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[PMID]:26371869
[Au] Autor:Stegeman SA; de Witte PB; Boonstra S; de Groot JH; Nagels J; Krijnen P; Schipper IB
[Ad] Endereço:Department of Surgery-Trauma Surgery, Leiden University Medical Center, P.O. Box 9600, 2300 RC Leiden, The Netherlands. Electronic address: s.a.stegeman@lumc.nl.
[Ti] Título:Measurement of clavicular length and shortening after a midshaft clavicular fracture: Spatial digitization versus planar roentgen photogrammetry.
[So] Source:J Electromyogr Kinesiol;29:74-80, 2016 Aug.
[Is] ISSN:1873-5711
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:PURPOSE: Clavicular shortening after fracture is deemed prognostic for clinical outcome and is therefore generally assessed on radiographs. It is used for clinical decision making regarding operative or non-operative treatment in the first 2weeks after trauma, although the reliability and accuracy of the measurements are unclear. This study aimed to assess the reliability of roentgen photogrammetry (2D) of clavicular length and shortening, and to compare these with 3D-spatial digitization measurements, obtained with an electromagnetic recording system (Flock of Birds). PATIENTS AND METHODS: Thirty-two participants with a consolidated non-operatively treated two or multi-fragmented dislocated midshaft clavicular fracture were analysed. Two observers measured clavicular lengths and absolute and proportional clavicular shortening on radiographs taken before and after fracture consolidation. The clavicular lengths were also measured with spatial digitization. Inter-observer agreement on the radiographic measurements was assessed using the Intraclass Correlation Coefficient (ICC). Agreement between the radiographic and spatial digitization measurements was assessed using a Bland-Altman plot. RESULTS: The inter-observer agreement on clavicular length, and absolute and proportional shortening on trauma radiographs was almost perfect (ICC>0.90), but moderate for absolute shortening after consolidation (ICC=0.45). The Bland-Altman plot compared measurements of length on AP panorama radiographs with spatial digitization and showed that planar roentgen photogrammetry resulted in up to 37mm longer and 34mm shorter measurements than spatial digitization. CONCLUSION: Measurements of clavicular length on radiographs are highly reliable between observers, but may not reflect the actual length and shortening of the clavicle when compared to length measurements with spatial digitization. We recommend to use proportional shortening when measuring clavicular length or shortening on radiographs for clinical decision making.
[Mh] Termos MeSH primário: Clavícula/diagnóstico por imagem
Clavícula/lesões
Fraturas Ósseas/diagnóstico por imagem
Fotogrametria/métodos
[Mh] Termos MeSH secundário: Adulto
Clavícula/fisiologia
Eletroquimografia/métodos
Eletroquimografia/normas
Feminino
Seres Humanos
Masculino
Meia-Idade
Músculo Esquelético/diagnóstico por imagem
Músculo Esquelético/fisiologia
Variações Dependentes do Observador
Fotogrametria/normas
Radiografia/métodos
Radiografia/normas
Reprodutibilidade dos Testes
[Pt] Tipo de publicação:CLINICAL TRIAL; COMPARATIVE STUDY; JOURNAL ARTICLE; OBSERVATIONAL STUDY
[Em] Mês de entrada:1704
[Cu] Atualização por classe:170817
[Lr] Data última revisão:
170817
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150916
[St] Status:MEDLINE


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[PMID]:24737660
[Au] Autor:Sun J; He H; Liu S
[Ad] Endereço:College of Science, Northwest A&F University, Yangling, China.
[Ti] Título:Determination of phthalic acid esters in Chinese white spirit using dispersive liquid-liquid microextraction coupled with sweeping ß-cyclodextrin-modified micellar electrokinetic chromatography.
[So] Source:J Sep Sci;37(13):1679-86, 2014 Jul.
