Multi-detector Imaging System for Resolution Sensitivity Tradeoff

Solution Overview

Problem

Nuclear medicine imaging systems face a tradeoff between resolution and sensitivity in collimator design, often resulting in suboptimal imaging performance for specific applications due to compromises in field of view, resolution, and sensitivity levels.

Innovation Solution

A method and system that utilize a narrow field-of-view camera positioned at multiple imaging positions to acquire and analyze emission counts, generating a value indicating the probability of a successful medical procedure, optimizing imaging characteristics for improved accuracy and sensitivity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If a high-resolution collimator is used to view a narrow column of activity, then spatial resolution is improved, but sensitivity is reduced

Engineering Contradiction:

Improvespatial resolutionVSAvoidsensitivity

Core Design Contradiction:

Measurement precisionVSQuantity of substance

Solution Approach 1:

The imaging system is divided into multiple detectors arranged in an array, each detector capturing a portion of the radiation field. This segmentation allows the system to achieve high resolution through precise positioning of multiple detectors while maintaining sensitivity through the combined signal from all detectors in the array.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The invention transitions from a single-detector system to a multi-detector array, adding spatial dimensionality to the imaging system. This dimensional expansion allows simultaneous achievement of high resolution (through precise detector positioning) and high sensitivity (through multiple detectors collecting radiation from different angles and positions).

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Quantity of substance

If a high sensitivity collimator is used to accept radiation from a wider range of angles, then sensitivity is improved, but resolution is reduced

Engineering Contradiction:

ImprovesensitivityVSAvoidspatial resolution

Core Design Contradiction:

Quantity of substanceVSMeasurement precision

Solution Approach 1:

The imaging system is divided into multiple detectors arranged in an array, each detector capturing a portion of the radiation field. This segmentation allows the system to achieve high resolution through precise positioning of multiple detectors while maintaining sensitivity through the combined signal from all detectors in the array.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The invention transitions from a single-detector system to a multi-detector array, adding spatial dimensionality to the imaging system. This dimensional expansion allows simultaneous achievement of high resolution (through precise detector positioning) and high sensitivity (through multiple detectors collecting radiation from different angles and positions).

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Measurement precision

If a pinhole collimator with a specific focal length is used, then resolution is improved, but field of view is reduced

Engineering Contradiction:

Improvespatial resolutionVSAvoidfield of view

Core Design Contradiction:

Measurement precisionVSArea of stationary object

Solution Approach 1:

The imaging system is divided into multiple detectors arranged in an array, each detector capturing a portion of the radiation field. This segmentation allows the system to achieve high resolution through precise positioning of multiple detectors while maintaining sensitivity through the combined signal from all detectors in the array.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The multi-detector array system serves multiple functions simultaneously: it provides high resolution imaging through precise detector positioning, maintains a wide field of view through the extended array geometry, and achieves high sensitivity through the combined signal from all detectors. This multi-functionality resolves the tradeoff between resolution and field of view.

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

This approach enables more accurate determination of emission counts and generation of a heart-to-mediastinum ratio, assisting in evaluating medical conditions and predicting the success of procedures like defibrillator implantation with enhanced imaging precision.

Implementation Method 1

detectors (e.g., gamma cameras), typically mounted on a gantry, capture and form images from the radiation emitted by the radiopharmaceuticals

Methodology Applied

Scientific EffectRadiation detection: Radiation

Data Source

PatentUS10568589B2Method and system for performing an imaging scan of a subject

Publication Date: 2020.02.25 GE MEDICAL SYSTEMS ISRAEL LTD

AI summary

A method for performing an imaging scan of a subject includes positioning a narrow field-of-view camera at a first imaging position to acquire a first set of imaging information of a first object of interest, positioning the narrow field-of-view camera at a second imaging position to acquire a second set of imaging information of a second object of interest, determining emission counts for the first and second sets of imaging information, and utilizing the determined emission counts to generate a value that indicates a probability of a successful medical procedure being performed on the subject.