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https://www.readbyqxmd.com/read/29671958/synoptic-reporting-of-pituitary-magnetic-resonance-imaging
#1
Rana S Dhillon, James A King, Tony Goldschlager, Yi Yuen Wang
BACKGROUND: Pituitary adenomas are common, often asymptomatic tumours that are diagnosed incidentally by magnetic resonance imaging (MRI) of the brain. There is considerable variation in the reporting of pituitary MRI, in part because there is no consensus as to what information should be included in such reports. Synoptic reporting consists of using structured checklists to standardize communication. It has been adopted in the surgical pathology literature and more recently in the breast imaging field...
April 19, 2018: ANZ Journal of Surgery
https://www.readbyqxmd.com/read/29666953/multi-institutional-analysis-of-ct-and-mri-reports-evaluating-indeterminate-renal-masses-comparison-to-a-national-survey-investigating-desired-report-elements
#2
Eric M Hu, Andrew Zhang, Stuart G Silverman, Ivan M Pedrosa, Zhen J Wang, Andrew D Smith, Hersh Chandarana, Ankur Doshi, Atul B Shinagare, Erick M Remer, Samuel D Kaffenberger, David C Miller, Matthew S Davenport
PURPOSE: To determine the need for a standardized renal mass reporting template by analyzing reports of indeterminate renal masses and comparing their contents to stated preferences of radiologists and urologists. METHODS: The host IRB waived regulatory oversight for this multi-institutional HIPAA-compliant quality improvement effort. CT and MRI reports created to characterize an indeterminate renal mass were analyzed from 6 community (median: 17 reports/site) and 6 academic (median: 23 reports/site) United States practices...
April 17, 2018: Abdominal Radiology
https://www.readbyqxmd.com/read/29664465/a-high-resolution-probabilistic-in-vivo-atlas-of-human-subcortical-brain-nuclei
#3
Wolfgang M Pauli, Amanda N Nili, J Michael Tyszka
Recent advances in magnetic resonance imaging methods, including data acquisition, pre-processing and analysis, have benefited research on the contributions of subcortical brain nuclei to human cognition and behavior. At the same time, these developments have led to an increasing need for a high-resolution probabilistic in vivo anatomical atlas of subcortical nuclei. In order to address this need, we constructed high spatial resolution, three-dimensional templates, using high-accuracy diffeomorphic registration of T1 - and T2 - weighted structural images from 168 typical adults between 22 and 35 years old...
April 17, 2018: Scientific Data
https://www.readbyqxmd.com/read/29664243/new-technologies-and-techniques-for-prostate-cancer-focal-therapy-a-review-of-the-current-literature
#4
Estefanía Linares-Espinós, Arie Carneiro, Juan I Martínez-Salamanca, Fernando Bianco, Adalberto Castro-Alfaro, Xavier Cathelineau, Massimo Valerio, Rafael Sanchez-Salas
BACKGROUND: The aim of this study was to review the oncological and functional outcomes of new and established primary focal treatments (FT) for localized prostate cancer (PCa). METHODS: We performed a systematic search of published studies on FT for localized PCa using electronic databases (Medline and Embase). These studies included reports on hemiablation, focal ablation and target-ablation. We excluded salvage focal therapy studies and limited the search to those with a minimum of 12 months of follow-up...
April 16, 2018: Minerva Urologica e Nefrologica, the Italian Journal of Urology and Nephrology
https://www.readbyqxmd.com/read/29649085/tract-specific-volume-loss-on-3t-mri-in-patients-with-cervical-spondylotic-myelopathy
#5
Benjamin S Hopkins, Kenneth A Weber, Michael Brendan Cloney, Monica Paliwal, Todd B Parrish, Zachary A Smith
STUDY DESIGN: Case-control. OBJECTIVE: The aim of this study was to understand the role of high-resolution magnetic resonance (MR) in identifying regional cord volume loss in cervical spondylotic myelopathy (CSM). SUMMARY OF BACKGROUND DATA: Preliminary studies suggest that compression of the ventral region of the cord may contribute disproportionately to CSM symptomology; however, tract-specific data are lacking in the CSM population. The current study is the first to use 3T MR imaging (MRI) images of CSM patients to determine specific volume loss at the level of detail of individual descending white matter tracts...
