26
|
LeVine H, Spielmann HP, Matveev S, Cauvi FM, Murphy MP, Beckett TL, McCarty K, Lott IT, Doran E, Schmitt F, Head E. Down syndrome: age-dependence of PiB binding in postmortem frontal cortex across the lifespan. Neurobiol Aging 2017; 54:163-169. [PMID: 28385551 DOI: 10.1016/j.neurobiolaging.2017.03.005] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2017] [Revised: 03/02/2017] [Accepted: 03/03/2017] [Indexed: 01/19/2023]
Abstract
Beta-amyloid (Aβ) deposition in brain accumulates as a function of age in people with Down syndrome (DS) with subsequent development into Alzheimer disease neuropathology, typically by 40 years of age. In vivo imaging using the Pittsburgh compound B (PiB) ligand has facilitated studies linking Aβ, cognition, and dementia in DS. However, there are no studies of PiB binding across the lifespan in DS. The current study describes in vitro 3H-PiB binding in the frontal cortex of autopsy cases with DS compared to non-DS controls. Tissue from 64 cases included controls (n = 25) and DS (n = 39). In DS, 3H-PiB binding was significantly associated with age. After age 40 years in DS, 3H-PiB binding rose dramatically along with increasing individual variability. 3H-PiB binding correlated with the amount of Aβ42. Using fixed frontal tissue and fluorescent 6-CN-PiB, neuritic and cored plaques along with extensive cerebral amyloid angiopathy showed 6-CN-PiB binding. These results suggest that cortical PiB binding as shown by positron emission tomography imaging reflects plaques and cerebral amyloid angiopathy in DS brain.
Collapse
|
27
|
Alix L, Decaux O, Moreau C, Viel J, Schmitt F, Seguret F, Jego P. Répartition et épidémiologie des gammapathies monoclonales en France : prévalence plus importante d’IgM et de maladie de Waldenström dans l’Ouest de la France. Rev Med Interne 2016. [DOI: 10.1016/j.revmed.2016.10.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
28
|
Rossi ED, Bizzarro T, Martini M, Capodimonti S, Cenci T, Fadda G, Schmitt F, Larocca LM. Morphological features that can predict BRAF V600E -mutated carcinoma in paediatric thyroid cytology. Cytopathology 2016; 28:55-64. [PMID: 27256275 DOI: 10.1111/cyt.12350] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/04/2016] [Indexed: 12/22/2022]
Abstract
OBJECTIVE BRAFV600E represents the most common diagnostic marker in papillary thyroid carcinoma (PTC). A few papers have demonstrated the correlation between BRAFV600E and specific morphological findings on PTCs in the adult population. This is the first reported series investigating cytological morphological parameters in paediatric thyroid carcinoma. METHODS One hundred and nineteen paediatric samples (56 male and 63 female patients), diagnosed in the period between April 2013 and July 2015, were enrolled in the study. Fifteen patients with inadequate results were excluded. Cytological cases were processed with liquid-based cytology (LBC). BRAFV600E and immunocytochemistry for the VE1 antibody were performed on LBC. RESULTS The diagnostic series included 10 mutated and 94 wild-type (WT) cases. Twenty two percent surgical samples showed 96% cytohistological concordance. The morphological analysis revealed plump cells (abundant eosinophilic cytoplasm and PTC nuclei) in all 10 mutated cases with only four cases showing a focal (less than 20% of the cells) plump component. None of the WT showed plump cells. A sickle nuclear shape was seen only in the mutated cases. VE1 yielded 100% positivity on mutated cases with three cytohistological discrepancies. CONCLUSIONS The BRAFV600E mutation is also seen in paediatric cytology and the morphological features showed a high accuracy as both predictive mutational parameters and a helpful aid in management mainly of the aggressive BRAFV600E mutated carcinomas.
