قارن الطرق

	تصوير القابلية المغناطيسية الكمي	تصوير الأوعية المقطعي البصري التوافقي (OCT Angiography)
المجال	التصوير الطبي	التصوير الطبي
العائلة	Process / pipeline	Process / pipeline
سنة النشأة	2015	2012
صاحب الطريقة	Yong Wang	Yali Jia
النوع	Quantitative MRI contrast mechanism	Optical imaging technique for vasculature visualization
المصدر التأسيسي	Wang, Y., Liu, T. (2015). Quantitative susceptibility mapping (QSM): Decoding MRI data for a tissue magnetic biomarker. Magnetic Resonance in Medicine, 73(1), 82-101.	Jia, Y., Tan, O., Tokayer, J., et al. (2012). Split-spectrum amplitude-decorrelation angiography with optical coherence tomography. Optics Express, 20(4), 4710-4725.
الأسماء البديلة	QSM, susceptibility-weighted imaging	OCTA, OCT-A
ذات صلة	5	5
الملخص	Quantitative Susceptibility Mapping (QSM) is a post-processing technique that converts MRI phase data into quantitative susceptibility values, enabling direct visualization and measurement of tissue magnetic properties. Developed by Wang, Liu, and colleagues, QSM transforms phase shifts caused by differences in magnetic susceptibility between tissues into tissue-specific biomarkers. It has revolutionized the sensitivity of MRI to iron, calcium, and other paramagnetic and diamagnetic substances, making it valuable in neurodegenerative disease diagnosis and tissue characterization.	Optical Coherence Tomography Angiography (OCTA) is a non-invasive imaging technique that visualizes the microvasculature in the retina and choroid by detecting motion contrast from flowing blood. Developed by Jia and colleagues in 2012, OCTA uses repeated OCT scans of the same tissue location to identify blood flow based on the decorrelation signal. It has become a critical diagnostic tool in ophthalmology for detecting retinal and macular diseases without requiring fluorescein injection.