Figure 6
Excised Human Thyroid. A) X-ray of an excised thyroid tissue from cadaver; B) US C-scan of the same tissue at 5 MHz; C) VA image using toneburst excitation with Δf = 50 kHz. The image is 50 × 50 mm. D) VA image using CW excitation with Δf = 16.3 kHz. VA images were taken in water tank. All VA images are 50 × 50 mm.