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Keywords:
Extremities, Kidney, Thyroid / Parathyroids, Ultrasound, Diagnostic procedure, Image registration
Authors:
L. Solbiati1, S. Castor2, S. de Beni3, S. D'Onofrio3, L. Forzoni4; 1Busto Arsizio/IT, 2Syracuse NY/US, 3Genova/IT, 4Firenze/IT
DOI:
10.1594/ecr2016/C-1839
Results
The real-time US navigation on the reference image was always possible in all the tested applications.
It was always possible to use the 2D Navigation BodyMap Technology,
with a good correspondence between the probe represented and the real probe visible on real-time US.
Different US imaging and Doppler modalities were used when in BodyMap 2D Navigation: B-Mode,
Color Doppler,
Power Doppler and Elastosonography.
The registration phase was performed selecting some easy to be recognized natural markers on the reference image and on the patient’s body.
Six marker points on average were used in order to perform the registration between the real-time US and the reference image for 2D navigation.
The reference point identification and selection were done directly with the US probe,
using the center of the array as pointer (both for convex and linear transducers).
On average,
the mismatch between the probe position and reference internal markers during in vivo,
ex vivo and in vitro tests were 7±5 mm.
Excessive compression with the US probe was avoided,
since it may cause major (up to 12 mm) deformations; generally,
the tool demonstrated to be qualitatively acceptable and in line with everyday clinical practice.
The use of a proper amount of gel,
in order to ensure the correct coupling between the transducer and the patient’s body skin,
was useful in order to avoid excessive compressions caused by the transducer.
The registration time between US and any reference 2D image tested was 50 seconds on average.