Design considerations for an industrial diode array digital radiography system

Fry, David A.; Pearsall, C.R.; Guu, A.C.

doi:10.1016/0883-2889(90)90183-h

Cited by 6 publications

(5 citation statements)

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“…Research to evaluate the use of scintillating fiber optics (SFO) to replace traditional phosphor screens as an imaging detector in a digital radiographic system is presented. A SFO-based detector was constructed for a Diode Array Digital Radiography (DADR) system [1]. System image quality was evaluated with five characterization criteria: spatial resolution, signal-to-noise ratio (SNR), large-area contrast detectability, responsivity, and inspection task performance.…”

Section: Ethodologymentioning

confidence: 99%

“…In area digital radiographic systems, the entire image area is exposed to an area x-ray beam at the same time with the detector covering the entire area. This is the only true real time an image functionally equivalent to a film image may be produced with a DADR system [72]. For those cases, when the high spatial resolution is not necessary, DADR m ay produce an image as good as or better then that recorded on films.…”

Section: Digital Radiography and Dadr Systemmentioning

confidence: 99%

“…Note the reflection loss has no effect for the unguided light and, therefore, has been ignored. Because For the x-ray input, the average PSF can be expressed as The results show that the spatial resolution has no significant decrease, when (1). the detector thickness increases from 0.5 cm to 2.0 cm,…”

Section: Energy Depositionmentioning

confidence: 99%

“…DADR was invented at the University of Pittsburgh by a team lead by Sashin[71].The intent was to develop a radiographic system which provides an image quality equal to or exceeding that of conventional film-screen radiography at a lower dose to the patient. Using the DADR technique, Scantech Corporation has developed systems for industrial Non-Destructive Testing (NDT)[72].…”

mentioning

confidence: 99%

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Scintillating fiber optics and their application in radiographic systems

Shao

Miller

Pearsall³

1991

IEEE Trans. Nucl. Sci.

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Section: Ethodologymentioning

confidence: 99%

Section: Digital Radiography and Dadr Systemmentioning

confidence: 99%

Section: Energy Depositionmentioning

confidence: 99%

mentioning

confidence: 99%

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Scintillating fiber optics and their application in radiographic systems

Shao

Miller

Pearsall³

1991

IEEE Trans. Nucl. Sci.

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“…The intent was to develop a radiographic system which provides image quality equal to or exceeding that of conventional film-screen radiography with lower dose to the patient. Using the DADR technique, Scantech Corporation has developed systems for industrial nondestructive testing (NDT) [2].…”

mentioning

confidence: 99%

The Application Of Scintillating Fiber Optics In A Diode Array Digital Radiography System

Shao

Miller²,

Pearsall³

et al.

1990 IEEE Nuclear Science Symposium Conference Record

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Research to evaluate the use of scintillating fiber optics (SFO) to replace traditional phosphor screens as an imaging detector in a digital radiographic system is presented. A SFO-based detector was constructed for a Diode Array Digital Radiography (DADR) system. System image quality was evaluated with five characterization criteria: spatial resolution, signal-to-noise ratio (SNR), large-area contrast detectability, responsivity, and inspection task performance. It has been concluded from this evaluation that the spatial resolution, SNR and large-area contrast detectability are superior to that observed with phosphor screens. Spatial resolution is typically 8-9 line-pairs/" (lp/mm) for SFO, while the phosphor screen resolution was typically 2-6 lp/mm. However, responsivity (i.e., the system sensitivity), with SFO is much lower than measured with phosphor screens. absorption efficiency of SFO is high, the overall efficiency is lower than for phosphor screens. By adjusting the gains of an image intensifier and an electronic amplifier, an adequately large signal output for a feasible x-ray dose input was obtained with the SFO system. The SFO system has produced images of electronic assemblies and met the requirements of the ASTM 801E #4. The experimental results indicate that the SFO detector is comparable to phosphor screens at low x-ray energies ( < 300 KVp), and is expected to have superior performance for higher energy photon detection.In this energy range, although the x-ray INTRODUCIIONThe objective of this research was to evaluate the use of scintillating fiber optics (SFO) to replace traditional phosphor screens as the imaging detector in a digital radiographic system. x-ray image quality is a function of two basic factors: number of photons detected per unit area and the spreading of the x-ray image inherent in the

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