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Gabriel Ziegler, Patrick Grabher, Alan Thompson, Daniel Altmann, Markus Hupp, John Ashburner, Karl Friston, Nikolaus Weiskopf, Armin Curt, Patrick Freund
OBJECTIVE: To quantify atrophy, demyelination, and iron accumulation over 2 years following acute spinal cord injury and to identify MRI predictors of clinical outcomes and determine their suitability as surrogate markers of therapeutic intervention. METHODS: We assessed 156 quantitative MRI datasets from 15 patients with spinal cord injury and 18 controls at baseline and 2, 6, 12, and 24 months after injury. Clinical recovery (including neuropathic pain) was assessed at each time point...
March 7, 2018: Neurology
Xian Hua Gao, Hanumant Chouhan, Gang Lei Liu, Nan Lan, Erick Remer, Luca Stocchi, Jean Ashburn, Tracy L Hull, Bo Shen
Background: There are no published studies on the impact of peripouch fat on pouch outcomes in inflammatory bowel disease (IBD) patients. Methods: Patients with pelvic MRI-DIXON scans from our prospectively maintained Pouch Database between 2002 and 2016 were evaluated. Peripouch fat area was measured on MRI-DIXON-F images at the middle height level of the pouch (area M) and the highest level of the pouch (area H). Results: Of all 1863 patients in the database, 197 eligible patients were included in this study...
March 1, 2018: Inflammatory Bowel Diseases
Nan Lan, Luca Stocchi, Jean H Ashburn, Tracy L Hull, Scott R Steele, Conor P Delaney, Bo Shen
BACKGROUND & AIMS: Few studies have compared endoscopic balloon dilation (EBD) with ileocolic resection (ICR) in the treatment of primary ileocolic strictures in patients with Crohn's disease (CD). METHODS: We performed a retrospective study to compare post-procedure morbidity and surgery-free survival among 258 patients with primary stricturing ileo (colic) CD (B2, L1, or L3) initially treated with primary EBD (n=117) or ICR (n=258) from 2000 through 2016. Patients with penetrating disease were excluded from the study...
March 2, 2018: Clinical Gastroenterology and Hepatology
Sherief Shawki, Jean Ashburn, Steven A Signs, Emina Huang
Colitis-associated cancer is a relatively rare form of cancer with an unclear pathogenesis. Colitis-associated cancer serves as a prototype of inflammation-associated cancers. Advanced colonoscopic techniques are considered standard of care for surveillance in patients with long-standing colitis, especially those with other risk factors, including sclerosing cholangitis and a family history of colorectal cancer. When colitis-associated cancer is diagnosed, the standard operation involves total proctocolectomy...
April 2018: Surgical Oncology Clinics of North America
Sanja Percac-Lima, Jeffrey M Ashburner, Nancy A Rigotti, Elyse R Park, Yuchiao Chang, Salome Kuchukhidze, Steven J Atlas
Annual chest computed tomography (CT) can decrease lung cancer mortality in high-risk individuals. Patient navigation improves cancer screening rates in underserved populations. Randomized controlled trial was conducted from February 2016 to January 2017 to evaluate the impact of a patient navigation program on lung cancer screening (LCS) among current smokers in five community health centers (CHCs) affiliated with an academic primary care network. We randomized 1200 smokers aged 55-77 years to intervention (n = 400) or usual care (n = 800)...
February 21, 2018: Cancer Medicine
Harith Akram, Viswas Dayal, Philipp Mahlknecht, Dejan Georgiev, Jonathan Hyam, Thomas Foltynie, Patricia Limousin, Enrico De Vita, Marjan Jahanshahi, John Ashburner, Tim Behrens, Marwan Hariz, Ludvic Zrinzo
The ventral intermediate nucleus (VIM) of the thalamus is an established surgical target for stereotactic ablation and deep brain stimulation (DBS) in the treatment of tremor in Parkinson's disease (PD) and essential tremor (ET). It is centrally placed on a cerebello-thalamo-cortical network connecting the primary motor cortex, to the dentate nucleus of the contralateral cerebellum through the dentato-rubro-thalamic tract (DRT). The VIM is not readily visible on conventional MR imaging, so identifying the surgical target traditionally involved indirect targeting that relies on atlas-defined coordinates...
