76
|
Haroon K, Arafeh A, Martin P, Rodgers T, Mendoza Ć, Baker M. Use of inline near-infrared spectroscopy to predict the viscosity of shampoo using multivariate analysis. Int J Cosmet Sci 2019; 41:346-356. [PMID: 31045248 PMCID: PMC6852037 DOI: 10.1111/ics.12536] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Accepted: 04/24/2019] [Indexed: 11/30/2022]
Abstract
Objective In the personal care industry, viscosity is a critical quality attribute that influences product quality and process economics. Like many industrial liquids, personal care liquids are complex non‐Newtonian liquids made up of aqueous surfactant systems whose viscosity depends on the build‐up of micellar networks. Measuring the viscosity of complex liquids offline is easily done using benchtop rheometers and viscometers. The challenge lies in measuring the viscosity of personal care liquids online during manufacturing. Being able to track the viscosity of such products through their manufacturing cycle will not only allow for better process control but also more enhanced quality control. Therefore, the aim of this work was to investigate how proxy measurements using inline near‐infrared (NIR) spectroscopy in transmission mode can be used to predict the viscosity of shampoo. NIR spectroscopy has not, to the best our knowledge, been used to predict the viscosity of complex surfactant systems like shampoo and could significantly affect the way quality is monitored in a manufacturing environment. Method This work focuses on viscosity changes because of differences in chloride content as salt is often used to adjust viscosity. The relationship between salt content and the viscosity of shampoo is well known following the salt curve. From an industrial perspective the region of interest for the formulation studied in this work only covers a small section of this curve. Therefore, two predictive models were developed: one covering the full range of the salt curve and another focusing on the industrially applicable region. Result Models were produced using partial least squares (PLS) where both datasets showed some predictive ability with the concentrated region of interest showing enhanced performance [root mean square error of prediction (RMSEP) – 2.32 Pa s] compared with the larger range (RMSEP – 4.44 Pa s). Conclusion This work provides a good starting point for developing robust predictive models for in situ viscosity measurements for shampoo manufacturing, where further work into different sources of variation and the extent of the modelling capability with regards to different formulations should be studied.
Collapse
|
77
|
Hill B, Switchenko J, Martin P, Churnetski M, Sawalha Y, Goyal S, Shanmugasundaram K, Calzada O, Kolla B, Bachanova V, Gerson J, Barta S, Maldonado E, Gordon M, Danilov A, Grover N, Mathews S, Burkart M, Karmali R, Ghosh N, Park S, Epperla N, Bond D, Badar T, Blum K, Guo J, Hamadani M, Fenske T, Malecek M, Maddocks K, Flowers C, Kahl B, Cohen J. MAINTENANCE RITUXIMAB IS ASSOCIATED WITH IMPROVED OVERALL SURVIVAL IN MANTLE CELL LYMPHOMA PATIENTS RESPONDING TO INDUCTION THERAPY WITH BENDAMUSTINE + RITUXIMAB (BR). Hematol Oncol 2019. [DOI: 10.1002/hon.75_2631] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
78
|
Ruan J, Leonard J, Coleman M, Rutherford S, Van Besien K, Rodriguez A, Benderoff L, Mehta-Shah N, Moskowitz A, Sokol L, Cerchietti L, Inghirami G, Martin P. MULTI-CENTER PHASE II STUDY OF ORAL AZACITIDINE (CC-486) PLUS CHOP AS INITIAL TREATMENT FOR PERIPHERAL T-CELL LYMPHOMA. Hematol Oncol 2019. [DOI: 10.1002/hon.8_2632] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
79
|
Bond D, Switchenko J, Maddocks K, Churnetski M, Goyal S, Shanmugasundaram K, Calzada O, Kolla B, Bachanova V, Gerson J, Barta S, Hill B, Salwaha Y, Martin P, Maldonado E, Gordon M, Danilov A, Grover N, Mathews S, Burkart M, Karmali R, Ghosh N, Park S, Epperla N, Badar T, Guo J, Hamadani M, Fenske T, Malecek M, Kahl B, Flowers C, Blum K, Cohen J. OUTCOMES FOR PATIENTS WITH MANTLE CELL LYMPHOMA EXPERIENCING FRONTLINE TREATMENT FAILURE: A MULTICENTER RETROSPECTIVE STUDY. Hematol Oncol 2019. [DOI: 10.1002/hon.77_2631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
80
|
Ardeshir-Larijani F, Nelson AA, Martin P, Mendiratta P, Sloan AE, Choi S, Mansur DB, Hoimes CJ. Outcomes of melanoma patients with brain metastases receiving immune checkpoint inhibitor (ICI) therapy. J Clin Oncol 2019. [DOI: 10.1200/jco.2019.37.15_suppl.e21028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