[Is] ISSN:1615-9314
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:A simple method that consumes low organic solvent is proposed for the analysis of phthalic acid esters in Chinese white spirit using dispersive liquid-liquid microextraction coupled with sweeping-micellar electrokinetic chromatography. Tetrachloromethane and white-spirit-containing ethanol were used as the extraction and dispersing solvents, respectively. The electrophoresis separation buffer was composed of 5 mM ß-cyclodextrin, 50 mM sodium dodecyl sulfate and 25 mM borate buffer (pH 9.2) with 9% acetonitrile, enabling the baseline resolution of the analytes within 13 min. Under the optimum conditions, satisfactory linearities (5-1000 ng/mL, r ≥ 0.9909), good reproducibility (RSD ≤ 6.7% for peak area, and RSD ≤ 2.8% for migration time), low detection limits (0.4-0.8 ng/mL) and acceptable recovery rates (89.6-105.7%) were obtained. The proposed method was successfully applied to 22 Chinese white spirits, and the content of dibutyl phthalate in 55% of the samples exceeded the Specific Migration Limit of 0.3 mg/kg established by the domestic and international regulations.
[Mh] Termos MeSH primário: Bebidas/análise
Eletroquimografia/métodos
Ésteres/análise
Ésteres/isolamento & purificação
Microextração em Fase Líquida/métodos
Ácidos Ftálicos/análise
Ácidos Ftálicos/isolamento & purificação
[Mh] Termos MeSH secundário: Eletroquimografia/instrumentação
Contaminação de Alimentos/análise
[Pt] Tipo de publicação:EVALUATION STUDIES; JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Esters); 0 (Phthalic Acids)
[Em] Mês de entrada:1505
[Cu] Atualização por classe:140701
[Lr] Data última revisão:
140701
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:140417
[St] Status:MEDLINE
[do] DOI:10.1002/jssc.201400118


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[PMID]:21330183
[Au] Autor:Mukherjee A; Jenkins B; Fang C; Radke RJ; Banker G; Roysam B
[Ad] Endereço:Department of Electrical, Computer and Systems Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180, USA.
[Ti] Título:Automated kymograph analysis for profiling axonal transport of secretory granules.
[So] Source:Med Image Anal;15(3):354-67, 2011 Jun.
[Is] ISSN:1361-8423
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:This paper describes an automated method to profile the velocity patterns of small organelles (BDNF granules) being transported along a selected section of axon of a cultured neuron imaged by time-lapse fluorescence microscopy. Instead of directly detecting the granules as in conventional tracking, the proposed method starts by generating a two-dimensional spatio-temporal map (kymograph) of the granule traffic along an axon segment. Temporal sharpening during the kymograph creation helps to highlight granule movements while suppressing clutter due to stationary granules. A voting algorithm defined over orientation distribution functions is used to refine the locations and velocities of the granules. The refined kymograph is analyzed using an algorithm inspired from the minimum set cover framework to generate multiple motion trajectories of granule transport paths. The proposed method is computationally efficient, robust to significant levels of noise and clutter, and can be used to capture and quantify trends in transport patterns quickly and accurately. When evaluated on a collection of image sequences, the proposed method was found to detect granule movement events with 94% recall rate and 82% precision compared to a time-consuming manual analysis. Further, we present a study to evaluate the efficacy of velocity profiling by analyzing the impact of oxidative stress on granule transport in which the fully automated analysis correctly reproduced the biological conclusion generated by manual analysis.
[Mh] Termos MeSH primário: Algoritmos
Axônios/metabolismo
Eletroquimografia/métodos
Interpretação de Imagem Assistida por Computador/métodos
Microscopia de Fluorescência/métodos
Microscopia de Vídeo/métodos
Vesículas Secretórias/metabolismo
[Mh] Termos MeSH secundário: Animais
Transporte Biológico Ativo/fisiologia
Células Cultivadas
Aumento da Imagem/métodos
Camundongos
Reprodutibilidade dos Testes
Sensibilidade e Especificidade
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, N.I.H., EXTRAMURAL; RESEARCH SUPPORT, NON-U.S. GOV'T
[Em] Mês de entrada:1108
[Cu] Atualização por classe:160902
[Lr] Data última revisão:
160902
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:110219
[St] Status:MEDLINE
[do] DOI:10.1016/j.media.2010.12.005


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[PMID]:20734964
[Au] Autor:Kimura M; Imagawa H; Nito T; Sakakibara K; Chan RW; Tayama N
[Ad] Endereço:Department of Otolaryngology-Head and Neck Surgery, Biomedical Engineering, University of Texas Southwestern Medical Center, Dallas, Texas 75390-9035, USA.
[Ti] Título:Arytenoid adduction for correcting vocal fold asymmetry: high-speed imaging.
