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[PMID]:27777053
[Au] Autor:Uehara M; Takahashi J; Ikegami S; Kuraishi S; Shimizu M; Futatsugi T; Oba H; Kato H
[Ad] Endereço:Department of Orthopaedic Surgery, Shinshu University School of Medicine, 3-1-1 Asahi, Matsumoto City, Nagano 390-8621, Japan.
[Ti] Título:Are pedicle screw perforation rates influenced by distance from the reference frame in multilevel registration using a computed tomography-based navigation system in the setting of scoliosis?
[So] Source:Spine J;17(4):499-504, 2017 04.
[Is] ISSN:1878-1632
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:BACKGROUND CONTEXT: Pedicle screw fixation is commonly employed for the surgical correction of scoliosis but carries a risk of serious neurovascular or visceral structure events during screw insertion. To avoid these complications, we have been using a computed tomography (CT)-based navigation system during pedicle screw placement. As this could also prolong operation time, multilevel registration for pedicle screw insertion for posterior scoliosis surgery was developed to register three consecutive vertebrae in a single time with CT-based navigation. The reference frame was set either at the caudal end of three consecutive vertebrae or at one or two vertebrae inferior to the most caudal registered vertebra, and then pedicle screws were inserted into the three consecutive registered vertebrae and into the one or two adjacent vertebrae. OBJECTIVES: This study investigated the perforation rates of vertebrae at zero, one, two, three, or four or more levels above or below the vertebra at which the reference frame was set. STUDY DESIGN: This is a retrospective, single-center, single-surgeon study. PATIENT SAMPLE: One hundred sixty-one scoliosis patients who had undergone pedicle screw fixation were reviewed. OUTCOME MEASURES: Screw perforation rates were evaluated by postoperative CT. MATERIALS AND METHODS: We evaluated 161 scoliosis patients (34 boys and 127 girls; mean±standard deviation age: 14.6±2.8 years) who underwent pedicle screw fixation guided by a CT-based navigation system between March 2006 and December 2015. RESULTS: A total of 2,203 pedicle screws were inserted into T2-L5 using multilevel registration with CT-based navigation. The overall perforation rates for Grade 1, 2, or 3, Grade 2 or 3 (major perforations), and Grade 3 perforations (violations) were as follows: vertebrae at which the reference frame was set: 15.9%, 6.1%, and 2.5%; one vertebra above or below the reference frame vertebra: 16.5%, 4.0%, and 1.2%; two vertebrae above or below the reference frame vertebra: 20.7%, 8.7%, and 2.3%; three vertebrae above or below the reference frame vertebra: 23.8%, 7.9%, and 3.5%; and four vertebrae or more above/below the reference frame vertebra: 25.4%, 9.5%, and 4.1%, respectively. Fisher exact test was performed to detect significant differences among the above five groups. With regard to Grade 1, 2, or 3 perforations, the rates of screw perforation for three and four vertebrae or more above or below the reference frame vertebra were significantly larger than that for vertebrae at the reference frame (both p<.01). No significant differences were found for Grade 3 perforations (violations) among the groups. CONCLUSIONS: In multilevel registration of three consecutive vertebrae, the accuracy of screw insertion into vertebrae at which the reference frame was not set was not significantly inferior to that in vertebrae at which the reference frame was set with regard to major perforation rate. Including minor perforations, however, a distance of three vertebrae or more above or below the reference frame vertebra produced significantly more frequent perforations.
[Mh] Termos MeSH primário: Parafusos Pediculares/efeitos adversos
Complicações Pós-Operatórias/etiologia
Escoliose/cirurgia
Fusão Vertebral/efeitos adversos
Cirurgia Assistida por Computador/efeitos adversos
[Mh] Termos MeSH secundário: Adolescente
Criança
Feminino
Seres Humanos
Masculino
Fusão Vertebral/métodos
Cirurgia Assistida por Computador/métodos
Tomografia por Raios X
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1708
[Cu] Atualização por classe:180129
[Lr] Data última revisão:
180129
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161026
[St] Status:MEDLINE


  2 / 5128 MEDLINE  
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[PMID]:28732010
[Au] Autor:Carrel M; Beltran MA; Morales VL; Derlon N; Morgenroth E; Kaufmann R; Holzner M
[Ad] Endereço:Institute of Environmental Engineering, ETH Zürich, Stefano Franscini-Platz 5, 8093 Zurich, Switzerland.
