Achieving depth-independent lateral resolution in AR-PAM using the synthetic-aperture focusing technique

Gao，Rongkang1; Xue，Qiang1,2,3; Ren，Yaguang1; Zhang，Hai3,4; Song，Liang1; Liu，Chengbo1

2022-06-01

10.1016/j.pacs.2021.100328

Photoacoustics   影响因子和分区

2213-5979

Acoustic-resolution photoacoustic microscopy (AR-PAM) is a promising imaging modality that renders images with ultrasound resolution and extends the imaging depth beyond the optical ballistic regime. To achieve a high lateral resolution, a large numerical aperture (NA) of a focused transducer is usually applied for AR-PAM. However, AR-PAM fails to hold its performance in the out-of-focus region. The lateral resolution and signal-to-noise ratio (SNR) degrade substantially, thereby leading to a significantly deteriorated image quality outside the focal area. Based on the concept of the synthetic-aperture focusing technique (SAFT), various strategies have been developed to address this challenge. These include 1D-SAFT, 2D-SAFT, adaptive-SAFT, spatial impulse response (SIR)-based schemes, and delay-multiply-and-sum (DMAS) strategies. These techniques have shown progress in achieving depth-independent lateral resolution, while several challenges remain. This review aims to introduce these developments in SAFT-based approaches, highlight their fundamental mechanisms, underline the advantages and limitations of each approach, and discuss the outlook of the remaining challenges for future advances.

AR-PAM Artifacts Coherent factor DAS DMAS Lateral resolution SAFT Side lobes SNR

EI

英语

其他

20221111783079

Impulse response ; Photoacoustic microscopy ; Synthetic apertures ; Ultrasonic applications

Information Theory and Signal Processing:716.1 ; Radar Systems and Equipment:716.2 ; Imaging Techniques:746 ; Ultrasonic Applications:753.3

2-s2.0-85126008482

Scopus

1.Research Laboratory for Biomedical Optics and Molecular Imaging,CAS Key Laboratory of Health Informatics,Shenzhen Institute of Advanced Technology,Chinese Academy of Sciences,Shenzhen,518055,China
2.School of Medicine,Southern University of Science and Technology,Shenzhen,518055,China
3.Department of Ultrasound,First Affiliated Hospital of Southern University of Science and Technology,The Shenzhen Medical Ultrasound Engineering Center,Shenzhen People's Hospital,Shenzhen,518020,China
4.Department of Ultrasound,The Second Clinical College of Jinan University,Shenzhen People's Hospital,Shenzhen,518020,China

Gao，Rongkang,Xue，Qiang,Ren，Yaguang,et al. Achieving depth-independent lateral resolution in AR-PAM using the synthetic-aperture focusing technique[J]. Photoacoustics,2022,26.

Gao，Rongkang,Xue，Qiang,Ren，Yaguang,Zhang，Hai,Song，Liang,&Liu，Chengbo.(2022).Achieving depth-independent lateral resolution in AR-PAM using the synthetic-aperture focusing technique.Photoacoustics,26.

Gao，Rongkang,et al."Achieving depth-independent lateral resolution in AR-PAM using the synthetic-aperture focusing technique".Photoacoustics 26(2022).