Custom column readout circuitry to extend the dynamic range of a-Si:H current mediated pixel amplifiers for large area diagnostic X-ray imaging applications
Bibliographic record
Abstract
In real-time X-ray fluoroscopy, the patient is continuously exposed to radiation, hence requiring a reduced X-ray dose which results in small input signals to the digital imaging pixel electronics. Conventional switch based amorphous silicon imagers result in poor signal-to-noise ratios (SNR) at low fluoroscopic exposure levels due to noise added by pixel readout electronics. In contrast, amorphous silicon amplified pixels have been reported to give a good SNR for fluoroscopy but their output becomes non-linear for higher doses, limiting their use to low exposure X-ray imaging applications. In this research, we present modifications to column readout amplifier electronics that can extend the dynamic range of an amplified pixel. The larger dynamic range is of particular relevance for amplified pixels used in dual-mode imagers that can switch instantaneously between fluoroscopy and higher contrast chest radiography imaging modes.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".