scholarly journals Partial volume model for brain MRI scan using MP2RAGE

2017 ◽  
Vol 38 (10) ◽  
pp. 5115-5127 ◽  
Author(s):  
Quentin Duché ◽  
Hervé Saint‐Jalmes ◽  
Oscar Acosta ◽  
Parnesh Raniga ◽  
Pierrick Bourgeat ◽  
...  
Keyword(s):  
Brain Mri ◽  
Mri Scan ◽  
Partial Volume ◽  
Volume Model

scholarly journals Extricating Brain Tumor in MRI Images with the aid of MATLAB software

2021 ◽  
Vol 9 (VII) ◽  
pp. 502-506
Author(s):  
Shivam Kumar Mittal
Keyword(s):  
Image Processing ◽  
Brain Tumor ◽  
Image Quality ◽  
Brain Mri ◽  
Medical Science ◽  
Noise Removal ◽  
Mri Scan ◽  
Matlab Software ◽  
The Brain ◽  
Mri Image

In the current era of Medical Science, Image Processing is the most evolving and inspiring technique. This technique consolidates some noise removal functions, segmentation, and morphological activities which are the fundamental ideas of image processing. Initially preprocessing of an MRI image is done to ensure the image quality for further processing/output. Our paper portrays the methodology to extricate and diagnose the brain tumor with the help of an affected person’s MRI scan pictures of the brain. MRI pictures are taken into account to recognize and extricate the tumor from the brain with the aid of MATLAB software.

Kitten Scanner reduces the use of sedation in pediatric MRI

2018 ◽  
Vol 23 (2) ◽  
pp. 256-265 ◽  
Author(s):  
Eleonora Cavarocchi ◽  
Ilde Pieroni ◽  
Antonio Serio ◽  
Lucio Velluto ◽  
Biancamaria Guarnieri ◽  
...  
Keyword(s):  
Brain Mri ◽  
Total Sample ◽  
Autism Spectrum ◽  
Motion Artifacts ◽  
Educational Training ◽  
Mri Scan ◽  
Number Of Children ◽  
Before And After ◽  
And Gender ◽  
Training Protocol

The use of sedation before a magnetic resonance imaging (MRI) scan is a common practice to overcome motion artifacts and anxiety in children. However, this technique has its drawbacks. We retrospectively compared the number of children undergoing a brain MRI scan with or without sedation before and after the introduction of an educational training protocol using a toy scanner (the Philips Kitten Scanner) and we investigated the effectiveness of this training in relation to children’s age and gender. We considered 1461 children between 4 years and 14 years. Of them, 158 had a diagnosis of autism spectrum disorder or attention-deficit hyperactivity disorder and were excluded from further analysis. After the introduction of the Kitten Scanner training protocol, the sedation need decreased by 30% in the total sample group and in children younger than 10 years in particular. Before the training, females were more likely to undergo the MRI examination without sedation as compared to males, while after its introduction this gender difference was no more visible.

scholarly journals A printed information leaflet about MRI and radiologists improves neuroradiology patient health literacy

2018 ◽  
Vol 31 (6) ◽  
pp. 609-613
Author(s):  
Daniel Thomas Ginat ◽  
Gregory Christoforidis
Keyword(s):  
Standard Deviation ◽  
Health Literacy ◽  
Brain Mri ◽  
Brain Magnetic Resonance Imaging ◽  
Rank Test ◽  
Average Score ◽  
Mri Scan ◽  
Waiting Room ◽  
Reading Material ◽  
Mri Scans

Purpose To determine the health literacy benefit of a printed informational leaflet for patients scheduled to undergo brain magnetic resonance imaging (MRI) scans. Methods and materials A two-page leaflet that provided an overview of MRI and the role of radiologists was prepared and given to outpatients scheduled to undergo brain MRI examinations while in the waiting room. A survey composed mainly of yes/no and Likert scale questions pertaining to the leaflet, as well as patient demographics, was administered to the patients. Results A total of 147 patients completed the survey, of which 110 (75%) had undergone a prior MRI scan, 120 (82%) stated that their ordering provider explained the reason for the MRI scan, and less than 1% reported having referenced online resources related to MRI. The average score for how well patients understood the MRI scan procedure and how it is reviewed was 4.16/5 (standard deviation 1.18) before versus 4.39/5 (standard deviation 1.08) after reading the leaflet, which was a statistically significant improvement based on the Wilcoxon signed-rank test ( P < 0.01). The score for how helpful the reading material was for explaining what is MRI was 4.06/5 (standard deviation 1.02) and the score for how helpful the reading material was for explaining what is a radiologist was 4.18/5 (standard deviation 0.98). Conclusion A printed leaflet about MRI and radiologists can serve as an opportunity to educate patients about certain aspects of their scans during their stay in the waiting room.

