Authorised Indian Distributor
Saxsons Group
New Delhi, India · Since 1997
A precision Co-57 flood source producing a uniform radiation field across the gamma camera's full field of view for uniformity quality assurance per NEMA NU-1-2007. Coefficient of variation ≤0.9% — ensures your SPECT camera performs to specification between service visits.
| Source radionuclide | Cobalt-57 (Co-57) |
| Photon energy | 122 keV (86%) — matched to Tc-99m energy window |
| Half-life | 271.79 days |
| Uniformity (CV) | ≤ 0.9% across active area |
| Integral non-uniformity | ≤ 3.6% (NEMA NU-1-2007) |
| Manufacturing standard | ANSI 42.27 sealed source |
| Calibration traceability | NIST-traceable activity certificate |
| Sizes available | Multiple — to match SPECT camera field of view |
| Transport shielding | Lead-shielded carry case (included) |
| Camera compatibility | All major clinical SPECT / gamma camera platforms |
| Usage type | Intrinsic (collimator off) and extrinsic (collimator on) |
Gamma camera QA — protecting image quality every day
AAPM and AERB-recommended daily flood uniformity acquisition for gamma cameras. Identifies non-functioning PMT modules, crystal damage and electronic instability before patient imaging.
Full NEMA NU-1-2007 integral and differential uniformity measurement. Provides quantitative uniformity metrics for NABH and JCI accreditation records.
Used in combination with point sources for COR measurement in SPECT systems. Correct COR calibration is essential for artefact-free SPECT reconstruction.
The 122 keV energy peak closely matches the 140 keV Tc-99m window for energy resolution verification. Confirms energy discrimination performance of the crystal-PMT array.
New SPECT camera acceptance testing per NEMA NU-1-2007. Quantitative flood uniformity data establishes the baseline for the camera's operational life.
Re-establish uniformity baseline after PMT replacement, crystal repair or major software updates. Confirms the camera meets specification before resuming patient imaging.
Flood source non-uniformity adds directly to the camera's measured uniformity. At ≤0.9% CV, the source contribution is negligible even for the best modern SPECT detectors — you measure camera performance, not source imperfection.
Co-57's 272-day half-life means one source covers 12+ months of daily QA with manageable activity correction. Far more cost-effective than shorter-lived alternatives that require replacement every 2–3 months.
122 keV is close enough to 140 keV to use in the Tc-99m energy window for uniformity testing — yet Co-57's long half-life makes it practical for routine QA. No need to use patient-dose Tc-99m generator eluate for daily camera checks.
Manufacturer product page. Contact Saxsons for AERB documentation, camera-specific sizing and pricing.
Co-57 Flood Source
Each card opens a focused post for a specific specialty — peer-reviewed evidence and clinical workflow, written for the persona you select.
Contact Saxsons Group for Co-57 flood sources, sizing for your camera model and AERB documentation across India.