[Ti] Título:Biofilm imaging in porous media by laboratory X-Ray tomography: Combining a non-destructive contrast agent with propagation-based phase-contrast imaging tools.
[So] Source:PLoS One;12(7):e0180374, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:X-ray tomography is a powerful tool giving access to the morphology of biofilms, in 3D porous media, at the mesoscale. Due to the high water content of biofilms, the attenuation coefficient of biofilms and water are very close, hindering the distinction between biofilms and water without the use of contrast agents. Until now, the use of contrast agents such as barium sulfate, silver-coated micro-particles or 1-chloronaphtalene added to the liquid phase allowed imaging the biofilm 3D morphology. However, these contrast agents are not passive and potentially interact with the biofilm when injected into the sample. Here, we use a natural inorganic compound, namely iron sulfate, as a contrast agent progressively bounded in dilute or colloidal form into the EPS matrix during biofilm growth. By combining a very long source-to-detector distance on a X-ray laboratory source with a Lorentzian filter implemented prior to tomographic reconstruction, we substantially increase the contrast between the biofilm and the surrounding liquid, which allows revealing the 3D biofilm morphology. A comparison of this new method with the method proposed by Davit et al (Davit et al., 2011), which uses barium sulfate as a contrast agent to mark the liquid phase was performed. Quantitative evaluations between the methods revealed substantial differences for the volumetric fractions obtained from both methods. Namely, contrast agent-biofilm interactions (e.g. biofilm detachment) occurring during barium sulfate injection caused a reduction of the biofilm volumetric fraction of more than 50% and displacement of biofilm patches elsewhere in the column. Two key advantages of the newly proposed method are that passive addition of iron sulfate maintains the integrity of the biofilm prior to imaging, and that the biofilm itself is marked by the contrast agent, rather than the liquid phase as in other available methods. The iron sulfate method presented can be applied to understand biofilm development and bioclogging mechanisms in porous materials and the obtained biofilm morphology could be an ideal basis for 3D numerical calculations of hydrodynamic conditions to investigate biofilm-flow coupling.
[Mh] Termos MeSH primário: Biofilmes
Tomografia por Raios X/métodos
[Mh] Termos MeSH secundário: Sulfato de Bário
Meios de Contraste
Compostos Ferrosos
Polímeros de Fluorcarboneto
Imagem Tridimensional/métodos
Porosidade
Reologia
Água
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Contrast Media); 0 (Ferrous Compounds); 0 (Fluorocarbon Polymers); 059QF0KO0R (Water); 25BB7EKE2E (Barium Sulfate); 39464-59-0 (perfluorosulfonic acid); 39R4TAN1VT (ferrous sulfate)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170927
[Lr] Data última revisão:
170927
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170722
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0180374


  3 / 5128 MEDLINE  
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[PMID]:28420892
[Au] Autor:Morikawa T; Okabayashi T; Shima Y; Sumiyoshi T; Kozuki A; Saisaka Y; Tokumaru T; Sui K; Iwata J; Matsumoto M; Morita S; Nishioka Y
[Ad] Endereço:Department of Gastroenterological Surgery, Kochi Health Sciences Center, Kochi 781-8555, Japan.
[Ti] Título:Adenomyomatosis Concomitant with Primary Gallbladder Carcinoma.
[So] Source:Acta Med Okayama;71(2):113-118, 2017 Apr.
[Is] ISSN:0386-300X
[Cp] País de publicação:Japan
[La] Idioma:eng
[Ab] Resumo:Some clinicians have proposed a relationship between gallbladder (GB) cancer and adenomyomatosis (ADM) of the gallbladder, although the latter condition is not considered to have malignant potential. We retrospectively reviewed the surgical pathology database of patients who underwent resection for ADM of the gallbladder at our institution from March 2005 to May 2015. In total, 624 patients underwent surgical resection of the gallbladder with Rokitansky-Aschoff sinuses. Of these cases, 93 were pathologically diagnosed with ADM of the gallbladder, with 44 (47.3%) classified macroscopically as fundal-type ADM, 26 (28.0%) as segmental type, and 23 (24.7%) as diffuse-type ADM. In 3 of the 93 (3.2%) resected specimens, early-stage GB carcinoma was detected, although preoperative imaging did not suggest a malignant neoplasm of the gallbladder in any of these patients. GB cancer subsequently developed in the mucosa of the fundal compartment distal to the annular stricture of the segmental-type ADM in 2 of these patients and against the background of the fundal-type ADM in 1 patient. This study revealed the difficulty of early diagnosis of primary GB cancer in the setting of concurrent ADM, and clinicians should be aware of this frequent coexistence.