2018: NeuroImage: Clinical
Gursimran Kochhar, Preston Edge, Courtney Blomme, Xian-Rui Wu, Rocio Lopez, Jean Ashburn, Bo Shen
Background: Clostridium difficile infection (CDI) is traditionally considered a colon-affecting disease with frequent pseudomembrane formation. However, multiple case reports have documented the existence of CDI in the small bowel, and the literature on outcome of C difficile enteropathy (CDE) is sparse. The aims of our study are to identify risk factors and to assess patient-related outcomes associated with CDE. Methods: This is a case-control study involving 112 patients at our tertiary care center...
January 18, 2018: Inflammatory Bowel Diseases
Aisha James, Seth A Berkowitz, Jeffrey M Ashburner, Yuchiao Chang, Daniel M Horn, Sandra M O'Keefe, Steven J Atlas
BACKGROUND: Healthcare systems use population health management programs to improve the quality of cardiovascular disease care. Adding a dedicated population health coordinator (PHC) who identifies and reaches out to patients not meeting cardiovascular care goals to these programs may help reduce disparities in cardiovascular care. OBJECTIVE: To determine whether a program that used PHCs decreased racial/ethnic disparities in LDL cholesterol and blood pressure (BP) control...
January 8, 2018: Journal of General Internal Medicine
O A Lavryk, T L Hull, L C Duraes, L Stocchi, J H Ashburn, D Liska, E Gorgun, H Kessler
BACKGROUND: The aim of the present study was to assess the short-term and long-term consequences of diverting loop ileostomy (DLI) omission in ileal pouch-anal anastomosis (IPAA) surgery complicated by postoperative pelvic sepsis. METHODS: This was a retrospective review of a prospectively maintained database. Of 4031 patients who underwent IPAA in 1983-2014, 357 developed IPAA-related pelvic sepsis with or without anastomotic dehiscence. Patients with Crohn's disease or cancer were excluded...
December 28, 2017: Techniques in Coloproctology
Jeffrey M Ashburner, Daniel M Horn, Sandra M O'Keefe, Adrian H Zai, Yuchiao Chang, Neil W Wagle, Steven J Atlas
OBJECTIVES: We implemented a health information technology-enabled population health management program for chronic disease management in academic hospital-affiliated primary care practices, then compared quality-of-care outcome measures among practices assigned a central population health coordinator (PHC) and those not assigned a PHC. STUDY DESIGN: Quasi-experimental. METHODS: Central PHCs were nonrandomly assigned to 8 of 18 practices. They met with physicians, managed lists of patients not at goal in chronic disease registries, and performed administrative tasks...
December 2017: American Journal of Managed Care
Michael A Ashburn, Lee A Fleisher
No abstract text is available yet for this article.
December 13, 2017: JAMA Surgery
Elizabeth Costenbader, Rachel Lenzi, Rebecca B Hershow, Kim Ashburn, Donna R McCarraher
As a critical building block to developing social norms interventions to support healthy family planning and other reproductive health behaviors, we conducted a literature review to identify and evaluate social norm measures related to modern contraceptive use. Of 174 articles reviewed in full, only 17 studies met our criteria for inclusion. Across these articles, no single measure of norms was used in more than one study; failure to specify the boundaries of who was engaging in and influencing the behaviors of interest contributed to the variation...
December 2017: Studies in Family Planning
Luke McEllin, G√ľnther Knoblich, Natalie Sebanz
When performing joint actions, people modulate instrumental actions to provide additional information for a coactor (Pezzulo, Donnarumma, & Dindo, 2013). Similarly, demonstrators adjust instrumental actions to make them more informative for novice learners (Brand, Baldwin, & Ashburn, 2002). It is unknown whether the kinematic modulations performed to facilitate prediction in joint action coordination and the modulations performed to transmit information about the structure of novel actions are unique, or whether a general type of modulation can take on multiple functions...
November 20, 2017: Journal of Experimental Psychology. Human Perception and Performance
Lei Lian, Jean Ashburn, Erick M Remer, Feza H Remzi, Manoj Monga, Bo Shen
BACKGROUND: There are scant published data in the impact of prostate cancer and its treatment on functional outcomes and quality of life (QOL) in patients with ileal pouch-anal anastomosis (IPAA). The aim of the study was to evaluate the influence of prostate cancer and its treatment on functional outcomes and QOL in patients with IPAA. METHODS: Patients with IPAA with prostate cancer were compared to age and pouch duration-matched controls without prostate cancer in a 1:2 ratio...
