A comprehensive model-assisted brain shift correction approach in image-guided neurosurgery: a case study in brain swelling and subsequent sag after craniotomy

2019 ◽  
Author(s):  
Ma Luo ◽  
Sarah F. Frisken ◽  
Saramati Narasimhan ◽  
Logan W. Clements ◽  
Reid C. Thompson ◽  
...  
Keyword(s):  
Comprehensive Model ◽  
Brain Shift ◽  
Brain Swelling ◽  
Image Guided

scholarly journals Modelling Sustainable Industrial Symbiosis

Energies ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 1172
Author(s):  
Hafiz Haq ◽  
Petri Välisuo ◽  
Seppo Niemi
Keyword(s):  
Life Cycle ◽  
Waste Management ◽  
Environmental Performance ◽  
Life Cycle Cost ◽  
Economic Assessment ◽  
Environmental Benefits ◽  
Industrial Symbiosis ◽  
Comprehensive Model ◽  
Network Connections

Industrial symbiosis networks conventionally provide economic and environmental benefits to participating industries. However, most studies have failed to quantify waste management solutions and identify network connections in addition to methodological variation of assessments. This study provides a comprehensive model to conduct sustainable study of industrial symbiosis, which includes identification of network connections, life cycle assessment of materials, economic assessment, and environmental performance using standard guidelines from the literature. Additionally, a case study of industrial symbiosis network from Sodankylä region of Finland is implemented. Results projected an estimated life cycle cost of €115.20 million. The symbiotic environment would save €6.42 million in waste management cost to the business participants in addition to the projected environmental impact of 0.95 million tonne of CO2, 339.80 tonne of CH4, and 18.20 tonne of N2O. The potential of further cost saving with presented optimal assessment in the current architecture is forecast at €0.63 million every year.

scholarly journals Neurosurgery and brain shift: review of the state of the art and main contributions of robotics

TecnoLógicas ◽  
2017 ◽  
Vol 20 (40) ◽  
pp. 125-138
Author(s):  
Karin Correa-Arana ◽  
Oscar A. Vivas-Albán ◽  
José M. Sabater-Navarro
Keyword(s):  
Brain Tumor ◽  
State Of The Art ◽  
Image Guided Surgery ◽  
Medical Procedures ◽  
Brain Shift ◽  
Future Perspectives ◽  
Guided Surgery ◽  
Image Guided ◽  
Neuronavigation System ◽  
Minimal Invasion

This paper presents a review about neurosurgery, robotic assistants in this type of procedure, and the approach to the problem of brain tissue displacement, including techniques for obtaining medical images. It is especially focused on the phenomenon of brain displacement, commonly known as brain shift, which causes a loss of reference between the preoperative images and the volumes to be treated during image-guided surgery. Hypothetically, with brain shift prediction and correction for the neuronavigation system, minimal invasion trajectories could be planned and shortened. This would reduce damage to functional tissues and possibly lower the morbidity and mortality in delicate and demanding medical procedures such as the removal of a brain tumor. This paper also mentions other issues associated with neurosurgery and shows the way robotized systems have helped solve these problems. Finally, it highlights the future perspectives of neurosurgery, a branch of medicine that seeks to treat the ailments of the main organ of the human body from the perspective of many disciplines.

Customer Loyalty in Financial Sector: A case study of Commercial Banks in Southern Punjab

2014 ◽  
Vol 1 (1) ◽  
pp. 587 ◽  
Author(s):  
Syed Usman Ali Gillani ◽  
Dr. Abdul Ghafoor Awan
Keyword(s):  
Customer Satisfaction ◽  
Service Quality ◽  
Customer Service ◽  
Customer Loyalty ◽  
Commercial Banks ◽  
Perceived Value ◽  
Financial Sector ◽  
Business Environment ◽  
Comprehensive Model

By considering the intense competitiveness and prevalent challenges in the current business environment, organizations can’t survive just focusing on attracting and capturing new customer but they have to choose the strategy that help in retaining the existing customers and enhanced their loyalty to the organization. So, in the customer service based industry, satisfied customers are no longer suitable, and the businesses have to explore the new ways to flourish and promote the loyalty of customers. The current study hypothesize that customer loyalty is significantly affected by the customer satisfaction and trust of the customers. Whereas, perceived value and service quality is important determinants to create the customer satisfaction and trust. The data was collected from different customers of various banks and the hypothesize links are tested. Results indicate that there is a significant relationship between customer satisfaction and trust with customer loyalty. It is also confirmed that service quality and perceived value are important antecedents of customer satisfaction and trust. The results present a comprehensive model in the financial sector to create and manage customer loyalty.

