCD-XR with the review of the current status and the prediction of (1) detector technologies, (2) imaging technologies, (3) system technologies, and (4) potential clinical benefits with PCDs.

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Section: B2bmentioning

confidence: 99%

Vision 20/20: Single photon counting x‐ray detectors in medical imaging

2013

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“…Both the detector and the CRL lenses were aligned to the synchrotron beam. The size of the micro-focused beam was measured by taking transmission scans of 200 µm diameter Au cross-wires as discussed in [13]. The micro-focused beam was used to perform a 2 dimensional scan across the surface of the detector and study the charge collection and readout process of both the CSM and SPM modes of the Medipix3RX detector.…”

Section: B Micro-focused Monochromatic Beammentioning

confidence: 99%

“…Previous synchrotron tests [13] to characterize the first version of the Medipix3 ASIC [14], [15], referred to as Medipix3v0, showed an unexpected pixel-to-pixel threshold level dispersion when the detector was operated in CSM mode. Furthermore, although the CSM mode eliminated the double counts and count losses produced as a consequence of charge sharing between adjacent pixels, it introduced a pixel misallocation between where the photon impinged on the sensor and the readout pixel that recorded the event.…”

mentioning

confidence: 99%

Medipix3RX: Characterizing the Medipix3 Redesign With Synchrotron Radiation

Gimenez

Ballabriga

Blaj

et al. 2015

IEEE Trans. Nucl. Sci.

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The Medipix3RX is the latest version of the Medipix3 photon counting ASICs, which implements two new operational modes, with respect to the Medipix2 ASIC, aimed at eliminating charge shared events (referred to as Charge Summing Mode (CSM)) and at providing spectroscopic information (referred to as Colour Mode (CM)). The Medipix3RX is a redesign of the Medipix3v0 ASIC and corrects for the underperformance of CSM features observed in the previous version. This paper presents the results from synchrotron X-rays tests to evaluate the Medipix3RX ASIC performance. The newly implemented CSM algorithm eliminates the charge sharing effect at the same time as allocating the event to the readout pixel corresponding to the sensor pixel where the X-ray photon impinged. The new pixel trimming circuit led to a reduced dispersion between pixels. Further results of the linearity for all the gain modes, energy resolution and pixel uniformity are also presented.Index Terms-Medipix3 RX, micro focused beam, photon counting detectors, synchrotron applications, x-ray detectors, x-ray imaging.

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“…In the 1990s, the Medipix chip was developed [10]. Although only 14 mm 2 in size, this chip can quantify Xray photons more accurately than previous electronic detector systems, measuring individual photon energies with greater sensitivity, at high temporal resolution [11] and at very high spatial resolution (55 μm) compared with current CT systems [12].…”

Section: Introductionmentioning

confidence: 99%

Spectral Hounsfield units: a new radiological concept

et al. 2011

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• Spectral computed tomography uses K-edge and slope effects to identify element signatures. • New visualisation tools will be required to efficiently display spectral CT information. • This paper demonstrates HU variation with keV using the Medipix3 chip. • HU ( keV ) is a suggested format when stating spectral HU measurements.

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Characterization of Medipix3 With Synchrotron Radiation

Cited by 69 publications

References 16 publications

Vision 20/20: Single photon counting x‐ray detectors in medical imaging

Vision 20/20: Single photon counting x‐ray detectors in medical imaging

Medipix3RX: Characterizing the Medipix3 Redesign With Synchrotron Radiation

Spectral Hounsfield units: a new radiological concept

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