Design, Implementation, and Medical Applications of 2-D Ultrasound Sparse Arrays.
IEEE Trans Ultrason Ferroelectr Freq Control
; 69(10): 2739-2755, 2022 10.
Article
em En
| MEDLINE
| ID: mdl-35333714
ABSTRACT
An ultrasound sparse array consists of a sparse distribution of elements over a 2-D aperture. Such an array is typically characterized by a limited number of elements, which in most cases is compatible with the channel number of the available scanners. Sparse arrays represent an attractive alternative to full 2-D arrays that may require the control of thousands of elements through expensive application-specific integrated circuits (ASICs). However, their massive use is hindered by two main drawbacks the possible beam profile deterioration, which may worsen the image contrast, and the limited signal-to-noise ratio (SNR), which may result too low for some applications. This article reviews the work done for three decades on 2-D ultrasound sparse arrays for medical applications. First, random, optimized, and deterministic design methods are reviewed together with their main influencing factors. Then, experimental 2-D sparse array implementations based on piezoelectric and capacitive micromachined ultrasonic transducer (CMUT) technologies are presented. Sample applications to 3-D (Doppler) imaging, super-resolution imaging, photo-acoustic imaging, and therapy are reported. The final sections discuss the main shortcomings associated with the use of sparse arrays, the related countermeasures, and the next steps envisaged in the development of innovative arrays.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Transdutores
/
Ultrassom
Tipo de estudo:
Diagnostic_studies
Idioma:
En
Revista:
IEEE Trans Ultrason Ferroelectr Freq Control
Ano de publicação:
2022
Tipo de documento:
Article