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Fadil M, El Bqaq I, Touarsa F, El Khamlichi A, Ech-Cherif El Kettani N, Fikri M, Jiddane M. [A rare cause of chronic headache]. Rev Med Interne 2023; 44:621-622. [PMID: 37393118 DOI: 10.1016/j.revmed.2023.06.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Accepted: 06/20/2023] [Indexed: 07/03/2023]
Affiliation(s)
- M Fadil
- Service de neuroradiologie, hôpital des spécialités, CHU Ibn Sina, Rabat, Maroc.
| | - I El Bqaq
- Service de neuroradiologie, hôpital des spécialités, CHU Ibn Sina, Rabat, Maroc
| | - F Touarsa
- Service de neuroradiologie, hôpital des spécialités, CHU Ibn Sina, Rabat, Maroc
| | - A El Khamlichi
- Service de neuroradiologie, hôpital des spécialités, CHU Ibn Sina, Rabat, Maroc
| | | | - M Fikri
- Service de neuroradiologie, hôpital des spécialités, CHU Ibn Sina, Rabat, Maroc
| | - M Jiddane
- Service de neuroradiologie, hôpital des spécialités, CHU Ibn Sina, Rabat, Maroc
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2
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Naggar A, Benmoussa M, Retal H, Aoufir OE, Jroundi L, Laamrani F. [Back pain of unusual cause]. Rev Med Interne 2023; 44:525-526. [PMID: 37088664 DOI: 10.1016/j.revmed.2023.04.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Accepted: 04/10/2023] [Indexed: 04/25/2023]
Affiliation(s)
- A Naggar
- Service de radiologie des urgences, CHU d'Ibn-Sina, Rabat, Maroc.
| | - M Benmoussa
- Service de radiologie des urgences, CHU d'Ibn-Sina, Rabat, Maroc
| | - H Retal
- Service de radiologie des urgences, CHU d'Ibn-Sina, Rabat, Maroc
| | - O El Aoufir
- Service de radiologie des urgences, CHU d'Ibn-Sina, Rabat, Maroc
| | - L Jroundi
- Service de radiologie des urgences, CHU d'Ibn-Sina, Rabat, Maroc
| | - F Laamrani
- Service de radiologie des urgences, CHU d'Ibn-Sina, Rabat, Maroc
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3
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Yatmaz BB, Raith S, Reich S. Accuracy of four recent intraoral scanners with respect to two different ceramic surfaces. J Dent 2023; 130:104414. [PMID: 36640842 DOI: 10.1016/j.jdent.2023.104414] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Revised: 12/09/2022] [Accepted: 01/09/2023] [Indexed: 01/13/2023] Open
Abstract
OBJECTIVES To investigate the complete arch accuracy of intraoral scanners (IOS) on two different ceramic surfaces. METHODS Two maxillary master cast samples were prepared. The bases of both the master casts were made from zirconium oxide. The difference between the two casts was that the teeth of the [ZR] cast were produced from zirconium oxide and that of the [LD] cast were made of lithium disilicate glass-ceramic. Unlike the zirconia teeth of the [ZR] cast, the lithium disilicate teeth of the [LD] cast were glazed. The two master casts were digitized using a high-resolution scanner (Atos Compact Scan 5 M, GOM GmbH, Braunschweig, Germany) to obtain digital reference casts. Subsequently, each master cast was scanned 15 times using four IOSs. The IOSs were the Cerec Omnicam [OM], Primescan [PR], Trios 4 [TR4], and VivaScan [VS]. On surface comparison, the absolute mean deviation values were obtained for trueness and precision. For multiple comparisons, statistically significant differences were analyzed using one-way ANOVA and the Kruskal-Wallis H test. The p-value was adjusted to control for the increased risk of type I error (p < 0.0083). To compare the two means, the t-test and Mann-Whitney U test were used (p < 0.05). RESULTS Trueness values for [ZR] ranged from 24.6 (±6.3) µm for [PR] and 77.1 (±8.3) µm for [OM]. Trueness values for [LD] were between 28.3 (±6.3) µm for [PR] and 72.8 (±15.6) µm for [OM]. Precision values for [ZR] ranged from 17.6 (±3.7) µm for [PR] to 37.3 (±9.9) µm for [OM]. Precision values for [LD] ranged from 17.5 (±3.6) µm for [PR] to 41.8 (±8.7) µm for [OM]. Statistically significant differences were found among all the IOSs (p < 0.0083). The trueness values of the four IOSs did not differ significantly (p < 0.05) with respect to either the [ZR] or [LD] cast. The precision values of [OM] and [VS] differed significantly with respect to the scanned surface. CONCLUSIONS Complete arch scans achieved with the four IOSs showed significantly different trueness and precision results. [VS] and [OM] were more sensitive in terms of the scanned material. CLINICAL SIGNIFICANCE The latest IOSs showed the required accuracy for complete arch digital impressions in-vitro investigations. These findings should be implemented under conditions relevant to complete arch deviations, such as the construction of occlusal splints, analysis of occlusal relationships, and long-span restorations. Clinicians should be aware that the clinically acceptable threshold varies depending on the purpose of the IOS.
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Carll T, Siddiqui F, Agni M, Poon R, Nash C, Gettings C, Cipriani N. Validation and implementation of Aperio LV1 remote live view telepathology system for intraoperative frozen section diagnosis. J Pathol Inform 2023; 14:100194. [PMID: 36844702 PMCID: PMC9947331 DOI: 10.1016/j.jpi.2023.100194] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Revised: 01/18/2023] [Accepted: 01/18/2023] [Indexed: 02/05/2023] Open
Abstract
Introduction Telepathology (TP) allows for remote slide review with performance comparable to traditional light microscopy. Use of TP in the intraoperative setting allows for faster turnaround and greater user convenience by obviating the physical presence of the attending pathologist. We sought to perform a practical validation of an intraoperative TP system using the Leica Aperio LV1 scanner in tandem with Zoom teleconferencing software. Methods A validation was performed in accordance with recommendations from CAP/ASCP, using a retrospectively identified sample of surgical pathology cases with a 1 year washout period. Only cases with frozen-final concordance were included. Validators underwent training in the operation of the instrument and conferencing interface, then reviewed the blinded slide set annotated with clinical information. Validator diagnoses were compared to original diagnoses for concordance. Results 60 slides were chosen for inclusion. 8 validators completed the slide review, each requiring 2 h. The validation was completed in 2 weeks. Overall concordance was 96.4%. Intraobserver concordance was 97.3%. No major technical hurdles were encountered. Conclusion Validation of the intraoperative TP system was completed rapidly and with high concordance, comparable to traditional light microscopy. Institutional teleconferencing implementation driven by the COVID pandemic facilitated ease of adoption.
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Lee M, Li H, Birla MB, Li G, Wang TD, Oldham KR. Capacitive Sensing for 2-D Electrostatic MEMS Scanner in a Clinical Endomicroscope. IEEE Sens J 2022; 22:24493-24503. [PMID: 37497077 PMCID: PMC10367433 DOI: 10.1109/jsen.2022.3216502] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/28/2023]
Abstract
A flexible fiber-coupled confocal laser endomicroscope has been developed using an electrostatic micro-electromechanical system (MEMS) scanner located in at distal optics to collect in vivo images in human subjects. Long transmission lines are required that deliver drive and sense signals with limited bandwidth. Phase shifts have been observed between orthogonal X and Y scanner axes from environmental perturbations, which impede image reconstruction. Image processing algorithms used for correction depend on image content and quality, while scanner calibration in the clinic can be limited by potential patient exposure to lasers. We demonstrate a capacitive sensing method to track the motion of the electrostatically driven two-dimensional MEMS scanner and to extract phase information needed for image reconstruction. This circuit uses an amplitude modulation envelope detection method on shared drive and sensing electrodes of the scanner. Circuit parameters were optimized for performance given high scan frequencies, transmission line effects, and substantial parasitic coupling of drive signal to circuit output. Extraction of phase information further leverages nonlinear dynamics of the MEMS scanner. The sensing circuit was verified by comparing with data from a position sensing detector measurement. The phase estimation showed an accuracy of 2.18° and 0.79° in X and Y axes for motion sensing, respectively. The results indicate that the sensing circuit can be implemented with feedback control for pre-calibration of the scanner in clinical MEMS-based imaging systems.
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Affiliation(s)
- Miki Lee
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Haijun Li
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Mayur B Birla
- Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Gaoming Li
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Thomas D Wang
- Departments of Internal Medicine, Biomedical Engineering, and Mechanical Engineering, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Kenn R Oldham
- Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI, 48109, USA
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6
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Sun Z, Qing M, Fan YZ, Yan H, Li NB, Luo HQ. Quadruple analyte responsive platform: Point-of-care testing and multi-coding logic computation based on metal ions recognition and selective response. J Hazard Mater 2022; 437:129331. [PMID: 35709623 DOI: 10.1016/j.jhazmat.2022.129331] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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: 03/14/2022] [Revised: 06/04/2022] [Accepted: 06/06/2022] [Indexed: 06/15/2023]
Abstract
While it is recognized that instrumentation techniques can provide precise and sensitive solutions to heavy metal ion monitoring, it remains challenging to transform laboratory testing into a convenient, on-site, and quantitative sensing platform for point-of-care testing (POCT) in a resource-constrained setting. To address these limitations, an affordable and user-friendly colorimetric POCT sensing system is proposed here for selectively monitoring four metal ions (Fe3+, Co2+, Pb2+, and Cd2+) based on the sulfur quantum dots (S dots). Quadruple distinct visual signals (green, brown, precipitation, and bright yellow) are presented on the fabricated paper-based analytical devices (PADs) when mixing S dots and metal ions. The high-quality photographs of the PADs are captured by a scanner, while a smartphone App converts visual signals to HSV values. The quantitative analysis relies on the digital colorimetric reading, and the limits of detection are 0.59, 0.47, 0.82, and 0.53 μM for Fe3+, Co2+, Cd2+, and Pb2+, respectively. This metal ions-responsive platform is engineered as a smart strategy for multiple logic operations (YES, NOT, AND, INHIBIT, and NOR) by integrating multi-responsive blocks into the S dots with encoded patterns, which improves the computing capability. Accordingly, this strategy demonstrates its potential for on-site environmental testing and sophisticated molecular computation.
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Affiliation(s)
- Zhe Sun
- Key Laboratory of Eco-Environments in Three Gorges Reservoir Region (Ministry of Education), School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Min Qing
- College of Pharmacy, Chongqing Medical University, Chongqing 400016, China
| | - Yu Zhu Fan
- College of Chemistry and Chemical Engineering, Chongqing University of Science and Technology, Chongqing 401331, China
| | - Hang Yan
- Key Laboratory of Eco-Environments in Three Gorges Reservoir Region (Ministry of Education), School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Nian Bing Li
- Key Laboratory of Eco-Environments in Three Gorges Reservoir Region (Ministry of Education), School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China.
| | - Hong Qun Luo
- Key Laboratory of Eco-Environments in Three Gorges Reservoir Region (Ministry of Education), School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China.
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Dulli R, Clark SD. Digital Cytology in Exotic Practice: Tips to Optimize Diagnosis. Vet Clin North Am Exot Anim Pract 2022; 25:663-78. [PMID: 36122945 DOI: 10.1016/j.cvex.2022.06.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Digitization has enhanced the utility of cytology in private practice by allowing for rapid sample receipt and analysis, leading to better informed real-time patient care. Despite many advantages of digital cytology, understanding its limitations is required to avoid common pitfalls. A strong foundation in sample preparation and imaging techniques is also required to obtain high-quality diagnostic samples. By optimizing these factors, the benefits of digital cytology are maximized, allowing for the practice of high-quality point-of-care medicine that best addresses the needs of the patient and pet owner in a rapid time frame.
