Automated Ammonia Nitrogen-13 Delivery System for PET Imaging

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Solution Overview

Problem

Current systems for delivering ammonia nitrogen 13 for PET imaging are limited in capacity, processing only up to six vials at a time and do not effectively minimize exposure to radiation, necessitating a system capable of on-demand delivery and improved safety.

Innovation Solution

A manually portable delivery system capable of loading and delivering 20 vials of ammonia nitrogen 13, incorporating a self-contained design with a single point waste location and reduced radiation exposure, utilizing a series of input and output lines, and components like a reel assembly, gun assembly, and computerized control for efficient and safe handling.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a cyclotron is placed within 15 minutes of the PET suite for on-site ammonia nitrogen 13 production, then the availability and purity of the radiopharmaceutical is improved, but the radiation exposure risk to personnel increases

Engineering Contradiction:

Improveavailability of ammonia nitrogen 13VSAvoidradiation exposure

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The system divides the delivery process into discrete segments: automated vial loading, automated purification cartridge installation, automated fluid delivery, and automated waste disposal. Each operation is isolated and controlled by a computer program, eliminating the need for manual intervention during radiation-intensive operations while maintaining on-site production capability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces an automated delivery system as an intermediary between the cyclotron production source and the PET suite administration. This automated system handles all radiation-exposed operations, acting as a mediator that protects personnel while ensuring reliable delivery of the radiopharmaceutical.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Measurement precision

If manual handling of ammonia nitrogen 13 is performed to ensure precise control, then the accuracy of delivery is improved, but the radiation exposure to operators increases

Engineering Contradiction:

Improvedelivery accuracyVSAvoidradiation exposure

Core Design Contradiction:

Measurement precisionVSObject-affected harmful factors

Solution Approach 1:

The patent replaces manual mechanical operations with an automated computer-controlled system. The computer program automatically controls fluid delivery rates, timing, and purification processes, eliminating the need for operators to manually handle radioactive materials while maintaining precise control over the delivery accuracy.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The system is designed to perform all critical operations autonomously through automated vial loading, automated cartridge installation, and automated fluid delivery control. The system serves itself by eliminating the need for human operators during radiation-exposed operations, thereby protecting personnel while maintaining precision.

Inventive Principle:

Principle #25Self-service

3Productivity

If the system processes only up to six vials at a time to maintain simplicity, then the device complexity is reduced, but the productivity and efficiency decrease

Engineering Contradiction:

Improvevial processing capacityVSAvoidsystem complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The automated delivery system is designed with universal components that can handle multiple vials through standardized procedures. The same automated mechanisms used for single-vial delivery are extended to handle sequences of vials, allowing the system to process six or more vials without proportionally increasing complexity. The computer program coordinates multiple operations using the same hardware resources.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The system enables on-site, on-demand delivery of ammonia nitrogen 13, minimizing radiation exposure and increasing processing capacity, while maintaining safety and efficiency in handling radioactive materials.

Implementation Method 1

The mixture is passed through an anion-exchange resin to remove all anionic impurities, including nitrates and nitrites.

Methodology Applied

Scientific EffectAnion-exchange: Ion Exchange

Implementation Method 2

Nitrogen 13 is a cyclotron produced radionuclide by a 16 O (p, α) 13 N irradiation reaction with protons. That is, when oxygen 16 is bombarded with protons, it causes the emission of α-particles and production of nitrogen 13.

Methodology Applied

Scientific EffectNuclear reaction: Nuclear Fission

Implementation Method 3

Nitrogen 13 decays by emitting a positron to Carbon 13.

Methodology Applied

Scientific EffectRadioactive decay: Radioactive Decay

Data Source

PatentUS9987414B2System for delivery of fluids such as ammonia nitrogen 13

Publication Date: 2018.06.05 BARS EROL

AI summary

This invention is directed to a delivery system that is able to deliver fluids, namely, ammonia nitrogen 13. Moreover, the delivery system is self-contained, manually portable, and capable of safely and effectively delivering ammonia nitrogen 13. Finally, the delivery system is capable of supplying up to 20 vials of fluid.