e21028 Background: The effect of ICI therapy on brain metastasis (mets) in melanoma patients has been described, however the impact of genomic alterations and local treatment (trt) including radiation therapy (RT) on CNS outcomes and overall survival (OS) has not yet been explored. Methods: Under institutional IRB approval, we reviewed our electronic medical record to identify patients (pts) with metastatic melanoma and brain mets who received trt with ICI. Trt history, CNS responses as indicated by the treating physician and available genomic data were recorded. OS was estimated using a multivariable Cox regression model adjusting for genomic alteration, age, ICI regimen and brain mets. Results: A total of 49 pts were identified (65% male). Thirty seven pts had testing for tumor genomic alterations (alt, hotspot and comprehensive genomic testing); BRAFV600E( 30%), cKIT(5%), NRAS(16%), no alt (38%). Prior to initiation of ICI, 78% had known CNS mets, of these, 61% received RT. There was no difference in median OS for pts who started RT prior to ICI compared to those without RT (mOS = 75.71 vs 49.4 weeks, p = 0.75). Median OS was improved for those pts who received RT > 90 days prior to initiation of ICI trt however this was not statistically significant (45.7 vs 136 weeks, p = 0.12) and HR = 0.45 (95% CI 0.08, 2.36). OS was not significantly different in pts with genomic alterations compared with those without alterations (p = 0.264). Of the pts with known brain mets at the time of ICI start, 34% had progressive disease at 3 months and 11% were felt to have pseudoprogression. 18% survived to undergo 6-month disease assessment, of these 12% had further progression. All pts with cKIT mutations survived to 6-month disease assessment. 75% of pts with known brain mets developed new lesions, 15% had increased mass size. Pts who developed new brain mets while on trt with ICI had worse survival than those with preexisting brain mets and developed new brain lesions (28 vs 58 weeks, p = 0.05). 6% of all pts developed CNS immune related adverse effects. Conclusions: Most patients with melanoma and known brain metastasis prior to ICI developed new brain lesions as a site of metastatic spread. The development of new brain mets was associated with worse outcomes. Neither genomic alterations nor RT prior to ICI start were associated with improved survival.
Collapse
|
81
|
Martin P, o'Leary E, Deady S, Horgan AM. Treatment approaches and survival outcomes of older patients with locally advanced esophageal cancer (LAEC) in Ireland. J Clin Oncol 2019. [DOI: 10.1200/jco.2019.37.15_suppl.e23034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
e23034 Background: Neo+/- adjuvant treatment data in older patients with cancer is sparse due to exclusion of this population from clinical trials. We evaluated the management of locally advanced esophagogastric cancer (LAEC) in older Irish patients to determine treatment modalities utilized and identify factors associated with survival. Methods: Patients diagnosed with LAEC (stage II or III) over a 5 year period (2007-2011)were identified from the National Cancer Registry of Ireland. Follow-up was till end 2014.Demographic characteristicswere assessed. Treatment was classified as “best supportive care (BSC)”, “surgery only”, “neo/adjuvant treatment” and “chemo/radiation alone” (ie chemo, radiotherapy or chemoradiotherapy alone in the absence of surgery).Survival was estimated by Kaplan-Meier estimates and Cox models. Clinicopathologic factors and treatment type found to be significant in univariate analysis were included in a multivariate analysis (MVA). Results: 46%(n = 580) of the 1,251 patients were ≥70yrs, 62% had stage III disease and 51% had gastric cancer. 11% (n = 134) received BSC, 23% (n = 288) had surgery only, 31%(n = 390) had chemo/radiation alone, 35% (n = 439) had neo/adjuvant treatment. 20% (n = 39) of patients ≥75yrs had neoadjuvant treatment compared to 46% < 75 yrs. No patient ≥80yrs received neo/adjuvant treatment. With increasing age patients were less likely to receive neo/adjuvant treatment (p < 0.001), less likely to receive surgery (p < 0.001) and less likely to receive any treatment (p < 0.001).Median survival(OS) decreased with age (< 70yrs: 23months; 70-74: 19months; 75-79:13months; ≥80 years:10 months). In MVA, older age, smoking, later stage, higher grade were significantly associated with a higher risk of death.Including an interaction between treatment and age, patients receiving adjuvant or neoadjuvant treatment had lower risk of death than any other treatment group regardless of age. Conclusions: Older patients were less likely to receive any treatment for LAEC than younger patients. Patients ≥70 years benefit from neo/adjuvant treatment, however,these patients are often excluded based on age. Prospective clinical trials focusing on elderly patients and incorporating life expectancy, comorbidities and geriatric assessment are needed to best guide treatment.
