Photoacoustics最新文献_第9页

X-ray free-electron laser induced acoustic microscopy (XFELAM) X 射线自由电子激光诱导声学显微镜（XFELAM）

IF 7.9 1区医学

Photoacoustics Pub Date : 2024-01-13 DOI: 10.1016/j.pacs.2024.100587

Seongwook Choi , Sinyoung Park , Jiwoong Kim , Hyunhee Kim , Seonghee Cho , Sunam Kim , Jaeku Park , Chulhong Kim

{"title":"X-ray free-electron laser induced acoustic microscopy (XFELAM)","authors":"Seongwook Choi , Sinyoung Park , Jiwoong Kim , Hyunhee Kim , Seonghee Cho , Sunam Kim , Jaeku Park , Chulhong Kim","doi":"10.1016/j.pacs.2024.100587","DOIUrl":"https://doi.org/10.1016/j.pacs.2024.100587","url":null,"abstract":"<div><p>The X-ray free-electron laser (XFEL) has remarkably advanced X-ray imaging technology and enabled important scientific achievements. The XFEL’s extremely high power, short pulse width, low emittance, and high coherence make possible such diverse imaging techniques as absorption/emission spectroscopy, diffraction imaging, and scattering imaging. Here, we demonstrate a novel XFEL-based imaging modality that uses the X-ray induced acoustic (XA) effect, which we call X-ray free-electron laser induced acoustic microscopy (XFELAM). Initially, we verified the XA effect by detecting XA signals from various materials, then we validated the experimental results with simulation outcomes. Next, in resolution experiments, we successfully imaged a patterned tungsten target with drilled various-sized circles at a spatial resolution of 7.8 ± 5.1 µm, which is the first micron-scale resolution achieved by XA imaging. Our results suggest that the novel XFELAM can expand the usability of XFEL in various areas of fundamental scientific research.</p></div>","PeriodicalId":56025,"journal":{"name":"Photoacoustics","volume":"35 ","pages":"Article 100587"},"PeriodicalIF":7.9,"publicationDate":"2024-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2213597924000041/pdfft?md5=405ded7ccb818b4be99090426101cb5c&pid=1-s2.0-S2213597924000041-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139473603","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High sensitivity and ultra-low concentration range photoacoustic spectroscopy based on trapezoid compound ellipsoid resonant photoacoustic cell and partial least square 基于梯形复合椭球谐振光声单元和偏最小二乘法的高灵敏度和超低浓度范围光声光谱技术

IF 7.9 1区医学

Photoacoustics Pub Date : 2023-12-30 DOI: 10.1016/j.pacs.2023.100583

Qiaoyun Wang , Shunyuan Xu , Ziheng Zhu , Jilong Wang , Xin Zou , Chu Zhang , Qiang Liu

{"title":"High sensitivity and ultra-low concentration range photoacoustic spectroscopy based on trapezoid compound ellipsoid resonant photoacoustic cell and partial least square","authors":"Qiaoyun Wang , Shunyuan Xu , Ziheng Zhu , Jilong Wang , Xin Zou , Chu Zhang , Qiang Liu","doi":"10.1016/j.pacs.2023.100583","DOIUrl":"https://doi.org/10.1016/j.pacs.2023.100583","url":null,"abstract":"<div><p>A high sensitivity and ultra-low concentration range photoacoustic spectroscopy (PAS) gas detection system, which was based on a novel trapezoid compound ellipsoid resonant photoacoustic cell (TCER-PAC) and partial least square (PLS), was proposed to detect acetylene (C<sub>2</sub>H<sub>2</sub>) gas. In the concentration range of 0.5 ppm ∼ 10.0 ppm, the limit of detection (LOD) values of TCER-PAC-based PAS system without data processing was 66.4 ppb, which was lower than that of the traditional trapezoid compound cylindrical resonant photoacoustic cell (TCCR-PAC). The experimental results indicated that the TCER-PAC had higher sensitivity than of TCCR-PAC. Within the concentration range of 12.5 ppb ∼ 125.0 ppb, the LOD and limit of quantification (LOQ) of TCER-PAC-based PAS system combined with PLS regression algorithm were 1.1 ppb and 3.7 ppb, respectively. The results showed that higher detection sensitivity and lower LOD were obtained by PAS system with TCER-PAC and PLS than that of TCCR-PAC-based PAS system.</p></div>","PeriodicalId":56025,"journal":{"name":"Photoacoustics","volume":"35 ","pages":"Article 100583"},"PeriodicalIF":7.9,"publicationDate":"2023-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2213597923001362/pdfft?md5=43741e7d877ecd3cb000992aa09cafd8&pid=1-s2.0-S2213597923001362-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139100915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Special issue introduction: Ultrafast photoacoustics 特刊简介：超快光声学