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Oze KR, Bizimana W, Ben Elhosni K, Billal NM, Nassar I. [Pseudo-tumoral calcinosis of the hip in chronic hemodialysis]. Nephrol Ther 2022; 18:211-212. [PMID: 35144907 DOI: 10.1016/j.nephro.2021.12.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Revised: 12/07/2021] [Accepted: 12/13/2021] [Indexed: 11/28/2022]
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Ayegnon KG, Konate I, Kouadio AF, Kouassi KP, Bravo-Tsri AB, Tanoh KE, Vanga KM, Yao BL, Kouakou B, Sanogo S, N'Dri K. [Angiomyolipoma of the psoas: a case report and literature review]. Mali Med 2022; 38:51-55. [PMID: 38506201] [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] [Subscribe] [Scholar Register] [Indexed: 03/21/2024]
Abstract
The psoas major muscle is one of the three muscle chiefs of the ilio-psoas muscle. The pathological processes concerning it are dominated by tumor lesions which are mostly malignant. The diagnostic approach is based on the clinic and the abdomino-pelvic scanner. If necessary, it will make it possible to direct a puncture and / or a biopsy. We report the observation of a 33-year-old patient admitted to the Bouaké University Hospital presenting with a mass in the left iliac fossa and an intermittent claudication of chronic evolution in whom the diagnosis of a psoas tumor was diagnosedthrough the abdomino-pelvic scanner and the pathology concluded to an angiomyolipoma.
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Affiliation(s)
- Kouakou Grégoire Ayegnon
- UFR Sciences Médicales Université Alassane Ouattara (Bouaké, Côte d'Ivoire)
- Service de cardiologie et chirurgie cardio-vasculaire CHU de Bouaké (Bouaké, Côte d'Ivoire)
| | - Issa Konate
- UFR Sciences Médicales Université Alassane Ouattara (Bouaké, Côte d'Ivoire)
- Service de radiodiagnostic et imagerie médical CHU de Bouaké (Bouaké, Côte d'Ivoire)
| | - Allou Florent Kouadio
- UFR Sciences Médicales Université Alassane Ouattara (Bouaké, Côte d'Ivoire)
- Service de radiodiagnostic et imagerie médical CHU de Bouaké (Bouaké, Côte d'Ivoire)
| | - Kouamé Pb Kouassi
- UFR Sciences Médicales Université Alassane Ouattara (Bouaké, Côte d'Ivoire)
- Service de radiodiagnostic et imagerie médical CHU de Bouaké (Bouaké, Côte d'Ivoire)
| | - Akoli B Bravo-Tsri
- UFR Sciences Médicales Université Alassane Ouattara (Bouaké, Côte d'Ivoire)
- Service de radiodiagnostic et imagerie médical CHU de Bouaké (Bouaké, Côte d'Ivoire)
| | - Kessé Emile Tanoh
- UFR Sciences Médicales Université Alassane Ouattara (Bouaké, Côte d'Ivoire)
- Service de radiodiagnostic et imagerie médical CHU de Bouaké (Bouaké, Côte d'Ivoire)
| | - Koffi Marius Vanga
- UFR Sciences Médicales Université Alassane Ouattara (Bouaké, Côte d'Ivoire)
- Service de radiodiagnostic et imagerie médical CHU de Bouaké (Bouaké, Côte d'Ivoire)
| | - Brou Lamber Yao
- UFR Sciences Médicales Université Alassane Ouattara (Bouaké, Côte d'Ivoire)
- Service de radiodiagnostic et imagerie médical CHU de Bouaké (Bouaké, Côte d'Ivoire)
| | - Bouassa Kouakou
- UFR Sciences Médicales Université Alassane Ouattara (Bouaké, Côte d'Ivoire)
- Service de radiodiagnostic et imagerie médical CHU de Bouaké (Bouaké, Côte d'Ivoire)
| | - Sarah Sanogo
- UFR Sciences Médicales Université Alassane Ouattara (Bouaké, Côte d'Ivoire)
- Service de radiodiagnostic et imagerie médical CHU de Bouaké (Bouaké, Côte d'Ivoire)
| | - Kouadio N'Dri
- UFR Sciences Médicales Université Alassane Ouattara (Bouaké, Côte d'Ivoire)
- Service de radiodiagnostic et imagerie médical CHU de Bouaké (Bouaké, Côte d'Ivoire)
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Boldor N, Vaknin S, Myers V, Hakak N, Somekh M, Wilf-Miron R, Luxenburg O. Reforming the MRI system: the Israeli National Program to shorten waiting times and increase efficiency. Isr J Health Policy Res 2021; 10:57. [PMID: 34663450 DOI: 10.1186/s13584-021-00493-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Accepted: 10/02/2021] [Indexed: 11/18/2022] Open
Abstract
Background Long waiting times (WT) for Magnetic Resonance Imaging (MRI) are a challenge in many countries and demand is forecast to increase with ageing populations. Since MRI is essential for diagnosis in numerous medical conditions, timely performance is of the utmost importance. Objective To describe the multi-faceted program developed by the Israel Ministry of Health (MoH) to shorten WT for MRI and increase efficiency, and to examine lessons that can be learned for other health systems. Data sources Data were obtained from the Israel MoH from 2015–2019. Methods The plan used multiple strategies and comprised the following elements: providing additional scanners, dedicating additional personnel to MRI units, maximizing efficiency, establishing a training program for radiographers and a fellowship program for radiologists, introducing financial incentives to health maintenance organizations and implementing a computerized monitoring system. Results A substantial reduction in mean WT was demonstrated, from 52 days in 2015, to 24 days in 2016 and 2017. This was followed by a slight increase to 26 and 32 days in 2018 and 2019, respectively. The relative decline in WT from 2015 to 2019 was 38.5%. The number of scanners doubled during this period while the number of radiographers and radiologists with formal MRI training increased. Conclusions The broad scope of this comprehensive reform was successful in addressing long WT and improving care provision from a wide perspective: economic, workforce and infrastructure. Bottlenecks in the MRI system cannot be addressed from a single angle, rather requiring a whole system approach.
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Akan B, Akan E, Şahan AO, Kalak M. Evaluation of 3D Face-Scan images obtained by stereophotogrammetry and smartphone camera. Int Orthod 2021; 19:669-678. [PMID: 34544662 DOI: 10.1016/j.ortho.2021.08.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2021] [Revised: 08/22/2021] [Accepted: 08/26/2021] [Indexed: 10/20/2022]
Abstract
OBJECTIVE The purpose of this study is to compare and analyze the similarities between three-dimensional images captured by a smartphone camera with depth sensors and a conventional 3dMD Face system. MATERIALS AND METHODS Twenty six individuals (16 female, 10 male) were involved in this study, agreed to take part and as such had no paralysis, tics, etc., which may prevent taking the image. Anthropometric points were marked, and plasters were placed on the forehead, upper nasal dorsum and zygoma to determine matching areas. 3D images were captured with a DOF (Depth of Field) camera of a smartphone (iPhone X, Apple Inc. CA, USA) and a 3D imaging system (3dMD, Atlanta, GA, USA). Linear and angular measurements were carried. Overlapping area amounts of matched images and X, Y and Z coordinates of landmarks were compared. For comparison of the data, student t-test and Mann-Whitney U test were used at P<0.05. RESULTS Statistically significant changes were found in distance between inner commissures of right and left eye fissure and nasolabial angle. RMS (Root Mean Square) values were found between 0.58 and 1. CONCLUSION Images captured with a DOF camera of a smartphone, can be used to record and evaluate 3D soft tissue changes. However, due to the anatomical features of some regions, the deficiency of clear visualization needs improvements.
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Affiliation(s)
- Burçin Akan
- Izmir Katip Celebi University, Faculty of Dentistry, Department of Orthodontics, Izmir, Turkey.
| | - Ender Akan
- Izmir Katip Celebi University, Faculty of Dentistry, Department of Prosthodontics, Izmir, Turkey
| | | | - Mert Kalak
- Private Practice in Dentistry, Istanbul, Turkey
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12
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Oze Koudouhonon R, Imrani K, Aubin Igombe SR, Jerguigue H, Latib R, Omor Y. [An abdominal opacity]. Rev Med Interne 2021; 43:120-121. [PMID: 34535327 DOI: 10.1016/j.revmed.2021.08.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Revised: 07/24/2021] [Accepted: 08/29/2021] [Indexed: 10/20/2022]
Affiliation(s)
- R Oze Koudouhonon
- Département de radiologie, institut national d'oncologie, CHU Ibn Sina, Rabat, Maroc.
| | - K Imrani
- Département de radiologie, institut national d'oncologie, CHU Ibn Sina, Rabat, Maroc
| | - S R Aubin Igombe
- Département de radiologie, institut national d'oncologie, CHU Ibn Sina, Rabat, Maroc
| | - H Jerguigue
- Département de radiologie, institut national d'oncologie, CHU Ibn Sina, Rabat, Maroc
| | - R Latib
- Département de radiologie, institut national d'oncologie, CHU Ibn Sina, Rabat, Maroc
| | - Y Omor
- Département de radiologie, institut national d'oncologie, CHU Ibn Sina, Rabat, Maroc
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13
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Iraqi Houssaini Z, El Aoufir O, Khouchoua S, Jerguigue H, Latib R, Omor Y. [Lung nodules]. Rev Med Interne 2021; 42:885-886. [PMID: 34481685 DOI: 10.1016/j.revmed.2021.07.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Accepted: 07/17/2021] [Indexed: 11/28/2022]
Affiliation(s)
- Z Iraqi Houssaini
- Service de radiologie, Institut national d'oncologie, CHU Ibn Sina, Rabat, Maroc.
| | - O El Aoufir
- Service de radiologie, Institut national d'oncologie, CHU Ibn Sina, Rabat, Maroc
| | - S Khouchoua
- Service de radiologie, Institut national d'oncologie, CHU Ibn Sina, Rabat, Maroc
| | - H Jerguigue
- Service de radiologie, Institut national d'oncologie, CHU Ibn Sina, Rabat, Maroc
| | - R Latib
- Service de radiologie, Institut national d'oncologie, CHU Ibn Sina, Rabat, Maroc
| | - Y Omor
- Service de radiologie, Institut national d'oncologie, CHU Ibn Sina, Rabat, Maroc
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Abstract
Several studies have demonstrated improved clinical outcomes in pressure ulcer prevention using the SEM scanner, but none have compared it with other methods. In one of Scotland's health boards, 'hot spot' wards had been unable to reduce the number of hospital-acquired pressure ulcers (HAPUs) after several years of focused improvement work. In addition, other wards showed high use of dynamic therapy systems with associated costs. This review compares the use of a first generation SEM scanner versus a mattress and equipment selection pathway over a 6-week period. The findings show that the SEM scanner wards had zero HAPU while the equipment pathway wards developed a total of 4 HAPU. The two SEM scanner wards showed a 11% and 33% reduction in dynamic therapy use, while the pathway wards showed an average 40% increase. Consideration should be given to using SEM scanners to support staff decision-making to reduce HAPU development and dynamic therapy usage.
