Localization Radiopharmaceutical for Gamma Camera ROI Positioning

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Solution Overview

Problem

Nuclear medicine imaging systems, particularly SPECT and PET, face challenges in accurately positioning regions of interest within the smaller field-of-view of gamma cameras, leading to time-consuming and anxiety-inducing processes for patients due to individual variability and organ size differences.

Innovation Solution

The use of a localization radiopharmaceutical with non-overlapping energy peaks to position a region of interest within the gamma camera's field-of-view before administering an imaging radiopharmaceutical, allowing for precise patient positioning and enabling dynamic imaging in smaller FOV gamma cameras.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If a smaller FOV gamma camera is used, then imaging resolution and focus on ROI are improved, but patient positioning time and complexity increase

Engineering Contradiction:

Improveimaging resolutionVSAvoidpatient positioning time

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The system performs preliminary localization imaging using a localization radiopharmaceutical with different energy peaks before the main imaging procedure. This preliminary action identifies the ROI position in advance, allowing the patient to be positioned correctly before administering the imaging radiopharmaceutical, thereby reducing positioning time and rescans when using small FOV cameras.

Inventive Principle:

Principle #10Preliminary action

2Measurement precision

If manual patient positioning is performed multiple times, then ROI positioning accuracy is improved, but patient anxiety and procedure time increase

Engineering Contradiction:

ImproveROI positioning accuracyVSAvoidpatient anxiety

Core Design Contradiction:

Measurement precisionVSObject-affected harmful factors

Solution Approach 1:

The localization radiopharmaceutical study is performed in advance to determine the ROI position before the patient undergoes the main imaging procedure. This preliminary positioning action eliminates the need for repeated manual positioning adjustments during the actual imaging, reducing patient anxiety and procedure time while maintaining accurate ROI positioning.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system uses feedback from the localization imaging data to automatically adjust patient positioning. The localization radiopharmaceutical provides imaging feedback about ROI position, which is used to guide precise patient positioning before the main imaging study, eliminating guesswork and repeated adjustments that cause patient anxiety.

Inventive Principle:

Principle #23Feedback

3Measurement precision

If dynamic imaging is performed with small FOV gamma cameras, then imaging detail and resolution are improved, but positioning difficulty increases

Engineering Contradiction:

Improveimaging detailVSAvoidpositioning difficulty

Core Design Contradiction:

Measurement precisionVSEase of operation

Solution Approach 1:

For dynamic imaging studies, the system performs preliminary localization imaging using the localization radiopharmaceutical to establish accurate ROI positioning before administering the imaging radiopharmaceutical. This preliminary positioning action ensures that the ROI is correctly positioned within the small FOV before dynamic imaging begins, making the operation easier while maintaining high imaging detail.

Inventive Principle:

Principle #10Preliminary action

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 method reduces the need for multiple rescans and shortens scan times by accurately positioning the region of interest, facilitating dynamic imaging in smaller FOV gamma cameras and enhancing patient comfort.

Implementation Method 1

generating images of a region of interest (ROI) from radioactive emissions from a localization radiopharmaceutical

Methodology Applied

Scientific EffectRadioactive emissions: Radioactive Decay

Implementation Method 2

The image detectors may be gamma cameras that acquire two-dimensional views of three-dimensional distributions of emitted radionuclides

Methodology Applied

Scientific EffectGamma ray detection: Photoelectric Effect

Data Source

PatentUS8455834B2Systems and methods for patient positioning for nuclear medicine imaging

Publication Date: 2013.06.04 GE MEDICAL SYSTEMS ISRAEL LTD

AI summary

Systems and methods for nuclear medicine (NM) imaging using different radiopharmaceuticals are provided. One method includes generating images of a region of interest (ROI) from radioactive emissions from a localization radiopharmaceutical to position the ROI in a field-of-view (FOV) of a gamma camera based on the generated images of the ROI. The method further includes performing an imaging scan of the ROI using an imaging radiopharmaceutical to acquire image data of the ROI, wherein the imaging radiopharmaceutical is different than the localization radiopharmaceutical.