&lt;title&gt;Amorphous silicon x-ray image sensor&lt;/title&gt;

Chabbal, Jean; Chaussat, C.; Ducourant, Thierry; Fritsch, L.; Michailos, Jean; Spinnler, Vincent; Vieux, Gerard; Arques, M.; Hahm, Gerhard; Hoheisel, M.; Horbaschek, Heinz; Schulz, R.; Spahn, M.

doi:10.1117/12.237812

Cited by 54 publications

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“…Angiograms acquired with an AXIOM Artis dFC Magnetic Navigation (Siemens). a Angiography with all three lesions identified: (1) at graft anastomosis, (2) in the posterior lateral artery (PLA) and (3) [48]. With the help of two magnets, providing a magnetic field of up to 0.1 Tesla, the clinician can accurately navigate catheters and guidewires through the vessels and the chambers of the heart.…”

Section: New Applications In Angiography and Fluoroscopymentioning

confidence: 99%

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Flat detectors and their clinical applications

Spahn

2005

Eur Radiol

106

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Diagnostic and interventional flat detector X-ray systems are penetrating the market in all application segments. First introduced in radiography and mammography, they have conquered cardiac and general angiography and are getting increasing attention in fluoroscopy. Two flat detector technologies prevail. The dominating method is based on an indirect X-ray conversion process, using cesium iodide scintillators. It offers considerable advantages in radiography, angiography and fluoroscopy. The other method employs a direct converter such as selenium which is particularly suitable for mammography. Both flat detector technologies are based on amorphous silicon active pixel matrices. Flat detectors facilitate the clinical workflow in radiographic rooms, foster improved image quality and provide the potential to reduce dose. This added value is based on their large dynamic range, their high sensitivity to X-rays and the instant availability of the image. Advanced image processing is instrumental in these improvements and expand the range of conventional diagnostic methods. In angiography and fluoroscopy the transition from image intensifiers to flat detectors is facilitated by ample advantages they offer, such as distortion-free images, excellent coarse contrast, large dynamic range and high X-ray sensitivity. These characteristics and their compatibility with strong magnetic fields are the basis for improved diagnostic methods and innovative interventional applications.

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Section: New Applications In Angiography and Fluoroscopymentioning

confidence: 99%

“…Changes of this nature are also taking place in general angiography and in fluoroscopy. Hence, flat detectors put us for the first time in a position to finally realize the vision of obtaining a single technology that covers all applications in X-ray diagnostics and interventional techniques [1][2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Flat detectors and their clinical applications

Spahn

2005

Eur Radiol

106

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“…Digital Subtraction Angiography (DSA), Computerized Axial Tomography (CAT), Diagnostic Ultrasound (US), Magnetic Resonance Imaging (MRI) and Nuclear Medicine Imaging (Nuc-Med) have found their firm place in the Radiology Department. Computed Radiography (CR) is used for the demanding chest format [7][8], and flat panel detectors (DR) are emerging for the chest format as well as for mammography [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of 8 bits versus 11 bits softcopy displays

et al. 2005

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This paper presents the outcome of an initial study to compare softcopy displays (Liquid Crystal Displays) with 8 bits contrast resolution with those of 11 bits contrast resolution. Of particular interest was decreased detection of objects and appearance of artifacts like false contours as a result of quantization. The study was based on simulation of objects like squares, discs and Gaussian nodules at different amplitudes on uniform backgrounds. We also placed simple objects like disks and Gaussian objects into a clinical image. These objects were displayed on the two different types of displays to untrained observers. These objects were also analyzed quantitatively in their digital form with a computer program made for display and analysis. The study found that subtle objects can be missed and artifacts such as false contours can occur, dependent on signal amplitude and noise. A comprehensive observer study is necessary to confirm and refine these results.

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“…They have found their firm place in the Radiology Department. Computed Radiography (CR) is used for the demanding chest format [7][8], and flat panel detectors (DR) are emerging for the chest format as well as for mammography [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Grayscale resolution of LCD displays: 8 bits vs. 11 bits

et al. 2005

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This paper presents a few results of an initial study to compare softcopy displays with 8 bits contrast resolution with those of 11 bits contrast resolution. Particular interest was paid to failure to detect subtle objects and appearance of artifacts like false contours as a result of improper quantization. Objects like squares, discs and Gaussian nodules were simulated at different amplitudes on uniform backgrounds. Another approach was to place simple objects like disks and Gaussian objects into a clinical image. The study concluded that indeed subtle objects can be missed and artifacts such as false contours can occur, dependent on signal amplitude and noise. A comprehensive observer study is under development to confirm and refine these results.

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<title>Amorphous silicon x-ray image sensor</title>

Cited by 54 publications

References 0 publications

Flat detectors and their clinical applications

Flat detectors and their clinical applications

Evaluation of 8 bits versus 11 bits softcopy displays

Grayscale resolution of LCD displays: 8 bits vs. 11 bits

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