[So] Source:Ann Otol Rhinol Laryngol;119(7):439-46, 2010 Jul.
[Is] ISSN:0003-4894
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:OBJECTIVES: We hypothesized that high-speed digital imaging provides a quantitative method to evaluate the effect of arytenoid adduction for the correction of asymmetric and irregular vocal fold vibration in unilateral vocal fold paralysis. METHODS: Six subjects with unilateral vocal fold paralysis participated in the study (4 male, 2 female; mean [-SD] age, 52.5 +/- 21.3 years). Videokymographic and laryngotopographic methods for image analysis were performed for high-speed recordings of vocal fold vibration for visualizing the glottal vibratory patterns, and for quantifying the frequency of vibration of each vocal fold, respectively. Comparisons of the paralyzed and the normal vocal folds were made before and after arytenoid adduction. RESULTS: Analysis of the laryngotopographs revealed 2 distinct frequencies of vibration for the paralyzed and the contralateral vocal folds for all subjects before surgery. After arytenoid adduction, the vibration frequencies became identical or nearly identical in all subjects. CONCLUSIONS: Asymmetric vibration in vocal fold paralysis was exemplified by differences in vibration frequency between the vocal folds. The present data showed that after arytenoid adduction the vibration frequencies and the vibratory patterns of the contralateral vocal folds approached symmetry. This surgical procedure could improve the functional symmetry of the larynx for phonation.
[Mh] Termos MeSH primário: Cartilagem Aritenoide/cirurgia
Processamento de Imagem Assistida por Computador
Paralisia das Pregas Vocais/cirurgia
[Mh] Termos MeSH secundário: Adulto
Idoso
Eletroquimografia
Feminino
Seres Humanos
Masculino
Meia-Idade
Vibração
Paralisia das Pregas Vocais/fisiopatologia
Prega Vocal/fisiopatologia
Adulto Jovem
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, N.I.H., EXTRAMURAL; RESEARCH SUPPORT, NON-U.S. GOV'T
[Em] Mês de entrada:1009
[Cu] Atualização por classe:170214
[Lr] Data última revisão:
170214
[Sb] Subgrupo de revista:AIM; IM
[Da] Data de entrada para processamento:100826
[St] Status:MEDLINE


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[PMID]:20463479
[Au] Autor:Deliyski DD; Hillman RE
[Ad] Endereço:Department of Communication Sciences and Disorders, University of South Carolina, Columbia, South Carolina 29208, USA. ddeliyski@sc.edu
[Ti] Título:State of the art laryngeal imaging: research and clinical implications.
[So] Source:Curr Opin Otolaryngol Head Neck Surg;18(3):147-52, 2010 Jun.
[Is] ISSN:1531-6998
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:PURPOSE OF REVIEW: This study provides a review of the latest advances in videostroboscopy, videokymography and high-speed videoendoscopy, and outlines the development of new laryngeal imaging modalities based on optical coherence tomography, laser-depth kymography, and magnetic resonance imaging (MRI), published in the past 2 years. RECENT FINDINGS: Videostroboscopy and videokymography: Image quality has improved and several image processing and measurement techniques have been published. High-speed videoendoscopy: Significant progress has been made through increased sensitivity and frame rates of the cameras, and the development of facilitative playbacks, phonovibrography and several image segmentation and measurement methods. Clinical evidence was presented through applications in phonosurgery, comparisons with videostroboscopy, normative data, and better understanding of voice production. Optical coherence tomography: Latest developments allow the capture of dynamic high-resolution cross-sectional images of the vibrating vocal fold mucosa during phonation. Depth kymography: New laser technique allowing recording of the vertical movements of the vocal folds during phonation in calibrated spatial values. Laryngeal magnetic resonance: New methods allow high-resolution imaging of laryngeal tissue microstructure, or measuring of dynamic laryngeal structures during phonation. SUMMARY: The endoscopic laryngeal imaging techniques have made significant advances increasing their clinical value, whereas techniques providing new types of potentially clinically relevant information have emerged.
