مقایسهٔ روش‌ها

	دگزا	آنژیوگرافی OCT
حوزه	تصویربرداری پزشکی	تصویربرداری پزشکی
خانواده	Process / pipeline	Process / pipeline
سال پیدایش	1987	2012
پدیدآور	Harold Wahner	Yali Jia
نوع	X-ray-based bone density measurement	Optical imaging technique for vasculature visualization
منبع بنیادین	Kanis, J. A. (1994). Assessment of fracture risk and its application to screening for postmenopausal osteoporosis. World Health Organization Technical Report Series, 843, 1-129.	Jia, Y., Tan, O., Tokayer, J., et al. (2012). Split-spectrum amplitude-decorrelation angiography with optical coherence tomography. Optics Express, 20(4), 4710-4725.
نام‌های دیگر	Dual X-ray absorptiometry, DXA, bone densitometry	OCTA, OCT-A
مرتبط	5	5
خلاصه	Dual-Energy X-ray Absorptiometry (DEXA or DXA) is a non-invasive imaging technique that quantifies bone mineral density (BMD) by measuring the attenuation of X-rays at two different energies as they pass through bone and soft tissue. First developed by Wahner and colleagues in 1987, DEXA has become the gold standard for osteoporosis screening and fracture risk assessment. It is recommended by the World Health Organization for diagnosing osteoporosis and monitoring treatment response.	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.