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Ruiz-Santaquiteria J, Muñoz JD, Maigler FJ, Deniz O, Bueno G. Firearm-related action recognition and object detection dataset for video surveillance systems. Data Brief 2024; 52:110030. [PMID: 38299104 PMCID: PMC10827673 DOI: 10.1016/j.dib.2024.110030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 12/22/2023] [Accepted: 01/02/2024] [Indexed: 02/02/2024] Open
Abstract
The proposed dataset is comprised of 398 videos, each featuring an individual engaged in specific video surveillance actions. The ground truth for this dataset was expertly curated and is presented in JSON format (standard COCO), offering vital information about the dataset, video frames, and annotations, including precise bounding boxes outlining detected objects. The dataset encompasses three distinct categories for object detection: "Handgun", "Machine_Gun", and "No_Gun", dependent on the video's content. This dataset serves as a resource for research in firearm-related action recognition, firearm detection, security, and surveillance applications, enabling researchers and practitioners to develop and evaluate machine learning models for the detection of handguns and rifles across various scenarios. The meticulous ground truth annotations facilitate precise model evaluation and performance analysis, making this dataset an asset in the field of computer vision and public safety.
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Affiliation(s)
- Jesus Ruiz-Santaquiteria
- VISILAB, E.T.S. Ingeniería Industrial, University of Castilla-La Mancha, Avda. Camilo José Cela, Ciudad Real, Spain
| | - Juan D. Muñoz
- VISILAB, E.T.S. Ingeniería Industrial, University of Castilla-La Mancha, Avda. Camilo José Cela, Ciudad Real, Spain
| | - Francisco J. Maigler
- VISILAB, E.T.S. Ingeniería Industrial, University of Castilla-La Mancha, Avda. Camilo José Cela, Ciudad Real, Spain
| | - Oscar Deniz
- VISILAB, E.T.S. Ingeniería Industrial, University of Castilla-La Mancha, Avda. Camilo José Cela, Ciudad Real, Spain
| | - Gloria Bueno
- VISILAB, E.T.S. Ingeniería Industrial, University of Castilla-La Mancha, Avda. Camilo José Cela, Ciudad Real, Spain
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Salido J, Vallez N, González-López L, Deniz O, Bueno G. Comparison of deep learning models for digital H&E staining from unpaired label-free multispectral microscopy images. Comput Methods Programs Biomed 2023; 235:107528. [PMID: 37040684 DOI: 10.1016/j.cmpb.2023.107528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Revised: 03/27/2023] [Accepted: 04/03/2023] [Indexed: 05/08/2023]
Abstract
BACKGROUND AND OBJECTIVE This paper presents the quantitative comparison of three generative models of digital staining, also known as virtual staining, in H&E modality (i.e., Hematoxylin and Eosin) that are applied to 5 types of breast tissue. Moreover, a qualitative evaluation of the results achieved with the best model was carried out. This process is based on images of samples without staining captured by a multispectral microscope with previous dimensional reduction to three channels in the RGB range. METHODS The models compared are based on conditional GAN (pix2pix) which uses images aligned with/without staining, and two models that do not require image alignment, Cycle GAN (cycleGAN) and contrastive learning-based model (CUT). These models are compared based on the structural similarity and chromatic discrepancy between samples with chemical staining and their corresponding ones with digital staining. The correspondence between images is achieved after the chemical staining images are subjected to digital unstaining by means of a model obtained to guarantee the cyclic consistency of the generative models. RESULTS The comparison of the three models corroborates the visual evaluation of the results showing the superiority of cycleGAN both for its larger structural similarity with respect to chemical staining (mean value of SSIM ∼ 0.95) and lower chromatic discrepancy (10%). To this end, quantization and calculation of EMD (Earth Mover's Distance) between clusters is used. In addition, quality evaluation through subjective psychophysical tests with three experts was carried out to evaluate quality of the results with the best model (cycleGAN). CONCLUSIONS The results can be satisfactorily evaluated by metrics that use as reference image a chemically stained sample and the digital staining images of the reference sample with prior digital unstaining. These metrics demonstrate that generative staining models that guarantee cyclic consistency provide the closest results to chemical H&E staining that also is consistent with the result of qualitative evaluation by experts.
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Affiliation(s)
- Jesus Salido
- IEEAC Dept. (ESI-UCLM), P de la Universidad 4, Ciudad Real, 13071, Spain.
| | - Noelia Vallez
- IEEAC Dept. (ETSII-UCLM), Avda. Camilo José Cela s/n, Ciudad Real, 13071, Spain
| | - Lucía González-López
- Hospital Gral. Universitario de C.Real (HGUCR), C. Obispo Rafael Torija s/n, Ciudad Real, 13005, Spain
| | - Oscar Deniz
- IEEAC Dept. (ETSII-UCLM), Avda. Camilo José Cela s/n, Ciudad Real, 13071, Spain
| | - Gloria Bueno
- IEEAC Dept. (ETSII-UCLM), Avda. Camilo José Cela s/n, Ciudad Real, 13071, Spain
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Vallez N, Bueno G, Deniz O, Blanco S. Diffeomorphic transforms for data augmentation of highly variable shape and texture objects. Comput Methods Programs Biomed 2022; 219:106775. [PMID: 35397412 DOI: 10.1016/j.cmpb.2022.106775] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Revised: 02/28/2022] [Accepted: 03/23/2022] [Indexed: 06/14/2023]
Abstract
BACKGROUND AND OBJECTIVE Training a deep convolutional neural network (CNN) for automatic image classification requires a large database with images of labeled samples. However, in some applications such as biology and medicine only a few experts can correctly categorize each sample. Experts are able to identify small changes in shape and texture which go unnoticed by untrained people, as well as distinguish between objects in the same class that present drastically different shapes and textures. This means that currently available databases are too small and not suitable to train deep learning models from scratch. To deal with this problem, data augmentation techniques are commonly used to increase the dataset size. However, typical data augmentation methods introduce artifacts or apply distortions to the original image, which instead of creating new realistic samples, obtain basic spatial variations of the original ones. METHODS We propose a novel data augmentation procedure which generates new realistic samples, by combining two samples that belong to the same class. Although the idea behind the method described in this paper is to mimic the variations that diatoms experience in different stages of their life cycle, it has also been demonstrated in glomeruli and pollen identification problems. This new data augmentation procedure is based on morphing and image registration methods that perform diffeomorphic transformations. RESULTS The proposed technique achieves an increase in accuracy over existing techniques of 0.47%, 1.47%, and 0.23% for diatom, glomeruli and pollen problems respectively. CONCLUSIONS For the Diatom dataset, the method is able to simulate the shape changes in different diatom life cycle stages, and thus, images generated resemble newly acquired samples with intermediate shapes. In fact, the other methods compared obtained worse results than those which were not using data augmentation. For the Glomeruli dataset, the method is able to add new samples with different shapes and degrees of sclerosis (through different textures). This is the case where our proposed DA method is more beneficial, when objects highly differ in both shape and texture. Finally, for the Pollen dataset, since there are only small variations between samples in a few classes and this dataset has other features such as noise which are likely to benefit other existing DA techniques, the method still shows an improvement of the results.