[Mh] Termos MeSH primário: Eletroquimografia/métodos
Doenças da Laringe/diagnóstico
Laringoscopia/métodos
Imagem por Ressonância Magnética
Gravação de Videoteipe
[Mh] Termos MeSH secundário: Disfonia/diagnóstico
Seres Humanos
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, N.I.H., EXTRAMURAL; RESEARCH SUPPORT, NON-U.S. GOV'T; REVIEW
[Em] Mês de entrada:1504
[Cu] Atualização por classe:161122
[Lr] Data última revisão:
161122
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:100514
[St] Status:MEDLINE
[do] DOI:10.1097/MOO.0b013e3283395dd4


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[PMID]:19618198
[Au] Autor:Verikas A; Uloza V; Bacauskiene M; Gelzinis A; Kelertas E
[Ad] Endereço:Intelligent Systems Laboratory, Halmstad University, Box 823, 301 18, Halmstad, Sweden. antanas.verikas@hh.se
[Ti] Título:Advances in laryngeal imaging.
[So] Source:Eur Arch Otorhinolaryngol;266(10):1509-20, 2009 Oct.
[Is] ISSN:1434-4726
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:Imaging and image analysis became an important issue in laryngeal diagnostics. Various techniques, such as videostroboscopy, videokymography, digital kymography, or ultrasonography are available and are used in research and clinical practice. This paper reviews recent advances in imaging for laryngeal diagnostics.
[Mh] Termos MeSH primário: Diagnóstico por Imagem/métodos
Doenças da Laringe/diagnóstico
Neoplasias Laríngeas/diagnóstico
[Mh] Termos MeSH secundário: Eletroquimografia/métodos
Glote/patologia
Seres Humanos
Processamento de Imagem Assistida por Computador/métodos
Doenças da Laringe/patologia
Neoplasias Laríngeas/patologia
Laringoscopia/métodos
Laringe/patologia
Tamanho do Órgão
Intensificação de Imagem Radiográfica/métodos
Sensibilidade e Especificidade
Estroboscopia/métodos
Gravação em Vídeo/métodos
Prega Vocal/patologia
[Pt] Tipo de publicação:COMPARATIVE STUDY; JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T; REVIEW
[Em] Mês de entrada:0912
[Cu] Atualização por classe:170928
[Lr] Data última revisão:
170928
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:090721
[St] Status:MEDLINE
[do] DOI:10.1007/s00405-009-1050-4


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[PMID]:19501118
[Au] Autor:Pajak B; Songin M; Strosznajder JB; Gajkowska B
[Ad] Endereço:Department of Cell Ultrastructure, Mossakowski Medical Research Centre, Polish Academy of Sciences, Pawinskiego 5, 02-106 Warsaw, Poland. bepaj@wp.pl
[Ti] Título:Alzheimer's disease genetic mutation evokes ultrastructural alterations: correlation to an intracellular Abeta deposition and the level of GSK-3beta-P(Y216) phosphorylated form.
[So] Source:Neurotoxicology;30(4):581-8, 2009 Jul.
[Is] ISSN:1872-9711
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:Herein we demonstrate that PC12 cells, which overexpress human wild-type amyloid-beta precursor protein (AbetaPPwt) or AbetaPP bearing double Swedish mutation (AbetaPPsw), reveal phenotype characteristic for Alzheimer's disease (AD). The examination of cell ultrastructure showed the presence of peptide aggregates within the cells, activation of endosomal-lysosomal system and extensive exocytosis. Furthermore, the autophagy induction was also characteristic hallmark of amyloid-beta-induced cytotoxicity. Morphological changes were positively correlated with the extent of phosphorylated glycogen synthase kinase-3beta (phospho-Tyr(216)-GSK-3beta, GSK-3beta-P(Y216)). The activity of GSK-3beta is believed to cause tau protein hyper-phosphorylation, increased amyloid-beta production and local plaque-associated microglial-mediated inflammatory responses. All of them are symptomatic for AD. In our studies, the highly significant Y216 phosphorylation and over-expression of total GSK-3beta were observed in AbetaPPsw-transfected PC12 cells. In addition, the immuocytochemical analysis showed co-localization of GSK-3beta-P(Y216) and amyloid-beta deposits. Thus, our data support a functional role of GSK-3beta in AbetaPP processing, further implicating this kinase in the amyloid-beta-dependent pathogenesis.
