A 32-channel charge readout IC for programmable, nonlinear quantization of multichannel detector data

Garverick, S.L.; Skrenes, L.; Baertsch, R.D.

doi:10.1109/4.384166

Cited by 13 publications

(3 citation statements)

References 11 publications

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“…Each detector element ͑pixel͒ in the array is an individually addressable light detector. The electrical signals of all pixels are individually read out and digitized to 16 bit digital values in 300 ms by special-purpose low-noise electronics 33 which are located inside the image receptor assembly. The schematic of the detector is shown in Fig.…”

Section: Methodsmentioning

confidence: 99%

Full breast digital mammography with an amorphous silicon‐based flat panel detector: Physical characteristics of a clinical prototype

et al. 2000

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The physical characteristics of a clinical prototype amorphous silicon-based flat panel imager for full-breast digital mammography have been investigated. The imager employs a thin thallium doped CsI scintillator on an amorphous silicon matrix of detector elements with a pixel pitch of 100 microm. Objective criteria such as modulation transfer function (MTF), noise power spectrum, detective quantum efficiency (DQE), and noise equivalent quanta were employed for this evaluation. The presampling MTF was found to be 0.73, 0.42, and 0.28 at 2, 4, and 5 cycles/mm, respectively. The measured DQE of the current prototype utilizing a 28 kVp, Mo-Mo spectrum beam hardened with 4.5 cm Lucite is approximately 55% at close to zero spatial frequency at an exposure of 32.8 mR, and decreases to approximately 40% at a low exposure of 1.3 mR. Detector element nonuniformity and electronic gain variations were not significant after appropriate calibration and software corrections. The response of the imager was linear and did not exhibit signal saturation under tested exposure conditions.

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Section: Methodsmentioning

confidence: 99%

Full breast digital mammography with an amorphous silicon‐based flat panel detector: Physical characteristics of a clinical prototype

et al. 2000

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“…The photometer test tool provide/by Dome was utilized for generating the SMPTE pattern An image of the SMPTE test pattern is shown in Fig 4 with the 0% to 5% and 95% to 100% contrast boxes labeled. An extensive description of the use of SMPTE test pattern images for evaluating soft copy deuces was given by Nawfel et al 33 The SMPTE pattern image was studied for the following features: ability to discern 0% to 5% contrast box and 95% to 100% contrast box, ability to distinguish line-pair images at the center and corners of the SMPTE pattern, and presence of any bleeding effects.…”

Section: Qualitative Measuresmentioning

confidence: 99%

Clinical and Technical Evaluation of Full Field Digital Mammography

Lewin¹

2000

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“…A more detailed analysis of the effect of noise in a CDS system has been described by Kansy [12], and guidelines for design are given by [13]. A disadvantage of correlated double sampling is that it increases the mean-square thermal noise by a factor of two since two samples of uncorrelated thermal noise are acquired and subtracted.…”

Section: A General Operationmentioning

confidence: 99%

Sub-femtofarad capacitive sensing for microfabricated transducers using correlated double sampling and delta modulation

Ranganathan¹,

Inerfield²,

Roy³

et al. 2000

IEEE Trans. Circuits Syst. II

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The theory, design, and measured performance of a circuit which measures very small capacitances, particularly suitable for microfabricated sensors relegated to a high parasitic environment, is presented. The circuit uses an existing capacitive sensing ASIC configured as a delta modulator to achieve a sense resolution of 0.53 fF at a 6-kHz sample rate in the presence of board-level parasitics. The applicability of the circuit to microfabricated sensors has been successfully demonstrated using a bulk-micromachined vertical transducer that is similar to many pressure sensors and accelerometers.

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A 32-channel charge readout IC for programmable, nonlinear quantization of multichannel detector data

Cited by 13 publications

References 11 publications

Full breast digital mammography with an amorphous silicon‐based flat panel detector: Physical characteristics of a clinical prototype

Full breast digital mammography with an amorphous silicon‐based flat panel detector: Physical characteristics of a clinical prototype

Clinical and Technical Evaluation of Full Field Digital Mammography

Sub-femtofarad capacitive sensing for microfabricated transducers using correlated double sampling and delta modulation

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