Spatial Modulation of Magnetic Particles in Vasculature
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Solution Overview
Problem
Current methods for detecting analytes in blood are invasive, inconvenient, and often suffer from low signal-to-noise ratios, making it difficult to accurately measure rare or small analytes like circulating tumor cells, especially when measurements are taken non-invasively.
Innovation Solution
A method involving the application of a mask with a spatial arrangement externally to subsurface vasculature, a magnetic field to draw functionalized magnetic particles towards the mask, and detection of response signals to differentiate analyte signals from background noise, allowing for non-invasive detection of target analytes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional sensing techniques are used to detect analytes in blood, then the detection method is simple, but the signal-to-noise ratio is low making it difficult to accurately measure rare or small analytes
Solution Approach 1:
Magnetic particles are introduced as intermediary carriers that bind to target analytes (such as circulating tumor cells). These magnetic particles serve as mediators between the rare analytes and the detection system, enabling the detection system to track and detect the bound analytes through magnetic field manipulation, thereby significantly improving the signal-to-noise ratio for detecting rare analytes
Solution Approach 2:
An alternating magnetic field is applied to induce oscillation or rotation of the magnetic particles that are bound to target analytes. This mechanical vibration creates a dynamic signal that can be detected by the detection system, distinguishing the analyte-bound magnetic particles from background noise and unbound particles, thus improving measurement precision
2Measurement precision
If blood samples are drawn frequently for analyte detection, then analyte levels can be monitored, but the procedure becomes invasive and requires significant patient compliance
Solution Approach 1:
The system enables continuous or frequent monitoring of analyte levels through non-invasive or minimally invasive detection methods. Magnetic particles are introduced into the bloodstream once, and subsequent detections can be performed externally using magnetic fields and detection systems, allowing the system to serve itself by continuously tracking analytes without requiring repeated blood draws from the patient
Solution Approach 2:
The invasive mechanical process of repeated blood drawing is replaced with a non-invasive or minimally invasive magnetic detection system. The magnetic particles circulate in the bloodstream and can be detected externally through skin or tissue using magnetic field manipulation and sensing, substituting the need for mechanical blood collection with a field-based detection approach
3Measurement precision
If large quantities of blood are drawn to catch rare analytes like circulating tumor cells, then statistical significance can be achieved, but the procedure becomes impractical
Solution Approach 1:
Magnetic particles act as concentrated markers that bind specifically to rare analytes such as circulating tumor cells. By introducing these magnetic intermediaries into the bloodstream, the system can detect and concentrate signals from rare analytes without needing to process large volumes of blood, achieving statistical significance with much smaller blood samples
Solution Approach 2:
The alternating magnetic field induces oscillation in the magnetic particles that are bound to rare analytes. This mechanical vibration creates a detectable dynamic signal that amplifies the presence of rare analytes, enabling their detection even when present in very low concentrations, thus achieving high detection sensitivity without requiring large blood volumes
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
Enables real-time, high-density, non-invasive measurement of physiological parameters, including rare analytes, by enhancing signal-to-noise ratios and improving detection sensitivity, reducing the need for invasive procedures.
Implementation Method 1
applying a magnetic field sufficient to draw functionalized magnetic particles present in the body towards a surface of a lumen of subsurface vasculature closest to the mask
Data Source
Figure 1
Figure 2A~2B
Figure 3A~3B
AI summary
A method for modulating a response signal includes introducing functionalized magnetic particles configured to interact with target analytes into the body, applying a magnetic field sufficient to draw the functionalized magnetic particles towards a surface of the lumen of subsurface vasculature closest to an internally or externally applied mask having a spatial arrangement, and detecting a response signal, which includes a background signal and an analyte response signal, transmitted from the subsurface vasculature. The analyte response signal related to interaction of the functionalized magnetic particles with the target analytes and is modulated with respect to the background signal due, at least in part, to the spatial arrangement of the mask. The target analytes may be non-invasively detected by differentiating the analyte response signal from the background signal due, at least in part, to the modulation of the analyte response signal.