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Affiliation(s)
- Noelia Vallez
- VISILAB, University of Castilla-La Mancha, E.T.S. Ingenieria Industrial, Avda. Camilo Jose Cela s/n, Ciudad Real 13071, Spain.
| | - Gloria Bueno
- VISILAB, University of Castilla-La Mancha, E.T.S. Ingenieria Industrial, Avda. Camilo Jose Cela s/n, Ciudad Real 13071, Spain
| | - Oscar Deniz
- VISILAB, University of Castilla-La Mancha, E.T.S. Ingenieria Industrial, Avda. Camilo Jose Cela s/n, Ciudad Real 13071, Spain
| | - Saul Blanco
- Institute of the Environment, University of Leon, Leon E-24071, Spain
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Ozturk Y, Koca M, Unsal P, Dikmeer A, Burkuk S, Oytun M, Bas A, Kahyaoglu Z, Deniz O, Coteli S, Cankurtaran M, Dogu BB, Halil M. Cut-off values for the ultrasonographic assessment of muscle mass for the evaluation of sarcopenia in older adults. Clin Nutr ESPEN 2021. [DOI: 10.1016/j.clnesp.2021.09.142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Abstract
AbstractFast automatic handgun detection can be very useful to avoid or mitigate risks in public spaces. Detectors based on deep learning methods have been proposed in the literature to trigger an alarm if a handgun is detected in the image. However, those detectors are solely based on the weapon appearance on the image. In this work, we propose to combine the detector with the individual’s pose information in order to improve overall performance. To this end, a model that integrates grayscale images from the output of the handgun detector and heatmap-like images that represent pose is proposed. The results show an improvement over the original handgun detector. The proposed network provides a maximum improvement of a 17.5% in AP of the proposed combinational model over the baseline handgun detector.
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Salido J, Toledano PT, Vallez N, Deniz O, Ruiz-Santaquiteria J, Cristobal G, Bueno G. MicroHikari3D: an automated DIY digital microscopy platform with deep learning capabilities. Biomed Opt Express 2021; 12:7223-7243. [PMID: 34858711 PMCID: PMC8606155 DOI: 10.1364/boe.439014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Revised: 10/01/2021] [Accepted: 10/07/2021] [Indexed: 06/13/2023]
Abstract
A microscope is an essential tool in biosciences and production quality laboratories for unveiling the secrets of microworlds. This paper describes the development of MicroHikari3D, an affordable DIY optical microscopy platform with automated sample positioning, autofocus and several illumination modalities to provide a high-quality flexible microscopy tool for labs with a short budget. This proposed optical microscope design aims to achieve high customization capabilities to allow whole 2D slide imaging and observation of 3D live specimens. The MicroHikari3D motion control system is based on the entry level 3D printer kit Tronxy X1 controlled from a server running in a Raspberry Pi 4. The server provides services to a client mobile app for video/image acquisition, processing, and a high level classification task by applying deep learning models.
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Affiliation(s)
- J. Salido
- VISILAB Group, Universidad de Castilla-La Mancha, 13005 Ciudad Real, Spain
| | - P. T. Toledano
- VISILAB Group, Universidad de Castilla-La Mancha, 13005 Ciudad Real, Spain
| | - N. Vallez
- VISILAB Group, Universidad de Castilla-La Mancha, 13005 Ciudad Real, Spain
| | - O. Deniz
- VISILAB Group, Universidad de Castilla-La Mancha, 13005 Ciudad Real, Spain
| | | | - G. Cristobal
- Instituto de Optica (CSIC), Serrano 121, Madrid, Spain
| | - G. Bueno
- VISILAB Group, Universidad de Castilla-La Mancha, 13005 Ciudad Real, Spain
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Pedraza A, Deniz O, Bueno G. Really natural adversarial examples. INT J MACH LEARN CYB 2021. [DOI: 10.1007/s13042-021-01435-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
AbstractThe phenomenon of Adversarial Examples has become one of the most intriguing topics associated to deep learning. The so-called adversarial attacks have the ability to fool deep neural networks with inappreciable perturbations. While the effect is striking, it has been suggested that such carefully selected injected noise does not necessarily appear in real-world scenarios. In contrast to this, some authors have looked for ways to generate adversarial noise in physical scenarios (traffic signs, shirts, etc.), thus showing that attackers can indeed fool the networks. In this paper we go beyond that and show that adversarial examples also appear in the real-world without any attacker or maliciously selected noise involved. We show this by using images from tasks related to microscopy and also general object recognition with the well-known ImageNet dataset. A comparison between these natural and the artificially generated adversarial examples is performed using distance metrics and image quality metrics. We also show that the natural adversarial examples are in fact at a higher distance from the originals that in the case of artificially generated adversarial examples.
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Bueno G, Gonzalez-Lopez L, Garcia-Rojo M, Laurinavicius A, Deniz O. Data for glomeruli characterization in histopathological images. Data Brief 2020; 29:105314. [PMID: 32154349 PMCID: PMC7058889 DOI: 10.1016/j.dib.2020.105314] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Accepted: 02/13/2020] [Indexed: 11/16/2022] Open
Abstract
The data presented in this article is part of the whole slide imaging (WSI) datasets generated in European project AIDPATH 2 This data is also related to the research paper entitle “Glomerulosclerosis Identification in Whole Slide Images using Semantic Segmentation”, published in Computer Methods and Programs in Biomedicine Journal [1]. In that article, different methods based on deep learning for glomeruli segmentation and their classification into normal and sclerotic glomerulous are presented and discussed. The raw data used is described and provided here. In addition, the detected glomeruli are also provided as individual image files. These data will encourage research on artificial intelligence (AI) methods, create and compare fresh algorithms, and measure their usability in quantitative nephropathology.