Collapse
|
82
|
Sapone M, Martin P, Chateau H, Parmentier J, Mansour KB, Marin F. Sizing of inertial sensors adapted to measurement of locomotor parameters in horses using motion capture. Comput Methods Biomech Biomed Engin 2019. [DOI: 10.1080/10255842.2020.1713497] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
83
|
Boyd-Carson H, Doleman B, Herrod PJJ, Anderson ID, Williams JP, Lund JN, Tierney GM, Murray D, Hare S, Lockwood S, Oliver CM, Spurling LJ, Poulton T, Johnston C, Cromwell D, Kuryba A, Martin P, Lourtie J, Goodwin J, Mooesinghe R, Eugene N, Catrin-Cook S, Anderson I. Association between surgeon special interest and mortality after emergency laparotomy. Br J Surg 2019; 106:940-948. [DOI: 10.1002/bjs.11146] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Revised: 01/07/2019] [Accepted: 01/31/2019] [Indexed: 11/07/2022]
Abstract
Abstract
Background
Approximately 30 000 emergency laparotomies are performed each year in England and Wales. Patients with pathology of the gastrointestinal tract requiring emergency laparotomy are managed by general surgeons with an elective special interest focused on either the upper or lower gastrointestinal tract. This study investigated the impact of special interest on mortality after emergency laparotomy.
Methods
Adult patients having emergency laparotomy with either colorectal or gastroduodenal pathology were identified from the National Emergency Laparotomy Audit database and grouped according to operative procedure. Outcomes included all-cause 30-day mortality, length of hospital stay and return to theatre. Logistic and Poisson regression were used to analyse the association between consultant special interest and the three outcomes.
Results
A total of 33 819 patients (28 546 colorectal, 5273 upper gastrointestinal (UGI)) were included. Patients who had colorectal procedures performed by a consultant without a special interest in colorectal surgery had an increased adjusted 30-day mortality risk (odds ratio (OR) 1·23, 95 per cent c.i. 1·13 to 1·33). Return to theatre also increased in this group (OR 1·13, 1·05 to 1·20). UGI procedures performed by non-UGI special interest surgeons carried an increased adjusted risk of 30-day mortality (OR 1·24, 1·02 to 1·53). The risk of return to theatre was not increased (OR 0·89, 0·70 to 1·12).
Conclusion
Emergency laparotomy performed by a surgeon whose special interest is not in the area of the pathology carries an increased risk of death at 30 days. This finding potentially has significant implications for emergency service configuration, training and workforce provision, and should stimulate discussion among all stakeholders.
Collapse
|
84
|
Martin P, Muller E, Paulus C. Alteration of facial growth after radiotherapy: orthodontic, surgical and prosthetic rehabilitation. JOURNAL OF STOMATOLOGY, ORAL AND MAXILLOFACIAL SURGERY 2019; 120:369-372. [PMID: 30980947 DOI: 10.1016/j.jormas.2019.04.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Revised: 04/02/2019] [Accepted: 04/03/2019] [Indexed: 11/26/2022]
Abstract
Most patients treated in childhood with radiotherapy for head and neck tumors develop craniofacial alterations related to impaired growth of the irradiated regions. These deformities have a significant functional and aesthetic impact, generating physiological and social troubles. The therapeutic solutions are mostly surgical and multidisciplinary. In this article, we describe the orthodontic and surgical care of a teenager treated with radiotherapy for a bilateral retinoblastoma at the age of 8 month and a half. The patient presented growth defects of the middle third of the face. These growth deficiencies are at the origin of significant aesthetic and physical disorders. Moreover, the three-dimensional skeletal abnormalities and the histological changes of these irradiated tissues make surgical management of the cases complex and specific.