IF 7.9 1区医学

Photoacoustics Pub Date : 2023-12-23 DOI: 10.1016/j.pacs.2023.100581

Vitalyi E. Gusev, Bertrand Audoin, Oliver B. Wright

引用次数: 0

Quality control in clinical raster-scan optoacoustic mesoscopy 临床光栅扫描光声介孔镜的质量控制

IF 7.9 1区医学

Photoacoustics Pub Date : 2023-12-22 DOI: 10.1016/j.pacs.2023.100582

Hailong He , Chiara Fischer , Ulf Darsow , Juan Aguirre , Vasilis Ntziachristos

{"title":"Quality control in clinical raster-scan optoacoustic mesoscopy","authors":"Hailong He , Chiara Fischer , Ulf Darsow , Juan Aguirre , Vasilis Ntziachristos","doi":"10.1016/j.pacs.2023.100582","DOIUrl":"10.1016/j.pacs.2023.100582","url":null,"abstract":"<div><p>Optoacoustic (photoacoustic) mesoscopy bridges the gap between optoacoustic microscopy and macroscopy and enables high-resolution visualization deeper than optical microscopy. Nevertheless, as images may be affected by motion and noise, it is critical to develop methodologies that offer standardization and quality control to ensure that high-quality datasets are reproducibly obtained from patient scans. Such development is particularly important for ensuring reliability in applying machine learning methods or for reliably measuring disease biomarkers. We propose herein a quality control scheme to assess the quality of data collected. A reference scan of a suture phantom is performed to characterize the system noise level before each raster-scan optoacoustic mesoscopy (RSOM) measurement. Using the recorded RSOM data, we develop a method that estimates the amount of motion in the raw data. These motion metrics are employed to classify the quality of raw data collected and derive a quality assessment index (<em>QASIN</em>) for each raw measurement. Using simulations, we propose a selection criterion of images with sufficient <em>QASIN</em>, leading to the compilation of RSOM datasets with consistent quality. Using 160 RSOM measurements from healthy volunteers, we show that RSOM images that were selected using <em>QASIN</em> were of higher quality and fidelity compared to non-selected images. We discuss how this quality control scheme can enable the standardization of RSOM images for clinical and biomedical applications.</p></div>","PeriodicalId":56025,"journal":{"name":"Photoacoustics","volume":"35 ","pages":"Article 100582"},"PeriodicalIF":7.9,"publicationDate":"2023-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2213597923001350/pdfft?md5=3d0461ac9038ca62fa4e4fe878c6c76a&pid=1-s2.0-S2213597923001350-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138988944","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An umbrella-inspired snap-on robotic 3D photoacoustic endoscopic probe for augmented intragastric sensing: Proof of concept study 用于增强胃内传感的伞式三维光声机器人内窥镜探头：概念验证研究

IF 7.9 1区医学

Photoacoustics Pub Date : 2023-12-08 DOI: 10.1016/j.pacs.2023.100568

Li Liu , Ang Li , Yisong Zhao , Luyao Zhu , Yongjian Zhao , Fei Gao

{"title":"An umbrella-inspired snap-on robotic 3D photoacoustic endoscopic probe for augmented intragastric sensing: Proof of concept study","authors":"Li Liu , Ang Li , Yisong Zhao , Luyao Zhu , Yongjian Zhao , Fei Gao","doi":"10.1016/j.pacs.2023.100568","DOIUrl":"10.1016/j.pacs.2023.100568","url":null,"abstract":"<div><p>In this paper, we present a novel on-demand modular robotic photoacoustic tomography (PAT) probe integrated into an endoscopic device, potentially for deep intragastric sensing. The proposed solution offers a plug-and-play approach through the use of meso-scale steerable endoscopy and a new ‘snap-on’ 3D robotic PAT probe that can reconfigure the geometry of the intracorporeal light delivery, inspired by an umbrella structure. Specifically, using the limited esophageal access, steerable endoscopy allows navigation and advancement of a distally mounted robotic add-on for PAT that is folded until it reaches the deep-seated gastric lesion. Once the tip is positioned near the lesion site in the gastric cavity, there is ample working space for the robotic probe to adjust its umbrella-like unfolded shape. This allows fine-tuning of the laser delivery orientation of the fiber bundles to achieve the lesion-specific light delivery scheme. This design allows volumetric imaging of the intragastric PAT with enhanced sensitivity. To evaluate the performance of the modular robotic PAT probe, we performed a simulation analysis of the light intensity and ultrasound field distribution. The simulation results show that the robotic probe is feasible for intracorporeal PAT imaging. In addition, we printed a 3D model of a human stomach containing a simulated gastric tumour. Both the phantom and ex vivo experimental results validate the feasibility of the proposed robotic PAT probe.</p></div>","PeriodicalId":56025,"journal":{"name":"Photoacoustics","volume":"35 ","pages":"Article 100568"},"PeriodicalIF":7.9,"publicationDate":"2023-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2213597923001210/pdfft?md5=7a6c3741cd036a1e61a8c472dc8a2dd4&pid=1-s2.0-S2213597923001210-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138627545","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Folded-optics-based quartz-enhanced photoacoustic and photothermal hybrid spectroscopy 基于折叠光学的石英增强光声光热混合光谱学