[Mh] Termos MeSH primário: Adenomioma/patologia
Neoplasias da Vesícula Biliar/patologia
[Mh] Termos MeSH secundário: Adenomioma/diagnóstico por imagem
Idoso
Diagnóstico Diferencial
Feminino
Vesícula Biliar/anormalidades
Vesícula Biliar/cirurgia
Neoplasias da Vesícula Biliar/diagnóstico por imagem
Seres Humanos
Masculino
Meia-Idade
Estudos Retrospectivos
Tomografia por Raios X
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171016
[Lr] Data última revisão:
171016
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170420
[St] Status:MEDLINE
[do] DOI:10.18926/AMO/54979


  4 / 5128 MEDLINE  
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[PMID]:28241719
[Au] Autor:Liu Z; Qiu Y; Li Y; Zhao ZH; Wang B; Zhu F; Yu Y; Sun X; Zhu ZZ
[Ad] Endereço:Department of Orthopaedics, Nanjing Drum Tower Hospital, the Affiliated Hospital of Nanjing University Medical School, Nanjing 210008, China.
[Ti] Título:[Clinical application of three-dimensional O-arm navigation system in treating patients with dystrophic scoliosis secondary to neurofibromatosis type â… ].
[So] Source:Zhonghua Wai Ke Za Zhi;55(3):186-191, 2017 Mar 01.
[Is] ISSN:0529-5815
[Cp] País de publicação:China
[La] Idioma:chi
[Ab] Resumo:To investigate the clinical outcomes and the accuracy of O-arm-navigation system assisted pedicle screw insertion in dystrophic scoliosis secondary to neurofibromatosis type â… (NF-1). A retrospective study was conducted in 41 patients with dystrophic NF-1-associated thoracic scoliosis who were surgically treated at Department of Orthopaedics, Nanjing Drum Tower Hospital, the Affiliated Hospital of Nanjing University Medical School between June 2012 and October 2014 with more than 18 months follow-up. The patients were then divided into two groups: 18 patients were under the assistance of O-arm-navigation-based pedicle screw insertion (O-arm group) and the remaining 23 patients' pedicle screws insertion were conducted by free-hand (free-hand group). The X-ray and CT were analyzed to investigate the correction rate and safety of pedicle insertion. -test was used to analyze measurement data and χ(2) test was used to analyze accuracy of screw insertion between the two groups. The mean coronal Cobb angle was 63.2°±8.7° in the O-arm group and 66.9°±7.4° in the free-hand group ( >0.05), which was then corrected into 23.1°±6.8° and 30.2°±7.6°( =2.231, =0.031) after surgery respectively.Operation time was (265.0±70.3)minutes and estimated blood loss was (1 024±465)ml in the O-arm group. Operation time and estimated blood loss was (243.0±49.6)minutes and (1 228±521)ml respectively in the free-hand group, which had no significant difference between the two groups. However, the implant density was higher in the O-arm group than that in the free-hand group ((64.1±10.8)% .(44.3±15.3)%)( =4.652, =0.000). The O-arm group comprised 122 screws, of which 72.9% were excellent, 22.1% were good and 4.9% were bad. The free-hand group comprised 136 screws and 48.5% of them were excellent, 33.8% were good and 17.6% were bad.Accuracy of pedicle screw insertion was higher in the O-arm group than that in the free-hand group(χ(2)=10.140, <0.05). By June 2016, the average follow-up period was (20.9±3.4)months(ranging from18 to 26 months), including (20.3±3.1)months in the O-arm group and (21.4±5.5)months in the free-hand group. At last follow-up point, coronal correction loss was significantly higher in the free-hand group than that in the O-arm group (6.3°±2.6° . 4.4°±1.6°)( =2.719, =0.009). Compared with free-hand technique, O-arm-navigation technique could enhance accuracy of pedicle insertion and implant density of dystrophic region in dystrophic NF-1-associated scoliosis patients, which result in a better correction rate and less correction loss. Besides, the advantage of O-arm-navigation do not increase operative time and estimate blood loss.