Collapse
|
29
|
Rettig L, Cortés R, Chu JH, Fisher IR, Schmitt F, Moore RG, Shen ZX, Kirchmann PS, Wolf M, Bovensiepen U. Persistent order due to transiently enhanced nesting in an electronically excited charge density wave. Nat Commun 2016; 7:10459. [PMID: 26804717 PMCID: PMC4737756 DOI: 10.1038/ncomms10459] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2015] [Accepted: 12/14/2015] [Indexed: 12/02/2022] Open
Abstract
Non-equilibrium conditions may lead to novel properties of materials with broken symmetry ground states not accessible in equilibrium as vividly demonstrated by non-linearly driven mid-infrared active phonon excitation. Potential energy surfaces of electronically excited states also allow to direct nuclear motion, but relaxation of the excess energy typically excites fluctuations leading to a reduced or even vanishing order parameter as characterized by an electronic energy gap. Here, using femtosecond time- and angle-resolved photoemission spectroscopy, we demonstrate a tendency towards transient stabilization of a charge density wave after near-infrared excitation, counteracting the suppression of order in the non-equilibrium state. Analysis of the dynamic electronic structure reveals a remaining energy gap in a highly excited transient state. Our observation can be explained by a competition between fluctuations in the electronically excited state, which tend to reduce order, and transiently enhanced Fermi surface nesting stabilizing the order. Whilst excited electronic states may exhibit unique non-equilibrium behavior, order is inhibited by fluctuations. Here, the authors use femtosecond photoemission spectroscopy to demonstrate transient stabilization of charge density wave order in rare earth tritellurides after near-infrared excitation.
Collapse
|
30
|
Gourgou-Bourgade S, Cameron D, Poortmans P, Asselain B, Azria D, Cardoso F, A'Hern R, Bliss J, Bogaerts J, Bonnefoi H, Brain E, Cardoso MJ, Chibaudel B, Coleman R, Cufer T, Dal Lago L, Dalenc F, De Azambuja E, Debled M, Delaloge S, Filleron T, Gligorov J, Gutowski M, Jacot W, Kirkove C, MacGrogan G, Michiels S, Negreiros I, Offersen BV, Penault Llorca F, Pruneri G, Roche H, Russell NS, Schmitt F, Servent V, Thürlimann B, Untch M, van der Hage JA, van Tienhoven G, Wildiers H, Yarnold J, Bonnetain F, Mathoulin-Pélissier S, Bellera C, Dabakuyo-Yonli TS. Guidelines for time-to-event end point definitions in breast cancer trials: results of the DATECAN initiative (Definition for the Assessment of Time-to-event Endpoints in CANcer trials). Ann Oncol 2015; 26:2505-6. [PMID: 26467471 DOI: 10.1093/annonc/mdv478] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
31
|
Gourgou-Bourgade S, Cameron D, Poortmans P, Asselain B, Azria D, Cardoso F, A'Hern R, Bliss J, Bogaerts J, Bonnefoi H, Brain E, Cardoso MJ, Chibaudel B, Coleman R, Cufer T, Dal Lago L, Dalenc F, De Azambuja E, Debled M, Delaloge S, Filleron T, Gligorov J, Gutowski M, Jacot W, Kirkove C, MacGrogan G, Michiels S, Negreiros I, Offersen BV, Penault Llorca F, Pruneri G, Roche H, Russell NS, Schmitt F, Servent V, Thürlimann B, Untch M, van der Hage JA, van Tienhoven G, Wildiers H, Yarnold J, Bonnetain F, Mathoulin-Pélissier S, Bellera C, Dabakuyo-Yonli TS. Guidelines for time-to-event end point definitions in breast cancer trials: results of the DATECAN initiative (Definition for the Assessment of Time-to-event Endpoints in CANcer trials)†. Ann Oncol 2015; 26:873-879. [PMID: 25725046 DOI: 10.1093/annonc/mdv106] [Citation(s) in RCA: 120] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2014] [Accepted: 02/16/2015] [Indexed: 02/11/2024] Open
Abstract
BACKGROUND Using surrogate end points for overall survival, such as disease-free survival, is increasingly common in randomized controlled trials. However, the definitions of several of these time-to-event (TTE) end points are imprecisely which limits interpretation and cross-trial comparisons. The estimation of treatment effects may be directly affected by the definitions of end points. The DATECAN initiative (Definition for the Assessment of Time-to-event Endpoints in CANcer trials) aims to provide recommendations for definitions of TTE end points. We report guidelines for randomized cancer clinical trials (RCTs) in breast cancer. PATIENTS AND METHODS A literature review was carried out to identify TTE end points (primary or secondary) reported in publications of randomized trials or guidelines. An international multidisciplinary panel of experts proposed recommendations for the definitions of these end points based on a validated consensus method that formalize the degree of agreement among experts. RESULTS Recommended guidelines for the definitions of TTE end points commonly used in RCTs for breast cancer are provided for non-metastatic and metastatic settings. CONCLUSION The use of standardized definitions should facilitate comparisons of trial results and improve the quality of trial design and reporting. These guidelines could be of particular interest to those involved in the design, conducting, reporting, or assessment of RCT.