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Affiliation(s)
- Ruth Ropper
- Senior Nurse Advisor, TBM Contract, NHS Lothian. Previously Lead Nurse Tissue Viability, NHS Lothian (retired September 2020)
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Alazzam A, Aljarba S, Alshomer F, Alawirdhi B. The Utility of Smartphone 3D Scanning, Open-Sourced Computer-aided Design, and Desktop 3D Printing in the Surgical Planning of Microtia Reconstruction: a Step by Step Guide and Concept Assessment. JPRAS Open 2021; 30:17-22. [PMID: 34355054 PMCID: PMC8321891 DOI: 10.1016/j.jpra.2021.06.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [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: 04/04/2021] [Accepted: 06/10/2021] [Indexed: 11/17/2022] Open
Abstract
Introduction Microtia, a congenital anomaly of the auricle with a wide spectrum of presentation with challenging reconstruction. Management depends on its severity with variable reconstructive options. Preoperative planning is crucial to achieve better results and decrease operative time. In this article, we aim to show the utility of an affordable technology with the use of a smartphone, an open-source computer-aided design (CAD) software, and a desktop 3D printer in planning future ear location for unilateral microtia reconstruction in step-by-step fashion. Methodology Facial 3D scanning was done using a smartphone that has a three-dimensional capture system. The scan was then used in an open-sourced CAD software. A mirror image mask was created by reflecting normal side anatomic features to the abnormal side. The mask constitutes the desired area for reconstruction given the ear anthropometrics. Finally, the model was 3D printed and fitted to the patient in which incision marking and framework location was planned. Discussion Ear reconstruction requires careful assessment and specific technicality in its anthropometric measures. One important aspect in surgical planning resides in future ear location that varies between person to person. This variability makes the reconstructive option more customized based on the patient's needs. The utility of CAD software in the measurement and planning can help predict and optimize postoperative results as possible; however, it has major technical demands and added surgical fees. Conclusion Herein, we demonstrate the efficacy of an easy-to-use system beneficial for preoperative planning that is affordable, time-saving, and cost effective.
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Affiliation(s)
- Abdualziz Alazzam
- Plastic and Reconstructive Surgery Division, Surgery department, Ministry of National Guards Health Affairs, King Abdulaziz Medical City, Riyadh, Saudi Arabia.,King Abdullah International Medical Research Center, Riyadh, Saudi Arabia
| | - Sultan Aljarba
- King Abdullah International Medical Research Center, Riyadh, Saudi Arabia.,College of Medicine, King Saud bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia
| | - Feras Alshomer
- Plastic and Reconstructive Surgery Division, Surgery department, Ministry of National Guards Health Affairs, King Abdulaziz Medical City, Riyadh, Saudi Arabia.,King Abdullah International Medical Research Center, Riyadh, Saudi Arabia
| | - Bassam Alawirdhi
- Department of Plastic Surgery, Prince Sultan Military Medical City, Riyadh, Saudi Arabia
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El Aoufir O, Horache K, Boujida I, Ghannam A, Jerguigue H, Latib R, Omor Y. [Bilateral dorsal masses]. Rev Med Interne 2021; 42:807-808. [PMID: 34052050 DOI: 10.1016/j.revmed.2021.05.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2021] [Accepted: 05/09/2021] [Indexed: 11/29/2022]
Affiliation(s)
- O El Aoufir
- Département de radiologie, institut national d'oncologie, université Mohamed V, Rabat, Maroc.
| | - K Horache
- Département de radiologie, institut national d'oncologie, université Mohamed V, Rabat, Maroc
| | - I Boujida
- Département d'anatomopathologie, institut national d'oncologie, université Mohamed V, Rabat, Maroc
| | - A Ghannam
- Département de chirurgie traumatologique et orthopédique, université Mohamed V, Rabat, Maroc
| | - H Jerguigue
- Département de radiologie, institut national d'oncologie, université Mohamed V, Rabat, Maroc
| | - R Latib
- Département de radiologie, institut national d'oncologie, université Mohamed V, Rabat, Maroc
| | - Y Omor
- Département de radiologie, institut national d'oncologie, université Mohamed V, Rabat, Maroc
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Yatmaz BB, Raith S, Reich S. Trueness evaluation of digital impression: The impact of the selection of reference and test object. J Dent 2021; 111:103706. [PMID: 34077800 DOI: 10.1016/j.jdent.2021.103706] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Revised: 04/30/2021] [Accepted: 05/20/2021] [Indexed: 11/29/2022] Open
Abstract
OBJECTIVES This study evaluated the importance of defining the reference and the test object during 3D surface comparisons to assess the trueness of an intraoral scanner. MATERIALS AND METHODS A maxillary complete-arch cast with interdental spaces was digitized with a high-resolution scanner to obtain the ground truth dataset [GT]. Fifteen intraoral scanning datasets [IOS] were obtained with an intraoral scanner. The trueness of the [IOS] datasets were evaluated by two different comparison procedures using a 3D analysis software: In the first comparison [REF-GT], the [GT] dataset was set as reference object and the [IOS] dataset was defined as test object. In the second comparison [REF-IOS], the [IOS] dataset were set as reference object and the [GT] dataset was defined as test object. The mean trueness of both comparisons was calculated with absolute mean deviation, (90-10)/2 percentile, and root-mean-squared (RMS) error method. Statistical significance was analyzed using the t-test (α=0.05). RESULTS The mean trueness values of [REF-GT] were 31.4(±6.1) µm for (90-10)/2 percentile, 77.0(±5.3) µm for absolute mean deviation, and 203.1(±4.8) µm for RMS error method. [REF-IOS] revealed 23.9(±4.8) µm, 28.3(±6.3) µm, and 39.6(±9.5) µm, respectively. The results differed significantly. CONCLUSION The datasets obtained from the intraoral scanner captured more adequately interproximal spaces in comparison to the [GT] dataset. Therefore, the [GT] dataset defined as reference object in the analysis software for 3D comparisons revealed misleading results. CLINICAL SIGNIFICANCE The selection of the reference object and of the areas to be compared have to be defined carefully regarding complete arch scanning accuracy analysis.
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Affiliation(s)
- Berfin Bahar Yatmaz
- Dentist and doctorate student, Subject and Research Area of Computerized Dentistry at the Department of Prosthodontics and Biomaterials, RWTH Aachen University, Pauwelsstrasse 30, Aachen D-52074, Germany.
| | - Stefan Raith
- Engineer, Subject and Research Area of Computerized Dentistry at the Department of Prosthodontics and Biomaterials, RWTH Aachen University, Aachen, Germany
| | - Sven Reich
- Professor, Subject and Research Area of Computerized Dentistry at the Department of Prosthodontics and Biomaterials, RWTH Aachen University, Aachen, Germany
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Estermann L, Roner S, Schweizer A. Triquetrum osteotomy to approach an otherwise inaccessible coronal malunion of the hamate. Hand Surg Rehabil 2021; 40:519-523. [PMID: 33864940 DOI: 10.1016/j.hansur.2021.04.002] [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: 08/04/2020] [Revised: 02/07/2021] [Accepted: 04/07/2021] [Indexed: 11/16/2022]
Abstract
Fractures of the hamate are rare, and a clear treatment algorithm does not exist. Nonetheless, surgical treatment is generally recommended for displaced fractures using a dorsal approach. There is also a lack of data on hamate malunion. We present a case of a 28-year-old female with a coronal malunion of the hamate and hamate hook fracture. Because the triquetrum prevented direct access to the fracture, we planned and undertook a transtriquetral coronal osteotomy based on three-dimensional computed tomography imaging data. After removing the bone callus, reduction was possible with subsequent fixation. We recommend performing a transtriquetral osteotomy to treat an otherwise inaccessible fracture or malunion of select hamate fractures.
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Affiliation(s)
- L Estermann
- Department of Hand Surgery, Balgrist University Hospital, Forchstrasse 340, 8008 Zurich, Switzerland.
| | - S Roner
- Department of Hand Surgery, Balgrist University Hospital, Forchstrasse 340, 8008 Zurich, Switzerland
| | - A Schweizer
- Department of Hand Surgery, Balgrist University Hospital, Forchstrasse 340, 8008 Zurich, Switzerland
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Bravo-Tsri A, Konaté I, Kouassi K, Acko-Ohui E, Goulé-BI A, Isart D, Tanoh E, Vangah M, Kouadio F, Yao B. Meningeal tuberculoma mimicking a brain tumor. Radiol Case Rep 2021; 16:284-288. [PMID: 33299510 PMCID: PMC7708657 DOI: 10.1016/j.radcr.2020.11.028] [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: 09/11/2020] [Revised: 11/14/2020] [Accepted: 11/15/2020] [Indexed: 11/17/2022] Open
Abstract
Meningeal tuberculoma is one of the most serious sites of tuberculosis. Its incidence varies depending on the geographical area, rare in Western countries and frequent in developing countries where it represents 5% to 10% of intracranial masses. We report the case of a 21-year-old male patient with no particular medical history from Africa and living in Europe for more than a year, is hospitalized for an isolated inaugural, generalized, afebrile seizure in whom the scanner and cerebral magnetic resonance imaging (MRI) revealed a meningeal mass with significant glove finger edema suggesting a primary brain tumor. Surgical excision and anatomopathological analysis of the excisional piece allowed the diagnosis of tuberculoma. Meningeal tuberculoma is a source of diagnostic error because its clinical and radiological expression can mimic a brain tumor. This is an etiology that should not be ignored in the face of a meningeal mass in any subject coming from or living in a region with a high endemic tuberculosis.
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Affiliation(s)
- Akoli Eklou Baudouin Bravo-Tsri
- Radiology Department, Bouaké University Hospital, 01 BP 1174 Bouaké 01, 00225 Bouaké, Ivory Coast
- Radiology Department, Center hospitalier de Blois, Pierre Mail Charlot, 41016 Blois, France
| | - Issa Konaté
- Radiology Department, Bouaké University Hospital, 01 BP 1174 Bouaké 01, 00225 Bouaké, Ivory Coast
| | | | - Estelle Valérie Acko-Ohui
- Radiology Department, Center hospitalier de Blois, Pierre Mail Charlot, 41016 Blois, France
- Radiology Department, Treichville University Hospital, Bd. de Marseille, 01 BP V03 Abidjan 01, 00225 Abidjan, Ivory Coast
| | - Ange Roland Goulé-BI
- Radiology Department, Center hospitalier de Blois, Pierre Mail Charlot, 41016 Blois, France
| | - Dominique Isart
- Radiology Department, Center hospitalier de Blois, Pierre Mail Charlot, 41016 Blois, France
| | - Emile Kesse Tanoh
- Radiology Department, Bouaké University Hospital, 01 BP 1174 Bouaké 01, 00225 Bouaké, Ivory Coast
| | - Marius Koffi Vangah
- Radiology Department, Bouaké University Hospital, 01 BP 1174 Bouaké 01, 00225 Bouaké, Ivory Coast
| | - Florent Allou Kouadio
- Radiology Department, Bouaké University Hospital, 01 BP 1174 Bouaké 01, 00225 Bouaké, Ivory Coast
| | - B. L. Yao
- Radiology Department, Bouaké University Hospital, 01 BP 1174 Bouaké 01, 00225 Bouaké, Ivory Coast
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Abstract
INTRODUCTION Asthma is a common disease whose diagnosis does not typically rely on the results of imaging. However, chest CT has gained a key place over the last decade to support the management of patients with difficult to treat and severe asthma. STATE OF THE ART Bronchial wall thickening and mild dilatation or narrowing of bronchial lumen are frequently observed on chest CT in people with asthma. Bronchial wall thickening is correlated to the degree of obstruction and to bronchial wall remodeling and inflammation. Diverse conditions which can mimic asthma should be recognized on CT, including endobronchial tumours, interstitial pneumonias, bronchiectasis and bronchiolitis. Ground-glass opacities and consolidation may be related to transient eosinophilic infiltrates, infection or an associated disease (vasculitis, chronic eosinophilic pneumonia). Hyperdense mucous plugging is highly specific for allergic bronchopulmonary aspergillosis. PERSPECTIVES Airway morphometry, air trapping and quantitative analysis of ventilatory defects, with CT or MRI, can help to identify different morphological subgroups of patients with different functional or inflammatory characteristics. These imaging tools could emerge as new biomarkers for the evaluation of treatment response. CONCLUSION Chest CT is indicated in people with severe asthma to search for additional or alternative diagnoses. Quantitative imaging may contribute to phenotyping this patient group.