[Mh] Termos MeSH primário: Imagem Tridimensional
Neurofibromatose 1/complicações
Procedimentos Ortopédicos
Escoliose/cirurgia
Tomografia por Raios X
[Mh] Termos MeSH secundário: Adolescente
Parafusos Ósseos
Feminino
Seres Humanos
Masculino
Duração da Cirurgia
Ortopedia
Parafusos Pediculares
Estudos Retrospectivos
Segurança
Escoliose/etiologia
Cirurgia Assistida por Computador
Resultado do Tratamento
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1708
[Cu] Atualização por classe:170807
[Lr] Data última revisão:
170807
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170301
[St] Status:MEDLINE
[do] DOI:10.3760/cma.j.issn.0529-5815.2017.03.005


  5 / 5128 MEDLINE  
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[PMID]:28151728
[Au] Autor:Zeng R; Badano A; Myers KJ
[Ti] Título:Optimization of digital breast tomosynthesis (DBT) acquisition parameters for human observers: effect of reconstruction algorithms.
[So] Source:Phys Med Biol;62(7):2598-2611, 2017 Apr 07.
[Is] ISSN:1361-6560
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:We showed in our earlier work that the choice of reconstruction methods does not affect the optimization of DBT acquisition parameters (angular span and number of views) using simulated breast phantom images in detecting lesions with a channelized Hotelling observer (CHO). In this work we investigate whether the model-observer based conclusion is valid when using humans to interpret images. We used previously generated DBT breast phantom images and recruited human readers to find the optimal geometry settings associated with two reconstruction algorithms, filtered back projection (FBP) and simultaneous algebraic reconstruction technique (SART). The human reader results show that image quality trends as a function of the acquisition parameters are consistent between FBP and SART reconstructions. The consistent trends confirm that the optimization of DBT system geometry is insensitive to the choice of reconstruction algorithm. The results also show that humans perform better in SART reconstructed images than in FBP reconstructed images. In addition, we applied CHOs with three commonly used channel models, Laguerre-Gauss (LG) channels, square (SQR) channels and sparse difference-of-Gaussian (sDOG) channels. We found that LG channels predict human performance trends better than SQR and sDOG channel models for the task of detecting lesions in tomosynthesis backgrounds. Overall, this work confirms that the choice of reconstruction algorithm is not critical for optimizing DBT system acquisition parameters.
[Mh] Termos MeSH primário: Algoritmos
Neoplasias da Mama/patologia
Mama/patologia
Processamento de Imagem Assistida por Computador/normas
Mamografia/métodos
Imagens de Fantasmas
Tomografia por Raios X/métodos
[Mh] Termos MeSH secundário: Mama/diagnóstico por imagem
Neoplasias da Mama/diagnóstico por imagem
Feminino
Seres Humanos
Processamento de Imagem Assistida por Computador/métodos
Modelos Teóricos
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171030
[Lr] Data última revisão:
171030
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170203
[St] Status:MEDLINE
[do] DOI:10.1088/1361-6560/aa5ddc


  6 / 5128 MEDLINE  
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[PMID]:28151431
[Au] Autor:Mackenzie A; Marshall NW; Hadjipanteli A; Dance DR; Bosmans H; Young KC
[Ad] Endereço:National Coordinating Centre for the Physics of Mammography, Royal Surrey County Hospital, Guildford, Surrey GU2 7XX, United Kingdom.
[Ti] Título:Characterisation of noise and sharpness of images from four digital breast tomosynthesis systems for simulation of images for virtual clinical trials.
[So] Source:Phys Med Biol;62(6):2376-2397, 2017 Mar 21.