[Mh] Termos MeSH primário: Peptídeos beta-Amiloides/metabolismo
Precursor de Proteína beta-Amiloide/genética
Quinase 3 da Glicogênio Sintase/metabolismo
Mutação
Tirosina/metabolismo
[Mh] Termos MeSH secundário: Peptídeos beta-Amiloides/genética
Animais
Autofagia/genética
Eletroquimografia
Endossomos/metabolismo
Endossomos/ultraestrutura
Glicogênio Sintase Quinase 3 beta
Seres Humanos
Lisossomos/metabolismo
Lisossomos/ultraestrutura
Microscopia Imunoeletrônica/métodos
Células PC12/metabolismo
Células PC12/ultraestrutura
Fosforilação/genética
Ratos
Frações Subcelulares/metabolismo
Transfecção/métodos
Tirosina/genética
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Amyloid beta-Peptides); 0 (Amyloid beta-Protein Precursor); 42HK56048U (Tyrosine); EC 2.7.11.1 (GSK3B protein, human); EC 2.7.11.1 (Glycogen Synthase Kinase 3 beta); EC 2.7.11.1 (Gsk3b protein, rat); EC 2.7.11.26 (Glycogen Synthase Kinase 3)
[Em] Mês de entrada:0910
[Cu] Atualização por classe:161125
[Lr] Data última revisão:
161125
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:090609
[St] Status:MEDLINE
[do] DOI:10.1016/j.neuro.2009.05.008


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[PMID]:18757249
[Au] Autor:Zaaimi B; Grebe R; Wallois F
[Ad] Endereço:GRAMFC, Faculté de Médecine, Amiens, France. boubker.zaaimi@u-picardie.fr
[Ti] Título:Animal model of the short-term cardiorespiratory effects of intermittent vagus nerve stimulation.
[So] Source:Auton Neurosci;143(1-2):20-6, 2008 Dec 05.
[Is] ISSN:1872-7484
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:PURPOSE: To develop an animal model of the effects of vagus nerve stimulation (VNS) on heart rate and respiration in studies of seizure treatment. METHODS: Nine rats implanted with ECG, EMG, and VNS electrodes and pulse generator were stimulated with 81 different sets of parameters while they slept in a plethysmographic box. RESULT: From cardiorespiratory effects of VNS, an index (alpha) was found to distinguish between weak and strong VNS doses. Weak VNS dose induced an increase in respiratory frequency and no significant change in heart rate. The effect of VNS on respiration, similar to that observed in children, can be divided into 3 phases. Strong VNS dose induced a decrease in respiratory frequency concomitant with a decrease in heart rate. Increasing the intensity of the VNS induced a proportional increase in the maximal inspiratory strength. CONCLUSION: Various VNS parameter settings induce different and concomitant cardiorespiratory variations in conscious sleeping rats. These effects correlate with the intensity of the VNS parameters. Understanding the effects of the intensity of VNS parameters may allow for further optimization of VNS parameters in patients receiving VNS.
[Mh] Termos MeSH primário: Frequência Cardíaca/fisiologia
Fenômenos Fisiológicos Respiratórios
Estimulação do Nervo Vago/métodos
Nervo Vago/fisiologia
[Mh] Termos MeSH secundário: Animais
Eletrocardiografia/métodos
Eletrocardiografia/estatística & dados numéricos
Eletrodos Implantados
Eletroquimografia/métodos
Eletroquimografia/estatística & dados numéricos
Masculino
Modelos Animais
Ratos
Ratos Sprague-Dawley
Convulsões/fisiopatologia
Convulsões/terapia
Fatores de Tempo
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Em] Mês de entrada:0902
[Cu] Atualização por classe:090812
[Lr] Data última revisão:
090812
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:080902
[St] Status:MEDLINE
[do] DOI:10.1016/j.autneu.2008.07.002


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[PMID]:18177164
[Au] Autor:Svec JG; Sundberg J; Hertegård S
[Ad] Endereço:Groningen Voice Research Laboratory, Department of Biomedical Engineering, University Medical Center Groningen, University of Groningen, Antonius Deusinglaan 1, NL 9713 AV Groningen, The Netherlands. svecjan@vol.cz
[Ti] Título:Three registers in an untrained female singer analyzed by videokymography, strobolaryngoscopy and sound spectrography.
[So] Source:J Acoust Soc Am;123(1):347-53, 2008 Jan.
