keyword
MENU ▼
Read by QxMD icon Read
search

mri template

keyword
https://www.readbyqxmd.com/read/27906722/location-and-grade-of-prostate-cancer-diagnosed-by-transperineal-template-guided-mapping-biopsy-after-negative-transrectal-ultrasound-guided-biopsy
#1
Nathan Bittner, Gregory Merrick, Al Taira, Abbey Bennett, Amy Schattel, Wayne Butler, Robert Galbreath, Edward Adamovich
OBJECTIVES: To determine the location and grade of prostate cancer diagnosed by transperineal template-guided mapping (TTMB) after negative transrectal ultrasound-guided (TRUS) biopsy. MATERIALS AND METHODS: This analysis consisted of 1118 consecutive patients who underwent TTMB from January 2005 to August 2015. Eight hundred thirty-five underwent TTMB after at least 1 negative TRUS biopsy and 283 underwent TTMB as the first biopsy procedure. The study population was divided into cohorts based on the number of prior TRUS biopsy sessions (0, 1, 2, and ≥3)...
November 30, 2016: American Journal of Clinical Oncology
https://www.readbyqxmd.com/read/27901096/image-based-in-vivo-assessment-of-targeting-accuracy-of-stereotactic-brain-surgery-in-experimental-rodent-models
#2
Janaki Raman Rangarajan, Greetje Vande Velde, Friso van Gent, Philippe De Vloo, Tom Dresselaers, Maarten Depypere, Kris van Kuyck, Bart Nuttin, Uwe Himmelreich, Frederik Maes
Stereotactic neurosurgery is used in pre-clinical research of neurological and psychiatric disorders in experimental rat and mouse models to engraft a needle or electrode at a pre-defined location in the brain. However, inaccurate targeting may confound the results of such experiments. In contrast to the clinical practice, inaccurate targeting in rodents remains usually unnoticed until assessed by ex vivo end-point histology. We here propose a workflow for in vivo assessment of stereotactic targeting accuracy in small animal studies based on multi-modal post-operative imaging...
November 30, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27900453/incidence-grade-and-distribution-of-prostate-cancer-following-transperineal-template-guided-mapping-biopsy-in-patients-with-atypical-small-acinar-proliferation
#3
Gregory S Merrick, Robert W Galbreath, Abbey Bennett, Wayne M Butler, Edward Amamovich
PURPOSE: To evaluate the role of transperineal template-guided mapping biopsy (TTMB) in patients with atypical small acinar proliferation (ASAP) diagnosed via transrectal ultrasound-guided needle biopsy (TRUS). METHODS: In total, 132 consecutive patients with TRUS-diagnosed ASAP underwent TTMB by means of an anatomic-based technique with sampling of 24 biopsy regions. For each of the 24 regions, 1-3 biopsy cores were obtained (depending on prostate size). No patient underwent pre-biopsy MRI imaging...
November 29, 2016: World Journal of Urology
https://www.readbyqxmd.com/read/27895682/development-and-clinical-implementation-of-a-new-template-for-mri-based-intracavitary-interstitial-gynecologic-brachytherapy-for-locally-advanced-cervical-cancer-from-ct-based-mupit-to-the-mri-compatible-template-benidorm-ten-years-of-experience
#4
Silvia Rodríguez Villalba, Jose Richart Sancho, Antonio Otal Palacín, Jose Perez-Calatayud, Manuel Santos Ortega
PURPOSE: To study outcome and toxicity in 59 patients with locally advanced cervix carcinoma treated with computed tomography (CT)-based Martinez universal perineal interstitial template (MUPIT) and the new magnetic resonance imaging (MRI)-compatible template Benidorm (TB). MATERIAL AND METHODS: From December 2005 to October 2015, we retrospectively analyzed 34 patients treated with MUPIT and 25 treated with the TB. Six 4 Gy fractions were prescribed to the clinical target volume (CTV) combined with external beam radiotherapy (EBRT)...
October 2016: Journal of Contemporary Brachytherapy
https://www.readbyqxmd.com/read/27859637/assessing-clinically-significant-prostate-cancer-diagnostic-properties-of-multiparametric-magnetic-resonance-imaging-compared-to-three-dimensional-transperineal-template-mapping-histopathology
#5
Matvey Tsivian, Rajan T Gupta, Efrat Tsivian, Peter Qi, Melissa H Mendez, Michael R Abern, Kae Jack Tay, Thomas J Polascik
OBJECTIVE: To evaluate the diagnostic properties of multiparametric magnetic resonance imaging in the detection, localization and characterization of prostate cancer using three-dimensional transperineal template mapping biopsy histopathology as the comparator. METHODS: A retrospective analysis of patients undergoing prostate multiparametric magnetic resonance imaging followed by three-dimensional transperineal template mapping biopsy was carried out. For imaging and pathology data, the prostate was divided in octants with the urethra being the midline...
