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Breast mri spectroscopy

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https://www.readbyqxmd.com/read/27686882/determination-of-an-optimally-sensitive-and-specific-chemical-exchange-saturation-transfer-mri-quantification-metric-in-relevant-biological-phantoms
#1
Kevin J Ray, James R Larkin, Yee K Tee, Alexandre A Khrapitchev, Gogulan Karunanithy, Michael Barber, Andrew J Baldwin, Michael A Chappell, Nicola R Sibson
The purpose of this study was to develop realistic phantom models of the intracellular environment of metastatic breast tumour and naïve brain, and using these models determine an analysis metric for quantification of CEST MRI data that is sensitive to only labile proton exchange rate and concentration. The ability of the optimal metric to quantify pH differences in the phantoms was also evaluated. Novel phantom models were produced, by adding perchloric acid extracts of either metastatic mouse breast carcinoma cells or healthy mouse brain to bovine serum albumin...
November 2016: NMR in Biomedicine
https://www.readbyqxmd.com/read/27659543/non-invasive-detection-of-2-hydroxyglutarate-in-idh-mutated-gliomas-using-two-dimensional-localized-correlation-spectroscopy-2d-l-cosy-at-7-tesla
#2
Gaurav Verma, Suyash Mohan, MacLean P Nasrallah, Steven Brem, John Y K Lee, Sanjeev Chawla, Sumei Wang, Rajakumar Nagarajan, M Albert Thomas, Harish Poptani
BACKGROUND: Mutations in the isocitrate dehydrogenase enzyme are present in a majority of lower-grade gliomas and secondary glioblastomas. This mis-sense mutation results in the neomorphic reduction of isocitrate dehydrogenase resulting in an accumulation of the "oncometabolite" 2-hydroxyglutarate (2HG). Detection of 2HG can thus serve as a surrogate biomarker for these mutations, with significant translational implications including improved prognostication. Two dimensional localized correlated spectroscopy (2D L-COSY) at 7T is a highly-sensitive non-invasive technique for assessing brain metabolism...
September 22, 2016: Journal of Translational Medicine
https://www.readbyqxmd.com/read/27637861/high-field-mr-spectroscopy-in-the-multiparametric-mri-evaluation-of-breast-lesions
#3
Carlo Cavedon, Gabriele Meliadò, Linda Rossi, Lucia Camera, Ilaria Baglio, Francesca Caumo, Stefania Montemezzi
INTRODUCTION: The aim of this work was to assess the role of 3T-MR spectroscopy (MRS) in the multi-parametric MRI evaluation of breast lesions, using a pattern-recognition based classification method. METHODS: 291 patients (301 lesions, median 2.3cm(3)) were enrolled in the study (age 18-85y, mean 54.2y). T1-TSE (TR/TE=400/10ms) and T2-STIR imaging (TR/TE=5000/60ms), dynamic-contrast-enhanced MRI (DCE-MRI), apparent diffusion coefficient (ADC) (b=0-800s/mm(2)), and single-voxel MRS (10×10×10mm(3), PRESS, TR/TE=3000ms/135ms) were performed by means of a 3T scanner...
September 13, 2016: Physica Medica: PM
https://www.readbyqxmd.com/read/27600118/-diagnostic-imaging-of-breast-cancer-an-update
#4
M Funke
Advances in imaging of the female breast have substantially influenced the diagnosis and probably also the therapy and prognosis of breast cancer in the past few years. This article gives an overview of the most important imaging modalities in the diagnosis of breast cancer. Digital mammography is considered to be the gold standard for the early detection of breast cancer. Digital breast tomosynthesis can increase the diagnostic accuracy of mammography and is used for the assessment of equivocal or suspicious mammography findings...
October 2016: Der Radiologe
https://www.readbyqxmd.com/read/27459480/metabolomics-of-breast-cancer-using-high-resolution-magic-angle-spinning-magnetic-resonance-spectroscopy-correlations-with-18f-fdg-positron-emission-tomography-computed-tomography-dynamic-contrast-enhanced-and-diffusion-weighted-imaging-mri
#5
Haesung Yoon, Dahye Yoon, Mijin Yun, Ji Soo Choi, Vivian Youngjean Park, Eun-Kyung Kim, Joon Jeong, Ja Seung Koo, Jung Hyun Yoon, Hee Jung Moon, Suhkmann Kim, Min Jung Kim
PURPOSE: Our goal in this study was to find correlations between breast cancer metabolites and conventional quantitative imaging parameters using high-resolution magic angle spinning (HR-MAS) magnetic resonance spectroscopy (MRS) and to find breast cancer subgroups that show high correlations between metabolites and imaging parameters. MATERIALS AND METHODS: Between August 2010 and December 2013, we included 53 female patients (mean age 49.6 years; age range 32-75 years) with a total of 53 breast lesions assessed by the Breast Imaging Reporting and Data System...