[Is] ISSN:1520-8524
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:There has been a lack of objective data on the singing voice registers, particularly on the so called "whistle" register, occurring in the top part of the female pitch range, which is accessible only to some singers. This study offers unique strobolaryngoscopic and high-speed (7812.5 imagess) videokymographic data on the vocal fold behavior of an untrained female singer capable of producing three distinct voice qualities, i.e., the chest, head and whistle registers. The sound was documented spectrographically. The transition from chest to head register, accompanied by pitch jumps, occurred around tones B4-C#5 (500-550 Hz) and was found to be associated with a slight decrease in arytenoids adduction, resulting in decrease of the closed quotient. The register shifts from head to whistle, also accompanied by pitch jumps, occurred around tones E5-B5 (670-1000 Hz) without any noticeable changes in arytenoids adduction. Some evidence was found for the vocal tract influence on this transition. The mechanism of the vocal fold vibration in whistle register was found principally similar to that at lower registers: vibrations along the whole glottal length and vertical phase differences (indicated by sharp lateral peaks in videokymography) were seen on the vocal folds up to the highest tone G6 (1590 Hz).
[Mh] Termos MeSH primário: Laringoscopia/métodos
Fonação/fisiologia
Competência Profissional
Espectrografia do Som/métodos
Medida da Produção da Fala
Fala/fisiologia
Gravação de Videoteipe
[Mh] Termos MeSH secundário: Eletroquimografia/instrumentação
Feminino
Seres Humanos
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Em] Mês de entrada:0801
[Cu] Atualização por classe:080107
[Lr] Data última revisão:
080107
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:080108
[St] Status:MEDLINE
[do] DOI:10.1121/1.2804939


  10 / 544 MEDLINE  
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[PMID]:18008075
[Au] Autor:Ertel D; Pflederer T; Achenbach S; Kachelriess M; Steffen P; Kalender WA
[Ad] Endereço:Institute of Medical Physics (IMP), University of Erlangen-Nürnberg, Henkestrasse 91, 91052 Erlangen, Germany.
[Ti] Título:Validation of a raw data-based synchronization signal (kymogram) for phase-correlated cardiac image reconstruction.
[So] Source:Eur Radiol;18(2):253-62, 2008 Feb.
[Is] ISSN:0938-7994
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:Phase-correlated reconstruction is commonly used in computed tomography (CT)-based cardiac imaging. Alternatively to the commonly used ECG, the raw data-based kymogram function can be used as a synchronization signal. We used raw data of 100 consecutive patient exams to compare the performance of kymogram function to the ECG signal. For objective validation the correlation of the ECG and the kymogram was assessed. Additionally, we performed a double-blinded comparison of ECG-based and kymogram-based phase-correlated images. The two synchronization signals showed good correlation indicated by a mean difference in the detected heart rate of negligible 0.2 bpm. The mean image quality score was 2.0 points for kymogram-correlated images and 2.3 points for ECG-correlated images, respectively (3: best; 0: worst). The kymogram and the ECG provided images adequate for diagnosis for 93 and 97 patients, respectively. For 50% of the datasets the kymogram provided an equivalent or even higher image quality compared with the ECG signal. We conclude that an acceptable image quality can be assured in most cases by the kymogram. Improvements of image quality by the kymogram function were observed in a noticeable number of cases. The kymogram can serve as a backup solution when an ECG is not available or lacking in quality.
[Mh] Termos MeSH primário: Doença da Artéria Coronariana/diagnóstico
Coração/diagnóstico por imagem
Processamento de Imagem Assistida por Computador/métodos
Quimografia/métodos
Tomografia Computadorizada Espiral/métodos
[Mh] Termos MeSH secundário: Método Duplo-Cego
Eletrocardiografia/estatística & dados numéricos
Eletroquimografia/métodos
Eletroquimografia/estatística & dados numéricos
Coração/fisiopatologia
Cardiopatias/diagnóstico
Frequência Cardíaca
Seres Humanos
Quimografia/estatística & dados numéricos
Estudos Retrospectivos
Sensibilidade e Especificidade
Processamento de Sinais Assistido por Computador
Tomografia Computadorizada Espiral/instrumentação
[Pt] Tipo de publicação:COMPARATIVE STUDY; JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T; VALIDATION STUDIES
[Em] Mês de entrada:0806
[Cu] Atualização por classe:171010
[Lr] Data última revisão:
171010
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:071117
[St] Status:MEDLINE



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