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Affiliation(s)
- Gloria Bueno
- VISILAB, Universidad de Castilla-La Mancha, Ciudad Real, Spain
| | | | | | | | - Oscar Deniz
- VISILAB, Universidad de Castilla-La Mancha, Ciudad Real, Spain
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Bueno G, Fernandez-Carrobles MM, Gonzalez-Lopez L, Deniz O. Glomerulosclerosis identification in whole slide images using semantic segmentation. Comput Methods Programs Biomed 2020; 184:105273. [PMID: 31891905 DOI: 10.1016/j.cmpb.2019.105273] [Citation(s) in RCA: 67] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2019] [Revised: 11/12/2019] [Accepted: 12/10/2019] [Indexed: 05/25/2023]
Abstract
BACKGROUND AND OBJECTIVE Glomeruli identification, i.e., detection and characterization, is a key procedure in many nephropathology studies. In this paper, semantic segmentation based on convolutional neural networks (CNN) is proposed to detect glomeruli using Whole Slide Imaging (WSI) follows by a classification CNN to divide the glomeruli into normal and sclerosed. METHODS Comparison between U-Net and SegNet CNNs is performed for pixel-level segmentation considering both a two and three class problem, that is, a) non-glomerular and glomerular structures and b) non-glomerular normal glomerular and sclerotic structures. The two class semantic segmentation result is then used for a CNN classification where glomerular regions are divided into normal and global sclerosed glomeruli. RESULTS These methods were tested on a dataset composed of 47 WSIs belonging to human kidney sections stained with Periodic Acid Schiff (PAS). The best approach was the SegNet for two class segmentation follows by a fine-tuned AlexNet network to characterize the glomeruli. 98.16% of accuracy was obtained with this process of consecutive CNNs (SegNet-AlexNet) for segmentation and classification. CONCLUSION The results obtained demonstrate that the sequential CNN segmentation-classification strategy achieves higher accuracy reducing misclassified cases and therefore being the methodology proposed for glomerulosclerosis detection.
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Affiliation(s)
- Gloria Bueno
- University of Castilla-La Mancha, ETSI Industriales, VISILAB, Ciudad Real, Spain.
| | | | | | - Oscar Deniz
- University of Castilla-La Mancha, ETSI Industriales, VISILAB, Ciudad Real, Spain
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Vallez N, Krauss S, Espinosa-Aranda JL, Pagani A, Seirafi K, Deniz O. Automatic Museum Audio Guide. Sensors (Basel) 2020; 20:s20030779. [PMID: 32023954 PMCID: PMC7038402 DOI: 10.3390/s20030779] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Revised: 01/24/2020] [Accepted: 01/29/2020] [Indexed: 11/16/2022]
Abstract
An automatic “museum audio guide” is presented as a new type of audio guide for museums. The device consists of a headset equipped with a camera that captures exhibit pictures and the eyes of things computer vision device (EoT). The EoT board is capable of recognizing artworks using features from accelerated segment test (FAST) keypoints and a random forest classifier, and is able to be used for an entire day without the need to recharge the batteries. In addition, an application logic has been implemented, which allows for a special highly-efficient behavior upon recognition of the painting. Two different use case scenarios have been implemented. The main testing was performed with a piloting phase in a real world museum. Results show that the system keeps its promises regarding its main benefit, which is simplicity of use and the user’s preference of the proposed system over traditional audioguides.
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Affiliation(s)
- Noelia Vallez
- Visilab (Vision and Artificial Intelligence Group), University of Castilla-La Mancha (UCLM), E.T.S.I. Industrial, Avda Camilo Jose Cela s/n, 13071 Ciudad Real, Spain;
- Correspondence: (N.V.); (O.D.)
| | - Stephan Krauss
- DFKI (Deutsches Forschungszentrum für Künstliche Intelligenz), Augmented Vision Research Group, Tripstaddterstr. 122, 67663 Kaiserslautern, Germany; (S.K.); (A.P.)
| | - Jose Luis Espinosa-Aranda
- Visilab (Vision and Artificial Intelligence Group), University of Castilla-La Mancha (UCLM), E.T.S.I. Industrial, Avda Camilo Jose Cela s/n, 13071 Ciudad Real, Spain;
| | - Alain Pagani
- DFKI (Deutsches Forschungszentrum für Künstliche Intelligenz), Augmented Vision Research Group, Tripstaddterstr. 122, 67663 Kaiserslautern, Germany; (S.K.); (A.P.)
| | | | - Oscar Deniz
- Visilab (Vision and Artificial Intelligence Group), University of Castilla-La Mancha (UCLM), E.T.S.I. Industrial, Avda Camilo Jose Cela s/n, 13071 Ciudad Real, Spain;
- Correspondence: (N.V.); (O.D.)
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Lajara N, Espinosa-Aranda JL, Deniz O, Bueno G. Optimum web viewer application for DICOM whole slide image visualization in anatomical pathology. Comput Methods Programs Biomed 2019; 179:104983. [PMID: 31443854 DOI: 10.1016/j.cmpb.2019.104983] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Revised: 06/20/2019] [Accepted: 07/10/2019] [Indexed: 06/10/2023]
Abstract
BACKGROUND AND OBJECTIVE Digital scanners are being increasingly adopt-ed in anatomical pathology, but there is still a lack of a standardized whole slide image (WSI) format. This translates into the need for interoperability and knowledge representation for shareable and computable clinical information. This work describes a robust solution, called Visilab Viewer, able to interact and work with any WSI based on the DICOM standard. METHODS Visilab Viewer is a web platform developed and integrated alongside a proposed web architecture following the DICOM definition. To prepare the information of the pyramid structure proposed in DICOM, a specific module was defined. The same structure is used by a second module that aggregates on the cache browser the adjacent tiles or frames of the current user's viewport with the aim of achieving fast and fluid navigation over the tissue slide. This solution was tested and compared with three different web viewers, publicly available, with 10 WSIs. RESULTS A quantitative assessment was performed based on the average load time per frame together with the number of fully loaded frames. Kruskal-Wallis and Dunn tests were used to compare each web viewer latency results and finally to rank them. Additionally, a qualitative evaluation was done by 6 pathologists based on speed and quality for zooming, panning and usability. The proposed viewer obtained the best performance in both assessments. The entire architecture proposed was tested in the 2nd worldwide DICOM Connectathon, obtaining successful results with all participant scanner vendors. CONCLUSIONS The online tool allows users to navigate and obtain a correct visualization of the samples avoiding any restriction of format and localization. The two strategical modules allow to reduce time in displaying the slide and therefore, offer high fluidity and usability. The web platform manages not only the visualization with the developed web viewer but also includes the insertion, manipulation and generation of new DICOM elements. Visilab Viewer can successfully exchange DICOM data. Connectathons are the ultimate interoperability tests and are therefore required to guarantee that solutions as Visilab Viewer and its architecture can successfully exchange data following the DICOM standard. Accompanying demo video. (Link to Youtube video.).
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Affiliation(s)
- Nieves Lajara
- VISILAB, University of Castilla-La Mancha, Ciudad Real, Spain
| | | | - Oscar Deniz
- VISILAB, University of Castilla-La Mancha, Ciudad Real, Spain
| | - Gloria Bueno
- VISILAB, University of Castilla-La Mancha, Ciudad Real, Spain.
