Evaluation of detector dynamic range in the x-ray exposure domain in mammography: A comparison between film-screen and flat panel detector systems

Cooper, Virgil N.; Oshiro, Thomas; Cagnon, Christopher H.; Bassett, Lawrence W.; McLeod-Stockmann, Tyler M.; Bezrukiy, Nikita V.

doi:10.1118/1.1606450

Cited by 19 publications

(11 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Mo/ Mo and kVp ranges were selected because they represent common acquisition settings and therefore have wide applicability in the screening situation. As indicated by Cooper et al 50 73% of time the Mo/ Mo spectra with an average of 26.22 kVp is used in the clinical setting.…”

Section: B Numerical Attenuation Estimationsmentioning

confidence: 99%

Effective x‐ray attenuation measurements with full field digital mammography

Heine

Behera

2006

Medical Physics

View full text Add to dashboard Cite

This work shows that effective x-ray attenuation coefficients may be estimated by applying Beer's Law to phantom image data acquired with the General Electric Senographe 2000D full field digital mammography system. Theoretical developments are provided indicating that an approximate form of the Beer's relation holds for polychromatic x-ray beams. The theoretical values were compared with experimentally determined measured values, which were estimated at various detector locations. The measured effective attenuation coefficients are in agreement with those estimated with theoretical developments and numerical integration. The work shows that the measured quantities show little spatial variation. The main ideas are demonstrated with polymethylmethacrylate and breast tissue equivalent phantom imaging experiments. The work suggests that the effective attenuation coefficients may be used as known values for radiometric standardization applications that compensate for the image acquisition influences. The work indicates that it is possible to make quantitative attenuation coefficient measurements from a system designed for clinical purposes.

show abstract

Section: B Numerical Attenuation Estimationsmentioning

confidence: 99%

Effective x‐ray attenuation measurements with full field digital mammography

Heine

Behera

2006

Medical Physics

View full text Add to dashboard Cite

show abstract

“…The reason for this success is due to its great dynamic range, linear relationship between dose and signal intensity, option of contrast enhancement through image processing algorithms, computed-aided diagnosis, and immediate availability of images on the hospital information network. 1,2 Recently ͑FDA approval in 2006͒ GE Healthcare ͑Mil-waukee, WI͒ has put on the market a FFDM named GE Senographe Essential, with a large active field of view whose size is comparable to a traditional 24ϫ 30 cm 2 cassette. In this model some changes in flat panel design were implemented and new deposition tools for metal, a-Si, and CsI͑Tl͒ were introduced by GE.…”

Section: Introductionmentioning

confidence: 99%

Physical characteristics of GE Senographe Essential and DS digital mammography detectors

et al. 2008

View full text Add to dashboard Cite

The purpose of this study was to investigate physical characteristics of two full field digital mammography (FFDM) systems (GE Senographe Essential and DS). Both are indirect conversion (x ray to light) alpha-Si flat panels coupled with a CsI(Tl) scintillator. The examined systems have the same pixel size (100 microm) but a different field of view: a conventional size 23 x 19.2 cm2 and a large field 24 X 30.7 cm2, specifically designed to image large breasts. In the GE Senographe Essential model relevant improvements in flat panel design were implemented and new deposition tools for metal, alpha-Si, and CsI(Tl) were introduced by GE. These changes in detector design are expected to be beneficial for advanced applications such as breast tomosynthesis. The presampling modulation transfer function (MTF), normalized noise power spectrum (NNPS), and detective quantum efficiency (DQE) were measured for a wide range of exposure (25-240 microGy) with a RQA-M2 technique (28 kVp with a Mo/Mo target/filter combination and 2 mm of additional aluminum filtration). At 1, 2, and at 4 lp/mm MTF is equal to 0.9, 0.76, and 0.46 for the conventional field detector and to 0.85, 0.59, and 0.24 for the large field detector. The latter detector exhibits an improved NNPS due to a lower electronic noise and a better DQE that reaches 60%. In addition a contrast-detail analysis was performed with CDMAM 3.4 phantom and CDCOM software: GE Senographe DS showed statistically significant poorer detection ability in comparison with the GE Senographe Essential. These results could have been expected, at least qualitatively, considering the relative DQE of the two systems.

show abstract

“…While film-screen systems were largely contrast-limited, digital detectors do not face the same limitation. 1 The greater dynamic range for digital detectors allows for greater flexibility in the use of radiographic systems. With digital radiography, noise and resolution properties are the primary limiting factors affecting image quality.…”

Section: Introductionmentioning

confidence: 99%

Impact of resolution and noise characteristics of digital radiographic detectors on the detectability of lung nodules

2003

View full text Add to dashboard Cite

One of the unanswered questions in digital radiography is the connection between physical image quality metrics and clinical detection performance. In this paper, we examine the impact of two physical metrics, resolution and noise, on the detectability of nodules in a pulmonary background for specific digital radiographic detectors. A detection experiment was performed on a simulated image set using anatomical backgrounds from a high-quality lung radiograph and three different simulated nodule sizes ͑2-3.5 mm͒. The resolution and noise of the resulting images were modified using existing routines to simulate a selenium-based and a cesium iodide-based flat-panel detector at comparable exposures. A location-known-exactly ͑LKE͒ observer performance experiment was performed in which four experienced chest radiologists and three physicists specializing in chest radiology scored the images. The data from the observer experiment were analyzed by receiver operating characteristic ͑ROC͒ methodology. The detectability, as measured by the parameter A z , was higher for the selenium detector than the cesium iodide detector for all nodule sizes by an average of 8.5%. For one nodule size ͑2.75 mm͒, the difference between detectors was statistically significant (pϽ0.01). The findings indicate that for the particular task studied, the superior resolution performance of the selenium-based detector provided better detectability of subtle lung nodules even though the images had greater noise than images obtained with the cesium iodide detector.

show abstract

Evaluation of detector dynamic range in the x-ray exposure domain in mammography: A comparison between film-screen and flat panel detector systems

Cited by 19 publications

References 15 publications

Effective x‐ray attenuation measurements with full field digital mammography

Effective x‐ray attenuation measurements with full field digital mammography

Physical characteristics of GE Senographe Essential and DS digital mammography detectors

Impact of resolution and noise characteristics of digital radiographic detectors on the detectability of lung nodules

Contact Info

Product

Resources

About