[Is] ISSN:1361-6560
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:In-depth evaluation of the noise and sharpness characteristics of FujiFilm Innovality, GE SenoClaire, Hologic Selenia Dimensions and Siemens Inspiration digital breast tomosynthesis (DBT) systems was performed with the intention of improving image simulation for virtual clinical trials. Noise power spectra (NPS) and modulation transfer function curves (MTF) were measured for planar modes and for the first and central projections for DBT modes. In DBT mode, the x-ray beam was blocked for the projections before the central projection in order to remove the influence of lag and ghosting from the previous images. A quadratic fit between the NPS and linearised pixel value gave the noise coefficients for planar and DBT imaging modes. The spatial frequencies corresponding to an MTF of 0.5 (MTF ) were calculated from the MTF measurements made on the breast support and at 40 mm above the breast support. This was done for the first and the central projections. The percentage of signal carried over from the first projection to subsequent images (lag) was measured using a slit. The noise associated with lag was also evaluated. The DBT modes typically had lower electronic noise coefficients but higher structural noise coefficients compared to the respective planar mode MTF measured 40 mm above the table was between 6% and 47% lower for continuous scanning systems compared to 1% lower for step and shoot systems. For wide angle DBT, the MTF of the first projection was 18% (FujiFilm) and 28% (Siemens) lower than for the central projection. Lag in the second projection was 2.2%, 0.3%, 0.8% for the FujiFilm, GE and Hologic systems respectively. In all cases, the noise associated with lag was negligible. Current modelling frameworks for virtual clinical trials of breast DBT systems need to be adapted to account for signals from lag and variations in the MTF at wide angles.
[Mh] Termos MeSH primário: Mamografia/métodos
Intensificação de Imagem Radiográfica/métodos
Tomografia por Raios X/métodos
[Mh] Termos MeSH secundário: Ensaios Clínicos como Assunto
Feminino
Seres Humanos
Mamografia/normas
Imagens de Fantasmas
Intensificação de Imagem Radiográfica/normas
Razão Sinal-Ruído
Tomografia por Raios X/normas
[Pt] Tipo de publicação:COMPARATIVE STUDY; EVALUATION STUDIES; JOURNAL ARTICLE
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171012
[Lr] Data última revisão:
171012
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170203
[St] Status:MEDLINE
[do] DOI:10.1088/1361-6560/aa5dd9


  7 / 5128 MEDLINE  
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[PMID]:28140377
[Au] Autor:Baran P; Pacile S; Nesterets YI; Mayo SC; Dullin C; Dreossi D; Arfelli F; Thompson D; Lockie D; McCormack M; Taba ST; Brun F; Pinamonti M; Nickson C; Hall C; Dimmock M; Zanconati F; Cholewa M; Quiney H; Brennan PC; Tromba G; Gureyev TE
[Ad] Endereço:ARC Centre of Excellence in Advanced Molecular Imaging, School of Physics, The University of Melbourne, Parkville 3010, Australia.
[Ti] Título:Optimization of propagation-based x-ray phase-contrast tomography for breast cancer imaging.
[So] Source:Phys Med Biol;62(6):2315-2332, 2017 Mar 21.
[Is] ISSN:1361-6560
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The aim of this study was to optimise the experimental protocol and data analysis for in-vivo breast cancer x-ray imaging. Results are presented of the experiment at the SYRMEP beamline of Elettra Synchrotron using the propagation-based phase-contrast mammographic tomography method, which incorporates not only absorption, but also x-ray phase information. In this study the images of breast tissue samples, of a size corresponding to a full human breast, with radiologically acceptable x-ray doses were obtained, and the degree of improvement of the image quality (from the diagnostic point of view) achievable using propagation-based phase-contrast image acquisition protocols with proper incorporation of x-ray phase retrieval into the reconstruction pipeline was investigated. Parameters such as the x-ray energy, sample-to-detector distance and data processing methods were tested, evaluated and optimized with respect to the estimated diagnostic value using a mastectomy sample with a malignant lesion. The results of quantitative evaluation of images were obtained by means of radiological assessment carried out by 13 experienced specialists. A comparative analysis was performed between the x-ray and the histological images of the specimen. The results of the analysis indicate that, within the investigated range of parameters, both the objective image quality characteristics and the subjective radiological scores of propagation-based phase-contrast images of breast tissues monotonically increase with the strength of phase contrast which in turn is directly proportional to the product of the radiation wavelength and the sample-to-detector distance. The outcomes of this study serve to define the practical imaging conditions and the CT reconstruction procedures appropriate for low-dose phase-contrast mammographic imaging of live patients at specially designed synchrotron beamlines.