Collapse
|
85
|
Ye R, Martin P, Caimi P, Kolk M, Metheny L, de Lima M, Malek E. Maintenance Therapy after Autologous Stem Cell Transplant Is Associated with Less Biochemical Relapse in Multiple Myeloma Patients. Biol Blood Marrow Transplant 2019. [DOI: 10.1016/j.bbmt.2018.12.616] [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]
|
86
|
Couture-Cossette A, Morand M, Vinh DC, Gratton M, Martin P. Severe disseminated Nocardia infection associated with ustekinumab treatment for psoriasis. Br J Dermatol 2019; 181:194-195. [PMID: 30657168 DOI: 10.1111/bjd.17642] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
87
|
Ryskaliyeva A, Krupova Z, Henry C, Faye B, Konuspayeva G, Martin P. Comprehensive proteomic analysis of camel milk-derived extracellular vesicles. INTERNATIONAL JOURNAL OF BIOLOGY AND CHEMISTRY 2019. [DOI: 10.26577/ijbch-2019-v2-12] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|
88
|
Ryskaliyeva A, Krupova Z, Henry C, Faye B, Konuspayeva G, Martin P. Comprehensive proteomic analysis of camel milk-derived extracellular vesicles. INTERNATIONAL JOURNAL OF BIOLOGY AND CHEMISTRY 2019. [DOI: 10.26577/ijbch-2019-i2-12] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|
89
|
Lancini D, Prasad S, Boots R, Guppy-Coles K, Atherton J, Martin P. Echocardiographic Findings in Critically Unwell Patients with New-Onset Atrial Fibrillation. Heart Lung Circ 2019. [DOI: 10.1016/j.hlc.2019.06.183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
90
|
Fang ZH, Bovenhuis H, van Valenberg HJF, Martin P, Duchemin SI, Huppertz T, Visker MHPW. Genome-wide association study for α S1- and α S2-casein phosphorylation in Dutch Holstein Friesian. J Dairy Sci 2018; 102:1374-1385. [PMID: 30580950 DOI: 10.3168/jds.2018-15593] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Accepted: 10/03/2018] [Indexed: 12/13/2022]
Abstract
Phosphorylation of caseins (CN) is a crucial post-translational modification that allows caseins to form colloid particles known as casein micelles. Both αS1- and αS2-CN show varying degrees of phosphorylation (isoforms) in cow milk and were suggested to be more relevant for stabilizing internal micellar structure than β- and κ-CN. However, little is known about the genetic background of individual αS2-CN phosphorylation isoforms and the phosphorylation degrees of αS1- and αS2-CN (αS1-CN PD and αS2-CN PD), defined as the proportion of isoforms with higher degrees of phosphorylation in total αS1- and αS2-CN, respectively. We aimed to identify genomic regions associated with these traits using 50K single nucleotide polymorphisms for 1,857 Dutch Holstein Friesian cows. A total of 10 quantitative trait loci (QTL) regions were identified for all studied traits on 10 Bos taurus autosomes (BTA1, 2, 6, 9, 11, 14, 15, 18, 24, and 28). Regions associated with multiple traits were found on BTA1, 6, 11, and 14. We showed 2 QTL regions on BTA1, one affecting αS2-CN production and the other harboring the SLC37A1 gene, which encodes a phosphorus antiporter and affects αS1- and αS2-CN PD. The QTL on BTA6 harbors the casein gene cluster and affects individual αS2-CN phosphorylation isoforms. The QTL on BTA11 harbors the PAEP gene that encodes for β-lactoglobulin and affects relative concentrations of αS2-CN-10P and αS2-CN-11P as well as αS1-CN PD and αS2-CN PD. The QTL on BTA14 harbors the DGAT1 gene and affects relative concentrations of αS2-CN-10P and αS2-CN-11P as well as αS1-CN PD and αS2-CN PD. Our results suggest that effects of identified genomic regions on phosphorylation of αS1- and αS2-CN are related to changes in milk synthesis and phosphorus secretion in milk. The actual roles of SLC37A1, PAEP, and DGAT1 in αS1- and αS2-CN phosphorylation in Dutch Holstein Friesian require further investigation.