Collapse
|
32
|
Herbert A, Anic V, Cochand-Priollet B, Dina R, Ehya H, Eide ML, Fabre M, Field A, Kapila K, Kardum-Skelin I, Oliveira MH, Olszewski W, Önal B, Nasioutziki M, Nayar R, Nielsen K, Shabalova I, Schmitt F, Tötsch M, Wilson A, Vass L, Zeppa P. Training and practice of cytotechnologists: a discussion forum focused on Europe. Cytopathology 2014; 25:307-15. [DOI: 10.1111/cyt.12201] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/11/2014] [Indexed: 12/28/2022]
|
33
|
Shandera-Ochsner AL, Han DY, Rose D, Aroor SR, Schmitt F, Bellamy LM, Dobbs MR. Comparing the trends of elevated blood pressure in appalachian and non-Appalachian regions. J Clin Hypertens (Greenwich) 2014; 16:713-5. [PMID: 25132199 DOI: 10.1111/jch.12397] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2014] [Revised: 07/16/2014] [Accepted: 07/20/2014] [Indexed: 11/27/2022]
Abstract
As an established risk factor for cardiovascular disease and stroke, hypertension risks are often thought to be more prevalent in Appalachian mountain ranges when compared with other neighboring counterpart regions. This study evaluated blood pressure (BP) readings among 2358 Kentucky residents attending community stroke risk screening events held in 15 counties, including nine Appalachian counties (n=1134) and six non-Appalachian counties (n=1224). With high BP being operationally defined as ≥140/90 mm Hg, 41.5% of Appalachian county residents had elevated BP compared with 42.6% among those from non-Appalachian counties. Although the counties with the highest rates of elevated BP did tend to reside in the Appalachian region, there was no significant difference between rates of elevated BP in Appalachia vs non-Appalachian counties. This dataset is proposed as a pilot project to encourage further pursuit of a larger controlled project.
Collapse
|
34
|
Martins D, Beca F, Schmitt F. Metastatic breast cancer: mechanisms and opportunities for cytology. Cytopathology 2014; 25:225-30. [PMID: 24889678 DOI: 10.1111/cyt.12158] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/07/2014] [Indexed: 01/15/2023]
Abstract
Despite significant advances in diagnosis, surgical techniques, general patient care, and local and systemic adjuvant therapies, metastatic disease remains the most critical condition limiting the survival of patients with breast cancer. Therefore, the development of effective treatment against late-arising metastasis has become the centre of clinical attention and is one of the current challenges in cancer research. A deeper understanding of the metastatic cascade is fundamental, and the need for repetitive tumour assessments for the evaluation of tumour evolution is a relatively new practice in routine medical care. As such, fine needle aspiration cytology (FNAC) is ideally placed to monitor biological changes in metastasis that may affect treatment and response. As FNAC is a minimally invasive method, it can be performed repeatedly with relatively little trauma, and selective ancillary tests can be applied to FNAC specimens, including for tumour whose primary nature is known. Herein, we review how the linear and parallel models explain metastatic dissemination, thus influencing therapeutic and clinical decisions, and how cytology, together with immunocytochemistry and molecular analysis, can be a tool for routine clinical practice and clinical trials aimed at metastatic disease with a special emphasis on breast cancer.