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Kelleci Cakir B, Yalcin N, Deniz O, Atac S, Tamer F, Olmez N, Akcay K, Demirkan K, Halil M, Abbasoglu O. SUN-PO201: One Year Monitorization Results of Patients Who Receive Clinical Nutrition Treatment. Clin Nutr 2019. [DOI: 10.1016/s0261-5614(19)32833-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Serrano I, Deniz O, Espinosa-Aranda JL, Bueno G. Fight Recognition in video using Hough Forests and 2D Convolutional Neural Network. IEEE Trans Image Process 2018; 27:4787-4797. [PMID: 29994215 DOI: 10.1109/tip.2018.2845742] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
While action recognition has become an important line of research in computer vision, the recognition of particular events such as aggressive behaviors, or fights, has been relatively less studied. These tasks may be extremely useful in several video surveillance scenarios such as psychiatric wards, prisons or even in personal camera smartphones. Their potential usability has led to a surge of interest in developing fight or violence detectors. One of the key aspects in this case is efficiency, that is, these methods should be computationally fast. "Handcrafted" spatiotemporal features that account for both motion and appearance information can achieve high accuracy rates, albeit the computational cost of extracting some of those features is still prohibitive for practical applications. The deep learning paradigm has been recently applied for the first time to this task too, in the form of a 3D Convolutional Neural Network that processes the whole video sequence as input. However, results in human perception of other's actions suggest that, in this specific task, motion features are crucial. This means that using the whole video as input may add both redundancy and noise in the learning process. In this work, we propose a hybrid "handcrafted/learned" feature framework which provides better accuracy than the previous feature learning method, with similar computational efficiency. The proposed method is compared to three related benchmark datasets. The method outperforms the different state-of-the-art methods in two of the three considered benchmark datasets.
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Deniz O, Sánchez-Sánchez C, Jaafar R, Kharche N, Liang L, Meunier V, Feng X, Müllen K, Fasel R, Ruffieux P. Electronic characterization of silicon intercalated chevron graphene nanoribbons on Au(111). Chem Commun (Camb) 2018; 54:1619-1622. [DOI: 10.1039/c7cc08353j] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The intrinsic electronic structure of chevron graphene nanoribbons are revealed through in situ silicon intercalation.
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Affiliation(s)
- O. Deniz
- Empa
- Swiss Federal Laboratories for Materials Science and Technology
- CH-8600 Dübendorf
- Switzerland
| | - C. Sánchez-Sánchez
- Empa
- Swiss Federal Laboratories for Materials Science and Technology
- CH-8600 Dübendorf
- Switzerland
| | - R. Jaafar
- Empa
- Swiss Federal Laboratories for Materials Science and Technology
- CH-8600 Dübendorf
- Switzerland
| | - N. Kharche
- Department of Physics
- Applied Physics, and Astronomy
- Rensselaer Polytechnic Institute
- Troy
- USA
| | - L. Liang
- Center for Nanophase Materials Sciences
- Oak Ridge National Laboratory
- Oak Ridge
- USA
| | - V. Meunier
- Department of Physics
- Applied Physics, and Astronomy
- Rensselaer Polytechnic Institute
- Troy
- USA
| | - X. Feng
- Chair of Molecular Functional Materials
- Department of Chemistry and Food Chemistry
- Technische Universität Dresden
- Germany
| | - K. Müllen
- Max Planck Institute for Polymer Research
- D-55128 Mainz
- Germany
| | - R. Fasel
- Empa
- Swiss Federal Laboratories for Materials Science and Technology
- CH-8600 Dübendorf
- Switzerland
- Department of Chemistry and Biochemistry
| | - P. Ruffieux
- Empa
- Swiss Federal Laboratories for Materials Science and Technology
- CH-8600 Dübendorf
- Switzerland
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Ruiz-Santaquiteria J, Espinosa-Aranda JL, Deniz O, Sanchez C, Borrego-Ramos M, Blanco S, Cristobal G, Bueno G. Low-cost oblique illumination: an image quality assessment. J Biomed Opt 2018; 23:1-14. [PMID: 29297212 DOI: 10.1117/1.jbo.23.1.016001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Accepted: 12/04/2017] [Indexed: 06/07/2023]
Abstract
We study the effectiveness of several low-cost oblique illumination filters to improve overall image quality, in comparison with standard bright field imaging. For this purpose, a dataset composed of 3360 diatom images belonging to 21 taxa was acquired. Subjective and objective image quality assessments were done. The subjective evaluation was performed by a group of diatom experts by psychophysical test where resolution, focus, and contrast were assessed. Moreover, some objective nonreference image quality metrics were applied to the same image dataset to complete the study, together with the calculation of several texture features to analyze the effect of these filters in terms of textural properties. Both image quality evaluation methods, subjective and objective, showed better results for images acquired using these illumination filters in comparison with the no filtered image. These promising results confirm that this kind of illumination filters can be a practical way to improve the image quality, thanks to the simple and low cost of the design and manufacturing process.
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Affiliation(s)
| | | | - Oscar Deniz
- University of Castilla-La Mancha, ETSI Industriales, Visilab, Ciudad Real, Spain
| | - Carlos Sanchez
- Institute of Optics "Daza de Valdés", Spanish National Research Council (CSIC), Madrid, Spain
| | | | - Saul Blanco
- University of León, Institute of Environment, León, Spain
| | - Gabriel Cristobal
- Institute of Optics "Daza de Valdés", Spanish National Research Council (CSIC), Madrid, Spain
| | - Gloria Bueno
- University of Castilla-La Mancha, ETSI Industriales, Visilab, Ciudad Real, Spain
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Abstract
The future paradigm of pathology will be digital. Instead of conventional microscopy, a pathologist will perform a diagnosis through interacting with images on computer screens and performing quantitative analysis. The fourth generation of virtual slide telepathology systems, so-called virtual microscopy and whole-slide imaging (WSI), has allowed for the storage and fast dissemination of image data in pathology and other biomedical areas. These novel digital imaging modalities encompass high-resolution scanning of tissue slides and derived technologies, including automatic digitization and computational processing of whole microscopic slides. Moreover, automated image analysis with WSI can extract specific diagnostic features of diseases and quantify individual components of these features to support diagnoses and provide informative clinical measures of disease. Therefore, the challenge is to apply information technology and image analysis methods to exploit the new and emerging digital pathology technologies effectively in order to process and model all the data and information contained in WSI. The final objective is to support the complex workflow from specimen receipt to anatomic pathology report transmission, that is, to improve diagnosis both in terms of pathologists' efficiency and with new information. This article reviews the main concerns about and novel methods of digital pathology discussed at the latest workshop in the field carried out within the European project AIDPATH (Academia and Industry Collaboration for Digital Pathology).
