3D SPECT Washout Rate Calculation for Accurate ROI Quantification
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Solution Overview
Problem
Conventional methods for calculating the washout rate of radiopharmaceuticals in regions of interest fail to accurately reflect the true washout rate, leading to incorrect clinical assessments.
Innovation Solution
An image processing method that involves creating three-dimensional information from SPECT data, segmenting it into selected segments, determining representative count values, and calculating the washout rate using a specific formula, allowing for accurate quantification of radiopharmaceutical distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional washout rate calculation methods are used, then the calculation process is simple, but the measurement precision of the washout rate is insufficient and cannot accurately reflect the true washout rate
Solution Approach 1:
The patent divides the region of interest into multiple three-dimensional-information-retaining segments, and calculates the washout rate for each segment separately using representative count values. This segmentation approach improves measurement precision by capturing spatial variations in radiopharmaceutical distribution, while the automated calculation process manages the increased complexity through systematic processing of divided regions.
Solution Approach 2:
The patent transitions from two-dimensional planar imaging to three-dimensional information reconstruction, enabling volumetric analysis of radiopharmaceutical distribution. This dimensional enhancement improves washout rate measurement accuracy by incorporating depth information and creating comprehensive three-dimensional models of organ segments, at the cost of increased computational complexity in data reconstruction and processing.
2Measurement precision
If three-dimensional segmentation method is applied, then the washout rate calculation accuracy is improved, but the device complexity and processing steps increase
Solution Approach 1:
The patent performs preliminary reconstruction of three-dimensional information from SPECT data before washout rate calculation. By pre-processing the imaging data into three-dimensional space and pre-segmenting the regions of interest, the system prepares structured data that facilitates accurate washout rate computation, managing complexity through systematic preliminary processing steps.
Solution Approach 2:
The patent introduces three-dimensional-information-retaining segments as intermediary structures between the raw SPECT data and the final washout rate calculation. These segments serve as intermediate representations that preserve spatial information while enabling simplified calculation operations, acting as a bridge that manages the transformation from complex imaging data to quantitative washout rate metrics.
3Measurement precision
If representative count values of all segments are obtained, then the measurement precision is improved, but the processing time and loss of time increase
Solution Approach 1:
The patent calculates representative count values for all three-dimensional segments within the region of interest, which may be more segments than strictly necessary for basic assessment. This comprehensive approach ensures complete characterization of radiopharmaceutical distribution and maximizes measurement precision, at the expense of increased processing time required to evaluate each segment individually.
Solution Approach 2:
The patent transforms the imaging data into three-dimensional space and extracts representative count values as key parameters for washout rate calculation. By changing the parameter representation from raw image data to segmented count values, the system enables efficient computation of washout rates while preserving essential distribution information, managing the balance between precision and processing efficiency.
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 method provides a more precise calculation of the washout rate, enabling correct clinical diagnosis of conditions like triglyceride deposit cardiomyovasculopathy.
Implementation Method 1
reconstructing data obtained by performing single-photon emission computed tomography (SPECT) imaging on a subject
Data Source
AI summary
The present invention is an image processing method for calculating the washout rate (WR) (%) of a radiopharmaceutical in a region of interest (ROI) of a subject to which the radiopharmaceutical has been administered, the method including a step of calculating the washout rate (%) by Formula (I). (Formula (I) is as defined in Description.)