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Affiliation(s)
- M-P Debray
- Service de Radiologie, Assistance Publique-Hôpitaux de Paris, Hôpital Bichat, 46, rue Henri Huchard, 75018 Paris; Inserm UMR1152, France.
| | - M Ghanem
- Service de Pneumologie et Centre de Référence constitutif des Maladies Pulmonaires Rares, Assistance Publique-Hôpitaux de Paris, Hôpital Bichat, France
| | - A Khalil
- Service de Radiologie, Assistance Publique-Hôpitaux de Paris, Hôpital Bichat, 46, rue Henri Huchard, 75018 Paris; Université de Paris, Inserm UMR1152, France
| | - C Taillé
- Service de Pneumologie et Centre de Référence constitutif des Maladies Pulmonaires Rares, Assistance Publique-Hôpitaux de Paris, Hôpital Bichat, France; Département Hospitalo-Universitaire FIRE ; Université de Paris ; Inserm UMR 1152 ; LabEx Inflamex, 75018 Paris, France
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21
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Rousselle A, Amelot A, Thariat J, Jacob J, Mercy G, De Marzi L, Feuvret L. Metallic implants and CT artefacts in the CTV area: Where are we in 2020? Cancer Radiother 2020; 24:658-666. [PMID: 32859465 DOI: 10.1016/j.canrad.2020.06.022] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [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: 05/22/2020] [Revised: 06/25/2020] [Accepted: 06/25/2020] [Indexed: 12/18/2022]
Abstract
Radiation therapy (RT) is one of the main modalities of cancer treatment worldwide with computed tomography (CT), as the most commonly used imaging method for treatment planning system (TPS). Image reconstruction errors may greatly affect all the radiation therapy planning process, such as target delineation, dose calculation and delivery, particularly with particle therapy. Metallic implants, such as hip and spinal implants, and dental filling significantly deteriorate image quality. These hardware structures are often very complex in geometry leading to geometric complex artefacts in the clinical target volume (CTV) area, rendering the delineation of CTV challenging. In our review, we focus on the methods to overcome artefact consequences on CTV delineation: 1- medical approaches anticipating issues associated with imaging artefacts during preoperative multidisciplinary discussions while following standard recommendations; 2- common metal artefact reduction (MAR) methods such as manually override artefact regions, ballistics avoiding beam paths through implanted materials, megavoltage-CT (MVCT); 3- prospects with radiolucent implants, MAR algorithms and various methods of dual energy computed tomography (DECT). Despite substantial and broad evidence for their benefits, there is still no universal solution for cases involving implanted metallic devices. There is still a high need for research efforts to adapt technologies to our issue: "how do I accurately delineate the ideal CTV in a metal artefact area?"
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Affiliation(s)
- A Rousselle
- Department of Radiation Oncology, Sorbonne Université, AP-HP, hôpitaux universitaires La Pitié Salpêtrière-Charles-Foix, 75013 Paris, France
| | - A Amelot
- Department of Neurosurgery, CHRU de Tours, 37000 Tours, France
| | - J Thariat
- Department of Radiation Oncology, centre François-Baclesse/ARCHADE, Laboratoire de physique corpusculaire IN2P3-UMR6534 - Normandie Université, 1400 Caen, France
| | - J Jacob
- Department of Radiation Oncology, Sorbonne Université, AP-HP, hôpitaux universitaires La Pitié Salpêtrière-Charles-Foix, 75013 Paris, France
| | - G Mercy
- Department of Medical Imaging, Sorbonne Université, AP-HP, hôpitaux universitaires La Pitié Salpêtrière-Charles-Foix, 75013 Paris, France
| | - L De Marzi
- Institut Curie, PSL Research University, Radiation Oncology Department, Proton Therapy Centre, Centre universitaire, 91898 Orsay, France
| | - L Feuvret
- Department of Radiation Oncology, Sorbonne Université, AP-HP, hôpitaux universitaires La Pitié Salpêtrière-Charles-Foix, 75013 Paris, France.
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Andrejak C, Blanc FX, Costes F, Crestani B, Debieuvre D, Perez T, Philippe B, Plantier L, Schlemmer F, Sesé L, Stach B, Uzunhan Y, Zanetti C, Zysman M, Raherison C, Maitre B. [Guide for follow-up of patients with SARS-CoV-2 pneumonia. Management proposals developed by the French-language Respiratory Medicine Society. Version of 10 May 2020]. Rev Mal Respir 2020; 37:505-10. [PMID: 32410773 DOI: 10.1016/j.rmr.2020.05.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2020] [Accepted: 05/11/2020] [Indexed: 12/21/2022]
Abstract
La Société de pneumologie de langue française propose un guide pour le suivi respiratoire des patients ayant présenté une pneumonie à SARS-CoV-2 à partir des données connues des précédentes épidémies, des lésions aiguës constatées chez ces patients et d’opinions d’experts. Ce guide propose une conduite à tenir selon le type de patients : (1) patient pris en charge en ville pour une infection à SARS-CoV-2 possible ou prouvée adressé par son médecin traitant pour dyspnée persistante, (2) patient hospitalisé pour pneumonie à SARS-CoV-2 en unité conventionnelle, (3) patient hospitalisé pour pneumonie à SARS-CoV-2 ayant fait un séjour en réanimation. Le suivi ultérieur sera à adapter au bilan initial. Ce guide insiste sur le fait qu’il ne faut pas méconnaître les autres causes de dyspnée (cardiaques, thromboemboliques, syndrome d’hyperventilation, …). Ces propositions pourront évoluer dans le temps au fil des connaissances sur le sujet.
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Matsuda T, Kurahashi K, Maeda N, Goto T, Ichikawa T. Geometric assessment of imaging methods for complete denture form: Comparisons among cone-beam computed tomography, desktop dental scanning, and handheld optical scanning. J Prosthodont Res 2020; 64:485-489. [PMID: 32063544 DOI: 10.1016/j.jpor.2020.01.003] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2019] [Revised: 11/29/2019] [Accepted: 01/08/2020] [Indexed: 11/30/2022]
Abstract
PURPOSE The present study aimed to examine three methods for imaging a complete denture form and to discuss the geometric assessment and availability of these methods. METHODS Three methods were used: cone-beam computed tomography (CBCT), desktop dental scanning (DDS), and handheld optical scanning (HOS). Three sides of a cuboid resin block of a known size were measured on the captured images. Ten upper and lower complete dentures were digitized using each of the three methods. The denture forms in the standard triangulated language format were reconstructed using the computer aided design software with three resolutions: 0.1, 0.5 and 1.0. The two images were superimposed through a least-square algorithm, and the mean differences were examined among the three types of imaging methods and resolutions. RESULTS The smallest mean differences and variations were obtained for CBCT and DDS, followed by HOS in the experiment using resin block. The lengths of longitudinal and horizontal sides were shortened in CBCT and DDS, whereas the height was shortened in HOS. The variations in each direction were very small by repetitive imaging within every imaging method. The difference between the CBCT and DDS was significantly smaller than that in the other two groups in experiment using actual dentures. The influence of resolution was comparatively low. CONCLUSIONS The results suggested that CBCT and DDS had a similar geometric assessment, but that of the HOS was lower.
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Affiliation(s)
- Takashi Matsuda
- Department of Prosthodontics and Oral Rehabilitation, Tokushima University Graduate School of Biomedical Sciences, 3-18-15 Kuramoto-cho, Tokushima 770-8504, Japan.
| | - Kosuke Kurahashi
- Department of Prosthodontics and Oral Rehabilitation, Tokushima University Graduate School of Biomedical Sciences, 3-18-15 Kuramoto-cho, Tokushima 770-8504, Japan
| | - Naoki Maeda
- Department of Oral and Maxillofacial Radiology, Tokushima University, Tokushima, Japan
| | - Takaharu Goto
- Department of Prosthodontics and Oral Rehabilitation, Tokushima University Graduate School of Biomedical Sciences, 3-18-15 Kuramoto-cho, Tokushima 770-8504, Japan
| | - Tetsuo Ichikawa
- Department of Prosthodontics and Oral Rehabilitation, Tokushima University Graduate School of Biomedical Sciences, 3-18-15 Kuramoto-cho, Tokushima 770-8504, Japan
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Kamnik R, Nekrep Perc M, Topolšek D. Using the scanners and drone for comparison of point cloud accuracy at traffic accident analysis. Accid Anal Prev 2020; 135:105391. [PMID: 31835075 DOI: 10.1016/j.aap.2019.105391] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [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: 04/08/2019] [Revised: 11/05/2019] [Accepted: 12/01/2019] [Indexed: 06/10/2023]
Abstract
The purpose of the paper is to describe, compare and analyse the instruments used, time needed and accuracy of gathered data, sketches, 3D models and to enhance the extracted information about the accident. Simple sketches and tape measurements were performed. Also complex 3D measurements and 3D modelling of the scene with Terrestrial Laser Scanners (TLS) and Unmanned Aerial Vehicle (UAV) technology were used. A classical police work dealing with a simulated traffic accident was compared to sketches obtained from 3D models from Riegl VZ-400i 3D, Faro Focus S70, Geoslam ZebRevo 3D TLS and Topcon Falcon 8 drone. For 3D modelling an orthophoto from drone photos and point clouds were obtained. 3D models were graphically compared in CloudCompare software. Sketches were made for each measuring method and their accuracies were also compared one to each other. The graphical distance accuracy in scene measurements ranged up to 17 cm in comparison to police measurement but in the most course point cloud. Average absolute difference in compared distances amounts up to 6 cm. As expected, more points in the cloud means better 3D model and easier analysis. There is considerable reduction of time needed for collecting the accident scene data. The obtained 3D model is a permanent archive of the scene of a traffic accident. From the cadre, both visual and dimensional information subsequently can be obtained.
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Affiliation(s)
- Rok Kamnik
- Faculty of Civil Engineering, Transportation Engineering and Architecture, University of Maribor, Maribor, Slovenia.
| | - Matjaž Nekrep Perc
- Faculty of Civil Engineering, Transportation Engineering and Architecture, University of Maribor, Maribor, Slovenia
| | - Darja Topolšek
- Faculty of Logistics, University of Maribor, Celje, Slovenia
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Camille C, Alexandre C, Vincent R, Kevin K, Olivier B. The medical and operational impact of the deployment of a scanner within Role 2 in Mali for the French army. Injury 2020; 51:66-9. [PMID: 31591008 DOI: 10.1016/j.injury.2019.09.029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Revised: 09/05/2019] [Accepted: 09/19/2019] [Indexed: 02/02/2023]
Abstract
INTRODUCTION According to the NATO classification, the difference between Role 2 and Role 2+ is the presence of extra diagnostic and therapeutic means, including the deployment of a scanner. The aim of this study is to analyze the impact of this deployment at the front, in the Gao French Role 2 (Mali). Our main hypothesis is that the presence of a scanner at the front improves the servicemen's diagnostic and therapeutic management abilities. Secondly that scanner holds strategic relevance by limiting the repatriation of servicemen on medical grounds. MATERIALS AND METHODS A prospective analytical observational study was conducted over 6 months within Gao's Role 2. All the French military patients who received a scanner were involved. The collected data was epidemiological, clinical and radiological in nature, and included the results from the scanner and data regarding the operational impact (repatriation). The principal judgment criterion was the rate of modification of the therapeutic decision. The secondary criterion was the modification of the repatriation decision on medical grounds. RESULTS Of the 45 patients examined, in 14 cases (31.1%), performing a scanner changed patients' therapeutic management in relation to the management, which would have been conducted in the scanner's absence. For 12 of these patients (85.7%), the indication of the scanner concerned visceral or cranium-spine pathologies. For 33 patients (73.3%), the scanner enabled diagnosis via the elimination of an organic injury or a severity criterion. The repatriation decision remained unchanged for many patients. DISCUSSION The scanner appears to be a significant factor in the initial therapeutic decision. Scanning made it possible to clarify the diagnosis and to better adapt the initial therapeutic decision. In contrast, the operational impact was null. The literature highlights the relevance of scanner in surgical abstention (limiting unnecessary operative procedures), and for the visceral, cranium-cerebral and spine pathologies in an emergency. CONCLUSION The scanner, a heavy logistic unit deployed within a forward surgical unit, holds therapeutic relevance for French servicemen's management with an important medical service provided for the therapeutic choices, although its operational impact has yet to be demonstrated.