Collapse
|
35
|
Schmitt F, Bouhours-Nouet N, Beaumesnil M, Dubois N, Coutant R, Topart P, Weil D, Podevin G. SFP PC-16 - Impact de l’anneau gastrique ajustable chez l’adolescent obèse. Arch Pediatr 2014. [DOI: 10.1016/s0929-693x(14)72166-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
36
|
Geslin D, Schmitt F, Clermidi P, Fremond B, Gabielza M, Lardy H, Leboucher B, Marechaud M, Saliou A, Podevin G. SFCP CO-19 - Quels sont les facteurs échographiques anténataux prédictifs de laparoschisis compliqués ? Arch Pediatr 2014. [DOI: 10.1016/s0929-693x(14)71657-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
37
|
Theysohn J, Kraff O, Gerwig M, Timmann D, Schmitt F, Gizewski ER, Ladd ME, Ladd SC, Bitz AK. Vestibuläre Effekte einer 7 Tesla MRT-Kopfuntersuchung im Vergleich zu 1,5 und 0 Tesla. ROFO-FORTSCHR RONTG 2014. [DOI: 10.1055/s-0034-1372769] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
38
|
Vogl TJ, Zangos S, Scholtz JE, Schmitt F, Paetzold S, Trojan J, Orsi F, Lotz G, Ferrucci P. Chemosaturation with percutaneous hepatic perfusions of melphalan for hepatic metastases: experience from two European centers. ROFO-FORTSCHR RONTG 2014; 186:937-44. [PMID: 24729409 DOI: 10.1055/s-0034-1366081] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
PURPOSE Chemosaturation with percutaneous hepatic perfusion (PHP; Hepatic CHEMOSAT(®) Delivery System; Delcath Systems Inc, USA) is a minimally invasive, repeatable regional therapy for unresectable hepatic metastases. It uses a system of catheters and filters to isolate hepatic venous blood from the systemic circulation, allowing delivery of high-dose chemotherapy to the hepatic artery. Effluent hepatic venous blood is filtered before being returned to the systemic circulation, thereby reducing exposure to chemotherapy. We describe our experiences with chemosaturation-PHP at 2 European centers. MATERIALS AND METHODS 14 patients presented unresectable hepatic metastases from solid tumors; 13 received 1 - 3 sessions of chemosaturation-PHP. Melphalan 2.0 (n = 1) or 3.0 (n = 12) mg/kg was given as a 30-minute infusion into the hepatic artery. 12 patients were evaluable for tumor response. RESULTS One complete (cholangiocarcinoma, n = 1) and 6 partial responses (ocular, n = 3 or cutaneous melanoma, n = 3) were observed, 5 patients had stable disease (ocular melanoma, n = 3; breast cancer, n = 1; gastric cancer, n = 1). Mild to moderate filter-related toxicity (i. e. thrombocytopenia, anemia) was observed immediately post-procedure. Grade 3/4 melphalan-related pancytopenia developed after 1 - 2 weeks. All hematological events were managed effectively with transfusions and/or other supportive measures. The new high-efficiency filter showed milder toxicity and faster recovery. In one case, chemosaturation-PHP was abandoned prematurely due to heparin-induced vaginal bleeding, and one patient died due to retroperitoneal hemorrhage from heparin anti-coagulation. CONCLUSION Chemosaturation-PHP for non-resectable liver metastases is a feasible treatment option when performed by an experienced multi-disciplinary team. It may be a promising regional therapy for patients with no effective treatment options.
Collapse
|
39
|
Körtvelyessy P, Kluge C, Marquardt F, Knape S, Heinze HJ, Schmitt F. An adaptive strategy for detection of high-frequency oscillations in surface EEG/MEG recordings in an epilepsy patient. KLIN NEUROPHYSIOL 2014. [DOI: 10.1055/s-0034-1371249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
40
|
Santos A, Pereira D, Paredes J, Schmitt F, Gama A. N-Cadherin Expression in Canine Malignant Mammary Tumours. J Comp Pathol 2014. [DOI: 10.1016/j.jcpa.2013.11.152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
41
|
Farlow MR, Schmitt F, Aarsland D, Grossberg GT, Somogyi M, Meng X. Comparing clinical profiles in Alzheimer's disease and Parkinson's disease dementia. Dement Geriatr Cogn Dis Extra 2013; 3:281-90. [PMID: 24174923 PMCID: PMC3808221 DOI: 10.1159/000351861] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Background Greater understanding of differences in baseline impairment and disease progression in patients with Alzheimer's disease (AD) and Parkinson's disease dementia (PDD) may improve the interpretation of drug effects and the design of future studies. Methods This was a retrospective analysis of three randomized, double-blind rivastigmine databases (one in PDD, two in AD). Impairment on the Alzheimer's Disease Assessment Scale-cognitive subscale (ADAS-cog), Alzheimer's Disease Cooperative Study-Activities of Daily Living (ADCS-ADL) scale, 10-item Neuropsychiatric Inventory (NPI-10) and the ADCS-Clinical Global Impression of Change (CGIC) was compared [standardized difference (Cohen's d), similar if <0.1]. Results Patients with AD or PDD had similar levels of impairment on the ADAS-cog and NPI-10. Scores on the ADCS-ADL scale (standardized difference = 0.47) and the ADAS-cog memory domain (total, 0.33; items, 0.10-0.58) were higher in AD; PDD patients were more impaired in the language (0.23) and praxis (0.34) domains. AD patients receiving placebo showed greater deterioration on the ADAS-cog (0.14) and improvement on the NPI-10 (0.11) compared with patients with PDD. Conclusion Differing patterns of impairment occur in AD and PDD.