IF 7.9 1区医学

Photoacoustics Pub Date : 2023-12-07 DOI: 10.1016/j.pacs.2023.100580

Ruyue Cui , Hongpeng Wu , Frank K. Tittel, Vincenzo Spagnolo, Weidong Chen, Lei Dong

{"title":"Folded-optics-based quartz-enhanced photoacoustic and photothermal hybrid spectroscopy","authors":"Ruyue Cui , Hongpeng Wu , Frank K. Tittel, Vincenzo Spagnolo, Weidong Chen, Lei Dong","doi":"10.1016/j.pacs.2023.100580","DOIUrl":"10.1016/j.pacs.2023.100580","url":null,"abstract":"<div><p>Folded-optics-based quartz-enhanced photoacoustic and photothermal hybrid spectroscopy (FO-QEPA-PTS) is reported for the first time. In FO-QEPA-PTS, the detection of the photoacoustic and photothermal hybrid signal is achieved through the use of a custom quartz tuning fork (QTF), thereby mitigating the issue of resonant frequency mismatch typically encountered in quartz-enhanced photoacoustic-photothermal spectroscopy employing multiple QTFs. A multi-laser beam, created by a multi-pass cell (MPC) with a designed single-line spot pattern, partially strikes the inner edge of the QTF and partially passes through the prong of the QTF, thereby generating photoacoustic and photothermal hybrid signals. To assess the performance of FO-QEPA-PTS, 1 % acetylene is selected as the analyte gas and the 2<em>f</em> signals produced by the photoacoustic, the photothermal, and their hybrid effects are measured. Comparative analysis against QEPAS and QEPTS reveals signal gain factors of ∼ 79 and ∼ 14, respectively, when these laser beams created by MPC excite the QTF operating at fundamental resonance mode in phase. In the FO-QEPA-PTS signal, the proportions of the photoacoustic and the photothermal effects induced by the multiple beams are ∼7 % and 93 %, respectively.</p></div>","PeriodicalId":56025,"journal":{"name":"Photoacoustics","volume":"35 ","pages":"Article 100580"},"PeriodicalIF":7.9,"publicationDate":"2023-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2213597923001337/pdfft?md5=3480d2cbe0d09e68762d781c222c3d8c&pid=1-s2.0-S2213597923001337-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138530236","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hybrid ultrasound and single wavelength optoacoustic imaging reveals muscle degeneration in peripheral artery disease 混合超声和单波长光声成像显示外周动脉疾病的肌肉变性

IF 7.9 1区医学

Photoacoustics Pub Date : 2023-12-02 DOI: 10.1016/j.pacs.2023.100579

Anna P. Träger , Josefine S. Günther , Roman Raming , Lars-Philip Paulus , Werner Lang , Alexander Meyer , Julius Kempf , Milenko Caranovic , Yi Li , Alexandra L. Wagner , Lina Tan , Vera Danko , Regina Trollmann , Joachim Woelfle , Daniel Klett , Markus F. Neurath , Adrian P. Regensburger , Markus Eckstein , Wolfgang Uter , Michael Uder , Ulrich Rother