December 2017: Inflammatory Bowel Diseases
Claudia Blaiotta, Patrick Freund, M Jorge Cardoso, John Ashburner
In this paper we present a hierarchical generative model of medical image data, which can capture simultaneously the variability of both signal intensity and anatomical shapes across large populations. Such a model has a direct application for learning average-shaped probabilistic tissue templates in a fully automated manner. While in principle the generality of the proposed Bayesian approach makes it suitable to address a wide range of medical image computing problems, our work focuses primarily on neuroimaging applications...
February 1, 2018: NeuroImage
Harith Akram, Sarah Miller, Susie Lagrata, Marwan Hariz, John Ashburner, Tim Behrens, Manjit Matharu, Ludvic Zrinzo
OBJECTIVE: To investigate the mechanism of action of deep brain stimulation for refractory chronic cluster headache and the optimal target within the ventral tegmental area. METHODS: Seven patients with refractory chronic cluster headache underwent high spatial and angular resolution diffusion MRI preoperatively. MRI-guided and MRI-verified electrode implantation was performed unilaterally in 5 patients and bilaterally in 2. Volumes of tissue activation were generated around active lead contacts with a finite-element model...
November 14, 2017: Neurology
Peter Langhorne, Olivia Wu, Helen Rodgers, Ann Ashburn, Julie Bernhardt
BACKGROUND: Mobilising patients early after stroke [early mobilisation (EM)] is thought to contribute to the beneficial effects of stroke unit care but it is poorly defined and lacks direct evidence of benefit. OBJECTIVES: We assessed the effectiveness of frequent higher dose very early mobilisation (VEM) after stroke. DESIGN: We conducted a parallel-group, single-blind, prospective randomised controlled trial with blinded end-point assessment using a web-based computer-generated stratified randomisation...
September 2017: Health Technology Assessment: HTA
D Kunkel, C Fitton, L Roberts, R M Pickering, H C Roberts, R Wiles, S Hulbert, J Robison, A Ashburn
OBJECTIVE: To determine the feasibility of a Dance Centre delivering a programme of mixed dances to people with Parkinson's and identify suitable outcomes for a future definitive trial. DESIGN: A two-group randomized controlled feasibility trial. METHODS: People with Parkinson's were randomized to a control or experimental group (ratio 15:35), alongside usual care. In addition, participants in the experimental group danced with a partner for one hour, twice-a-week for 10 weeks; professional dance teachers led the classes and field-notes were kept...
October 2017: Clinical Rehabilitation
Qingbo Wang, Chaoping Liang, Yongping Zheng, Nickolas Ashburn, Young Jun Oh, Fantai Kong, Chenxi Zhang, Yifan Nie, Jian Sun, Kaihua He, Yu Ye, Rong Chen, Bin Shan, Kyeongjae Cho
Transition metal (TM) modification is a common strategy for converting an earth-abundant mineral into a cost-effective catalyst for industrial applications. Among a variety of minerals, Al2SiO5, which has three phases, andalusite, sillimanite and kyanite, is emerging as a promising candidate for new catalyst development. In this paper, we use Mn to demonstrate the rationale of 3d TM doping at the Al sites in each of these three phases through first-principles calculations and the cluster expansion method. The results of cluster expansion show that Mn has a strong site preference for the six-coordinated Al octahedral chains in the andalusite and sillimanite phases, while distributing randomly in the kyanite phase...
September 20, 2017: Physical Chemistry Chemical Physics: PCCP
Ioannis Zeimpekis, Konstantinos I Papadimitriou, Kai Sun, Chunxiao Hu, Peter Ashburn, Hywel Morgan, Themistoklis Prodromakis
We present a complete biosensing system that comprises a Thin Film Transistor (TFT)-based nanoribbon biosensor and a low noise, high-performance bioinstrumentation platform, capable of detecting sub-30 mpH unit changes, validated by an enzymatic biochemical reaction. The nanoribbon biosensor was fabricated top-down with an ultra-thin (15 nm) polysilicon semiconducting channel that offers excellent sensitivity to surface potential changes. The sensor is coupled to an integrated circuit (IC), which combines dual switched-capacitor integrators with high precision analog-to-digital converters (ADCs)...
September 1, 2017: Sensors
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