Collapse
|
42
|
Mathews M, Abner E, Caban-Holt A, Dennis BC, Kryscio R, Schmitt F. Quality of education and memory test performance in older men: the New York University Paragraph Recall Test normative data. Curr Alzheimer Res 2013; 10:776-83. [PMID: 23906000 PMCID: PMC4030724 DOI: 10.2174/15672050113109990140] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2012] [Accepted: 07/27/2013] [Indexed: 11/22/2022]
Abstract
OBJECTIVES Memory evaluation is a key component in the accurate diagnosis of cognitive disorders.One memory procedure that has shown promise in discriminating disease-related cognitive decline from normal cognitive aging is the New York University Paragraph Recall Test; however, the effects of education have been unexamined as they pertain to one's literacy level. The current study provides normative data stratified by estimated quality of education as indexed by irregular word reading skill. METHOD Conventional norms were derived from a sample (N = 385) of cognitively intact elderly men who were initially recruited for participation in the PREADViSE clinical trial. A series of multiple linear regression models were constructed to assess the influence of demographic variables on mean NYU Paragraph Immediate and Delayed Recall scores. RESULTS Test version, assessment site, and estimated quality of education were significant predictors of performance on the NYU Paragraph Recall Test. Findings indicate that estimated quality of education is a better predictor of memory performance than ethnicity and years of total education. Normative data stratified according to estimated quality of education are presented. DISCUSSION The current study provides evidence and support for normativedata stratified by quality of education as opposed to years of education.
Collapse
|
43
|
Smets Y, Stark CB, Lach S, Schmitt F, Wright CA, Wanke M, Ley L, Ziegler C, Pakes CI. Charge-induced distortion and stabilization of surface transfer doped porphyrin films. J Chem Phys 2013; 139:044703. [DOI: 10.1063/1.4815978] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
44
|
Jicha G, Panuganti P, Abner E, Nelson P, Schmitt F, Kryscio R, Van Eldik L, Smith C. P2–118: Neuopathologic substrate of clinically evident, asymmetric, hippocampal atrophy in Alzheimer's disease. Alzheimers Dement 2013. [DOI: 10.1016/j.jalz.2013.05.762] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
45
|
Kryscio R, Abner E, Fardo D, Nelson P, Jicha G, Smith C, Cooper G, Caban‐Holt A, Van Eldik L, Schmitt F. P4–178: Self‐reported memory decline predicts mild cognitive impairment and dementia. Alzheimers Dement 2013. [DOI: 10.1016/j.jalz.2013.05.1569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
46
|
Abner E, Nelson P, Schmitt F, Browning S, Fardo D, Wan L, Jicha G, Cooper G, Smith C, Caban‐Holt A, Van Eldik L, Kryscio R. O5–05–04: Self‐reported head injury and risk of cognitive impairment and Alzheimer's‐type pathology in a longitudinal Alzheimer's disease center cohort. Alzheimers Dement 2013. [DOI: 10.1016/j.jalz.2013.04.496] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
47
|
Abner E, Schmitt F, Kryscio R, Jicha G, Cooper G, Smith C, Fardo D, Van Eldik L, Gooding L. P4–241: Early‐to mid‐life formal training in music is associated with improved late‐life semantic and episodic memory among cognitively normal older adults. Alzheimers Dement 2013. [DOI: 10.1016/j.jalz.2013.05.1633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
|
48
|
Setsompop K, Kimmlingen R, Eberlein E, Witzel T, Cohen-Adad J, McNab JA, Keil B, Tisdall MD, Hoecht P, Dietz P, Cauley SF, Tountcheva V, Matschl V, Lenz VH, Heberlein K, Potthast A, Thein H, Van Horn J, Toga A, Schmitt F, Lehne D, Rosen BR, Wedeen V, Wald LL. Pushing the limits of in vivo diffusion MRI for the Human Connectome Project. Neuroimage 2013; 80:220-33. [PMID: 23707579 DOI: 10.1016/j.neuroimage.2013.05.078] [Citation(s) in RCA: 353] [Impact Index Per Article: 32.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2013] [Revised: 05/07/2013] [Accepted: 05/13/2013] [Indexed: 11/25/2022] Open