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Abstract
The number of TAVI procedures is rapidly increasing owing to the extension of indications. Procedural and long-term success warrant appropriate patient selection and rigorous preparation of the procedure during the pre-TAVI work-up. The aims of this work-up are several: validation of the indication, feasibility and safety of the procedure, selection of the prosthesis and of the route, anticipation of technical challenges. The CT-scan is the cornerstone of this assessment allowing for valve and vascular access appraisal. The geriatric evaluation remains important in the elderly, frail, high-risk patients. The assessment of cardiac and extracardiac comorbidities is systematic and may be incorporated into dedicated risk scores to improve the prediction of post-TAVI outcomes; this should be the basis of the decision-making process by the Heart Team.
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Affiliation(s)
- P Lantelme
- Service de cardiologie, hôpital Croix-Rousse et hôpital Lyon Sud, hospices civils de Lyon, 103, grande rue de la Croix-Rousse, 69004 Lyon, France; Université Lyon 1, CREATIS UMR5220, Inserm U1044, INSA-15, Lyon, France.
| | - B Harbaoui
- Service de cardiologie, hôpital Croix-Rousse et hôpital Lyon Sud, hospices civils de Lyon, 103, grande rue de la Croix-Rousse, 69004 Lyon, France; Université Lyon 1, CREATIS UMR5220, Inserm U1044, INSA-15, Lyon, France
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27
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Gauthier S, Tattevin P, Soulat L, Bouget J, Abergel S, Hascoet J, Mathieu R, Beuzit L, Myhie D, Revest M, Bensalah K, Peyronnet B. Pain intensity and imaging at the initial phase of acute pyelonephritis. Med Mal Infect 2019; 50:507-514. [PMID: 31387815 DOI: 10.1016/j.medmal.2019.07.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2017] [Revised: 02/12/2018] [Accepted: 07/15/2019] [Indexed: 01/08/2023]
Abstract
OBJECTIVE To identify predictive factors of urological complication on imaging findings in women with pyelonephritis aged 18 to 65 years. METHODS We performed an observational, retrospective, single-center study. The medical charts of women diagnosed with pyelonephritis at the emergency department from 2010 to 2015 were reviewed. Only patients who underwent an imaging study at the emergency department and with microbiologically confirmed pyelonephritis were included for analysis. The primary endpoint was the presence of urological complications on imaging findings. The secondary endpoint was treatment changes after imaging diagnosis. RESULTS Of the 193 women enrolled, 88 (45.6%) had urological complication(s) on imaging findings. The multivariate analysis revealed that history of urolithiasis (OR=2.41; P=0.01) and pain requiring morphine use (OR=5.29; P=0.009) were predictive of urological complications on imaging findings. Of the 120 women with uncomplicated pyelonephritis who underwent imaging studies, 45% had urological complication, resulting in a treatment change in 36.7% of patients. The multivariate analysis revealed that age>40 years (OR=4.58; P=0.02) and pain requiring morphine use (OR=3.78; P=0.02) were predictive of urological complication(s) on imaging findings and of treatment change based on imaging findings (OR=6.76; P=0.005 and OR=4.19; P=0.01 respectively) in this subgroup. CONCLUSIONS Pain requiring morphine use, age, and history of urolithiasis are independent predictors of urological complications on imaging findings in patients with acute pyelonephritis.
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Affiliation(s)
- S Gauthier
- Service d'accueil des urgences, université de Rennes 1, 35000 Rennes, France.
| | - P Tattevin
- Service de maladies infectieuses, université de Rennes 1, 35000 Rennes, France
| | - L Soulat
- Service d'accueil des urgences, université de Rennes 1, 35000 Rennes, France
| | - J Bouget
- Service d'accueil des urgences, université de Rennes 1, 35000 Rennes, France
| | - S Abergel
- Service d'accueil des urgences, université de Rennes 1, 35000 Rennes, France
| | - J Hascoet
- Service d'urologie, université de Rennes 1, 35000 Rennes, France
| | - R Mathieu
- Service d'urologie, université de Rennes 1, 35000 Rennes, France
| | - L Beuzit
- Service de radiologie, université de Rennes 1, 35000 Rennes, France
| | - D Myhie
- Département de médecine générale, université de Rennes 1, 35000 Rennes, France
| | - M Revest
- Service de maladies infectieuses, université de Rennes 1, 35000 Rennes, France
| | - K Bensalah
- Service d'urologie, université de Rennes 1, 35000 Rennes, France
| | - B Peyronnet
- Service d'urologie, université de Rennes 1, 35000 Rennes, France
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Tortajada-Genaro LA, Yamanaka ES, Maquieira Á. Consumer electronics devices for DNA genotyping based on loop-mediated isothermal amplification and array hybridisation. Talanta 2019; 198:424-431. [PMID: 30876582 DOI: 10.1016/j.talanta.2019.01.124] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2018] [Revised: 01/18/2019] [Accepted: 01/21/2019] [Indexed: 12/17/2022]
Abstract
Consumer electronic technologies offer practical performances to develop compact biosensing systems intended for the point-of-care testing of DNA biomarkers. Herein a discrimination method for detecting single nucleotide polymorphisms, based on isothermal amplification and on-chip hybridisation, was developed and integrated into user-friendly optical devices: e.g., USB digital microscope, flatbed scanner, smartphone and DVD drive. In order to adequately identify a single base change, loop-mediated isothermal amplification (LAMP) was employed, with high yields (8 orders) within 45 min. Subsequently, products were directly hybridised to the allele-specific probes attached to plastic chips in an array format. After colorimetric staining, four consumer electronic techniques were compared. Sensitive precise measurements were taken (high signal-to-noise ratios, 10-μm image resolution, 99% scan-to-scan reproducibility). These features confirmed their potential as analytical tools, are a competitive alternative to fluorescence scanners, and incorporate additional advantages, such as user-friendly interface and connectivity for telemedicine needs. The analytical performances of the integrated platform (assay and reader) in the human samples were also excellent, with a low detection limit (100 genomic DNA copies), and reproducible (<15%) and cheap assays (< 10 €/test). The correct genotyping of a genetic biomarker (single-nucleotide polymorphism located in the GRIK4 gene) was achieved as the assigned genotypes agreed with those determined by using sequencing. The portability, favourable discriminating and read-out capabilities reveal that the implementation of mass-produced low-cost devices into minimal-specialised clinical laboratories is closer to becoming a reality.
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Affiliation(s)
- Luis A Tortajada-Genaro
- Departamento de Química, Universitat Politècnica de València, Camino de Vera s/n, E46022 Valencia, Spain; Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Universitat Politècnica de València-Universitat de València, Valencia, Spain; Unidad Mixta UPV-La Fe, Nanomedicine and Sensors, IIS La Fe, Valencia, Spain.
| | - Eric Seiti Yamanaka
- Departamento de Química, Universitat Politècnica de València, Camino de Vera s/n, E46022 Valencia, Spain
| | - Ángel Maquieira
- Departamento de Química, Universitat Politècnica de València, Camino de Vera s/n, E46022 Valencia, Spain; Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Universitat Politècnica de València-Universitat de València, Valencia, Spain; Unidad Mixta UPV-La Fe, Nanomedicine and Sensors, IIS La Fe, Valencia, Spain
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Husain MAA, Hashim S, Zakaria N, Mohamed Zin MR. Development of underwater radiography scanner for reactor-pool experiment at the TRIGA PUSPATI reactor. MethodsX 2018; 5:1346-1363. [PMID: 30416978 PMCID: PMC6218652 DOI: 10.1016/j.mex.2018.10.011] [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: 08/06/2018] [Accepted: 10/10/2018] [Indexed: 11/01/2022] Open
Abstract
This paper describes the development of a custom-designed underwater scanner to support the experimental works for characterizing irradiated fuel stored in the TRIGA PUSPATI pool by means of radiography technique. Materials used to build the scanner are aluminum 6061, lead and teflon. Three main units that make up the scanner are rig structure, arm block and collimator. Collimator is designed to control radiation exposure by opening and closing the shutter. The experimental works were conducted underwater at 5-m depth hence water tightness is one of the main design criteria. Radiation in terms of gamma energy is captured by radiography film which after development and processing revealed the image of the radiation impact in terms of pixel and gray value. The film size used is 4in x 8in which was slot in the collimator. To validate the scanner, fuel element containing 8.5 wt% and 12 wt% enriched Uranium 235 were used. It was found that the experimental output is consistent with the fuel type and confirmed that the scanner is viable for fuel characterization study.
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Affiliation(s)
- Mohamad Annuar Assadat Husain
- Department of Physics, Faculty of Science, Universiti Teknologi Malaysia, 81310 UTM Skudai, Johor, Malaysia.,Atomic Energy Licensing Board, 43800 Dengkil, Selangor, Malaysia
| | - Suhairul Hashim
- Department of Physics, Faculty of Science, Universiti Teknologi Malaysia, 81310 UTM Skudai, Johor, Malaysia
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Abstract
Bronchiectasis are defined as an irreversible focal or diffuse dilatation of the bronchi and can be associated with significant morbidity. The prevalence is currently increasing, probably due to an increased use of thoracic computed tomography (CT). Indeed, the diagnosis relies on imaging and chest CT is the gold standard technique. The main diagnosis criterion is an increased bronchial diameter as compared to that of the companion artery. However, false positives are possible when the artery diameter is decreased, which is called pseudo-bronchiectasis. Other features such as the lack of bronchial tapering, and visibility of bronchi within 1cm of the pleural surface are also diagnostic criteria, and other CT features of bronchial disease are commonly seen. Thoracic imaging also allows severity assessment and long-term monitoring of structural abnormalities. The distribution pattern and the presence of associated findings on chest CT help identifying specific causes of bronchiectasis. Lung MRI and ultra-low dose CT and are promising imaging modalities that may play a role in the future. The objectives of this review are to describe imaging features for the diagnosis and severity assessment of bronchiectasis, to review findings suggesting the cause of bronchiectasis, and to present the new developments in bronchiectasis imaging.