April 11, 2018: Spine
https://www.readbyqxmd.com/read/29609039/computer-aided-diagnosis-of-cavernous-malformations-in-brain-mr-images
#6
Huiquan Wang, S Nizam Ahmed, Mrinal Mandal
Cavernous malformation or cavernoma is one of the most common epileptogenic lesions. It is a type of brain vessel abnormality that can cause serious symptoms such as seizures, intracerebral hemorrhage, and various neurological disorders. Manual detection of cavernomas by physicians in a large set of brain MRI slices is a time-consuming and labor-intensive task and often delays diagnosis. In this paper, we propose a computer-aided diagnosis (CAD) system for cavernomas based on T2-weighted axial plane MRI image analysis...
June 2018: Computerized Medical Imaging and Graphics: the Official Journal of the Computerized Medical Imaging Society
https://www.readbyqxmd.com/read/29595039/an-update-on-prostate-biopsy-in-the-era-of-magnetic-resonance-imaging
#7
Antonio Cicione, Cosimo DE Nunzio, Stefano Manno, Rocco Damiano, Alessandro Posti, Estevao Lima, Andrea Tubaro, Filippo Balloni
INTRODUCTION: Prostate cancer (PCa) is a singular disease owing to absence of imaging technique able to detect suspicious glandular area at higher risk of disease. Nowadays, Magnetic Resonance Imaging (MRI) has been used as a way to detect PCa and simplify targeting prostate biopsy (PB). The aim of this study is to review the most recent data regarding prostate biopsy and MRI guided PB. EVIDENCE ACQUISITION: A comprehensive systematic MEDLINE search was performed in December 2017 for English language reports by using the following terms: prostate biopsy, multiparametric magnetic resonance imaging, prostate cancer, transrectal and transperineal ultrasound, target biopsy...
March 28, 2018: Minerva Urologica e Nefrologica, the Italian Journal of Urology and Nephrology
https://www.readbyqxmd.com/read/29578680/metal-ion-tannic-acid-assembly-as-a-versatile-photothermal-platform-in-engineering-multimodal-nanotheranostics-for-advanced-applications
#8
Tao Liu, Mingkang Zhang, Wenlong Liu, Xuan Zeng, Xianlin Song, Xiaoquan Yang, Xianzheng Zhang, Jun Feng
This study reports a family of photothermal materials, metal ion/tannic acid assemblies (MITAs). MITAs from FeIII , VIII , and RuIII afford excellent photothermal efficiency (η ≈ 40%). Sharply differing from the currently existing photothermal agents, MITAs are highlighted by merits including green synthesis, facile incorporation of diagnostic metal ions, and particularly topology-independent adhesion. Owing to the adhesion nature of MITAs, various kinds of MITA-based nanoengineerings are readily available via the self-adhesion of MITAs onto diverse templates, enabling MITAs well suited as a photothermal platform for versatile combination with other therapy approaches and imaging techniques...
March 28, 2018: ACS Nano
https://www.readbyqxmd.com/read/29570887/estimating-b-1-in-the-breast-at-7-t-using-a-generic-template
#9
Michael J van Rijssel, Josien P W Pluim, Peter R Luijten, Kenneth G A Gilhuijs, Alexander W J Raaijmakers, Dennis W J Klomp
Dynamic contrast-enhanced MRI is the workhorse of breast MRI, where the diagnosis of lesions is largely based on the enhancement curve shape. However, this curve shape is biased by RF transmit (B1 + ) field inhomogeneities. B1 + field information is required in order to correct these. The use of a generic, coil-specific B1 + template is proposed and tested. Finite-difference time-domain simulations for B1 + were performed for healthy female volunteers with a wide range of breast anatomies. A generic B1 + template was constructed by averaging simulations based on four volunteers...
March 23, 2018: NMR in Biomedicine
https://www.readbyqxmd.com/read/29569431/polydopamine-derivated-hierarchical-nanoplatform-for-efficient-dual-modal-imaging-guided-combination-in-vivo-cancer-therapy
#10
Lijiao Ao, Chunlei Wu, Ke Liu, Wei Wang, Lijing Fang, Liang Huang, Wu Su
Exploring multifunctional nanomaterials from biocompatible constituents, with integrated imaging and targeted combination therapeutic modalities of tumors in vivo, provides great prospects for clinical cancer theranostic applications. Here we report a combination strategy for functionalization of polydopamine (PDA) nanohosts with magnetic response and stimuli-controlled drug release capabilities for in vivo cancer theranostic. The high processibility of PDA as nano-templates and surface coating layers as well as its natural affinity to metals, facilitated the sandwich of a compact iron oxide nanoparticles (IOs) layer into the PDA matrix, realizing enhanced near infrared (NIR) photothermal conversion and strong superparamagnetic responsiveness...
