Accuracy Comparison: SCG vs. Gold Standards

This page provides a consolidated view of how Seismocardiography (SCG) compares to established clinical "Gold Standards" like Echocardiography, MRI, and Invasive Pressure Monitoring.

1. Cardiac Timing & Hemodynamics

Study ID	Gold Standard	Metric	Correlation / Accuracy	Conclusion
S001	Echocardiography	Systolic Time Intervals	r = 0.90 - 0.98	SCG is a valid surrogate for LVST/PEP.
S002	MRI	Cardiac Timing Events	95.8% Agreement	SCG accurately identifies AO and AC events.
S034	Echocardiography	Stroke Volume	r = 0.82	SCG can monitor SV trends in CHD patients.
S047	Echocardiography	Diastolic Function (e')	r = 0.71	Diastolic SCG correlates with tissue Doppler.
S044	4D Flow MRI	Aortic Peak Velocity	r = 0.85	Deep learning SCG predicts complex hemodynamics.

2. Structural Heart Disease & Diagnosis

Study ID	Condition	Gold Standard	Performance	Impact
S006	Coronary Artery Disease	Angiography	91% Sensitivity	Highly effective for non-invasive CAD screening.
S044	Aortic Stenosis	4D Flow MRI	AUC 0.99	SCG/DL identifies valvular pathology with high precision.
S013	Heart Failure	Clinical Diagnosis	92% Accuracy	Distinguishes compensated vs. decompensated HF.

3. Rhythm Analysis

Study ID	Condition	Gold Standard	Performance	Note
S017	Atrial Fibrillation	ECG (Holter)	99.9% Sensitivity	Smartphone SCG matches ECG for AFib detection.
S046	AO Peak Detection	Expert Labeling	99.8% Sensitivity	Robust AO detection in field conditions (U-Net v3).

Note: For detailed methodology and population data, please refer to the individual study pages linked via Study ID.