SPECT Liver Function Assessment via Radioactive Tracer Kinetics
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Solution Overview
Problem
Current methods for assessing liver health, such as liver biopsy, are invasive and subjective, and struggle with variability in results due to clinician interpretation and anatomical differences, making non-invasive, objective quantification of hepatic function challenging.
Innovation Solution
A computer-based system utilizing a SPECT scanner to detect radiation counts and calculate parameters like perfused hepatic mass by identifying regions of interest in liver and spleen images, providing a quantitative and reproducible assessment of liver health.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If liver biopsy is used to assess liver health, then diagnostic information can be obtained, but the method is invasive and subject to variability in results
Solution Approach 1:
The patent replaces the mechanical invasive biopsy procedure with a non-invasive SPECT imaging system that uses radioactive tracers to assess liver function. The system detects gamma radiation emitted by the tracer to generate functional images of the liver, eliminating the need for physical tissue removal while providing quantitative functional assessment.
Solution Approach 2:
The patent introduces a radioactive tracer compound as an intermediary substance that mediates between the imaging system and the liver tissue. The tracer accumulates in the liver based on its functional state, allowing indirect measurement of liver health without direct mechanical intervention. The tracer acts as a bridge that translates physiological function into detectable radiation signals.
2Loss of information
If liver biopsy is used for liver health assessment, then diagnostic data can be obtained, but the results are subjective and vary by clinician interpretation
Solution Approach 1:
The patent implements quantitative feedback through automated image analysis algorithms that process SPECT images to generate objective functional parameters. The system calculates standardized metrics such as liver-to-spleen uptake ratios and perfusion indices, providing consistent, reproducible measurements that eliminate subjective interpretation variability while maintaining diagnostic information quality.
Solution Approach 2:
The patent transforms subjective visual assessment into objective quantitative parameters by measuring specific physical quantities from SPECT images. The system extracts numerical values such as radioactivity counts, organ volumes, and uptake ratios, converting qualitative clinical judgment into precise, comparable numerical data that reduces information loss and improves measurement precision.
3Object-affected harmful factors
If traditional imaging methods are used to assess liver function, then non-invasive assessment is possible, but quantitative functional measurement is limited
Solution Approach 1:
The patent changes the measurement parameters from anatomical structure assessment to functional quantification by using radioactive tracer kinetics. The system measures dynamic parameters such as tracer uptake rate, retention percentage, and organ-to-background ratios, providing precise quantitative functional data while maintaining non-invasive imaging.
Solution Approach 2:
The patent creates a functional copy of liver physiology through tracer kinetics modeling. Instead of directly measuring complex liver functions, the system uses the tracer's behavior as a surrogate model that replicates and reflects liver functional states, enabling indirect but quantitative functional assessment through measurable radiation signals.
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 offers a non-invasive, objective, and reproducible method for evaluating liver health, reducing variability and subjectivity, and enabling clinicians to make informed decisions with accurate, quantifiable data.
Implementation Method 1
The SPECT scanner can obtain the image data by at least detecting radiation counts responsive to administration of a radioactive compound to the patient
Data Source
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AI summary
Systems and methods described herein determine an objective metric for analyzing health of a patient's liver. In some embodiments, the system may include a scanner that can detect radiation counts responsive to administration of radioactive compound to a patient. Further, the system may include an image detection module that can access image data responsive to the detected radiation counts by the scanner. The image detection module can programmatically identify a first region of interest corresponding to a liver of the patient from the image data. A parameter calculator module can programmatically determine a first attribute associated with the first region of interest and calculate a first parameter indicating health of the liver of the patient based at least in part on the first attribute associated with the first region of interest.