Precision Dose Calibrator for Hot Cell Use in Nuclear Medicine

The Precision Dose Calibrator is specifically engineered for operation inside lead-shielded hot cells within nuclear medicine departments. Its compact ionization chamber fits through standard 12–15 cm access ports, allowing permanent installation within the hot cell while the control unit remains outside for safe remote operation. This design fundamentally addresses the two greatest challenges in radiopharmacy: measurement accuracy and occupational radiation exposure.

This dose calibrator is designed for daily preparation of patient-specific radiopharmaceutical doses. Primary applications include measuring Tc-99m eluates from molybdenum generators, dispensing F-18 FDG for PET/CT scans, quantifying I-131 capsules for thyroid therapy, and verifying Lu-177 doses for peptide receptor radionuclide therapy (PRRT). The instrument supports vial, syringe, and pill geometries, making it suitable for both diagnostic and therapeutic nuclear medicine procedures. It is equally effective in centralized radiopharmacies serving multiple hospitals and in hot cells dedicated to a single PET/CT suite. Additional applications include quality control testing of generator eluates, measuring decay-corrected activity for time-delayed administrations, and verifying doses before injection or administration. The calibrator also supports research applications such as radiolabeling studies and novel tracer development where precise activity measurement is critical.

The Precision Dose Calibrator delivers measurement accuracy of ±5% or better across its entire dynamic range from 1 μCi to 10 Ci. Automatic range switching ensures stable readings without manual adjustment. The remote display unit, positioned outside the hot cell, shows real-time activity in mCi or MBq with selectable nuclide-specific calibration settings. A preprogrammed library of more than 20 common medical isotopes (including Tc-99m, F-18, I-131, Lu-177, Ga-68, Y-90, and Ac-225) eliminates manual factor entry and reduces operator error. The response time is typically under 5 seconds per measurement, enabling high-throughput dose preparation during busy morning schedules. Background subtraction and auto-zeroing functions maintain accuracy even when the hot cell contains multiple stock vials or radioactive waste. The ionization chamber features corrosion-resistant construction to withstand daily decontamination with alcohol or mild detergents. For nuclear medicine departments, the key benefits are threefold: reduced technician radiation exposure by keeping personnel outside the shielded cell, improved dose accuracy that supports regulatory compliance and patient safety, and faster workflow that allows more patients to be served each day. The instrument includes a printer port and USB data export for maintaining permanent dose records — essential for audits and radiation safety reporting. With its combination of precision, safety, and ease of use, this dose calibrator represents a foundational tool for any nuclear medicine hot cell operation.