November 8, 2016: International Journal of Urology: Official Journal of the Japanese Urological Association
https://www.readbyqxmd.com/read/27845218/determination-of-the-role-of-negative-magnetic-resonance-imaging-of-the-prostate-in-clinical-practice-is-biopsy-is-still-necessary
#6
Robert S Wang, Eric H Kim, Joel M Vetter, Kathryn J Fowler, Anup S Shetty, Aaron J Mintz, Niraj G Badhiwala, Robert L Grubb, Gerald L Andriole
OBJECTIVES: To assess the negative predictive value (NPV) of multi-parametric MRI (mpMRI) for detection of prostate cancer (PCa) in routine clinical practice, and to identify characteristics of patients for whom mpMRI fails to detect high-grade (Gleason ≥7) disease. METHODS: We reviewed our prospectively maintained database of consecutive men who received prostate mpMRI at our institution, interpreted by a clinical practice of academic radiologists. Between January 2012 and December 2015, 84 men without any MR suspicious regions (MSRs) according to prior institutional classification, or with PI-RADS 1-2 lesions according to the PI-RADS system, underwent standard template transrectal ultrasound-guided (TRUS) prostate biopsy...
November 11, 2016: Urology
https://www.readbyqxmd.com/read/27843735/interhemispheric-difference-images-from-postoperative-diffusion-tensor-imaging-of-gliomas
#7
Robert Kosztyla, Stefan A Reinsberg, Vitali Moiseenko, Brian Toyota, Alan Nichol
Introduction Determining the full extent of gliomas during radiotherapy planning can be challenging with conventional T1 and T2 magnetic resonance imaging (MRI). The purpose of this study was to develop a method to automatically calculate differences in the fractional anisotropy (FA) and mean diffusivity (MD) values in target volumes obtained with diffusion tensor imaging (DTI) by comparing with values from anatomically homologous voxels on the contralateral side of the brain. Methods Seven patients with a histologically confirmed glioma underwent postoperative radiotherapy planning with 1...
October 5, 2016: Curēus
https://www.readbyqxmd.com/read/27818606/modeling-4d-pathological-changes-by-leveraging-normative-models
#8
Bo Wang, Marcel Prastawa, Andrei Irimia, Avishek Saha, Wei Liu, S Y Matthew Goh, Paul M Vespa, John D Van Horn, Guido Gerig
With the increasing use of efficient multimodal 3D imaging, clinicians are able to access longitudinal imaging to stage pathological diseases, to monitor the efficacy of therapeutic interventions, or to assess and quantify rehabilitation efforts. Analysis of such four-dimensional (4D) image data presenting pathologies, including disappearing and newly appearing lesions, represents a significant challenge due to the presence of complex spatio-temporal changes. Image analysis methods for such 4D image data have to include not only a concept for joint segmentation of 3D datasets to account for inherent correlations of subject-specific repeated scans but also a mechanism to account for large deformations and the destruction and formation of lesions (e...
October 2016: Computer Vision and Image Understanding: CVIU
https://www.readbyqxmd.com/read/27814981/hemi-gland-focal-low-dose-rate-prostate-brachytherapy-an-analysis-of-dosimetric-outcomes
#9
Robert Laing, Adrian Franklin, Jennifer Uribe, Alex Horton, Santiago Uribe-Lewis, Stephen Langley
BACKGROUND AND PURPOSE: Advances in magnetic resonance imaging (MRI) and prostate sampling enable early identification of men with low to intermediate risk prostate cancer who are candidates for focal therapies that minimise side effects. We report dosimetry data from a pilot study evaluating the effectiveness of hemi-gland low dose rate (HG-LDR) brachytherapy as a focal therapy approach to control unilateral localised disease. MATERIAL AND METHODS: Twenty-two men underwent HG-LDR brachytherapy...
November 1, 2016: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/27785699/cerebellar-involvement-in-patients-with-mild-to-moderate-myoclonus-due-to-epm1-structural-and-functional-mri-findings-in-comparison-with-healthy-controls-and-ataxic-patients
#10
Anna Nigri, Elisa Visani, Nicola Bertolino, Lorenzo Nanetti, Caterina Mariotti, Marta Panzeri, Maria Grazia Bruzzone, Silvana Franceschetti, Laura Canafoglia
EPM1 (epilepsy, progressive myoclonic 1; Unverricht-Lundborg disease, OMIM #254800) is the most frequent form of progressive myoclonus epilepsy. Previous findings have suggested that its pathophysiology mainly involves the cerebellum, but the evaluation of cerebellar dysfunction is still unsatisfactory. The aim of this study was to assess the structural and functional involvement of the cerebellum in EPM1. We used voxel-based morphometry and spatially unbiased infra-tentorial template analyses of structural magnetic resonance imaging (MRI) scans, and functional MRI (fMRI) scans during block and event-related go/no-go motor tasks to study 13 EPM1 patients with mild to moderate myoclonus...