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Abstract
Plasma levels of the oxidants xanthine oxidase, nitric oxide and malondialdehyde and the antioxidants superoxide dismutase, glutathione peroxidase and glutathione reductase, together with total superoxide scavenger activity and non-enzymatic superoxide scavenger activity, were determined in 19 patients with acute ischaemic stroke and 20 controls. Compared with controls, superoxide dismutase, total superoxide scavenger activity, glutathione peroxidase and glutathione reductase activities were significantly lower, and nitric oxide and malondialdehyde levels significantly higher, in acute stroke patients. Xanthine oxidase showed a slight but non-significant increase in stroke patients compared with controls. There was no significant difference in non-enzymatic superoxide scavenger activity between the two groups. There was a positive correlation between glutathione reductase levels and Glasgow Coma Scale scores, and a negative correlation between malondialdehyde levels and non-enzymatic superoxide scavenger activity. These findings suggest that oxidative stress in patients with acute ischaemic stroke may be the result of an imbalance in oxidant/antioxidant homeostasis.
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Affiliation(s)
- R Aygul
- Department of Neurology, Medical Faculty, Atatürk University, Erzurum, Turkey
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18
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Bozkanat E, Tozkoparan E, Baysan O, Deniz O, Ciftci F, Yokusoglu M. The Significance of Elevated Brain Natriuretic Peptide Levels in Chronic Obstructive Pulmonary Disease. J Int Med Res 2016; 33:537-44. [PMID: 16222887 DOI: 10.1177/147323000503300509] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
We investigated the clinical significance of brain natriuretic peptide (BNP), a cardiac hormone, in chronic obstructive pulmonary disease (COPD). Subjects were 38 patients with stable COPD, of whom 20 had cor pulmonale (CP), and 22 were healthy individuals. Plasma BNP levels were measured and pulmonary arterial pressure (PAP) was estimated by echocardiography. Arterial blood gas analysis, forced vital capacity (FVC) and forced expiratory volume in 1 s (FEV1) were also recorded. BNP levels of patients with COPD were higher than those of controls (48.2 ± 37.5 and 9.3 ± 3.0 pg/ml). Patients with CP had a higher mean BNP level with respect to those without CP (73.9 ± 35.8 and 21.0 ± 10.2 pg/ml, respectively). BNP levels correlated with PAP ( r = 0.68), partial arterial oxygen pressure ( r = −0.70), FEV1 ( r = −0.65) and FVC ( r = −0.52). We have concluded that BNP determination has a role in the diagnosis of CP in patients with COPD.
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Affiliation(s)
- E Bozkanat
- Department of Pulmonary Medicine, Gulhane Military Medical Academy, Haydarpasa Training Hospital, Istanbul, Turkey.
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Ocal N, Dogan D, Ocal R, Tozkoparan E, Deniz O, Ucar E, Gumus S, Tasci C, Yildiz B, Taskin G, Taskin A, Badem S, Turhan U. Effects of radiological extent on neutrophil/lymphocyte ratio in pulmonary sarcoidosis. Eur Rev Med Pharmacol Sci 2016; 20:709-714. [PMID: 26957274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
OBJECTIVE Determining the severity of sarcoidosis is based on the clinical and radiological findings of the disease and the changes in pulmonary function test results. On the other hand; studies are ongoing for objective and easy markers in this respect. Neutrophil/lymphocyte ratio (NLR) is shown as a good prognostic marker for inflammation due to tissue damage in recent clinical trials. In this study, we aimed to identify the possible relationship between NLR and radiological extent of sarcoidosis. PATIENTS AND METHODS Data of 122 patients included in the study were evaluated retrospectively in terms of age, gender, complete blood count parameters, erythrocyte sedimentation rate (ESR) and radiological findings at the time of diagnosis. RESULTS Mean NLR and ESR were significantly different between radiological stages according to chest radiography and also total HRCT score (THS) groups according to parenchymal involvement in thorax tomography (p <0.05). Mean NLR was found to be 1.28 in stage 0, 1.65 in stage 1, 2.88 in stage 2,5.47 in stage 3 and 8.48 in stage 4; 1.63 in THS group 1, 2.01 in group 2, 3.47 in group 3 and 5.46 in group 4. There were statistically significant positive correlations between NLR and WBC, NLR and THS, NLR and ESR, THS and ESR, ESR and platelet, WBC and #neutrophil, WBC and #lymphocyte. CONCLUSIONS Our findings suggest that NLR might be used as a prognostic marker in pulmonary sarcoidosis.
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Affiliation(s)
- N Ocal
- Department of Intensive Care, Gulhane Military Medical Faculty, Ankara, Turkey.
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Salido-Tercero J, Bueno G, Deniz O. EP-1692: Phantom to patient registration applied to dosimetry. Radiother Oncol 2014. [DOI: 10.1016/s0167-8140(15)31810-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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21
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Vural G, Keklikoğlu H, Temel Ş, Deniz O, Ercan K. Comparison of double inversion recovery and conventional magnetic resonance brain imaging in patients with multiple sclerosis and relations with disease disability. Neuroradiol J 2013; 26:133-42. [PMID: 23859234 PMCID: PMC5228720 DOI: 10.1177/197140091302600201] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2013] [Accepted: 03/21/2013] [Indexed: 11/15/2022] Open
Abstract
Multiple sclerosis (MS) is an inflammatory demyelinating disease of the central nervous system, predominantly affecting the white matter, but also the grey matter. Aim of this study was to detect MS lesions with double inversion recovery (DIR), fluid-attenuated inversion recovery (FLAIR) and T2-weighted magnetic resonance (MR) techniques and determine the sensitivity of these techniques, and the correlation between the number of lesions and expanded disability state scale (EDSS) scores. Thirty-four patients with MS (20 females and 14 males) were included in this study. DIR and conventional MR (T2-A, FLAIR) sequences were obtained. Lesions were counted and classified as belonging to one of seven anatomical regions: cortical, juxtacortical, deep grey matter, deep white matter, mixed white matter-grey matter, periventricular white matter and infratentorial. The correlation between lesion number and EDSS scores was investigated. DIR images showed more intracortical and mixed white matter-grey matter lesions in comparison with both FLAIR and T2 sequences (p=0, p=0 respectively). There was a significant difference between mean lesion numbers at the juxtacortical region, obtained with DIR and T2-weighted images (p = 0.002). The total number of lesions obtained with all methods was similar. DIR brain imaging had the highest sensitivity in the detection of cortical and mixed white matter - grey matter lesions, compared with FLAIR and T2 sequences. In addition, the lesions obtained with DIR images were more easily visualized.
