Radiopharmaceutical Injector With Radiation Particle Detection
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Solution Overview
Problem
Conventional systems for the distribution, handling, and administration of radiopharmaceuticals face challenges such as limited applicability, potential radiation exposure, complex regulatory requirements, and issues with precise volumetric delivery, leading to inefficiencies and safety concerns.
Innovation Solution
A system comprising a storage device with a housing and a vessel, a door mechanism, and a fluid cassette that allows for automated and precise delivery of therapeutic or diagnostic agents, including radiopharmaceuticals, with integrated shielding and data authentication, connected to an injector system for accurate dosing and handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional systems are used for distribution and handling of radiopharmaceuticals, then radiation exposure risk increases and safety concerns arise, but automated systems with integrated shielding require more complex device structure
Solution Approach 1:
The system employs nested shielding structures where inner vessels containing radiopharmaceuticals are placed within intermediate shielding layers, which are themselves contained within outer housing structures. This multi-layer nested arrangement provides progressive radiation attenuation while maintaining a compact overall form factor, reducing radiation exposure without requiring excessively complex external systems.
Solution Approach 2:
The system introduces intermediary components such as shielding walls, transfer chambers, and automated manipulation mechanisms that act as mediators between the radiopharmaceutical source and operators. These intermediaries enable safe handling and delivery of radioactive materials without direct human contact, reducing radiation exposure while the automation integrates these functions into a coordinated system.
2Measurement precision
If manual handling and administration of radiopharmaceuticals is performed, then operational simplicity is maintained, but human error increases and dosing precision deteriorates
Solution Approach 1:
The system incorporates self-calibrating dosing mechanisms where the automated delivery system performs its own verification and adjustment of dosing parameters. Sensors and control systems automatically monitor and adjust flow rates, volumes, and timing to ensure precise delivery without requiring manual calibration or intervention, achieving high dosing precision through self-regulating mechanisms.
Solution Approach 2:
The system replaces manual mechanical handling with automated fluid delivery mechanisms, electronic sensing, and computer-controlled manipulation. This substitution of mechanical manual operations with automated systems enables precise volumetric delivery and dosing while reducing human error, though it increases system complexity through the integration of electronic and automated components.
3Reliability
If radiopharmaceuticals are stored and transported using conventional methods, then regulatory compliance becomes more difficult, but specialized storage devices with shielding and access control improve safety
Solution Approach 1:
The storage device is designed with multi-functionality to satisfy multiple regulatory requirements simultaneously. It incorporates radiation shielding, temperature control, access control, and tracking capabilities within a single integrated system, enabling compliance with diverse regulatory standards without requiring separate specialized devices for each function.
Solution Approach 2:
The system merges multiple safety and compliance functions into unified components. For example, shielding structures are integrated with access control mechanisms, and storage containers are combined with tracking and monitoring systems. This consolidation achieves comprehensive regulatory compliance while reducing the number of separate complex devices needed.
4Measurement precision
If on-site dose calibrators are required for precise dosing, then dosing accuracy is improved, but the need for additional equipment and on-site calibration increases device complexity and operational time
Solution Approach 1:
The system uses pre-calibrated reference data and manufacturing-time calibration information stored in memory or on tags attached to the radiopharmaceutical containers. Instead of requiring physical dose calibrators at the administration site, the system retrieves and uses calibration data that was established during manufacturing or initial filling, eliminating the need for additional calibration equipment while maintaining dosing accuracy.
Solution Approach 2:
Dose calibration and verification are performed in advance during the manufacturing or initial filling process. The calibrated information is then stored with the radiopharmaceutical product, allowing the administration system to use pre-validated dosing parameters without requiring on-site calibration equipment. This preliminary action transfers the calibration function from the point of use to the point of production.
Data Source
AI summary
A fluid injector system includes at least one fluid reservoir having a first fluid reservoir configured for injecting a radiopharmaceutical and a radiation filter in fluid communication with the at least one fluid reservoir. The radiation filter is configured for retaining radioactive particles from the radiopharmaceutical passing though the radiation filter. The system further includes at least one sensor configured to detect radioactivity in at least one of the first fluid reservoir, the radiation filter, and a fluid path element in fluid communication with the radiation filter; and a controller in operative communication with the at least one sensor. The controller is programmed or configured to receive a radioactivity measurement from the at least one sensor and determine, based on the radioactivity measurement, that an amount of radioactive particles in at least one of the first fluid reservoir, the radiation filter, and the fluid path set satisfies a predetermined threshold.