2016: PloS One
https://www.readbyqxmd.com/read/27364727/-multiparametric-and-molecular-imaging-of-breast-tumors-with-mri-and-pet-mri
#6
K Pinker, M A Marino, A Dr Meyer-Baese, T H Helbich
CLINICAL/METHODICAL ISSUE: Magnetic resonance imaging (MRI) of the breast is an indispensable tool in breast imaging for many indications. Several functional parameters with MRI and positron emission tomography (PET) have been assessed for imaging of breast tumors and their combined application is defined as multiparametric imaging. Available data suggest that multiparametric imaging using different functional MRI and PET parameters can provide detailed information about the hallmarks of cancer and may provide additional specificity...
July 2016: Der Radiologe
https://www.readbyqxmd.com/read/27330299/advanced-mri-techniques-in-the-evaluation-of-complex-cystic-breast-lesions
#7
Manju Bala Popli, Pranav Gupta, Devraj Arse, Pawan Kumar, Prabhjot Kaur
OBJECTIVE: The purpose of this research work was to evaluate complex cystic breast lesions by advanced MRI techniques and correlating imaging with histologic findings. METHODS AND MATERIALS: In a cross-sectional design from September 2013 to August 2015, 50 patients having sonographically detected complex cystic lesions of the breast were included in the study. Morphological characteristics were assessed. Dynamic contrast-enhanced MRI along with diffusion-weighted imaging and MR spectroscopy were used to further classify lesions into benign and malignant categories...
2016: Breast Cancer: Basic and Clinical Research
https://www.readbyqxmd.com/read/27250022/monitoring-of-tissue-optical-properties-during-thermal-coagulation-of-ex-vivo-tissues
#8
Vivek Krishna Nagarajan, Bing Yu
BACKGROUND AND OBJECTIVE: Real-time monitoring of tissue status during thermal ablation of tumors is critical to ensure complete destruction of tumor mass, while avoiding tissue charring and excessive damage to normal tissues. Currently, magnetic resonance thermometry (MRT), along with magnetic resonance imaging (MRI), is the most commonly used technique for monitoring and assessing thermal ablation process in soft tissues. MRT/MRI is very expensive, bulky, and often subject to motion artifacts...
September 2016: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/27208326/development-of-early-adiposity-in-infants-of-mothers-with-gestational-diabetes-mellitus
#9
Karen M Logan, Robby J Emsley, Suzan Jeffries, Izabela Andrzejewska, Matthew J Hyde, Chris Gale, Karyn Chappell, Sundhiya Mandalia, Shalini Santhakumaran, James R C Parkinson, Luke Mills, Neena Modi
OBJECTIVE: Infants born to mothers with gestational diabetes mellitus (GDM) are at greater risk of later adverse metabolic health. We examined plausible candidate mediators, adipose tissue (AT) quantity and distribution and intrahepatocellular lipid (IHCL) content, comparing infants of mothers with GDM and without GDM (control group) over the first 3 postnatal months. RESEARCH DESIGN AND METHODS: We conducted a prospective longitudinal study using MRI and spectroscopy to quantify whole-body and regional AT volumes, and IHCL content, within 2 weeks and 8-12 weeks after birth...
June 2016: Diabetes Care
https://www.readbyqxmd.com/read/27130059/multiparametric-breast-mri-with-3t-effectivity-of-combination-of-contrast-enhanced-mri-dwi-and-1h-single-voxel-spectroscopy-in-differentiation-of-breast-tumors
#10
Erkin Aribal, Ruslan Asadov, Abdullah Ramazan, Mustafa Ümit Ugurlu, Handan Kaya
OBJECTIVES: To evaluate the diagnostic accuracy of dynamic contrast enhanced breast MRI (DCE-MRI) combined with diffusion weighted imaging (DWI) and 1H single-voxel magnetic resonance spectroscopy (1HMRS) in differentiating malignant from benign breast lesions. METHODS: One hundred twenty-nine patients with 138 lesions were included in the study. Multiparametric MRI of the breast was performed with a 3T unit. A DWI is followed by DCE-MRI and 1HMRS. All lesions were biopsied within one week after MRI...