[Mh] Termos MeSH primário: Neoplasias da Mama/diagnóstico por imagem
Mamografia/métodos
Tomografia por Raios X/métodos
[Mh] Termos MeSH secundário: Feminino
Seres Humanos
Mamografia/normas
Tomografia por Raios X/normas
Raios X
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171012
[Lr] Data última revisão:
171012
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170201
[St] Status:MEDLINE
[do] DOI:10.1088/1361-6560/aa5d3d


  8 / 5128 MEDLINE  
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[PMID]:28072582
[Au] Autor:Hadjipanteli A; Elangovan P; Mackenzie A; Looney PT; Wells K; Dance DR; Young KC
[Ad] Endereço:National Coordinating Centre for the Physics of Mammography, Royal Surrey County Hospital, Guildford, Surrey, UK.
[Ti] Título:The effect of system geometry and dose on the threshold detectable calcification diameter in 2D-mammography and digital breast tomosynthesis.
[So] Source:Phys Med Biol;62(3):858-877, 2017 Feb 07.
[Is] ISSN:1361-6560
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Digital breast tomosynthesis (DBT) is under consideration to replace or to be used in combination with 2D-mammography in breast screening. The aim of this study was the comparison of the detection of microcalcification clusters by human observers in simulated breast images using 2D-mammography, narrow angle (15°/15 projections) and wide angle (50°/25 projections) DBT. The effects of the cluster height in the breast and the dose to the breast on calcification detection were also tested. Simulated images of 6 cm thick compressed breasts were produced with and without microcalcification clusters inserted, using a set of image modelling tools for 2D-mammography and DBT. Image processing and reconstruction were performed using commercial software. A series of 4-alternative forced choice (4AFC) experiments was conducted for signal detection with the microcalcification clusters as targets. Threshold detectable calcification diameter was found for each imaging modality with standard dose: 2D-mammography: 2D-mammography (165 ± 9 µm), narrow angle DBT (211 ± 11 µm) and wide angle DBT (257 ± 14 µm). Statistically significant differences were found when using different doses, but different geometries had a greater effect. No differences were found between the threshold detectable calcification diameters at different heights in the breast. Calcification clusters may have a lower detectability using DBT than 2D imaging.
[Mh] Termos MeSH primário: Doenças Mamárias/diagnóstico por imagem
Calcinose/diagnóstico por imagem
Mamografia/métodos
Imagens de Fantasmas
Intensificação de Imagem Radiográfica/métodos
Interpretação de Imagem Radiográfica Assistida por Computador/métodos
Tomografia por Raios X/métodos
[Mh] Termos MeSH secundário: Feminino
Seres Humanos
Intensificação de Imagem Radiográfica/instrumentação
Software
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170928
[Lr] Data última revisão:
170928
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170111
[St] Status:MEDLINE
[do] DOI:10.1088/1361-6560/aa4f6e


  9 / 5128 MEDLINE  
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[PMID]:28029492
[Au] Autor:Evans A; Vinnicombe S
[Ad] Endereço:Mail Box 4, Level 7, Breast Imaging, Ninewells Hospital and Medical School, Dundee University, DD1 9SY, United Kingdom. Electronic address: a.z.evans@dundee.ac.uk.
[Ti] Título:Overdiagnosis in breast imaging.
[So] Source:Breast;31:270-273, 2017 Feb.
[Is] ISSN:1532-3080
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:The main harm of overdiagnosis is overtreatment. However a form of overdiagnosis also occurs when foci of cancer are found by imaging in addition to the symptomatic lesion when this leads to additional treatment which does not benefit the patient. Even if overtreatment is avoided, knowledge of the diagnosis can still cause psychological harm. Overdiagnosis is an inevitable effect of mammographic screening as the benefit comes from diagnosing breast cancer prior to clinical detectability. Estimates of the rate of overdiagnosis at screening are around 10%. DCIS represents 20% of cancers detected by screening and is the main focus in the overdiagnosis debate. Detection and treatment of low grade DCIS and invasive tubular cancer would appear to represent overdiagnosis in most cases. Supplementary screening with tomosynthesis or US are both likely to increase overdiagnosis as both modalities detect predominantly low grade invasive cancers. MRI causes overdiagnosis because it is so sensitive that it detects real tumour foci which after radiotherapy and systemic therapy do not, in many cases go on and cause local recurrence if the women had had no MRI and undergone breast conservation and adjuvant therapy with these small foci left in situ.