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Affiliation(s)
- G. Vural
- Department of Neurology, Atatürk Training and Research Hospital; Ankara, Turkey
| | - H.D. Keklikoğlu
- Department of Neurology, Atatürk Training and Research Hospital; Ankara, Turkey
| | - Ş. Temel
- Department of Neurology, Atatürk Training and Research Hospital; Ankara, Turkey
| | - O. Deniz
- Yıldırım Beyazıt University, Atatürk Training and Research Hospital; Ankara, Turkey
| | - K. Ercan
- Department of Radiology, Atatürk Training and Research Hospital; Ankara, Turkey
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Temel S, Keklikoğlu HD, Kekliğkoğlu HD, Vural G, Deniz O, Ercan K. Diffusion tensor magnetic resonance imaging in patients with multiple sclerosis and its relationship with disability. Neuroradiol J 2013; 26:3-17. [PMID: 23859160 DOI: 10.1177/197140091302600101] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2012] [Accepted: 01/27/2013] [Indexed: 11/17/2022] Open
Abstract
Multiple sclerosis is a chronic inflammatory demyelinating disease of the central nervous system. Diffusion tensor magnetic resonance imaging (DTI) can yield important information on the in vivo pathological processes affecting water diffusion. The aim of this study was to quantitatively define water diffusion in normal-appearing white matter (NAWM) distant from the plaque, in the plaque, and around the plaque, and to investigate the correlation of these changes with clinical disability. Conventional MRI and DTI scans were conducted in 30 patients with MS and 15 healthy individuals. Fractional anisotropy maps and visible diffusion coefficients were created and integrated with T2-weighted images. Regions of interest (ROIs) were placed on the plaques on the same side, white matter around the plaques and NAWM on the opposite side. Only the white matter of healthy individuals in the control group, and FA and ADC values were obtained for comparison. The highest FA and lowest ADC were detected in the control group at the periventricular region, cerebellar peduncle and at all ROIs irrespective of location. There was a significant difference in comparison to the control group at all ROIs in patients with MS (p < 0.001 for all comparisons). No significant correlation between diffusion parameters and expanded disability state scale (EDSS) scores was found in patients with MS. DTI may provide more accurate information on the damage due to the illness, compared to T2A sequences, but this damage may not be correlated with the clinical disability measured by EDSS score.
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Affiliation(s)
- S Temel
- Department of Neurology, Yıldırım Beyazıt University Atatürk Education and Research Hospital, Ankara, Turkey
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Kuloglu M, Caykoylu A, Ekinci O, Bayindirli D, Vural G, Deniz O. Successful management of depression with reboxetine in a patient who developed Parkinsonism related to paroxetine use. J Psychopharmacol 2010; 24:623-4. [PMID: 19074535 DOI: 10.1177/0269881108099962] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- M. Kuloglu
- Department of Psychiatry, Atatürk Education and Research Hospital, Ankara, Turkey
| | - A. Caykoylu
- Department of Psychiatry, Atatürk Education and Research Hospital, Ankara, Turkey
| | - O. Ekinci
- Department of Psychiatry, Atatürk Education and Research Hospital, Ankara, Turkey
| | - D. Bayindirli
- Department of Psychiatry, Atatürk Education and Research Hospital, Ankara, Turkey
| | - G. Vural
- Department of Neurology, Atatürk Education and Research Hospital, Ankara, Turkey
| | - O. Deniz
- Department of Neurology, Atatürk Education and Research Hospital, Ankara, Turkey
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Abstract
Rabbit syndrome (RS) is a rare side effect of prolonged neuroleptic administration characterised by rapid, fine, rhythmic movements of the mouth along a vertical axis. Long-term exposure to the first generation neuroleptics has clearly been associated with RS, but little is known regarding the risk of RS because of the exposure to the newer atypical antipsychotics. Aripiprazole is a new dopaminergic agent and has been reported to be clinically useful as an antipsychotic drug with reduced extrapyramidal motor side effects. In addition, there are some case reports concerning extrapyramidal side effects, which include tardive dyskinesia, parkinsonism and RS associated with aripiprazole. We present the case of a patient who developed RS during treatment with aripiprazole. Potential mechanisms, including D2 receptor occupancy, low anticholinergic properties and dopamine hypersensitivity theory, are discussed. Although studies with aripiprazole have shown a low liability for extrapyramidal side effects, the present case emphasises the need for caution when treating patients with aripiprazole.
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Affiliation(s)
- A Caykoylu
- Department of Psychiatry, Atatürk Education and Research Hospital, Ankara, Turkey
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25
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Aktas E, Ciftci F, Bilgic S, Sezer O, Bozkanat E, Deniz O, Citici U, Deniz G. Peripheral Immune Response in Pulmonary Tuberculosis. Scand J Immunol 2009; 70:300-8. [DOI: 10.1111/j.1365-3083.2009.02294.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Abstract
Spinal cavernous malformations are collections of abnormal blood vessels in the spinal cord. They are rare and frequently accompany cranial cavernous angiomas. They exhibit clinical features representing the region of the spine affected by the cavernous malformation. We present a 12-year-old boy with bilateral hypothermia predominantly in the left arm and motor weakness of the upper extremities, and lesser involvement of the lower extremities The case had normal cranial magnetic resonance imaging, but MRI of cervical region revealed an intramedullary cavernous haemangioma confirmed with histopathological examination. The lesion was totally excised and hypothermia completely improved within 2 weeks after operation. We suggested that hypothermia in the extremities may be added as a rare finding to the list of the clinical features in cervical myelopathy.
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Affiliation(s)
- A O Varoglu
- Department of Neurology, Medical Faculty, Ataturk University, 25240 Erzurum, Turkey.
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Ertaş M, Baykan B, Tuncel D, Gökçe M, Gökçay F, Sirin H, Deniz O, Oztürk V, Idiman F, Karli N, Zarifoğlu M, Yildiz N, Siva A, Saip S, Göksan B, Ak F, Aluçlu U, Duman T, Melek IM, Bulut S, Berilgen S. A comparative ID migraine screener study in ophthalmology, ENT and neurology out-patient clinics. Cephalalgia 2008; 29:68-75. [PMID: 18771489 DOI: 10.1111/j.1468-2982.2008.01702.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Migraine is more likely to be misdiagnosed in patients with comorbid diseases. Not only primary care physicians, but also specialists might misdiagnose it due to the lack of diagnostic criteria awareness. The ID migraine test is a reliable screening instrument that may facilitate and accelerate migraine recognition. This study aimed to compare the prevalence and characteristics of migraine in a large sample of patients admitted to clinics of ophthalmology (OC), ear, nose and throat diseases (ENTC) and neurology (NC), as well as to validate the use of the ID migraine test in OC and ENTC settings. This was a multicentre (11 cites) study of out-patients admitting either to NC, ENTC or OC of the study sites during five consecutive working days within 1 week. From each of the clinics, 100 patients were planned to be recruited. All recruited patients were interviewed and those having a headache complaint received an ID migraine test and were examined for headache diagnosis by a neurologist, blinded to the ID migraine test result. A total of 2625 subjects were recruited. Only 1.3% of OC patients and 5.4% of ENTC patients have been admitted with a primary complaint of headache, whereas the percentage of NC patients suffering from headache was 37.6%. Whereas 138 patients (19.3%) in OC, 154 (17.3%) in ENTC and 347 (34%) in NC were found to be ID migraine test positive, 149 patients (20.8%) in OC, 142 (16%) in ENTC and 338 (33.1%) in NC were diagnosed with migraine. The sensitivity, specificity, and positive and negative predictive ratios of the ID migraine test were found to be similar in all clinics. An important fraction of the patients admitted to NC, as well as to OC and ENTC, for headache and/or other complaints were found out to have migraine by means of a simple screening test. This study validated the ID migraine test as a sensitive and specific tool in OC and ENTC, encouraging its use as a screening instrument.