October 26, 2016: Brain Topography
https://www.readbyqxmd.com/read/27779127/towards-real-time-mri-guided-3d-localization-of-deforming-targets-for-non-invasive-cardiac-radiosurgery
#11
S Ipsen, O Blanck, N J Lowther, G P Liney, R Rai, F Bode, J Dunst, A Schweikard, P J Keall
Radiosurgery to the pulmonary vein antrum in the left atrium (LA) has recently been proposed for non-invasive treatment of atrial fibrillation (AF). Precise real-time target localization during treatment is necessary due to complex respiratory and cardiac motion and high radiation doses. To determine the 3D position of the LA for motion compensation during radiosurgery, a tracking method based on orthogonal real-time MRI planes was developed for AF treatments with an MRI-guided radiotherapy system. Four healthy volunteers underwent cardiac MRI of the LA...
November 21, 2016: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/27774787/template-free-synthesis-of-hollow-porous-organosilica-fe3o4-hybrid-nanocapsules-towards-mri-guided-high-intensity-focused-ultrasound-therapy
#12
Ming Ma, Fei Yan, Minghua Yao, Zijun Wei, Dongliang Zhou, Heliang Yao, Hairong Zheng, Hangrong Chen, Jianlin Shi
Entirely differing from the common templating-based multistep strategy in fabricating multifunctional hollow mesoporous silica nanoparticles (HMSNs), a facile and template-free synthetic strategy has been established in constructing a unique hollow/mesoporous organosilica nanocapsule concurrently encapsulating both isopentyl acetate (PEA) liquid and superparamagnetic iron oxides inside (denoted as PEA@OSNCs). This novel material exhibits ultrasmall and uniform particle size (~82 nm), high surface area (~534 m2 g-1) and excellent colloidal stability in aqueous solution...
October 24, 2016: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/27764537/increasing-the-spatial-resolution-and-sensitivity-of-magnetic-resonance-elastography-by-correcting-for-subject-motion-and-susceptibility-induced-image-distortions
#13
Andreas Fehlner, Sebastian Hirsch, Martin Weygandt, Thomas Christophel, Eric Barnhill, Mykola Kadobianskyi, Jürgen Braun, Johannes Bernarding, Ralf Lützkendorf, Ingolf Sack, Stefan Hetzer
PURPOSE: To improve the resolution of elasticity maps by adapting motion and distortion correction methods for phase-based magnetic resonance imaging (MRI) contrasts such as magnetic resonance elastography (MRE), a technique for measuring mechanical tissue properties in vivo. MATERIALS AND METHODS: MRE data of the brain were acquired with echo-planar imaging (EPI) at 3T (n = 14) and 7T (n = 18). Motion and distortion correction parameters were estimated using the magnitude images...
October 20, 2016: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/27752882/gene-expression-signal-transduction-pathways-and-functional-networks-associated-with-growth-of-sporadic-vestibular-schwannomas
#14
Hjalte C R Sass, Rehannah Borup, Mikkel Alanin, Finn Cilius Nielsen, Per Cayé-Thomasen
The objective of this study was to determine global gene expression in relation to Vestibular schwannomas (VS) growth rate and to identify signal transduction pathways and functional molecular networks associated with growth. Repeated magnetic resonance imaging (MRI) prior to surgery determined tumor growth rate. Following tissue sampling during surgery, mRNA was extracted from 16 sporadic VS. Double stranded cDNA was synthesized from the mRNA and used as template for in vitro transcription reaction to synthesize biotin-labeled antisense cRNA, which was hybridized to Affymetrix HG-U133A arrays and analyzed by dChip software...
October 17, 2016: Journal of Neuro-oncology
https://www.readbyqxmd.com/read/27752038/catechin-tuned-magnetism-of-gd-doped-orthovanadate-through-morphology-as-t1-t2-mri-contrast-agents
#15
Tamilmani Vairapperumal, Ariya Saraswathy, Jayasree S Ramapurath, Sreeram Kalarical Janardhanan, Nair Balachandran Unni
Tetragonal (t)-LaVO4 has turned out to be a potential host for luminescent materials. Synthesis of t-LaVO4 till date has been based on chelating effect of EDTA making it not ideal for bioimaging applications. An alternative was proposed by us through the use of catechin. In recent times there is interest for new MRI contrast agents that can through appropriate doping function both as MRI contrast and optical/upconversion materials. It is generally believed that under appropriate doping, t-LaVO4 would be a better upconversion material than monoclinic (m)-LaVO4...
