Title :
Ultrasound mammograph for breast lobe inspection
Author :
Mensah, S. ; Rouyer, J. ; Lasaygues, P. ; Franceschini, E.
Author_Institution :
Mech. & Acoust. Lab., Marseille, France
Abstract :
Ultrasound Tomography (UT) has proved effective for soft-tissue (breast, liver, testicles...) characterization; it reduces also the operator-dependency observed in echography. A half-ring transducer array was designed based on the breast anatomy, to obtain reflectivity images of the ductolobular structures using tomographic reconstruction procedures. These procedures are suited to broadband data acquired in scattering configurations while the heterogeneous objects (Born approximation) are probed by spherical waves. Dedicated “elliptical” Fourier transform pair has been derived to solve the near-field inverse problem. Ultrasounds signal are acquired using a 3-MHz transducer array which comprises 1024 elements set, in a 190-degree circular arc with a radius of 100 mm. Arbitrary waveforms are synthesized to improve the signal-to-noise ratio (pulse compression) and to increase the spatial resolution when working with low contrast objects. Tomographic acquisitions were performed with low contrast 2-D breast phantoms in order to compare the detection power of the mammograph with standard ultrasound images.
Keywords :
Fourier transforms; acoustic tomography; biological tissues; biomedical ultrasonics; data acquisition; image coding; image reconstruction; image resolution; inverse problems; liver; mammography; medical image processing; phantoms; reflectivity; ultrasonic imaging; ultrasonic transducer arrays; Born approximation; arbitrary waveforms; breast anatomy; breast lobe inspection; broadband data acquisition; dedicated elliptical Fourier transform pair; ductolobular structures; echography; frequency 3 MHz; half-ring transducer array; heterogeneous objects; liver; low contrast 2-D breast phantoms; near-field inverse problem; operator dependency; pulse compression; reflectivity images; scattering configurations; signal-to-noise ratio; size 100 mm; soft tissue characterization; spatial resolution; testicles; tomographic reconstruction procedures; ultrasound mammography; ultrasound tomography; ultrasounds signal acquisition; Acoustics; Arrays; Breast; Phantoms; Tomography; Transducers; Ultrasonic imaging; Breast cancer; Ultrasound computed tomography; ultrasound mammograph;
Conference_Titel :
Ultrasonics Symposium (IUS), 2011 IEEE International
Conference_Location :
Orlando, FL
Print_ISBN :
978-1-4577-1253-1
DOI :
10.1109/ULTSYM.2011.0346