Essays about: "T1"

Showing result 16 - 20 of 70 essays containing the word T1.

1. 16. Characterization of discrepancies between manual and automatic segmentation to improve anatomical brain atlases

   University essay from

   Author : Anna Sörensson; [2021-05-10]
   Keywords : Medical physics; Anatomical brain atlas; Image segmentation; Image registration;

   Abstract : Purpose: To characterize discrepancies between expert manually segmented brain images from Hammers Atlas Database and automatically generated segmentations of the same images; to decide whether they can be attributed to flaws in the automatic segmentation or in the manual segmentation; and to determine general rules that enable these decisions. Theory: Image segmentation plays an important role in clinical neuroscience and experimental medicine for extraction of information from medical images, and it is a fundamental image processing step in medical image analysis. READ MORE

3. 17. ATLAS DATABASES OF HUMAN BRAIN ANATOMY: QUALITATIVE AND QUANTITATIVE COMPARISON

   University essay from

   Author : Amanda Philipsson Franzén; [2021-01-11]
   Keywords : Medical physics; Brain atlas concordance problem; Quantitative comparison; Qualitative comparison; Hammersmith; 2012 MICCAI Multi-Atlas Labelling Challenge Data;

   Abstract : The purpose of this study was to quantitatively and qualitatively compare the two brain atlases databases, Hammersmith and 2012 MICCAI Multi-Atlas Labelling Challenge data, by developing a quantitative method. Theory Anatomical atlases of the human brain provide reference information about its structure. READ MORE

4. 18. A “Triangle” of Conflict between Duque’s Government of Colombia and the Ejército de Liberación Nacional – 2018-2020

   University essay from Högskolan Väst/Avd för juridik, ekonomi, statistik och politik

   Author : Natalie Mattsson; [2021]
   Keywords : Colombia; Ejército de Liberación; Iván Duque; Internal armed conflict; Discourse analysis;

   Abstract : This thesis is conducted as a descriptive qualitative single case study to establish empirical knowledge of the ongoing internal armed conflict between the government of Colombia and the guerrilla Ejército de Liberación Nacional. The ontological foundation orienting from social constructivism and Galtung’s theoretical concepts of attitude, behaviour, and contradiction along with the three aspects of violence: direct, cultural, and structural. READ MORE

5. 19. Measuring T1 using MP2RAGE in Human Brain at 7T – Effect of B1+ and Inversion Pulse Efficiency

   University essay from Lunds universitet/Sjukhusfysikerutbildningen

   Author : Mustafa Kadhim; [2021]
   Keywords : Medicine and Health Sciences;

   Abstract : Introduction: The MP2RAGE technique has become popular for structural MRI at ultra-high fields. The core idea behind MP2RAGE is to reduce the influence of flip angle inhomogeneity (B +), proton density and T2* by calculating the regularized signed ratio of two complex MP-RAGE images acquired at different inversion times (TI) within the cycle. READ MORE

6. 20. Influence of T1 and T2 weighted MRI images on automated  diagnosis of Alzheimer's disease

   University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

   Author : Arnold Teo; Daniel Tsada Yosief; [2021]
   Keywords : ;

   Abstract : Alzheimer’s Disease (AD) is the most common form of dementia and according to the World Health Organization it contributes to 60-70% of the approximately 50 million total worldwide dementia cases. While AD is easy to diagnose from a patient’s symptoms alone, due to AD atrophying brain tissue, a Magnetic Resonance Imaging (MRI) scan can strengthen the diagnosis. READ MORE