{"title":"Hybrid ultrasound and single wavelength optoacoustic imaging reveals muscle degeneration in peripheral artery disease","authors":"Anna P. Träger , Josefine S. Günther , Roman Raming , Lars-Philip Paulus , Werner Lang , Alexander Meyer , Julius Kempf , Milenko Caranovic , Yi Li , Alexandra L. Wagner , Lina Tan , Vera Danko , Regina Trollmann , Joachim Woelfle , Daniel Klett , Markus F. Neurath , Adrian P. Regensburger , Markus Eckstein , Wolfgang Uter , Michael Uder , Ulrich Rother","doi":"10.1016/j.pacs.2023.100579","DOIUrl":"10.1016/j.pacs.2023.100579","url":null,"abstract":"<div><p>Peripheral arterial disease (PAD) leads to chronic vascular occlusion and results in end organ damage in critically perfused limbs. There are currently no clinical methods available to determine the muscular damage induced by chronic mal-perfusion. This monocentric prospective cross-sectional study investigated n = 193 adults, healthy to severe PAD, in order to quantify the degree of calf muscle degeneration caused by PAD using a non-invasive hybrid ultrasound and single wavelength optoacoustic imaging (US/SWL-OAI) approach. While US provides morphologic information, SWL-OAI visualizes the absorption of pulsed laser light and the resulting sound waves from molecules undergoing thermoelastic expansion. US/SWL-OAI was compared to multispectral data, clinical disease severity, angiographic findings, phantom experiments, and histological examinations from calf muscle biopsies. We were able to show that synergistic use of US/SWL-OAI is most likely to map clinical degeneration of the muscle and progressive PAD.</p></div>","PeriodicalId":56025,"journal":{"name":"Photoacoustics","volume":"35 ","pages":"Article 100579"},"PeriodicalIF":7.9,"publicationDate":"2023-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2213597923001325/pdfft?md5=89d4d4504f250b3242911ba2be936a18&pid=1-s2.0-S2213597923001325-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138530232","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ultrasound-guided needle tracking with deep learning: A novel approach with photoacoustic ground truth 超声引导针跟踪与深度学习:光声地面真实的新方法

IF 7.9 1区医学

Photoacoustics Pub Date : 2023-12-01 DOI: 10.1016/j.pacs.2023.100575

Xie Hui , Praveenbalaji Rajendran , Tong Ling , Xianjin Dai , Lei Xing , Manojit Pramanik

{"title":"Ultrasound-guided needle tracking with deep learning: A novel approach with photoacoustic ground truth","authors":"Xie Hui , Praveenbalaji Rajendran , Tong Ling , Xianjin Dai , Lei Xing , Manojit Pramanik","doi":"10.1016/j.pacs.2023.100575","DOIUrl":"https://doi.org/10.1016/j.pacs.2023.100575","url":null,"abstract":"<div><p>Accurate needle guidance is crucial for safe and effective clinical diagnosis and treatment procedures. Conventional ultrasound (US)-guided needle insertion often encounters challenges in consistency and precisely visualizing the needle, necessitating the development of reliable methods to track the needle. As a powerful tool in image processing, deep learning has shown promise for enhancing needle visibility in US images, although its dependence on manual annotation or simulated data as ground truth can lead to potential bias or difficulties in generalizing to real US images. Photoacoustic (PA) imaging has demonstrated its capability for high-contrast needle visualization. In this study, we explore the potential of PA imaging as a reliable ground truth for deep learning network training without the need for expert annotation. Our network (UIU-Net), trained on ex vivo tissue image datasets, has shown remarkable precision in localizing needles within US images. The evaluation of needle segmentation performance extends across previously unseen ex vivo data and in vivo human data (collected from an open-source data repository). Specifically, for human data, the Modified Hausdorff Distance (MHD) value stands at approximately 3.73, and the targeting error value is around 2.03, indicating the strong similarity and small needle orientation deviation between the predicted needle and actual needle location. A key advantage of our method is its applicability beyond US images captured from specific imaging systems, extending to images from other US imaging systems.</p></div>","PeriodicalId":56025,"journal":{"name":"Photoacoustics","volume":"34 ","pages":"Article 100575"},"PeriodicalIF":7.9,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2213597923001283/pdfft?md5=49145242ce4680c835618e890fdc6bf5&pid=1-s2.0-S2213597923001283-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138474674","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Multispectral optoacoustic tomography enables assessment of disease activity in paediatric inflammatory bowel disease 多光谱光声断层扫描能够评估儿童炎症性肠病的疾病活动性

IF 7.9 1区医学

Photoacoustics Pub Date : 2023-12-01 DOI: 10.1016/j.pacs.2023.100578

Adrian P. Regensburger , Markus Eckstein , Matthias Wetzl , Roman Raming , Lars-Philip Paulus , Adrian Buehler , Emmanuel Nedoschill , Vera Danko , Jörg Jüngert , Alexandra L. Wagner , Alexander Schnell , Aline Rückel , Ulrich Rother , Oliver Rompel , Michael Uder , Arndt Hartmann , Markus F. Neurath , Joachim Woelfle , Maximilian J. Waldner , André Hoerning , Ferdinand Knieling

