High-definition freehand 3-D ultrasound

Rapid, easy and reliable calibration for freehand 3D ultrasound

“…In this section, we first present the modifications we have made to current single wall calibration systems used by Prager et al [17] and Treece et al [22]. We then performed and analyzed a number of calibrations in order to measure the reliability of a calibration using a metric based on the curvature of the criterion function.…”

“…We then performed and analyzed a number of calibrations in order to measure the reliability of a calibration using a metric based on the curvature of the criterion function. At the same time, these calibrations were used to compare with the results from Treece et al [22], in order to verify the effectiveness of the modifications we have made to the single wall calibration protocol.…”

Sensorless Reconstruction of Unconstrained Freehand 3D Ultrasound Data

“…The RF vectors were filtered with a 5-10 MHz filter, then envelope detected using a Hilbert transform. Each B-scan's position and orientation was recorded using a Northern Digital Polaris optical tracking system (http://www.ndigital.com), with spatial and temporal calibration performed according to the techniques in [15]. The scanning subject was a joint of beef.…”

Accuracy of unidimensional and volumetric ultrasound measurements in predicting good pathological response to neoadjuvant chemotherapy in breast cancer patients

“…software was also used to analyze and display the 3D data and has been described in detail elsewhere [16,17]. All 3D US data acquisition was performed by 1 of 2 experienced Consultant radiologists.…”

“…The 3D US dataset was reviewed at the personal computer, the tumour was manually segmented and a series of outlines representing the tumour was produced. Volume measurements were produced from the target outlines for each dataset using the Stradwin software [16,17].…”