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Affiliation(s)
- M Ertaş
- Departments of Neurology, Medical Faculties of Istanbul University, Istanbul, Turkey
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Bozlar U, Ors F, Deniz O, Uzun M, Gumus S, Ugurel MS, Yazar F, Tayfun C. Pulmonary artery diameters measured by multidetector-row computed tomography in healthy adults. Acta Radiol 2007; 48:1086-91. [PMID: 17963079 DOI: 10.1080/02841850701545755] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
BACKGROUND The range of the diameters of pulmonary arteries (PA) is not fully shown in the current literature. Contrast-enhanced computed tomography (CT) of the thorax might be used for measuring diameters of the PA. PURPOSE To determine the diameters of PAs in subjects with normal PA pressure by using thoracic CT. MATERIAL AND METHODS 126 subjects aged between 19 and 46 years, having normal thoracic CTs (5-mm slice thickness) and normal PA pressures ((25 mmHg, determined by echocardiography), were included in the study. The diameters of the main, right, and left PAs were measured by using multidetector CT. RESULTS The main PA diameters of all the subjects showed a normal distribution, and the mean was 24.0 ± 2.8 mm. The main PA diameters in male and female subjects also showed a normal distribution. The difference between the sexes for the main PA diameters was not significant (P=0.08). There were correlations between main PA diameter and body-mass index (BMI) (R=0.41, P=0.001) and weight (R=0.34, P=0.001). However, there was no significant correlation between main PA diameter and height (R=0.05, P=0.6). CONCLUSION This study suggests that diameters of the main PA and its main branches show a normal distribution in subjects having normal PA pressures. Based on our findings, the upper limits of the main, right, and left PA diameters are 29.5 mm,19.8 mm, and 22.1 mm, respectively, in healthy adults.
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Affiliation(s)
- U. Bozlar
- Department of Radiology, Pulmonary Medicine, Cardiology, Emergency Medicine, and Anatomy, Gulhane Military Medical Academy, Ankara, Turkey
| | - F. Ors
- Department of Radiology, Pulmonary Medicine, Cardiology, Emergency Medicine, and Anatomy, Gulhane Military Medical Academy, Ankara, Turkey
| | - O. Deniz
- Department of Radiology, Pulmonary Medicine, Cardiology, Emergency Medicine, and Anatomy, Gulhane Military Medical Academy, Ankara, Turkey
| | - M. Uzun
- Department of Radiology, Pulmonary Medicine, Cardiology, Emergency Medicine, and Anatomy, Gulhane Military Medical Academy, Ankara, Turkey
| | - S. Gumus
- Department of Radiology, Pulmonary Medicine, Cardiology, Emergency Medicine, and Anatomy, Gulhane Military Medical Academy, Ankara, Turkey
| | - M. S. Ugurel
- Department of Radiology, Pulmonary Medicine, Cardiology, Emergency Medicine, and Anatomy, Gulhane Military Medical Academy, Ankara, Turkey
| | - F. Yazar
- Department of Radiology, Pulmonary Medicine, Cardiology, Emergency Medicine, and Anatomy, Gulhane Military Medical Academy, Ankara, Turkey
| | - C. Tayfun
- Department of Radiology, Pulmonary Medicine, Cardiology, Emergency Medicine, and Anatomy, Gulhane Military Medical Academy, Ankara, Turkey
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Tozkoparan E, Deniz O, Cakir E, Yaman H, Ciftci F, Gumus S, Ozcan O, Akgul OE, Bilgic H, Erbil K, Ekiz K. The diagnostic values of serum, pleural fluid and urine neopterin measurements in tuberculous pleurisy. Int J Tuberc Lung Dis 2005; 9:1040-5. [PMID: 16158898] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/04/2023] Open
Abstract
SETTING Pulmonary department of a medical academy in Ankara, Turkey. OBJECTIVE Neopterin is a marker of cell-mediated immunity, and it has been demonstrated that neopterin levels of various body fluids could be elevated in tuberculosis. We aimed to investigate diagnostic values of serum, pleural fluid and urine neopterin measurements in tuberculous pleurisy (TP). DESIGN Serum, pleural fluid and urine neopterin levels were measured in 34 patients with TP and in 29 patients with pleural effusion of non-tuberculous origin as controls. RESULTS Neopterin levels in serum, pleural fluid and urine (38.28 +/- 14.18 nmol/l, 38.97 +/- 14.18 nmol/l and 759.15 +/- 622.74 micromol/mol, respectively) were significantly higher in patients with TP than those with non-tuberculous pleural effusion (22.57 +/- 6.02 nmol/l, 21.88 +/- 6.90 nmol/l and 343.10 +/- 233.65 micromol/mol, respectively). Pleural fluid neopterin > or =30 mol/l gave the best diagnostic yield, with 85% sensitivity, 93% specificity, 94% positive predictive value, 84% negative predictive value and 89% diagnostic accuracy, although it is not superior to pleural fluid adenosine deaminase determination. CONCLUSION We have suggested that elevated serum, pleural fluid and urinary neopterin levels in TP with respect to pleural effusions of non-tuberculous origin may reflect activation of cell-mediated immunity and that pleural fluid neopterin measurement may be of value in the differential diagnosis of TP.
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Affiliation(s)
- E Tozkoparan
- Department of Pulmonary Medicine, Gulhane Military Medical Academy, Ankara, Turkey.
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Deniz O, Tozkoparan E, Yonem A, Ciftci F, Bozkanat E, Cakir E, Ozcan O, Narin Y, Bilgic H, Ekiz K, Demirci N. Low parathormone levels and hypercalcaemia in patients with pulmonary tuberculosis: relation to radiological extent of disease and tuberculin skin test. Int J Tuberc Lung Dis 2005; 9:317-21. [PMID: 15786897] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2023] Open
Abstract
AIM We hypothesised that serum calcium (Ca) and parathormone (PTH) levels correlate with radiological extent and that there may also be a relationship between the tuberculin skin test (TST), serum Ca and PTH levels in patients with pulmonary tuberculosis (PTB). MATERIALS AND METHODS Forty-four patients with active PTB and 33 healthy subjects were enrolled in the study. Serum Ca, PTH, magnesium and phosphate levels were measured in patients and controls and compared. Correlations were also investigated for TST values, erythrocyte sedimentation rate (ESR), the degree of radiological involvement, serum PTH and corrected Ca levels. RESULTS There was a significant difference between the two groups for mean serum PTH and corrected Ca levels. Significant correlations were detected between radiological extent of disease and serum PTH levels, between TST values and serum PTH levels and between ESR and serum PTH levels. We suggest that abnormal Ca metabolism in PTB patients is related to the radiological extent of disease. Factors determining the radiological extent of disease, predominantly the patient's immune status, may have an important role in modulating Ca metabolism in PTB patients.
