Malignant lymphnodes No echogenic eccentric hilum Discolored colour Doppler Rounded : RT < 1.5 Size usually >10 mm ∼7 mm in upper jugular chain and 6 mm in ref. Hypoechoeic and
Optical coherence tomography (OCT) is relatively new optical imaging modality that allows high resolution, cross sectional imaging of tissue microstructure. OCT can image c an axial resolution of 1-15 mm