March 23, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29548850/a-comparison-of-publicly-available-linear-mri-stereotaxic-registration-techniques
#11
Mahsa Dadar, Vladimir S Fonov, D Louis Collins
INTRODUCTION: Linear registration to a standard space is one of the major steps in processing and analyzing magnetic resonance images (MRIs) of the brain. Here we present an overview of linear stereotaxic MRI registration and compare the performance of 5 publicly available and extensively used linear registration techniques in medical image analysis. METHODS: A set of 9693 T1-weighted MR images were obtained for testing from 4 datasets: ADNI, PREVENT-AD, PPMI, and HCP, two of which have multi-center and multi-scanner data and three of which have longitudinal data...
March 13, 2018: NeuroImage
https://www.readbyqxmd.com/read/29545039/assessment-of-discomfort-and-pain-in-patients-undergoing-fusion-mri-guided-versus-trus-guided-prostate-biopsy
#12
Dennis Robins, Michael Lipsky, Arindam RoyChoudry, Sven Wenske
OBJECTIVE: To investigate patient pain perception from receiving MRI fusion guided prostate biopsy (FBx) in addition to transrectal ultrasound guided template biopsy (TBx) versus pain from standard TBx alone. MATERIALS AND METHODS: Patients undergoing FBx+TBx or TBx alone from April 2016 through February 2017 completed a validated pain survey after biopsy. Responses were graded from 0-10 (0: no pain/willing to return for repeat procedure; 10: excruciating pain/not willing to return for repeat procedure if necessary)...
March 12, 2018: Urology
https://www.readbyqxmd.com/read/29543874/effects-of-99mtc-trodat-1-drug-template-on-image-quantitative-analysis
#13
Cheng-Han Wu, Bang-Hung Yang, Yuan-Hwa Chou, Shyh-Jen Wang, Jyh-Cheng Chen
99mTc-TRODAT-1 is a type of drug that can bind to dopamine transporters in living organisms and is often used in SPCT imaging for observation of changes in the activity uptake of dopamine in the striatum. Therefore, it is currently widely used in studies on clinical diagnosis of Parkinson's disease (PD) and movement-related disorders. In conventional 99mTc-TRODAT-1 SPECT image evaluation, visual inspection or manual selection of ROI for semiquantitative analysis is mainly used to observe and evaluate the degree of striatal defects...
2018: PloS One
https://www.readbyqxmd.com/read/29541618/trabecular-bone-microstructure-is-impaired-in-the-proximal-femur-of-human-immunodeficiency-virus-infected-men-with-normal-bone-mineral-density
#14
Galateia J Kazakia, Julio Carballido-Gamio, Andrew Lai, Lorenzo Nardo, Luca Facchetti, Courtney Pasco, Chiyuan A Zhang, Misung Han, Amanda Hutton Parrott, Phyllis Tien, Roland Krug
Background: There is evidence that human immunodeficiency virus (HIV) infection and antiretroviral therapy (ART) are independent risk factors for osteoporosis and fracture which is not solely explained by changes in bone mineral density. Thus, we hypothesized that the assessment of trabecular microstructure might play an important role for bone quality in this population and might explain the increased fracture risk. In this study, we have assessed bone microstructure in the proximal femur using high-resolution magnetic resonance imaging (MRI) as well as in the extremities using high resolution peripheral quantitative computed tomography (HR-pQCT) in HIV-infected men and healthy controls and compared these findings to those based on areal bone mineral density (aBMD) derived from dual X-ray absorptiometry (DXA) which is the standard clinical parameter for the diagnosis of osteoporosis...
February 2018: Quantitative Imaging in Medicine and Surgery
https://www.readbyqxmd.com/read/29540762/a-novel-hierarchical-template-matching-model-for-cardiac-motion-estimation
#15
Jayendra M Bhalodiya, Arnab Palit, Manoj K Tiwari, Sanjay K Prasad, Sunil K Bhudia, Theodoros N Arvanitis, Mark A Williams
Cardiovascular disease diagnosis and prognosis can be improved by measuring patient-specific in-vivo local myocardial strain using Magnetic Resonance Imaging. Local myocardial strain can be determined by tracking the movement of sample muscles points during cardiac cycle using cardiac motion estimation model. The tracking accuracy of the benchmark Free Form Deformation (FFD) model is greatly affected due to its dependency on tunable parameters and regularisation function. Therefore, Hierarchical Template Matching (HTM) model, which is independent of tunable parameters, regularisation function, and image-specific features, is proposed in this article...