October 18, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27730480/surface-based-morphometry-reveals-caudate-subnuclear-structural-damage-in-patients-with-premotor-huntington-disease
#16
Hosung Kim, Ji-Hoon Kim, Katherine L Possin, Joseph Winer, Michael D Geschwind, Duan Xu, Christopher P Hess
In patients with premotor Huntington's disease (pmHD), literature has reported decreases in caudate volume. However, the regional vulnerability of the caudate nucleus to pmHD remains to be clarified. We aimed to determine whether regional structural damage of the caudate nucleus was present in pmHD and was correlated with clinical profile using a surface-based morphometric technique applied to T1-weighted MRI. The study cohort consisted of 14 volunteers with genetically confirmed pmHD (6 males; 41.8 ± 13...
October 11, 2016: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/27725314/a-new-neonatal-cortical-and-subcortical-brain-atlas-the-melbourne-children-s-regional-infant-brain-m-crib-atlas
#17
Bonnie Alexander, Andrea L Murray, Wai Yen Loh, Lillian G Matthews, Chris Adamson, Richard Beare, Jian Chen, Claire E Kelly, Sandra Rees, Simon K Warfield, Peter J Anderson, Lex W Doyle, Alicia J Spittle, Jeanie L Y Cheong, Marc L Seal, Deanne K Thompson
Investigating neonatal brain structure and function can offer valuable insights into behaviour and cognition in healthy and clinical populations; both at term age, and longitudinally in comparison with later time points. Parcellated brain atlases for adult populations are readily available, however warping infant data to adult template space is not ideal due to morphological and tissue differences between these groups. Several parcellated neonatal atlases have been developed, although there remains strong demand for manually parcellated ground truth data with detailed cortical definition...
October 8, 2016: NeuroImage
https://www.readbyqxmd.com/read/27723607/mapping-learning-visualization-classification-and-understanding-of-fmri-data-in-the-neucube-evolving-spatiotemporal-data-machine-of-spiking-neural-networks
#18
Nikola K Kasabov, Maryam Gholami Doborjeh, Zohreh Gholami Doborjeh
This paper introduces a new methodology for dynamic learning, visualization, and classification of functional magnetic resonance imaging (fMRI) as spatiotemporal brain data. The method is based on an evolving spatiotemporal data machine of evolving spiking neural networks (SNNs) exemplified by the NeuCube architecture [1]. The method consists of several steps: mapping spatial coordinates of fMRI data into a 3-D SNN cube (SNNc) that represents a brain template; input data transformation into trains of spikes; deep, unsupervised learning in the 3-D SNNc of spatiotemporal patterns from data; supervised learning in an evolving SNN classifier; parameter optimization; and 3-D visualization and model interpretation...
October 6, 2016: IEEE Transactions on Neural Networks and Learning Systems
https://www.readbyqxmd.com/read/27720818/sct-spinal-cord-toolbox-an-open-source-software-for-processing-spinal-cord-mri-data
#19
Benjamin De Leener, Simon Lévy, Sara M Dupont, Vladimir S Fonov, Nikola Stikov, D Louis Collins, Virginie Callot, Julien Cohen-Adad
For the past 25 years, the field of neuroimaging has witnessed the development of several software packages for processing multi-parametric magnetic resonance imaging (mpMRI) to study the brain. These software packages are now routinely used by researchers and clinicians, and have contributed to important breakthroughs for the understanding of brain anatomy and function. However, no software package exists to process mpMRI data of the spinal cord. Despite the numerous clinical needs for such advanced mpMRI protocols (multiple sclerosis, spinal cord injury, cervical spondylotic myelopathy, etc...
October 5, 2016: NeuroImage
https://www.readbyqxmd.com/read/27702610/multi-template-analysis-of-human-perirhinal-cortex-in-brain-mri-explicitly-accounting-for-anatomical-variability
#20
Long Xie, John B Pluta, Sandhitsu R Das, Laura E M Wisse, Hongzhi Wang, Lauren Mancuso, Dasha Kliot, Brian B Avants, Song-Lin Ding, José V Manjón, David A Wolk, Paul A Yushkevich
RATIONAL: The human perirhinal cortex (PRC) plays critical roles in episodic and semantic memory and visual perception. The PRC consists of Brodmann areas 35 and 36 (BA35, BA36). In Alzheimer's disease (AD), BA35 is the first cortical site affected by neurofibrillary tangle pathology, which is closely linked to neural injury in AD. Large anatomical variability, manifested in the form of different cortical folding and branching patterns, makes it difficult to segment the PRC in MRI scans...
October 1, 2016: NeuroImage
keyword
keyword
78551
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"