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Affiliation(s)
- G Chassagnon
- Unité d'imagerie thoracique, groupe hospitalier Cochin-Broca-Hôtel-Dieu, AP-HP, 27, rue du Faubourg-Saint-Jacques, 75014 Paris, France.
| | - A-L Brun
- Unité d'imagerie thoracique, groupe hospitalier Cochin-Broca-Hôtel-Dieu, AP-HP, 27, rue du Faubourg-Saint-Jacques, 75014 Paris, France
| | - S Bennani
- Unité d'imagerie thoracique, groupe hospitalier Cochin-Broca-Hôtel-Dieu, AP-HP, 27, rue du Faubourg-Saint-Jacques, 75014 Paris, France
| | - N Chergui
- Unité d'imagerie thoracique, groupe hospitalier Cochin-Broca-Hôtel-Dieu, AP-HP, 27, rue du Faubourg-Saint-Jacques, 75014 Paris, France
| | - G Freche
- Unité d'imagerie thoracique, groupe hospitalier Cochin-Broca-Hôtel-Dieu, AP-HP, 27, rue du Faubourg-Saint-Jacques, 75014 Paris, France
| | - M-P Revel
- Unité d'imagerie thoracique, groupe hospitalier Cochin-Broca-Hôtel-Dieu, AP-HP, 27, rue du Faubourg-Saint-Jacques, 75014 Paris, France
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Ju Q, Li MX, Chen G, Wang HX, Shi QM, Ge X, Ding Z, Wang Q, Xu LC. Evaluation of the New Automatic Mycob.T Stainer and Scanner for Detecting Acid-fast Bacilli in China. Biomed Environ Sci 2018; 31:572-578. [PMID: 30231961 DOI: 10.3967/bes2018.078] [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] [Subscribe] [Scholar Register] [Received: 05/27/2018] [Accepted: 07/17/2018] [Indexed: 06/08/2023]
Abstract
OBJECTIVE To validate the performance of Mycob. T Stainer and Scanner (MTSS) for detecting acid-fast bacilli (AFB). METHODS A total of 3,816 sputum samples from 1,515 tuberculosis (TB) suspects were tested at the Anhui Provincial Chest Hospital and the Linyi People's Hospital from April-August, 2016. Each specimen was placed on two smear slides. One slide was stained by the ziehl-neelsen (ZN) method to be read by conventional microscopy (CM). The other slide was stained and scanned by MTSS. All specimens were decontaminated with 4% NaOH, and then inoculated into solid culture. The performance of MTSS was assessed. RESULTS MTSS produced higher average positivity rate (27.96%) as compared with the CM (26.83%). The overall sensitivity and specificity of MTSS were 78.9% and 93.9%, respectively. The sensitivity and specificity of CM was 77.4% and 95.0%, respectively. CONCLUSION MTSS exhibited a favorable performance in the detection of AFB. It may be an alternative to CM for screening TB.
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Affiliation(s)
- Qiang Ju
- Beijing Physical Examination Center, Beijing 100077, China
| | - Meng Xue Li
- National Center for Tuberculosis Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China
| | - Gang Chen
- Anhui Provincial Chest Hospital, Hefei 230022, Anhui, China
| | - Heng Xue Wang
- Shandong Provincial Chest Hospital, Jinan 250013, Shandong, China
| | - Qiao Mei Shi
- Anhui Provincial Chest Hospital, Hefei 230022, Anhui, China
| | - Xing Ge
- Linyi People's Hospital, Linyi 276003, Shandong, China
| | - Zhen Ding
- National Center for Tuberculosis Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China
| | - Qi Wang
- National Center for Tuberculosis Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China
| | - Li Chun Xu
- Beijing Physical Examination Center, Beijing 100077, China
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Tanaka Y, Inoue Y, Abe Y, Miyatake H, Hata H. Reliability of 3D arterial spin labeling MR perfusion measurements: The effects of imaging parameters, scanner model, and field strength. Clin Imaging 2018; 52:23-27. [PMID: 29510363 DOI: 10.1016/j.clinimag.2018.02.016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Revised: 02/05/2018] [Accepted: 02/20/2018] [Indexed: 10/17/2022]
Abstract
The aim of this study was to investigate the reliability of cerebral blood flow (CBF) measurements obtained by 3D pseudo-continuous arterial spin labeling (pCASL) imaging according to imaging parameters, scanner model, and field strength. We acquired 3D pCASL images in 12 healthy volunteers using four different scanners: two 3.0 T scanners and two 1.5 T scanners. Reliability was evaluated using intraclass correlation coefficient. Our results indicate that the influence of the post-labeling delay and scanner model on CBF measurements should be taken into consideration. If two scanners of the same model are used, scannerdependent differences may be small.
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Affiliation(s)
- Yoshihito Tanaka
- Department of Radiology, Kitasato University Hospital, Sagamihara, Kanagawa, Japan.
| | - Yusuke Inoue
- Department of Diagnostic Radiology, Kitasato University School of Medicine, Sagamihara, Kanagawa, Japan
| | - Yutaka Abe
- Department of Radiology, Kitasato University Hospital, Sagamihara, Kanagawa, Japan
| | - Hiroki Miyatake
- Department of Radiology, Kitasato University Hospital, Sagamihara, Kanagawa, Japan
| | - Hirofumi Hata
- Department of Radiology, Kitasato University Hospital, Sagamihara, Kanagawa, Japan
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Erus G, Doshi J, An Y, Verganelakis D, Resnick SM, Davatzikos C. Longitudinally and inter-site consistent multi-atlas based parcellation of brain anatomy using harmonized atlases. Neuroimage 2018; 166:71-78. [PMID: 29107121 PMCID: PMC5748021 DOI: 10.1016/j.neuroimage.2017.10.026] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Revised: 09/29/2017] [Accepted: 10/13/2017] [Indexed: 11/17/2022] Open
Abstract
As longitudinal and multi-site studies become increasingly frequent in neuroimaging, maintaining longitudinal and inter-scanner consistency of brain parcellation has become a major challenge due to variation in scanner models and/or image acquisition protocols across scanners and sites. We present a new automated segmentation method specifically designed to achieve a consistent parcellation of anatomical brain structures in such heterogeneous datasets. Our method combines a site-specific atlas creation strategy with a state-of-the-art multi-atlas anatomical label fusion framework. Site-specific atlases are computed such that they preserve image intensity characteristics of each site's scanner and acquisition protocol, while atlas pairs share anatomical labels in a way consistent with inter-scanner acquisition variations. This harmonization of atlases improves inter-study and longitudinal consistency of segmentations in the subsequent consensus labeling step. We tested this approach on a large sample of older adults from the Baltimore Longitudinal Study of Aging (BLSA) who had longitudinal scans acquired using two scanners that vary with respect to vendor and image acquisition protocol. We compared the proposed method to standard multi-atlas segmentation for both cross-sectional and longitudinal analyses. The harmonization significantly reduced scanner-related differences in the age trends of ROI volumes, improved longitudinal consistency of segmentations, and resulted in higher across-scanner intra-class correlations, particularly in the white matter.
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Affiliation(s)
- Guray Erus
- Center for Biomedical Image Computing and Analytics, University of Pennsylvania, Philadelphia, PA, USA.
| | - Jimit Doshi
- Center for Biomedical Image Computing and Analytics, University of Pennsylvania, Philadelphia, PA, USA
| | - Yang An
- Laboratory of Behavioral Neuroscience, National Institute on Aging, Baltimore, MD, USA
| | | | - Susan M Resnick
- Laboratory of Behavioral Neuroscience, National Institute on Aging, Baltimore, MD, USA
| | - Christos Davatzikos
- Center for Biomedical Image Computing and Analytics, University of Pennsylvania, Philadelphia, PA, USA
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Nuzzo A, Ronot M, Maggiori L, Joly F, Corcos O. [Abdominal pain of vascular cause]. Rev Med Interne 2018; 40:129-131. [PMID: 29307604 DOI: 10.1016/j.revmed.2017.12.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Revised: 11/05/2017] [Accepted: 12/11/2017] [Indexed: 12/21/2022]
Affiliation(s)
- A Nuzzo
- Structure d'urgences vasculaires intestinales (SURVI), hôpital Beaujon, AP-HP, 100, boulevard du Général-Leclerc, 92110 Clichy, France; Service de gastroentérologie, MICI, assistance nutritive, hôpital Beaujon, AP-HP, 100, boulevard du Général-Leclerc, 92110 Clichy, France; Université Paris Diderot, Sorbonne Paris Cité, 5, rue Thomas-Mann, 75013 Paris, France.
| | - M Ronot
- Structure d'urgences vasculaires intestinales (SURVI), hôpital Beaujon, AP-HP, 100, boulevard du Général-Leclerc, 92110 Clichy, France; Service de radiologie, hôpital Beaujon, AP-HP, 100, boulevard du Général-Leclerc, 92110 Clichy, France; Université Paris Diderot, Sorbonne Paris Cité, 5, rue Thomas-Mann, 75013 Paris, France
| | - L Maggiori
- Structure d'urgences vasculaires intestinales (SURVI), hôpital Beaujon, AP-HP, 100, boulevard du Général-Leclerc, 92110 Clichy, France; Service de chirurgie colorectale, hôpital Beaujon, AP-HP, 100, boulevard du Général-Leclerc, 92110 Clichy, France; Université Paris Diderot, Sorbonne Paris Cité, 5, rue Thomas-Mann, 75013 Paris, France
| | - F Joly
- Structure d'urgences vasculaires intestinales (SURVI), hôpital Beaujon, AP-HP, 100, boulevard du Général-Leclerc, 92110 Clichy, France; Service de gastroentérologie, MICI, assistance nutritive, hôpital Beaujon, AP-HP, 100, boulevard du Général-Leclerc, 92110 Clichy, France; Université Paris Diderot, Sorbonne Paris Cité, 5, rue Thomas-Mann, 75013 Paris, France
| | - O Corcos
- Structure d'urgences vasculaires intestinales (SURVI), hôpital Beaujon, AP-HP, 100, boulevard du Général-Leclerc, 92110 Clichy, France; Service de gastroentérologie, MICI, assistance nutritive, hôpital Beaujon, AP-HP, 100, boulevard du Général-Leclerc, 92110 Clichy, France; Université Paris Diderot, Sorbonne Paris Cité, 5, rue Thomas-Mann, 75013 Paris, France
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Abstract
Initial staging is a key part of the initial evaluation of non-small cell lung cancer. It relies on the 7th edition of the TNM classification. Proposals have been recently developed for the 8th edition of the classification, which is due to be enacted in early 2017. Among these proposals, the weight of tumor size has been increased and new N descriptors have been introduced to further describe N category depending on the number station involved. Regarding M descriptors, oligometastatic disease is distinguished from multiple distant extrathoracic metastases.
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Affiliation(s)
- G Chassagnon
- Radiologie A, groupe hospitalier Cochin-Hôtel Dieu, université Paris Descartes, 75014 Paris, France.
| | - S Bennani
- Radiologie A, groupe hospitalier Cochin-Hôtel Dieu, université Paris Descartes, 75014 Paris, France
| | - M-P Revel
- Radiologie A, groupe hospitalier Cochin-Hôtel Dieu, université Paris Descartes, 75014 Paris, France
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Alghazzawi TF, Al-Samadani KH, Lemons J, Liu PR, Essig ME, Bartolucci AA, Janowski GM. Effect of imaging powder and CAD/CAM stone types on the marginal gap of zirconia crowns. J Am Dent Assoc 2016; 146:111-20. [PMID: 25637209 DOI: 10.1016/j.adaj.2014.10.006] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2014] [Revised: 10/18/2014] [Accepted: 10/21/2014] [Indexed: 10/24/2022]
Abstract
OBJECTIVE To compare the marginal gap using different types of die stones and titanium dies with and without powders for imaging. METHODS A melamine tooth was prepared and scanned using a laboratory 3-shape scanner to mill a polyurethane die, which was duplicated into different stones (Jade, Lean, CEREC) and titanium. Each die was sprayed with imaging powders (NP, IPS, Optispray, Vita) to form 15 groups. Ten of each combination of stone/titanium and imaging powders were used to mill crowns. A light-bodied impression material was injected into the intaglio surface of each crown and placed on the corresponding die. Each crown was removed, and the monophase material was injected to form a monophase die, which was cut into 8 sections. Digital images were captured using a stereomicroscope to measure marginal gap. Scanning electron microscopy was used to determine the particle size and shape of imaging powders and stones. RESULTS Marginal gaps ranged from mean (standard deviation) 49.32 to 1.20 micrometers (3.97-42.41 μm). There was no statistical difference (P > .05) in the marginal gap by any combination of stone/titanium and imaging powders. All of the imaging powders had a similar size and rounded shape, whereas the surface of the stones showed different structures. CONCLUSIONS When a laboratory 3-shape scanner is used, all imaging powders performed the same for scanning titanium abutments. However, there was no added value related to the use of imaging powder on die stone. It is recommended that the selection of stone for a master cast be based on the hysical properties. PRACTICAL IMPLICATIONS When a laboratory 3-shape scanner is used, the imaging powder is not required for scanning die stone. Whenever scanning titanium implant abutments, select the least expensive imaging powder.