Abstract
Perhaps more than any other "-omics" endeavor, the accuracy and level of detail obtained from mapping the major connection pathways in the living human brain with diffusion MRI depend on the capabilities of the imaging technology used. The current tools are remarkable; allowing the formation of an "image" of the water diffusion probability distribution in regions of complex crossing fibers at each of half a million voxels in the brain. Nonetheless our ability to map the connection pathways is limited by the image sensitivity and resolution, and also the contrast and resolution in encoding of the diffusion probability distribution. The goal of our Human Connectome Project (HCP) is to address these limiting factors by re-engineering the scanner from the ground up to optimize the high b-value, high angular resolution diffusion imaging needed for sensitive and accurate mapping of the brain's structural connections. Our efforts were directed based on the relative contributions of each scanner component. The gradient subsection was a major focus since gradient amplitude is central to determining the diffusion contrast, the amount of T2 signal loss, and the blurring of the water PDF over the course of the diffusion time. By implementing a novel 4-port drive geometry and optimizing size and linearity for the brain, we demonstrate a whole-body sized scanner with G(max) = 300 mT/m on each axis capable of the sustained duty cycle needed for diffusion imaging. The system is capable of slewing the gradient at a rate of 200 T/m/s as needed for the EPI image encoding. In order to enhance the efficiency of the diffusion sequence we implemented a FOV shifting approach to Simultaneous MultiSlice (SMS) EPI capable of unaliasing 3 slices excited simultaneously with a modest g-factor penalty allowing us to diffusion encode whole brain volumes with low TR and TE. Finally we combine the multi-slice approach with a compressive sampling reconstruction to sufficiently undersample q-space to achieve a DSI scan in less than 5 min. To augment this accelerated imaging approach we developed a 64-channel, tight-fitting brain array coil and show its performance benefit compared to a commercial 32-channel coil at all locations in the brain for these accelerated acquisitions. The technical challenges of developing the over-all system are discussed as well as results from SNR comparisons, ODF metrics and fiber tracking comparisons. The ultra-high gradients yielded substantial and immediate gains in the sensitivity through reduction of TE and improved signal detection and increased efficiency of the DSI or HARDI acquisition, accuracy and resolution of diffusion tractography, as defined by identification of known structure and fiber crossing.
Collapse
|
49
|
Schmitt F, Caldari D, Corradini N, Gicquel P, Leclair MD, Podevin G. Tolérance et efficacité de la gastrostomie d’alimentation. Arch Pediatr 2013. [DOI: 10.1016/j.arcped.2013.02.052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
50
|
Robichon C, Annereau JP, Gomes B, Pillon A, de Vries L, Cussac D, Meyer N, Lamant L, Kruczynski A, Guilbaud N, Kluza J, Jendoubi M, Corazao-Rozas P, Andre F, Jonneaux A, Guerreschi P, Formstecher P, Mortier L, Marchetti PHI, Bozkurt E, Atmaca H, Uzunoglu S, Uslu R, Karaca B, Erenpreisa J, Jackson TR, Huna A, Salmina K, Innashkina I, Jankevics E, Townsend PA, Cragg MS, Atmaca H, Bozkurt E, Uzunoglu S, Uslu R, Karaca B, Ramos SP, Bin M, Neto MDS, Curvello R, de Souza ACS, Nunes M, Weiswald LB, Vrignaud P, Vacher S, Turlotte E, Richon S, Roman-Roman S, Bieche I, Dangles-Marie V, Morais-Santos F, Pinheiro C, Vieira A, Schmitt F, Paredes J, Baltazar F, Zhang T, Lee YW, Rui YF, Cheng TY, Li G, Sreelatha KH, Reshma RS, Veena S, Rakesh SN, Thara S, Jem P, Priya S, Veena S, Sreelatha KH, Reshma RS, Rakesh SN, Priya S. Poster session 5. Translational research. Ann Oncol 2013. [DOI: 10.1093/annonc/mdt047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|