March 14, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29536240/glioma-imaging-in-europe-a-survey-of-220-centres-and-recommendations-for-best-clinical-practice
#16
S C Thust, S Heiland, A Falini, H R Jäger, A D Waldman, P C Sundgren, C Godi, V K Katsaros, A Ramos, N Bargallo, M W Vernooij, T Yousry, M Bendszus, M Smits
OBJECTIVES: At a European Society of Neuroradiology (ESNR) Annual Meeting 2015 workshop, commonalities in practice, current controversies and technical hurdles in glioma MRI were discussed. We aimed to formulate guidance on MRI of glioma and determine its feasibility, by seeking information on glioma imaging practices from the European Neuroradiology community. METHODS: Invitations to a structured survey were emailed to ESNR members (n=1,662) and associates (n=6,400), European national radiologists' societies and distributed via social media...
March 13, 2018: European Radiology
https://www.readbyqxmd.com/read/29515348/multivariate-classification-of-major-depressive-disorder-using-the-effective-connectivity-and-functional-connectivity
#17
Xiangfei Geng, Junhai Xu, Baolin Liu, Yonggang Shi
Major depressive disorder (MDD) is a mental disorder characterized by at least 2 weeks of low mood, which is present across most situations. Diagnosis of MDD using rest-state functional magnetic resonance imaging (fMRI) data faces many challenges due to the high dimensionality, small samples, noisy and individual variability. To our best knowledge, no studies aim at classification with effective connectivity and functional connectivity measures between MDD patients and healthy controls. In this study, we performed a data-driving classification analysis using the whole brain connectivity measures which included the functional connectivity from two brain templates and effective connectivity measures created by the default mode network (DMN), dorsal attention network (DAN), frontal-parietal network (FPN), and silence network (SN)...
2018: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/29506919/impact-of-a-structured-reporting-template-on-adherence-to-prostate-imaging-reporting-and-data-system-version-2-and-on-the-diagnostic-performance-of-prostate-mri-for-clinically-significant-prostate-cancer
#18
Hiram Shaish, Whitney Feltus, Jonathan Steinman, Elizabeth Hecht, Sven Wenske, Firas Ahmed
PURPOSE: The aim of this study was to assess the impact of a structured reporting template on adherence to the Prostate Imaging Reporting and Data System (PI-RADS) version 2 lexicon and on the diagnostic performance of prostate MRI to detect clinically significant prostate cancer (CS-PCa). METHODS: An imaging database was searched for consecutive patients who underwent prostate MRI followed by MRI-ultrasound fusion biopsy from October 2015 through October 2017. The initial MRI reporting template used included only subheadings...
March 2, 2018: Journal of the American College of Radiology: JACR
https://www.readbyqxmd.com/read/29497357/inter-subject-registration-of-functional-images-do-we-need-anatomical-images
#19
Elvis Dohmatob, Gael Varoquaux, Bertrand Thirion
In Echo-Planar Imaging (EPI)-based Magnetic Resonance Imaging (MRI), inter-subject registration typically uses the subject's T1-weighted (T1w) anatomical image to learn deformations of the subject's brain onto a template. The estimated deformation fields are then applied to the subject's EPI scans (functional or diffusion-weighted images) to warp the latter to a template space. Historically, such indirect T1w-based registration was motivated by the lack of clear anatomical details in low-resolution EPI images: a direct registration of the EPI scans to template space would be futile...
2018: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/29495896/polygenic-risk-score-for-alzheimer-s-disease-implications-for-memory-performance-and-hippocampal-volumes-in-early-life
#20
Luiza K Axelrud, Marcos L Santoro, Daniel S Pine, Fernanda Talarico, Ary Gadelha, Gisele G Manfro, Pedro M Pan, Andrea Jackowski, Felipe Picon, Elisa Brietzke, Rodrigo Grassi-Oliveira, Rodrigo A Bressan, Eurípedes C Miguel, Luis A Rohde, Hakon Hakonarson, Zdenka Pausova, Sintia Belangero, Tomas Paus, Giovanni A Salum
OBJECTIVE: Alzheimer's disease is a heritable neurodegenerative disorder in which early-life precursors may manifest in cognition and brain structure. The authors evaluate this possibility by examining, in youths, associations among polygenic risk score for Alzheimer's disease, cognitive abilities, and hippocampal volume. METHOD: Participants were children 6-14 years of age in two Brazilian cities, constituting the discovery (N=364) and replication samples (N=352)...
March 2, 2018: American Journal of Psychiatry
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