May 2016: European Journal of Radiology
https://www.readbyqxmd.com/read/26951085/anti-vascular-effects-of-the-cytosolic-phospholipase-a2-inhibitor-avx235-in-a-patient-derived-basal-like-breast-cancer-model
#11
Eugene Kim, Hanna Maja Tunset, Jana Cebulla, Riyas Vettukattil, Heidi Helgesen, Astrid Jullumstrø Feuerherm, Olav Engebråten, Gunhild Mari Mælandsmo, Berit Johansen, Siver Andreas Moestue
BACKGROUND: Group IVA cytosolic phospholipase A2 (cPLA2α) plays an important role in tumorigenesis and angiogenesis. It is overexpressed in basal-like breast cancer (BLBC), which is aggressive and usually triple-negative, making it unresponsive to current targeted therapies. Here, we evaluated the anti-angiogenic effects of a specific cPLA2α inhibitor, AVX235, in a patient-derived triple-negative BLBC model. METHODS: Mice bearing orthotopic xenografts received i...
2016: BMC Cancer
https://www.readbyqxmd.com/read/26929050/apparent-exchange-rate-for-breast-cancer-characterization
#12
Samo Lasič, Stina Oredsson, Savannah C Partridge, Lao H Saal, Daniel Topgaard, Markus Nilsson, Karin Bryskhe
Although diffusion MRI has shown promise for the characterization of breast cancer, it has low specificity to malignant subtypes. Higher specificity might be achieved if the effects of cell morphology and molecular exchange across cell membranes could be disentangled. The quantification of exchange might thus allow the differentiation of different types of breast cancer cells. Based on differences in diffusion rates between the intra- and extracellular compartments, filter exchange spectroscopy/imaging (FEXSY/FEXI) provides non-invasive quantification of the apparent exchange rate (AXR) of water between the two compartments...
May 2016: NMR in Biomedicine
https://www.readbyqxmd.com/read/26613876/clinical-imaging-of-tumor-metabolism-with-%C3%A2-h-magnetic-resonance-spectroscopy
#13
REVIEW
Teodoro Martín Noguerol, Javier Sánchez-González, José Pablo Martínez Barbero, Roberto García-Figueiras, Sandra Baleato-González, Antonio Luna
Magnetic resonance spectroscopy (MRS) is a noninvasive functional technique to evaluate the biochemical behavior of human tissues. This property has been widely used in assessment and therapy monitoring of brain tumors. MRS studies can be implemented outside the brain, with successful and promising results in the evaluation of prostate and breast cancer, although still with limited reproducibility. As a result of technical improvements, malignancies of the musculoskeletal system and abdominopelvic organs can benefit from the molecular information that MRS provides...
February 2016: Magnetic Resonance Imaging Clinics of North America
https://www.readbyqxmd.com/read/26538278/doxorubicin-conjugated-%C3%AE-nayf4-gd-3-tb-3-multifunctional-phosphor-nanorods-a-multi-modal-luminescent-magnetic-probe-for-simultaneous-optical-and-magnetic-resonance-imaging-and-an-excellent-ph-triggered-anti-cancer-drug-delivery-nanovehicle
#14
Preeti Padhye, Aftab Alam, Suvankar Ghorai, Samit Chattopadhyay, Pankaj Poddar
Herein, we report the fabrication of a multifunctional nanoprobe based on highly monodispersed, optically and magnetically active, biocompatible, PEI-functionalized, highly crystalline β-NaYF4:Gd(3+)/Tb(3+) nanorods as an excellent multi-modal optical/magnetic imaging tool and a pH-triggered intracellular drug delivery nanovehicle. The static and dynamic photoluminescence spectroscopy showed the presence of sharp emission peaks, with long lifetimes (∼3.5 milliseconds), suitable for optical imaging. The static magnetic susceptibility measurements at room temperature showed a strong paramagnetic signal (χ∼ 3...
December 14, 2015: Nanoscale
https://www.readbyqxmd.com/read/26511652/fluorine-19-labeling-of-stromal-vascular-fraction-cells-for-clinical-imaging-applications
#15
Laura C Rose, Deepak K Kadayakkara, Guan Wang, Amnon Bar-Shir, Brooke M Helfer, Charles F O'Hanlon, Dara L Kraitchman, Ricardo L Rodriguez, Jeff W M Bulte
UNLABELLED: Stromal vascular fraction (SVF) cells are used clinically for various therapeutic targets. The location and persistence of engrafted SVF cells are important parameters for determining treatment failure versus success. We used the GID SVF-1 platform and a clinical protocol to harvest and label SVF cells with the fluorinated ((19)F) agent CS-1000 as part of a first-in-human phase I trial (clinicaltrials.gov identifier NCT02035085) to track SVF cells with magnetic resonance imaging during treatment of radiation-induced fibrosis in breast cancer patients...