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Gueutier A, Paré A, Joly A, Laure B, de Pinieux G, Goga D. Rapid maxillary expansion in adults: Can multislice computed tomography help choose between orthopedic or surgical treatment? ACTA ACUST UNITED AC 2016; 117:327-334. [PMID: 27388783 DOI: 10.1016/j.revsto.2016.06.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2015] [Revised: 01/13/2016] [Accepted: 06/10/2016] [Indexed: 01/03/2023]
Abstract
INTRODUCTION The aim of this study was to evaluate the accuracy of Multislice Computed Tomography (MSCT) in the detection resistance areas on the midpalatal suture (MPS) and thus to evaluate if MSCT could be a help in the kind of maxillary expansion to be used (pure orthodontic or surgically-aided) for the correction of transverse maxillary deficiencies in adults. METHODS Ten MSCT were obtained from 10 MPS removed from fresh corpses (mean age: 79.4; extreme: 70-86). Three standardized radiological regions of interest (ROI) were identified on each MPS and were classified into "open" (group 1) or "closed" (group 2) by 3 independent radiologists. The 30 ROI were then histologically analyzed according to 3 criteria: mean suture width (MSW), obliteration index (OI) and interdigitation index (Ii). RESULTS Nine ROI were classified in group 1 (closed) and 21 in group 2 (open). On the histological examination, the mean MSW was 396.9μm in group 1 and 227.1μm in group 2. OI was 3.098% and 9.309% and Ii was 1.25 and 1.34 respectively. Statistically significant difference between the 2 groups was only found for the MSW. We conclude that MSCT allows for the evaluation of the width of the MPS, but not for the evaluation of the other possible parameters of resistance we used. Therefore, it cannot predict precisely the amount of résistance in the MPS and is not suited for the choice between pure orthodontic or surgically-aided expansion.
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Affiliation(s)
- A Gueutier
- CHU Trousseau, University Francois-Rabelais, Department of Maxillo Facial and Facial Plastic Surgery, Tours, France.
| | - A Paré
- CHU Trousseau, University Francois-Rabelais, Department of Maxillo Facial and Facial Plastic Surgery, Tours, France
| | - A Joly
- CHU Trousseau, University Francois-Rabelais, Department of Maxillo Facial and Facial Plastic Surgery, Tours, France
| | - B Laure
- CHU Trousseau, University Francois-Rabelais, Department of Maxillo Facial and Facial Plastic Surgery, Tours, France
| | - G de Pinieux
- CHU Trousseau, University Francois-Rabelais, Department of Pathology, Tours, France
| | - D Goga
- CHU Trousseau, University Francois-Rabelais, Department of Maxillo Facial and Facial Plastic Surgery, Tours, France
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Heran Dreyfus F, Galatoire O, Koskas P, Lafitte F, Nau E, Bergès O. [Orbito-palpebral vascular pathology]. J Fr Ophtalmol 2016; 39:804-13. [PMID: 27769582 DOI: 10.1016/j.jfo.2016.07.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Revised: 05/25/2016] [Accepted: 07/24/2016] [Indexed: 11/23/2022]
Abstract
Orbito-palpebral vascular pathology represents 10% of all the diseases of this area. The lesion may be discovered during a brain CT scan or MRI, or because it causes clinical symptoms such as orbital mass, visual or oculomotor alteration, pain, proptosis, or acute bleeding due to a complication of the lesion (hemorrhage, thrombosis). We present these lesions using an anatomical, clinical, imaging and therapeutic approach. We distinguish four different entities. Vascular tumors have common imaging characteristics (hypersignal on T2 sequence, contrast enhancement, abnormal vascularization well depicted with ultrasound and Doppler, and possible bleeding). The main lesions are cavernous hemangiomas, the most frequent lesion of that type during adulthood; infantile hemangiomas, the most frequent vascular tumor in children; and more seldomly, hemangioperitcytomas. True vascular malformations are divided according to their flow. Low flow lesions are venous (orbital varix), capillarovenous or lymphatic (lymphangioma). High flow malformations, more rare, are either arteriovenous or arterial malformations (aneurisms). Complex malformations include both low and high flow elements. Lesions leading to modifications of the orbito-palpebral blood flow are mainly due to cavernous sinus abnormalities, either direct carotid-cavernous fistula affecting young adults after severe head trauma, or dural fistula, more insidious, found in older adults. The last section is devoted to congenital syndromic vascular malformations (Sturge-Weber, Rendu-Olser…). This classification allows for a better understanding of these pathologies and their specific imaging features.
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Chassagnon G, Bennani S, Revel MP. [Computed tomography imaging of non-small cell lung cancer]. Cancer Radiother 2016; 20:694-8. [PMID: 27614518 DOI: 10.1016/j.canrad.2016.08.125] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2016] [Accepted: 08/02/2016] [Indexed: 12/25/2022]
Abstract
Computed tomography (CT) plays a key role in the initial evaluation of non-small cell lung cancer. It allows initial staging and helps targeting lesions for pathological analysis. The aim of initial imaging work-up is to differentiate between localized disease, eligible to a local treatment, and advanced disease requiring medical treatment. CT is very useful for the assessment of local extension but is less accurate than positron emission tomography (PET)-CT for the assessment of lymphatic and metastatic spread. However, initial staging should include CT examination of the brain and upper abdomen, and PET-CT should be only be performed in patients eligible to a local treatment after initial CT assessment. Propositions for the 8th edition of lung cancer TNM bring several changes for T staging. In particular, the weight of lesion size is increased. Similarly, N1 and N2 stages are now divided in subgroups according the number of involved stations.
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Aydi Z, Rachdi I, Ben Dhaou B, Dridi M, Daoud F, Baili L, Boussema F. [Epidemiological, clinical and evolutionary peculiarities of interstitial lung disease in systemic sclerosis]. Rev Pneumol Clin 2016; 72:122-128. [PMID: 26651932 DOI: 10.1016/j.pneumo.2015.09.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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: 01/30/2015] [Revised: 08/25/2015] [Accepted: 09/15/2015] [Indexed: 06/05/2023]
Abstract
Pulmonary involvement during systemic sclerosis (SS) is dominated by interstitial lung disease and arterial pulmonary hypertension. It is about a retrospective study analyzing 65 cases of SS over a period of 13 years. We compared cases with and without interstitial lung disease. The diagnosis of SS was retained according to American College of Rheumatology (ACR)/EULAR 2013 criteria. The diagnosis of interstitial lung disease was retained in TDM and EFR. Pulmonary hypertension is defined by a pulmonary arterial pression higher than 25 mmHg. The mean delay of diagnosis of interstitial lung disease and the diagnosis was of 48 months (extremes 0-78 months). The comparison between both groups according to average age of the patients, prevalence of pulmonary hypertension, frequency of Raynaud phenomenon and trophic disorders did not find any significant difference. Lung involvement was associated with an esophageal involvement in 71% of the cases (P=0.059). Antibodies anti-Scl 70 were noted more frequently in patient's with interstitial lung disease (79% of the cases, P=0.001). Patients were treated with colchicine and vitamin E. A corticotherapy had been indicated at a single patient. The evolution of SS was marked by the stabilisation of the restrictive syndrome in 71.8% of the cases and a worsening in 25% of the cases. Early and appropriate diagnosis of SS and screening of lung involvement are essential for a early care.
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Affiliation(s)
- Z Aydi
- Service de médecine interne, hôpital Habib Thameur, 8, rue Ali Ben Ayed, 1008 Montfleury, Tunisie
| | - I Rachdi
- Service de médecine interne, hôpital Habib Thameur, 8, rue Ali Ben Ayed, 1008 Montfleury, Tunisie
| | - B Ben Dhaou
- Service de médecine interne, hôpital Habib Thameur, 8, rue Ali Ben Ayed, 1008 Montfleury, Tunisie.
| | - M Dridi
- Service de médecine interne, hôpital Habib Thameur, 8, rue Ali Ben Ayed, 1008 Montfleury, Tunisie
| | - F Daoud
- Service de médecine interne, hôpital Habib Thameur, 8, rue Ali Ben Ayed, 1008 Montfleury, Tunisie
| | - L Baili
- Service de médecine interne, hôpital Habib Thameur, 8, rue Ali Ben Ayed, 1008 Montfleury, Tunisie
| | - F Boussema
- Service de médecine interne, hôpital Habib Thameur, 8, rue Ali Ben Ayed, 1008 Montfleury, Tunisie
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Matsuda T, Goto T, Kurahashi K, Kashiwabara T, Watanabe M, Tomotake Y, Nagao K, Ichikawa T. Digital assessment of preliminary impression accuracy for edentulous jaws: Comparisons of 3-dimensional surfaces between study and working casts. J Prosthodont Res 2016; 60:206-12. [PMID: 26822762 DOI: 10.1016/j.jpor.2015.12.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [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: 07/31/2015] [Revised: 12/17/2015] [Accepted: 12/24/2015] [Indexed: 11/18/2022]
Abstract
PURPOSE The aim of this study was to compare 3-dimensional surfaces of study and working casts for edentulous jaws and to evaluate the accuracy of preliminary impressions with a view to the future application of digital dentistry for edentulous jaws. METHODS Forty edentulous volunteers were serially recruited. Nine dentists took preliminary and final impressions in a routine clinical work-up. The study and working casts were digitized using a dental 3-dimensional scanner. The two surface images were superimposed through a least-square algorithm using imaging software and compared qualitatively. Furthermore, the surface of each jaw was divided into 6 sections, and the difference between the 2 images was quantitatively evaluated. RESULTS Overall inspection showed that the difference around residual ridges was small and that around borders were large. The mean differences in the upper and lower jaws were 0.26mm and 0.45mm, respectively. The maximum values of the differences showed that the upward change mainly occurred in the anterior residual ridge, and the downward change mainly in the posterior border seal, and the labial and buccal vestibules, whereas every border of final impression was shortened in the lower jaw. The accuracy in all areas except the border, which forms the foundation, was estimated to be less than 0.25mm. CONCLUSION Using digital technology, we here showed the overall and sectional accuracy of the preliminary impression for edentulous jaws. In our clinic, preliminary impressions have been made using an alginate material while ensuring that the requisite impression area was covered.
