Objective: The purpose of this paper is to present a more convenient and practical alternate way of increasing the lateral discrete array sampling while using a typical λ pitch linear array transducer at receive for photoacoustic tomography (PAT) application.
Methods: We have employed a linear translation-based approach, in which the array transducer is translated by sub-pitch amount to create an augmented RF frame data having denser lateral spatial sampling. The denser λ/2 and λ/4 pitch data were reconstructed and compared against conventional λ pitch reconstructed PAT image using simulation and tissue mimicking phantom experiments in terms of improvements in resolution and contrast.
Results: The results from experiments demonstrate a 34.48% improvement in lateral resolution (LR), measured in terms of full-width at half-maximum of the lateral profile of point spread function, and a maximum of 7-dB improvement in contrast is achieved while using a λ/2-pitch configuration when compared to the conventional λ-pitch configuration.
Conclusion: It was demonstrated that λ/2- and λ/4-pitch configurations result in better LR and contrast than λ-pitch configuration.
Significance: Based on the results obtained, the proposed method has the potential to serve as an easy-to-integrate and simple way of achieving better image quality without requiring to increase the system complexity with existing transducer array probe technology in regular clinical scanners.
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http://dx.doi.org/10.1109/TBME.2019.2907559 | DOI Listing |
Clin Exp Optom
January 2025
Department of Optometry, School of Paramedical and Rehabilitation Sciences, Mashhad University of Medical Sciences, Mashhad, Iran.
Clinical Relevance: The vestibular-ocular reflex stabilises the retinal image and maintains balance during head movement. Astigmatism is one of the common refractive errors that can reduce the quality of visual inputs.
Background: The purpose of this study was to investigate the effect of induced astigmatism on the function of the vestibular-ocular reflex.
Extracell Vesicles Circ Nucl Acids
December 2024
Department of Otorhinolaryngology, Head and Neck Surgery, The Chinese University of Hong Kong, Hong Kong Special Administrative Region, Hong Kong 00000, China.
Current approaches to oral cancer diagnosis primarily involve physical examination, tissue biopsy, and advanced computer-aided imaging techniques. However, despite these advances, patient survival rates have not significantly improved. Hence, there is a critical need to develop minimally invasive tools with high sensitivity and specificity to improve patient survival and quality of life.
View Article and Find Full Text PDFMethodsX
June 2025
Department of Computer Science and Engineering, Vel Tech Rangarajan Dr.Sagunthala R&D Institute of Science and Technology, Tamil Nadu 600062, India.
The disease affects the optic nerve and represents the principle reasons of irreversible vision loss, mostly asymptomatic and uncontrolled. Consequently, early and accurate diagnosis is critical to prevent or reduce its effect, however, conventional diagnostic techniques often fail to provide concrete results. In this regard, we present a new approach built on Generative Adversarial Networks (GAN) and MobileNetV2 pretrained architecture for diagnosing glaucoma.
View Article and Find Full Text PDFJ Microsc Ultrastruct
January 2023
Department of Oral and Maxillofacial Pathology and Microbiology, D.Y. Patil University, School of Dentistry, Nerul, Navi Mumbai, Maharashtra, India.
Background: Oral lesions of the jaw has been well explained in the literature through high-quality 2D clinical, radiographic, and histopathological images. But the clinicians and most of the times students too, don't understand the histopathological aspect through the description of text and existing 2D images. This article is preliminary attempt to explain the key events of histopathological aspects of odontoma in third dimension and clay models in a life-like manner which author herself has designed, for better understanding not only by oral and general pathologists, and students but also by patients, which is the unique feature of this short manuscript.
View Article and Find Full Text PDFJPRAS Open
March 2025
Department of Radiation Oncology, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan.
Background: Breast cancer patients experience acute radiation dermatitis (ARD) during radiation therapy (RT). This study investigated the prophylactic effect of a newly developed xenogeneic platelet-rich plasma (PRP) lotion on ARD for breast cancer patients.
Methods: This study enrolled patients with ductal carcinoma in situ and early-stage invasive breast cancers after breast-conserving surgery.
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