Validation study demonstrates accurate sensorless ultrasound frame positioning in phantoms and breast scans, highlighting reliable hardware-free three-dimensional imaging.
For ultrasonographic B-scan images collected by means of a handheld transducer moving in the elevational direction, frame spacings are computed with a speckle-decorrelation algorithm, without additional positioning hardware. Fully developed speckle volumes are automatically segmented and spacing computed from the decorrelation curves. Position accuracy is within 10% for phantoms and 15% for breast studies. The algorithm provides image-based registration, which allows accurate three-dimensional volume rendering.
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Tuthill et al. (1998) studied this question.
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