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Ambient illumination revisited: a new adaptation-based approach for optimizing medical imaging reading environments.
Ambient lighting in soft-copy reading rooms is currently kept at low values to preserve contrast rendition in the dark regions of a medical image. Low illuminance levels, however, create inadequate… Expand
Pencil beam coded aperture x-ray scatter imaging
We use coded aperture x-ray scatter imaging to interrogate scattering targets with a pencil beam. Observations from a single x-ray exposure of a flat-panel scintillation detector are used to… Expand
Non-Steroidal Drug-induced Gastrointestinal Toxicity: Mechanisms And Management
Non-steroidal anti-inflammatory drugs are among the most frequently prescribed drugs worldwide. Because of their ‘over-thecounter’ (OTC) availability, they are also consumed on non-prescription basis… Expand
Gap Between Evidence and Patient Access: Policy Implications for Bariatric and Metabolic Surgery in the Treatment of Obesity and its Complications
Despite consistently supportive evidence of clinical effectiveness and economic advantages compared with currently available non-surgical obesity treatments, patient access to bariatric and metabolic… Expand
Object detectability at increased ambient lighting conditions.
- Benjamin J. Pollard, A. Chawla, D. DeLong, N. Hashimoto, E. Samei
- Physics, Medicine
- Medical physics
- 1 June 2008
Under typical dark conditions encountered in diagnostic reading rooms, a reader's pupils will contract and dilate as the visual focus intermittently shifts between the high luminance display and the… Expand
Analyzing the effect of dose reduction on the detection of mammographic lesions using mathematical observer models
- A. Chawla, R. Saunders, C. Abbey, D. Delong, E. Samei
- Engineering, Mathematics
- SPIE Medical Imaging
- 2 March 2006
The purpose of this study was to determine the effect of dose reduction on the detectability of breast lesions in mammograms. Mammograms with dose levels corresponding to 50% and 25% of the original… Expand
Determining the MTF of Medical Imaging Displays Using Edge Techniques
- A. Chawla, H. Roehrig, J. J. Rodriguez, J. Fan
- Computer Science, Medicine
- Journal of Digital Imaging
- 2 September 2005
The modulation transfer function (MTF) of a medical imaging display is typically determined by measuring its response to square waves (bar patterns), white noise, and/or line stimuli. Expand
Optimized image acquisition for breast tomosynthesis in projection and reconstruction space.
Breast tomosynthesis has been an exciting new development in the field of breast imaging. While the diagnostic improvement via tomosynthesis is notable, the full potential of tomosynthesis has not… Expand
Effect of dose reduction on the detection of mammographic lesions: a mathematical observer model analysis.
The effect of reduction in dose levels normally used in mammographic screening procedures on the detection of breast lesions were analyzed. Four types of breast lesions were simulated and inserted… Expand
The Effects of Ambient Lighting in Chest Radiology Reading Rooms
- Benjamin J. Pollard, E. Samei, +7 authors H. McAdams
- Medicine, Computer Science
- Journal of Digital Imaging
- 14 February 2012
Under typical dark chest radiography reading room conditions, a radiologist’s pupils contract and dilate as their visual focus intermittently shifts between the high luminance monitor and the darker background wall, resulting in increased visual fatigue and degradation of diagnostic performance. Expand