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Affiliation(s)
- Takashi Matsuda
- Department of Oral and Maxillofacial Prosthodontics, Institute of Biomedical Sciences, Tokushima University Graduate School, Japan
| | - Takaharu Goto
- Department of Oral and Maxillofacial Prosthodontics, Institute of Biomedical Sciences, Tokushima University Graduate School, Japan.
| | - Kosuke Kurahashi
- Department of Oral and Maxillofacial Prosthodontics, Institute of Biomedical Sciences, Tokushima University Graduate School, Japan
| | - Toshiya Kashiwabara
- Department of Oral and Maxillofacial Prosthodontics, Institute of Biomedical Sciences, Tokushima University Graduate School, Japan
| | - Megumi Watanabe
- Department of Oral and Maxillofacial Prosthodontics, Institute of Biomedical Sciences, Tokushima University Graduate School, Japan
| | | | - Kan Nagao
- Department of Oral and Maxillofacial Prosthodontics, Institute of Biomedical Sciences, Tokushima University Graduate School, Japan
| | - Tetsuo Ichikawa
- Department of Oral and Maxillofacial Prosthodontics, Institute of Biomedical Sciences, Tokushima University Graduate School, Japan
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Naha L, Nadour K, Iken M, Lmimouni B. [Allergic fungal rhinosinusitis]. J Mycol Med 2015; 25:293-6. [PMID: 26603100 DOI: 10.1016/j.mycmed.2015.09.007] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2015] [Revised: 09/21/2015] [Accepted: 09/21/2015] [Indexed: 11/30/2022]
Abstract
INTRODUCTION Definition, diagnosis and treatment of allergic fungal sinusitis remain difficult and controversial despite the increasing number of publications. We report a case of an allergic fungal sinusitis with a review of the literature. CLINICAL CASE A 45-year-old man consulted for sinusal polyposis resistant to steroid therapy, clinical examination objectified bilateral nasal polyps and covered with scabs. CT scan of the sinuses disclosed a sinuse filled with a tissue density material containing air with lysis of the left maxillary sinus, hypereosinophilia, the IgE levels were high. Finally, mycological investigation allowed the identification of Aspergillus fumigatus. The patient underwent total ethmoidectomy, histological study found an allergic mucin and inflammatory mucosa with numerous eosinophils. The postoperative course was good and the patient was given oral steroids. The clinical and radiological evolution was favorable without recurrence with a follow-up of three years. DISCUSSION A set of clinical, radiological, histopathological, immunoallergological and mycological criteria is necessary for precise diagnosis and to avoid fungal drift. The treatment is based on endoscopic surgery associated with corticosteroid.
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Affiliation(s)
- L Naha
- Service de parasitologie-mycologie, CeDoc faculté de Médecine et de Pharmacie Mohammed V, hôpital Militaire Mohammed V de Rabat, Rabat, Maroc.
| | - K Nadour
- Service d'ORL et CCF, hôpital Militaire Moulay Ismail de Meknès, Meknès, Maroc
| | - M Iken
- Service de parasitologie-mycologie, CeDoc faculté de Médecine et de Pharmacie Mohammed V, hôpital Militaire Mohammed V de Rabat, Rabat, Maroc
| | - B Lmimouni
- Service de parasitologie-mycologie, CeDoc faculté de Médecine et de Pharmacie Mohammed V, hôpital Militaire Mohammed V de Rabat, Rabat, Maroc
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Gaspoz F, Monnin P, Petter D, Plé J, Ding S. Precision and Accuracy of Measurements on CT Scout View. J Med Imaging Radiat Sci 2015; 46:309-16. [PMID: 31052138 DOI: 10.1016/j.jmir.2015.06.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2015] [Revised: 06/12/2015] [Accepted: 06/19/2015] [Indexed: 11/22/2022]
Abstract
OBJECTIVES The purposes of this study were to (1) investigate the limits of measurements on scout view in three computed tomography axes, x, y and z and (2) develop a model to provide better understanding of measurement accuracy. METHODS For the first objective, anteroposterior and lateral scout views of a Catphan phantom 200 mm in diameter and length were acquired with a GE scanner at 21 different table heights. Phantom measurements on scout view were performed by two experienced readers. The comparison of their measures provided estimation of precision. The accuracy was assessed by determining the bias, calculated as the difference between the values measured on scout view and the real phantom size. Second, a model was developed investigating the relationship between the dimensions of the object, its image, and the table height. This relationship was tested on our data. RESULTS Scout view measurements were precise, with less than 0.53% difference between readers. In addition, small biases of about 1 mm were detected in the z-axis, whatever the table height. In the other axes, serious biases from -13 to +73 mm were measured. Furthermore, at isocentre, overestimations up to 7 mm were shown. The results also indicated that biases in scout view measurements are because of the geometrical projection related to the object-detector distance. CONCLUSIONS Measurements in the table movement axis are precise and accurate, conferring to scout views an added value for preoperative planning in orthopedic surgery.
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Sarda-Quarello L, Tuchtan L, Bartoli C, Bourlière-Najean B, Petit P, Sigaudy S, Piercecchi-Marti MD, Gorincour G. [Post-mortem perinatal imaging: State of the art and perspectives, with an emphasis on ultrasound]. ACTA ACUST UNITED AC 2015; 43:612-5. [PMID: 26297165 DOI: 10.1016/j.gyobfe.2015.07.020] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2015] [Accepted: 07/21/2015] [Indexed: 11/16/2022]
Abstract
The fields of application of post-mortem imaging have been exponentially growing for 10 years. Its potential to identify the cause of death in trauma and ballistic cases is now properly documented. In pediatric and perinatal practice, large significant series are less available, except for MRI and central nervous system analysis where scientific evidence is now robust. After a short historical and state-of-the-art review, we will try to depict the way we see the future of this sub-specialty of post-mortem imaging, especially in specific perinatal situations.
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Affiliation(s)
- L Sarda-Quarello
- Service d'anatomopathologie, hôpital de la Timone, 264, rue Saint-Pierre, 13005 Marseille, France; Centre pluridisciplinaire de diagnostic prénatal, hôpital de la Timone-Enfants, 264, rue Saint-Pierre, 13005 Marseille, France
| | - L Tuchtan
- Service de médecine légale, hôpital de la Timone, 264, rue Saint-Pierre, 13005 Marseille, France
| | - C Bartoli
- Service de médecine légale, hôpital de la Timone, 264, rue Saint-Pierre, 13005 Marseille, France
| | - B Bourlière-Najean
- Service d'imagerie pédiatrique et prénatale, hôpital de la Timone-Enfants, 264, rue Saint-Pierre, 13005 Marseille, France
| | - P Petit
- Service d'imagerie pédiatrique et prénatale, hôpital de la Timone-Enfants, 264, rue Saint-Pierre, 13005 Marseille, France
| | - S Sigaudy
- Centre pluridisciplinaire de diagnostic prénatal, hôpital de la Timone-Enfants, 264, rue Saint-Pierre, 13005 Marseille, France
| | - M-D Piercecchi-Marti
- Service de médecine légale, hôpital de la Timone, 264, rue Saint-Pierre, 13005 Marseille, France
| | - G Gorincour
- Centre pluridisciplinaire de diagnostic prénatal, hôpital de la Timone-Enfants, 264, rue Saint-Pierre, 13005 Marseille, France; Service d'imagerie pédiatrique et prénatale, hôpital de la Timone-Enfants, 264, rue Saint-Pierre, 13005 Marseille, France; Laboratoire d'imagerie interventionnelle et expérimentale, CERIMED, Aix-Marseille université, 13005 Marseille, France.
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Passaretti Filho J, da Silveira Petruci JF, Cardoso AA. Development of a simple method for determination of NO₂ in air using digital scanner images. Talanta 2015; 140:73-80. [PMID: 26048826 DOI: 10.1016/j.talanta.2015.03.009] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2014] [Revised: 03/03/2015] [Accepted: 03/05/2015] [Indexed: 12/01/2022]
Abstract
Nitrogen dioxide (NO2) is an important indicator of atmospheric pollution that is mainly derived from combustion processes. The gas is often present at undesirable levels in both open and closed environments worldwide, requiring monitoring under a variety of different conditions. This work describes the development of a sensitive, selective, and inexpensive method for the determination of NO2 in gaseous samples. The method is based on the processing of digital images of the product of the Griess-Saltzman (GS) colorimetric reaction. NO2 was collected and pre-concentrated using C-18 cartridges impregnated with triethanolamine, followed by elution with 5% methanol solution. The reaction for formation of the colored product only required 300 μL volumes of sample containing reagent, minimizing the generation of chemical wastes. Calibrations using standard atmospheres showed that it was possible to measure NO2 in a concentration range from 5.1 to 100.0 ppb (9.4-188.0 µg m(-3)), using a sampling flow rate of 0.50 L min(-1) and a collection time of 60 min. The limit of detection achieved with a solution volume of 300 μL was 5.0 ppb (9.6 µg m(-3)), with a relative error of 2% and a coefficient of variation of 1.6%.
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Affiliation(s)
- Juliano Passaretti Filho
- Department of Analytical Chemistry, São Paulo State University-UNESP, CEP 14800-970 Araraquara, SP, Brazil
| | | | - Arnaldo Alves Cardoso
- Department of Analytical Chemistry, São Paulo State University-UNESP, CEP 14800-970 Araraquara, SP, Brazil.
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de Sainte Marie B, Coze S, Grégoire E, Jean R, Durand JM, Chiche L. [Sudden epigastric pain]. Rev Med Interne 2015; 36:634-5. [PMID: 25819071 DOI: 10.1016/j.revmed.2015.02.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2014] [Revised: 02/09/2015] [Accepted: 02/18/2015] [Indexed: 02/07/2023]
Affiliation(s)
- B de Sainte Marie
- Service de médecine interne, CHU de la Timone, Aix-Marseille université, 264, rue Saint-Pierre, 13005 Marseille, France
| | - S Coze
- Service de radiologie, CHU de la Conception, Aix-Marseille université, 147, boulevard Baille, 13005 Marseille, France
| | - E Grégoire
- Service de chirurgie digestive, CHU de la Timone, Aix-Marseille université, 147, boulevard Baille, 13005 Marseille, France
| | - R Jean
- Service de médecine interne, CHU de la Timone, Aix-Marseille université, 264, rue Saint-Pierre, 13005 Marseille, France
| | - J-M Durand
- Service de médecine interne, CHU de la Timone, Aix-Marseille université, 264, rue Saint-Pierre, 13005 Marseille, France
| | - L Chiche
- Service de médecine interne, CHU de la Timone, Aix-Marseille université, 264, rue Saint-Pierre, 13005 Marseille, France.
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Tollard E, Perot G, Clavier E, Gerardin E. Imaging of giant cerebral aneurysms. Neurochirurgie 2014; 61:378-84. [PMID: 24698745 DOI: 10.1016/j.neuchi.2013.10.124] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2013] [Revised: 10/05/2013] [Accepted: 10/19/2013] [Indexed: 11/16/2022]
Abstract
The aim of this study was to review the different imaging techniques for analysing giant intracranial aneurysms (digital subtraction angiography [DSA], magnetic resonance imaging [MRI], computed tomography [CT]) imaging and explain their respective contribution to the understanding of the characteristics of these complex aneurysms. Giant aneurysms have a complex pathology with multiple stages of evolution and consequences. Therefore, complex imaging is mandatory to enhance the understanding of these parameters and to plan an often complicated treatment strategy. DSA remains the gold standard for analysing aneurysms, but non-invasive sectional imaging (CT, MRI) also provides essential information in the specific case of giant aneurysms.
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Affiliation(s)
- E Tollard
- Department of Neuroradiology, Rouen University Hospital, 1, rue de Germont, 76031 Rouen cedex, France.
| | - G Perot
- Department of Neuroradiology, Rouen University Hospital, 1, rue de Germont, 76031 Rouen cedex, France
| | - E Clavier
- Department of Neuroradiology, Rouen University Hospital, 1, rue de Germont, 76031 Rouen cedex, France
| | - E Gerardin
- Department of Neuroradiology, Rouen University Hospital, 1, rue de Germont, 76031 Rouen cedex, France; INSERM U982, Rouen University Hospital, Rouen, France
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