Collapse
|
91
|
Martin P, Poon L. COMORBIDITY, COGNITION AND PSYCHOLOGICAL WELL-BEING AMONG THE OLDEST OLD. Innov Aging 2018. [DOI: 10.1093/geroni/igy023.2772] [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
|
92
|
Kim J, Jasper A, Martin P, Russell D. LATENT PROFILES OF HEALTH PERSONALITY. Innov Aging 2018. [DOI: 10.1093/geroni/igy031.3577] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
93
|
Martin P, Poon LW, Ann Johnson M. COMORBIDITY AND PSYCHOLOGICAL WELL-BEING AMONG OLDEST OLD ADULTS. Innov Aging 2018. [DOI: 10.1093/geroni/igy023.2773] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
94
|
Poon L, Martin P, Kheibek RE, Willcox B. IMPACT AND MEASUREMENT ISSUES OF COMORBIDITY AMONG THE OLDEST OLD. Innov Aging 2018. [DOI: 10.1093/geroni/igy023.2774] [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
|
95
|
Harrison Joynt M, Martin P, Poon L. GENDER DIFFERENCES AND SIMILARITIES AMONG OLDEST OLD ADULTS: A STUDY OF PERSONALITY, SOCIAL SUPPORT AND DISABLEMENT. Innov Aging 2018. [DOI: 10.1093/geroni/igy023.1052] [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
|
96
|
Campbell R, Woodard J, Miller L, Davey A, Martin P, Poon L. SENSORY IMPAIRMENT IS RELATED TO BETTER MEMORY PERFORMANCE IN THE FULD OBJECT MEMORY EVALUATION. Innov Aging 2018. [DOI: 10.1093/geroni/igy023.423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
|
97
|
Lee G, Martin P. CHANGES IN DEPRESSIVE SYMPTOMS FOR THREE CENTENARIAN COHORTS. Innov Aging 2018. [DOI: 10.1093/geroni/igy023.1793] [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
|
98
|
Kheirbek R, Martin P, Willcox B, Poon LW. THE IMPACT OF MULTI-MORBIDITY ON COGNITIVE FUNCTION AND DEMENTIA IN THE OLDEST OLD. Innov Aging 2018. [DOI: 10.1093/geroni/igy023.2776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
99
|
Kotikalapudi R, Martin P, Marquetand J, Lindig T, Bender B, Focke NK. Systematic Assessment of Multispectral Voxel-Based Morphometry in Previously MRI-Negative Focal Epilepsy. AJNR Am J Neuroradiol 2018; 39:2014-2021. [PMID: 30337431 DOI: 10.3174/ajnr.a5809] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2018] [Accepted: 08/06/2018] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Voxel-based morphometry is widely used for detecting gray matter abnormalities in epilepsy. However, its performance with changing parameters, smoothing and statistical threshold, is debatable. More important, the potential yield of combining multiple MR imaging contrasts (multispectral voxel-based morphometry) is still unclear. Our aim was to objectify smoothing and statistical cutoffs and systematically compare the performance of multispectral voxel-based morphometry with existing T1 voxel-based morphometry in patients with focal epilepsy and previously negative MRI. MATERIALS AND METHODS 3D T1-, T2-, and T2-weighted FLAIR scans were acquired for 62 healthy volunteers and 13 patients with MR imaging negative for focal epilepsy on a Magnetom Skyra 3T scanner with an isotropic resolution of 0.9 mm3. We systematically optimized the main voxel-based morphometry parameters, smoothing level and statistical cutoff, with T1 voxel-based morphometry as a reference. As a next step, the performance of multispectral voxel-based morphometry models, T1+T2, T1+FLAIR, and T1+T2+FLAIR, was compared with that of T1 voxel-based morphometry using gray matter concentration and gray matter volume analysis. RESULTS We found the best performance of T1 at 12 mm and a T-threshold (statistical cutoff) of 3.7 for gray matter concentration analysis. When we incorporated these parameters, after expert visual interpretation of concordant and discordant findings, we identified T1+FLAIR as the best model with a concordant rate of 46.2% and a concordant rate/discordant rate of 1.20 compared with T1 with 30.8% and 0.67, respectively. Visual interpretation of voxel-based morphometry findings decreased concordant rates from 38.5%-46.2% to 15.4%-46.2% and discordant rates from 53.8%-84.6% to 30.8%-46.2% and increased specificity across models from 33.9%-40.3% to 46.8%-54.8%. CONCLUSIONS Multispectral voxel-based morphometry, especially T1+FLAIR, can yield superior results over single-channel T1 in focal epilepsy patients with a negative conventional MR imaging.
Collapse
|
100
|
Md Nordin N, Martin P, Bishop A. STRESS, COPING BEHAVIORS, AND LONELINESS IN UNMARRIED OLDER ADULTS. Innov Aging 2018. [DOI: 10.1093/geroni/igy023.986] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|