{"title":"Multispectral optoacoustic tomography enables assessment of disease activity in paediatric inflammatory bowel disease","authors":"Adrian P. Regensburger , Markus Eckstein , Matthias Wetzl , Roman Raming , Lars-Philip Paulus , Adrian Buehler , Emmanuel Nedoschill , Vera Danko , Jörg Jüngert , Alexandra L. Wagner , Alexander Schnell , Aline Rückel , Ulrich Rother , Oliver Rompel , Michael Uder , Arndt Hartmann , Markus F. Neurath , Joachim Woelfle , Maximilian J. Waldner , André Hoerning , Ferdinand Knieling","doi":"10.1016/j.pacs.2023.100578","DOIUrl":"https://doi.org/10.1016/j.pacs.2023.100578","url":null,"abstract":"<div><p>Multispectral optoacoustic tomography (MSOT) allows non-invasive molecular disease activity assessment in adults with inflammatory bowel disease (IBD). In this prospective pilot-study, we investigated, whether increased levels of MSOT haemoglobin parameters corresponded to inflammatory activity in paediatric IBD patients, too. 23 children with suspected IBD underwent MSOT of the terminal ileum and sigmoid colon with standard validation (e.g. endoscopy). In Crohn`s disease (CD) and ulcerative colitis (UC) patients with endoscopically confirmed disease activity, MSOT total haemoglobin (HbT) signals were increased in the terminal ileum of CD (72.1 ± 13.0 a.u. vs. 32.9 ± 15.4 a.u., p = 0.0049) and in the sigmoid colon of UC patients (62.9 ± 13.8 a.u. vs. 35.1 ± 16.3 a.u., p = 0.0311) as compared to controls, respectively. Furthermore, MSOT haemoglobin parameters correlated well with standard disease activity assessment (e.g. SES-CD and MSOT HbT (r<sub>s</sub> =0.69, p = 0.0075). Summarizing, MSOT is a novel technology for non-invasive molecular disease activity assessment in paediatric patients with inflammatory bowel disease.</p></div>","PeriodicalId":56025,"journal":{"name":"Photoacoustics","volume":"35 ","pages":"Article 100578"},"PeriodicalIF":7.9,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2213597923001313/pdfft?md5=91ffc14ad1379153de698c2147e02b2f&pid=1-s2.0-S2213597923001313-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138483938","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Spatial resolution and reconstructed size accuracy using advanced beamformers in linear array-based PAT systems 在基于线性阵列的PAT系统中使用先进波束形成器的空间分辨率和重建尺寸精度

IF 7.9 1区医学

Photoacoustics Pub Date : 2023-12-01 DOI: 10.1016/j.pacs.2023.100576

Irene Pi-Martín, Alejandro Cebrecos, Juan J. García-Garrigós, Noé Jiménez, Francisco Camarena

{"title":"Spatial resolution and reconstructed size accuracy using advanced beamformers in linear array-based PAT systems","authors":"Irene Pi-Martín, Alejandro Cebrecos, Juan J. García-Garrigós, Noé Jiménez, Francisco Camarena","doi":"10.1016/j.pacs.2023.100576","DOIUrl":"https://doi.org/10.1016/j.pacs.2023.100576","url":null,"abstract":"<div><p>Limitations associated with linear-array probes in photoacoustic tomography are partially compensated by using advanced beamformers that exploit the temporal and spatial coherence of the recorded signals, such as Delay Multiply and Sum (DMAS), Minimum Variance (MV) or coherence factor (CF), among others. However, their associated signal processing leads to an overestimation of the spatial resolution, as well as alterations in the reconstructed object size. Numerical and experimental results reported here support this hypothesis. First, we show that the Rayleigh criterion (RC) is the most suitable choice to characterize the spatial resolution instead of the Point Spread Function (PSF) when considering advanced beamformers. Then, we observe that several advanced beamformers fail to properly reconstruct target sizes slightly above the spatial resolution, underestimating their size. This work sheds light on the suitability of this type of beamformers combined with linear probes for determining sizes and morphology in photoacoustic images.</p></div>","PeriodicalId":56025,"journal":{"name":"Photoacoustics","volume":"34 ","pages":"Article 100576"},"PeriodicalIF":7.9,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2213597923001295/pdfft?md5=f14097c3750e30ff7352440cce0ea0c2&pid=1-s2.0-S2213597923001295-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138484850","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0