Minimizing Brain Shift in Stereotactic Functional Neurosurgery

2010 ◽  
Vol 67 (3) ◽  
pp. ons213-ons221 ◽  
Author(s):  
Erika A. Petersen ◽  
Etienne M. Holl ◽  
Irene Martinez-Torres ◽  
Thomas Foltynie ◽  
Patricia Limousin ◽  
...  
Keyword(s):  
Rating Scale ◽  
Electrode Placement ◽  
Brain Shift ◽  
Functional Neurosurgery ◽  
Image Guided ◽  
Subcortical Brain ◽  
Significant Difference ◽  
Mri Scans ◽  
Magnetic Resonance Imaging Mri ◽  
Stn Dbs

Abstract BACKGROUND: Stereotactic functional neurosurgical interventions depend on precise anatomic targeting before lesioning or deep brain stimulation (DBS) electrode placement. OBJECTIVE: To examine the degree of subcortical brain shift observed when adopting an image-guided approach to stereotactic functional neurosurgery. METHODS: Coordinates for the anterior and posterior commissural points (AC and PC) were recorded on thin-slice stereotactic magnetic resonance imaging (MRI) scans performed before and immediately after DBS electrode implantation in 136 procedures. The changes in length of AC-PC and in stereotactic coordinates for AC and PC were calculated for each intervention. In patients with Parkinson disease undergoing bilateral subthalamic nucleus (STN) DBS with at least 6 months of follow-up, pre- and postoperative scores of the motor part of the Unified Parkinson's Disease Rating Scale (UPDRS-III) were reviewed. RESULTS: Mean (SD) change in AC-PC length (ΔAC-PC) was 0.6 (0.4) mm. There was no statistically significant difference in ΔAC-PC between groups when examining anatomic target subgroups (P =.95), age subgroups (P = .63), sex (P = .59), and unilateral versus bilateral implantation (P =.15). The mean (SD) vector changes for the commissural points were: -0.1 (0.3) mm in X, -0.4 (0.6) mm in Y, and -0.1 (0.7) mm in Z for the AC; and -0.1 (0.3) mm in X, -0.2 (0.7) mm in Y, and 0.0 (0.7) mm in Z for the PC. There was a negligible correlation between the magnitude of brain shift and percentage improvement in UPDRS-III off-medication in patients undergoing STN DBS for PD (R2 <0.01). CONCLUSION: Brain shift has long been considered an issue in stereotactic targeting during DBS procedures. However, with the image-guided approach and surgical technique used in this study, subcortical brain shift was extremely limited and did not appear to adversely affect clinical outcome.

Brain Shift Estimation in Image-Guided Neurosurgery Using 3-D Ultrasound

2005 ◽  
Vol 52 (2) ◽  
pp. 268-276 ◽  
Author(s):  
M.M.J. Letteboer ◽  
P.W.A. Willems ◽  
M.A. Viergever ◽  
W.J. Niessen
Keyword(s):  
Brain Shift ◽  
Image Guided

Assessing design process in engineering consultancy firms using lean principles

SIMULATION ◽  
2012 ◽  
Vol 88 (12) ◽  
pp. 1522-1536 ◽  
Author(s):  
M Marzouk ◽  
I Bakry ◽  
M El-Said
Keyword(s):  
Design Process ◽  
Comprehensive Model ◽  
Output Analysis ◽  
Lean Principles ◽  
Proposed Model ◽  
Client Request ◽  
Using Data ◽  
Consultancy Firm ◽  
The Impact

The aim of this research is to provide a tool for assessing the impact of applying lean principles to the design process at construction consultancy firms. Through several interviews, a comprehensive model was built to simulate the design process, using data from a leading consultancy firm in Egypt. The model contains the main processes and activities that form different phases of the design process and depicts the interconnectivity of processes and activities needed to create a complete design package upon client request. The research describes how the five main lean principles are integrated in the model. A case study is considered to demonstrate the effect of using the proposed model on the design process and to illustrate how the design process performs differently when lean principles are introduced. Case study output analysis reveals 40% improvement in the lean process performance measured in terms of activity utilization rates.

Design effectiveness of wind tunnel studies for buildings of intermediate height

1977 ◽  
Vol 4 (1) ◽  
pp. 96-116 ◽  
Author(s):  
David Surry ◽  
Robert B. Kitchen ◽  
Alan G. Davenport
Keyword(s):  
Wind Tunnel ◽  
Building Codes ◽  
Comprehensive Model ◽  
Wind Action ◽  
Model Study ◽  
Design Effectiveness ◽  
Wind Tunnel Study

The components of a comprehensive model study involving both meteorological and wind tunnel investigations are discussed. An application of the procedures is illustrated by a case study involving a building of intermediate height and unusual geometry. The effectiveness of the wind tunnel study is presented in terms of comparisons of the resulting predicted loads with those derived from building codes, and in terms of the improved knowledge of wind action available to the designer.

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