Gender differences in partial-volume corrected brain perfusion using brain MRI in healthy children

NeuroImage ◽  
2011 ◽  
Vol 58 (3) ◽  
pp. 709-715 ◽  
Author(s):  
Yasuyuki Taki ◽  
Hiroshi Hashizume ◽  
Yuko Sassa ◽  
Hikaru Takeuchi ◽  
Kai Wu ◽  
...  
Keyword(s):  
Gender Differences ◽  
Brain Mri ◽  
Brain Perfusion ◽  
Healthy Children ◽  
Partial Volume

scholarly journals Clinical and Radiological Profiles of COVID-19 Patients with Neurological Symptomatology: A Comparative Study

Viruses ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 845
Author(s):  
Maria de Fatima Viana Vasco Aragao ◽  
Mariana de Carvalho Leal ◽  
Pedro Henrique Pereira Andrade ◽  
Ocelio Queiroga Cartaxo Filho ◽  
Lucas Vasco Aragao ◽  
...  
Keyword(s):  
Brain Mri ◽  
Chest Ct ◽  
Neurological Involvement ◽  
Mechanical Ventilator ◽  
Mri Scan ◽  
Olfactory Bulbs ◽  
Brain Ct ◽  
Significant Difference ◽  
Brain Scan ◽  
The Brain

Patients with COVID-19 can require radiological examination, with chest CT being more frequent than neuro-imaging. The objective is to identify epidemiological, clinical and radiological factors considered as predictors of neurological involvement in patients with COVID-19 assessed by neuroimaging and to describe the neuroimaging findings. This retrospective study was performed with 232 consecutive confirmed COVID-19 patients, from two radiological units, which were divided into two groups: (1) those who underwent a brain CT/MRI scan (n = 35) versus (2) those who did not undergo the brain CT/MRI scan, but underwent only chest CT (n = 197). There was a statistically significant difference with associations regarding the COVID-19 brain scan group for: admission to ICU, greater severity of lung injuries, the use of a mechanical ventilator and sepsis. Statistical tendency was found for chronic renal failure and systemic arterial hypertension. Forty-percent of COVID-19 patients from the brain scan group were abnormal on brain CT and/or brain MRI (22.9% of the cases with bleeding or microbleeding, 8.6% with restricted diffusion lesions). One ischemic stroke case was associated with irregularity at the M1 segment of the right middle cerebral artery. There was a case of left facial nerve palsy with enhancement of the left geniculate ganglia. An analysis of the olfactory bulbs was possible in 12 brain MRIs and 100% had enhancement and/or microbleeding. In conclusion, a more severe COVID-19 disease from ICU, a more severe form of lung disease, the use of mechanical ventilator and sepsis were associated to the COVID-19 patients with neurological involvement who had undergone brain scans. Microvascular phenomenon was a frequent finding in the brain and olfactory bulbs evaluated by neuroimaging.

scholarly journals Hybrid 2-[18F] FDG PET/MRI in premanifest Huntington’s disease gene-expansion carriers: The significance of partial volume correction

PLoS ONE ◽  
2021 ◽  
Vol 16 (6) ◽  
pp. e0252683
Author(s):  
Marie N. N. Hellem ◽  
Tua Vinther-Jensen ◽  
Lasse Anderberg ◽  
Esben Budtz-Jørgensen ◽  
Lena E. Hjermind ◽  
...  
Keyword(s):  
Huntington's Disease ◽  
Huntington’S Disease ◽  
Outcome Measures ◽  
Fdg Pet ◽  
Volume Effect ◽  
Partial Volume Effect ◽  
Imaging Biomarkers ◽  
Mri Scan ◽  
Partial Volume ◽  
Gene Expansion

Background Huntington’s disease (HD) is an inherited, progressive neurodegenerative disease that has no cure. Striatal atrophy and hypometabolism has been described in HD as far as 15 years before clinical onset and therefore structural and functional imaging biomarkers are the most applied biomarker modalities which call for these to be exact; however, most studies are not considering the partial volume effect and thereby tend to overestimate metabolic reductions, which may bias imaging outcome measures of interventions. Objective Evaluation of partial volume effects in a cohort of premanifest HD gene-expansion carriers (HDGECs). Methods 21 HDGECs and 17 controls had a hybrid 2-[18F]FDG PET/MRI scan performed. Volume measurements and striatal metabolism, both corrected and uncorrected for partial volume effect were correlated to an estimate of disease burden, the CAG age product scaled (CAPS). Results We found significantly reduced striatal metabolism in HDGECs, but not in striatal volume. There was a negative correlation between the CAPS and striatal metabolism, both corrected and uncorrected for the partial volume effect. The partial volume effect was largest in the smallest structures and increased the difference in metabolism between the HDGEC with high and low CAPS scores. Statistical parametric mapping confirmed the results. Conclusions A hybrid 2-[18F]FDG PET/MRI scan provides simultaneous information on structure and metabolism. Using this approach for the first time on HDGECs, we highlight the importance of partial volume effect correction in order not to underestimate the standardized uptake value and thereby the risk of overestimating the metabolic effect on the striatal structures, which potentially could bias studies determining imaging outcome measures of interventions in HDGECs and probably also symptomatic HD.

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