December 2015: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/26135017/multiparametric-mri-with-dynamic-contrast-enhancement-diffusion-weighted-imaging-and-31-phosphorus-spectroscopy-at-7-t-for-characterization-of-breast-cancer
#16
Alexander M Th Schmitz, Wouter B Veldhuis, Marian B E Menke-Pluijmers, Wybe J M van der Kemp, Tijl A van der Velden, Marc C J M Kock, Pieter J Westenend, Dennis W J Klomp, Kenneth G A Gilhuijs
OBJECTIVES: To describe and to correlate tumor characteristics on multiparametric 7 tesla (T) breast magnetic resonance imaging (MRI) with prognostic characteristics from postoperative histopathology in patients with breast cancer. MATERIALS AND METHODS: Institutional review board approval and written informed consent of 15 women (46-70 years) with 17 malignant lesions were obtained. In this prospective study (March 2013 to March 2014), women were preoperatively scanned using dynamic contrast-enhanced MRI, diffusion-weighted imaging, and 31-phosphorus spectroscopy (¹³P-MRS)...
November 2015: Investigative Radiology
https://www.readbyqxmd.com/read/26000795/optimization-of-image-reconstruction-for-magnetic-resonance-imaging-guided-near-infrared-diffuse-optical-spectroscopy-in-breast
#17
Yan Zhao, Michael A Mastanduno, Shudong Jiang, Fadi Ei-Ghussein, Jiang Gui, Brian W Pogue, Keith D Paulsen
An optimized approach to nonlinear iterative reconstruction of magnetic resonance imaging (MRI)-guided near-infrared spectral tomography (NIRST) images was developed using an L-curve-based algorithm for the choice of regularization parameter. This approach was applied to clinical exam data to maximize the reconstructed values differentiating malignant and benign lesions. MRI/NIRST data from 25 patients with abnormal breast readings (BI-RADS category 4-5) were analyzed using this optimal regularization methodology, and the results showed enhanced p values and area under the curve (AUC) for the task of differentiating malignant from benign lesions...
May 2015: Journal of Biomedical Optics
https://www.readbyqxmd.com/read/25913106/utilisation-of-mr-spectroscopy-and-diffusion-weighted-imaging-in-predicting-and-monitoring-of-breast-cancer-response-to-chemotherapy
#18
Kin Men Leong, Peter Lau, Saadallah Ramadan
Neoadjuvant chemotherapy (NACT) is the standard treatment option for breast cancer as more data shows that pathologic complete response (pCR) after NACT correlates with improved prognosis. MRI is accepted as the best imaging modality for evaluating the response to NACT in many studies as compared with clinical examination and other imaging modalities. In vivo magnetic resonance spectroscopy (MRS) and diffusion-weighted imaging (DWI) studies have both emerged as potential tools to provide early response indicators based on the changes in the metabolites and the apparent diffusion coefficient (ADC) respectively...
June 2015: Journal of Medical Imaging and Radiation Oncology
https://www.readbyqxmd.com/read/25762432/clinical-applications-at-ultrahigh-field-7%C3%A2-%C3%A2-t-where-does-it-make-the-difference
#19
REVIEW
Siegfried Trattnig, Wolfgang Bogner, Stephan Gruber, Pavol Szomolanyi, Vladimir Juras, Simon Robinson, Štefan Zbýň, Stefan Haneder
Presently, three major MR vendors provide commercial 7-T units for clinical research under ethical permission, with the number of operating 7-T systems having increased to over 50. This rapid increase indicates the growing interest in ultrahigh-field MRI because of improved clinical results with regard to morphological as well as functional and metabolic capabilities. As the signal-to-noise ratio scales linearly with the field strength (B0 ) of the scanner, the most obvious application at 7 T is to obtain higher spatial resolution in the brain, musculoskeletal system and breast...
September 2016: NMR in Biomedicine
https://www.readbyqxmd.com/read/25642737/synthesis-and-characterization-of-bombesin-superparamagnetic-iron-oxide-nanoparticles-as-a-targeted-contrast-agent-for-imaging-of-breast-cancer-using-mri
#20
Atefeh Jafari, Mojtaba Salouti, Saber Farjami Shayesteh, Zahra Heidari, Ahmad Bitarafan Rajabi, Komail Boustani, Ali Nahardani
The targeted delivery of superparamagnetic iron oxide nanoparticles (SPIONs) as a contrast agent may facilitate their accumulation in cancer cells and enhance the sensitivity of MR imaging. In this study, SPIONs coated with dextran (DSPIONs) were conjugated with bombesin (BBN) to produce a targeting contrast agent for detection of breast cancer using MRI. X-ray diffraction, transmission electron microscopy, and vibrating sample magnetometer analyses indicated the formation of dextran-coated superparamagnetic iron oxide nanoparticles with an average size of 6...
February 20, 2015: Nanotechnology
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