[Mh] Termos MeSH primário: Neoplasias da Mama/diagnóstico por imagem
Mama/diagnóstico por imagem
Detecção Precoce de Câncer/efeitos adversos
Uso Excessivo de Produtos e Serviços de Saúde
[Mh] Termos MeSH secundário: Mama/patologia
Carcinoma de Mama in situ/diagnóstico por imagem
Carcinoma de Mama in situ/patologia
Neoplasias da Mama/patologia
Carcinoma Intraductal não Infiltrante/diagnóstico por imagem
Carcinoma Intraductal não Infiltrante/patologia
Detecção Precoce de Câncer/utilização
Feminino
Seres Humanos
Imagem por Ressonância Magnética
Mamografia
Programas de Rastreamento/efeitos adversos
Programas de Rastreamento/utilização
Tomografia por Raios X
Ultrassonografia Mamária
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1707
[Cu] Atualização por classe:170713
[Lr] Data última revisão:
170713
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161229
[St] Status:MEDLINE


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[PMID]:27867124
[Au] Autor:Chang J; Kim JS; Jo H
[Ad] Endereço:Department of Neurosurgery, Soon Chun Hyang University Hospital, Seoul, Korea.
[Ti] Título:Ventral Dural Injury After Oblique Lumbar Interbody Fusion.
[So] Source:World Neurosurg;98:881.e1-881.e4, 2017 Feb.
[Is] ISSN:1878-8769
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:BACKGROUND: Oblique lumbar interbody fusion (OLIF) through the oblique corridor between the aorta and anterior border of psoas muscle is favored among spinal surgeons who employ minimally invasive techniques. We report a case of ventral dural tear after OLIF that was associated with the inaccurate trajectory direction of endplate preparation. This is the first report to our knowledge of ventral dural tear associated with OLIF. CASE DESCRIPTION: A 72-year-old woman presented with right leg pain and numbness. X-rays showed degenerative spondylolisthesis and loss of disc height at L4-L5 and L5-S1 levels. Magnetic resonance imaging revealed right-sided paracentral disc herniation at the L3-L4 level and foraminal disc herniation at L4-L5. The initial surgical plan was OLIF of L3-L4 and L4-L5 after percutaneous screw fixation without laminectomy. With the patient in the lateral position, discectomy and endplate preparation were done successfully at the L3-L4 level, and the same procedure was done at the L4-L5 level for OLIF. A sharp Cobbs elevator for endplate preparation triggered a ventral dural defect at the L4-L5 level. We changed the patient's position to attempt dural repair. The ventral dural defect could not be repaired because it was too large. After the herniated rootlets were repositioned, TachoComb was patched over the defect site. Postoperatively, the patient has no definite neurologic deficits. CONCLUSIONS: When a surgeon performs OLIF, ventral dural injury should be avoided during the procedure of endplate preparation and contralateral annular release.
[Mh] Termos MeSH primário: Deslocamento do Disco Intervertebral/etiologia
Vértebras Lombares/cirurgia
Complicações Pós-Operatórias/etiologia
Fusão Vertebral/efeitos adversos
Lesões do Sistema Vascular/etiologia
[Mh] Termos MeSH secundário: Idoso
Feminino
Fluoroscopia
Seres Humanos
Deslocamento do Disco Intervertebral/diagnóstico por imagem
Vértebras Lombares/diagnóstico por imagem
Imagem por Ressonância Magnética
Complicações Pós-Operatórias/diagnóstico por imagem
Espondilolistese/cirurgia
Tomografia por Raios X
Lesões do Sistema Vascular/diagnóstico por imagem
[Pt] Tipo de publicação:CASE REPORTS; JOURNAL ARTICLE
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170919
[Lr] Data última revisão:
170919
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161122
[St] Status:MEDLINE



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