Capintec CRC55tR Touchscreen Dose Calibrator

Overview

The Capintec CRC55tR Touchscreen Dose Calibrator is a high-precision, portable radioactivity measurement system engineered for quantitative activity determination of radionuclides used in diagnostic and therapeutic nuclear medicine applications. It operates on the fundamental principle of ionization chamber physics: radioactive emissions ionize ultra-pure argon gas under elevated pressure (12 atm) within a thin-walled, deep-well cylindrical chamber. The resulting ion current is linearly proportional to radiation flux and is converted into activity values (Bq or Ci) using nuclide-specific calibration factors stored in non-volatile memory. Designed for clinical radiopharmacy labs, PET cyclotron facilities, and mobile radiopharmaceutical distribution centers, the CRC55tR delivers NIST-traceable accuracy with minimal operator dependency—enabling rapid, repeatable measurements of short-lived isotopes including ^99mTc, ¹⁸F, ⁶⁸Ga, ¹⁷⁷Lu, and ⁹⁹Mo eluate.

Key Features

• 8-inch VGA color touchscreen interface with intuitive, menu-driven navigation—no external keyboard or mouse required
• Dual-chamber compatibility support via firmware architecture (optional upgrade path for future multi-chamber configurations)
• Automated quality assurance suite: real-time auto-zeroing, background subtraction, linearity verification, geometry testing, and daily stability checks
• Pre-programmed nuclide library with >28 user-definable keys for rapid selection of common isotopes and custom radiopharmaceuticals
• High-pressure (12 atm) argon-filled thin-wall well chamber optimized for high sensitivity and low energy dependence across 20 keV–3 MeV photon range
• Integrated diagnostics engine performing continuous RAM/ROM integrity validation, HV supply monitoring, and electrometer drift compensation
• Compact console design (3.4 kg) with detachable chamber (13.6 kg) for flexible deployment in hot labs, clean rooms, or transport vehicles

Sample Compatibility & Compliance

The CRC55tR accommodates standard nuclear medicine sample geometries—including vials (1–30 mL), syringes (up to 20 mL), and CAPMAC metal cartridges—within its 6.1 cm diameter × 25.4 cm depth well. It complies with regulatory expectations outlined in U.S. NRC 10 CFR Part 35 Subpart I, AAPM Task Group 181, and ISO/IEC 17025 for accredited dose calibrator testing. All factory calibrations are traceable to NIST Standard Reference Materials (SRMs), and the system supports GLP/GMP audit trails when paired with compliant data management software. Routine QA tests—including constancy, linearity, geometry, and reproducibility—are fully automated and documented per IAEA Human Health Reports No. 7.

Software & Data Management

The embedded operating system enables local storage of ≥1,000 measurement records with timestamp, operator ID, nuclide, activity, uncertainty, and QC status. Data export is supported via RS-232 or USB to LIS/RIS/PACS environments using ASTM E1384-compliant HL7 messaging or CSV format. Optional Capintec DoseCal™ PC software provides advanced reporting (PDF/Excel), trend analysis, electronic signature capture, and 21 CFR Part 11 compliance modules—including role-based access control, audit log retention, and electronic record integrity verification. Printer integration supports Epson roll-feed, flat-bed, and Okidata dot-matrix models for hardcopy generation of full QA reports or single-measurement receipts.

Applications

• Pre-administration dose verification of ^99mTc-labeled agents (e.g., MDP, HMPAO, Sestamibi) and PET tracers (¹⁸F-FDG, ⁶⁸Ga-DOTATATE)
• Eluate assay and ⁹⁹Mo/^99mTc generator yield calculation
• Radiochemical purity validation through sequential decay-corrected measurements
• Quality control of radiolabeled antibodies, peptides, and nanoparticles in translational research settings
• Field-based environmental monitoring of airborne or filtered gaseous radionuclides (e.g., ¹³¹I, ¹³³Xe) when used with approved gas-tight sample holders
• Regulatory submission support for IND/IDE applications requiring documented metrological traceability

FAQ

Does the CRC55tR require annual recalibration by an accredited laboratory?
Yes. Capintec recommends annual NIST-traceable recalibration performed by an ISO/IEC 17025-accredited service provider, with interim constancy checks conducted daily per AAPM TG-181 guidelines.
Can the system measure beta-emitting isotopes like ³²P or ⁹⁰Y directly?
No. The CRC55tR is optimized for photon-emitting radionuclides. Beta-only emitters require dedicated liquid scintillation or ionization chamber systems with appropriate window thickness and shielding configuration.
Is firmware update capability available over USB without third-party tools?
Yes. Firmware updates are distributed as signed .bin files and installed directly via USB flash drive using the built-in bootloader—no proprietary dongles or network dependencies required.
What is the typical warm-up time before first measurement?
Less than 30 minutes after power-on, during which the high-voltage supply stabilizes and internal temperature equilibrates to minimize electrometer drift.
How does the system handle cross-calibration between different radionuclides?
Each nuclide is assigned a unique calibration factor derived from chamber response curves measured against NIST-traceable standards; no interpolation or extrapolation is applied—the system uses only empirically validated coefficients stored in protected memory.