PET and SPECT performance of the Siemens HD3 e.cam/sup duet//spl reg/ : a 1" Na(I) hybrid camera
Bibliographic record
Abstract
Siemens has recently developed a new PET/SPECT dual head camera, the e.cam/sup duet//spl reg/. This camera employs two HD3 detectors with 1" thick Na(I) segmented crystals. This design, relatively new for Na(I), is aimed at increasing the stopping power for 511 keV /spl gamma/ rays, while maintaining good spatial resolution for SPECT. The PET performance of this camera was evaluated using the new NEMA NU2-2001 specifications. The effect of the thicker crystal on the camera's performance in the single photon acquisition mode was assessed by comparing its resolution and sensitivity to that obtained with a standard gamma camera with a 3/8" crystal. The Siemens exam was selected for this purpose as it is a very similar dual-head variable-angle system with several hardware and software elements identical to the e.cam/sup duet//spl reg/ camera.
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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 | 0.001 | 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 | 0.002 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 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".