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Affiliation(s)
- O Deniz
- Department of Pulmonary Medicine, Gulhane Military Medical Academy, GATA Gogus Hastaliklari AD, Etlik, Ankara 06018, Turkey.
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Ciftci F, Tozkoparan E, Deniz O, Bozkanat E, Kibaroglu E, Demirci N. The incidence of tuberculosis in the armed forces: a good reflection of the whole population. Int J Tuberc Lung Dis 2004; 8:965-8. [PMID: 15305478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/30/2023] Open
Abstract
OBJECTIVE Precise epidemiological data are essential to increase the efficiency of a tuberculosis (TB) control programme. In some countries significant numbers of TB cases go unrecorded or undetected. We aimed to investigate the incidence of TB in the Turkish Armed Forces (TAF), to obtain more reliable data on the entire population. DESIGN In 2001, all soldiers with a new diagnosis of TB were enrolled in the study based on the official records of 14 military hospitals. The demographic data of the cases were evaluated. RESULTS Six hundred and twenty-nine conscripts with TB were detected. Of these, 574 were aged between 20-24 years and 392 were smear-positive. The incidences of TB and smear-positive cases in TAF conscripts were calculated at respectively 76 and 47 per 100,000 population. When the age and sex distribution of the Turkish population and TB cases in Turkey were considered, the incidences of all TB and smear-positive TB in Turkey were estimated at respectively 33 and 17/100,000. These numbers are very close to those estimated by the World Health Organization. CONCLUSION In countries where military service is compulsory and case detection rates are low, the TB incidence of the armed forces is a reliable reflection of the rate in the whole population.
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Affiliation(s)
- F Ciftci
- Camlica Chest Disease Hospital, Gulhane Military Medical Academy, Istanbul, Turkey
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Tokdemir M, Polat SA, Acik Y, Gursu F, Cikim G, Deniz O. Blood zinc and copper concentrations in criminal and noncriminal schizophrenic men. Arch Androl 2003; 49:365-8. [PMID: 12893514 DOI: 10.1080/01485010390219746] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
This study investigated the effects of zinc and copper on the behavior of schizophrenic patients by comparing blood zinc and copper levels in criminal and noncriminal schizophrenic patients. Of the total 88 subjects, 44 were patients with schizophrenia and no criminal record who were being treated at the Elazig Mental Hospital and 44 were schizophrenic patients who had committed a crime and were sent to the same hospital upon a court order for monitoring, detention, and treatment. Of the subjects with criminal records, 31 (70%) had committed a violent crime and 13 (30%) had committed a nonviolent crime. The mean plasma zinc value was 68 +/- 1.55 microg/dL in the criminal subjects and 81 +/- 2.73 microg/dL in the noncriminal subjects ( p = .001). The mean serum copper value was 104 +/- 1.80 microg/dL in criminal subjects and 93 +/- 2.92 microg/dL in noncriminal subjects (p = .02). Mean plasma zinc values were significantly lower in criminal subjects when compared to noncriminal subjects, while mean serum copper values were significantly higher in criminal subjects than noncriminal subjects.
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Affiliation(s)
- M Tokdemir
- Department of Forensic Medicine, Firat University Faculty of Medicine, Elazig, Turkey.
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Abstract
We report a case with Behçet's disease with initial onset of affective symptoms. This disease most commonly affects the brain stem in the nervous system, but a large lesion is very rare in the pons; initial onset of affective symptoms has not yet been reported in literature. This case was treated successfully with corticosteroids. Total clinical improvement was observed and the lesion was reduced in size within nine months (1.5 x 1.3 cm to 0.2 x 0.4 cm).
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Affiliation(s)
- N Aydin
- Department of Psychiatry, Medical Faculty, Atatürk University, Erzurum, Turkey.
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Akarsu E, Pirim I, Capoğlu I, Deniz O, Akçay G, Unüvar N. Relationship between electroneurographic changes and serum ubiquitin levels in patients with type 2 diabetes. Diabetes Care 2001; 24:100-3. [PMID: 11194212 DOI: 10.2337/diacare.24.1.100] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
OBJECTIVE The aim of the present study was to investigate any relationship between serum ubiquitin levels and electroneurographic changes in peripheral nerves for patients with type 2 diabetes. RESEARCH DESIGN AND METHODS The study involved 34 patients (19 men, 15 women; mean age 46 +/- 13 years) with type 2 diabetes. Serum ubiquitin values were measured by sandwich enzyme-linked immunosorbent assay Measurement of nerve conduction velocity (NCV) was performed on three motor (median, tibial, and peroneal) and three sensory (median, ulnar, and sural) nerves. The value of motor compound muscle action potential (CMAP) was obtained from the sum of median, tibial, and peroneal motor nerve amplitudes, and sensory compound nerve action potential (CNAP) was computed as the sum of median and ulnar sensory nerve amplitudes. RESULTS Patients with diabetes were divided into three groups: group 1 (n = 8) had normal electroneurography results, group 2 (n = 8) had slowed NCV, and group 3 (n = 18) had low values of motor CMAP and/or sensory CNAP as well as slowed NCV. Mean ubiquitin level in group 3 (20.4 +/- 2.9 ng/dl) was significantly higher than that in group 1 (11.2 +/- 1.1 ng/dl, t = 11.5, P < 0.0001) and group 2 (13.2 +/- 2.7 ng/dl, t = 5.9, P < 0.0001). Serum ubiquitin levels were inversely correlated with motor CMAP (r = -0.68) and sensory CNAP (r = -0.61) values. CONCLUSIONS The results of this study indicate that there could be a relationship between the diminished amplitudes of axons of the peripheral nerve and the increase in serum ubiquitin levels in patients with type 2 diabetes. Further studies are required to confirm this relationship.
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Affiliation(s)
- E Akarsu
- Department of Endocrinology, Faculty of Medicine, University of Atatürk, Erzurum, Turkey
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Affiliation(s)
- O Deniz
- Department of Neurology, Ataturk University, Medical School, Erzurum, Turkey
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Ertunç V, Dane S, Karakuzu A, Deniz O. Higher herpes zoster infection frequency in right-handed patients and more frequent appearance in the left body side of females. Acta Derm Venereol 1997; 77:245. [PMID: 9188890 DOI: 10.2340/0001555577245] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
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