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Multiparametric MRI

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https://www.readbyqxmd.com/read/29044908/tumor-radiomic-heterogeneity-multiparametric-functional-imaging-to-characterize-variability-and-predict-response-following-cervical-cancer-radiation-therapy
#1
Stephen R Bowen, William T C Yuh, Daniel S Hippe, Wei Wu, Savannah C Partridge, Saba Elias, Guang Jia, Zhibin Huang, George A Sandison, Dennis Nelson, Michael V Knopp, Simon S Lo, Paul E Kinahan, Nina A Mayr
BACKGROUND: Robust approaches to quantify tumor heterogeneity are needed to provide early decision support for precise individualized therapy. PURPOSE: To conduct a technical exploration of longitudinal changes in tumor heterogeneity patterns on dynamic contrast-enhanced (DCE) magnetic resonance imaging (MRI), diffusion-weighted imaging (DWI) and FDG positron emission tomography / computed tomography (PET/CT), and their association to radiation therapy (RT) response in cervical cancer...
October 16, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/29038888/simultaneous-whole-body-18-f-psma-1007-pet-mri-with-integrated-high-resolution-multiparametric-imaging-of-the-prostatic-fossa-for-comprehensive-oncological-staging-of-patients-with-prostate-cancer-a-pilot-study
#2
Martin T Freitag, Claudia Kesch, Jens Cardinale, Paul Flechsig, Ralf Floca, Matthias Eiber, David Bonekamp, Jan P Radtke, Clemens Kratochwil, Klaus Kopka, Markus Hohenfellner, Albrecht Stenzinger, Heinz-Peter Schlemmer, Uwe Haberkorn, Frederik Giesel
INTRODUCTION: The aim of the present study was to explore the clinical feasibility and reproducibility of a comprehensive whole-body (18)F-PSMA-1007-PET/MRI protocol for imaging prostate cancer (PC) patients. METHODS: Eight patients with high-risk biopsy-proven PC underwent a whole-body PET/MRI (3 h p.i.) including a multi-parametric prostate MRI after (18)F-PSMA-1007-PET/CT (1 h p.i.) which served as reference. Seven patients presented with non-treated PC, whereas one patient presented with biochemical recurrence...
October 16, 2017: European Journal of Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/29036412/radiomic-subtyping-improves-disease-stratification-beyond-key-molecular-clinical-and-standard-imaging-characteristics-in-patients-with-glioblastoma
#3
Philipp Kickingereder, Ulf Neuberger, David Bonekamp, Paula L Piechotta, Michael Götz, Antje Wick, Martin Sill, Annekathrin Kratz, Russell T Shinohara, David T W Jones, Alexander Radbruch, John Muschelli, Andreas Unterberg, Jürgen Debus, Heinz-Peter Schlemmer, Christel Herold-Mende, Stefan Pfister, Andreas von Deimling, Wolfgang Wick, David Capper, Klaus H Maier-Hein, Martin Bendszus
Background: To analyze the potential of radiomics for disease stratification beyond key molecular, clinical and standard imaging features in patients with glioblastoma. Methods: Quantitative imaging features (n=1043) were extracted from the multiparametric MRI of 181 patients with newly-diagnosed glioblastoma prior to standard-of-care treatment (allocated to a discovery and validation set, 2:1 ratio). A subset of 386/1043 features were identified as reproducible (in an independent MRI-test-retest cohort) and selected for analysis...
September 28, 2017: Neuro-oncology
https://www.readbyqxmd.com/read/29028765/preventing-clinical-progression-and-need-for-treatment-in-patients-on-active-surveillance-for-prostate-cancer
#4
Hanan Goldberg, Zachary Klaassen, Thenappan Chandrasekar, Neil Fleshner
PURPOSE OF REVIEW: Active surveillance is an established treatment option for men with localized, low-risk prostate cancer (CaP). It entails the postponement of immediate therapy with the option of delayed intervention upon disease progression. The rate of clinical progression and need for treatment on active surveillance is approximately 50% over 15 years. The present review summarizes recent data on current methods, attempting to prevent clinical progression. RECENT FINDINGS: Patient selection for active surveillance is the first mandatory step required to lower progression...
October 11, 2017: Current Opinion in Urology
https://www.readbyqxmd.com/read/29025721/predictive-models-in-differentiating-vertebral-lesions-using-multiparametric-mri
#5
R Rathore, A Parihar, D K Dwivedi, A K Dwivedi, N Kohli, R K Garg, A Chandra
BACKGROUND AND PURPOSE: Conventional MR imaging has high sensitivity but limited specificity in differentiating various vertebral lesions. We aimed to assess the ability of multiparametric MR imaging in differentiating spinal vertebral lesions and to develop statistical models for predicting the probability of malignant vertebral lesions. MATERIALS AND METHODS: One hundred twenty-six consecutive patients underwent multiparametric MRI (conventional MR imaging, diffusion-weighted MR imaging, and in-phase/opposed-phase imaging) for vertebral lesions...
October 12, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/29023572/computer-aided-detection-in-prostate-cancer-diagnostics-a-promising-alternative-to-biopsy-a-retrospective-study-from-104-lesions-with-histological-ground-truth
#6
Anika Thon, Ulf Teichgräber, Cornelia Tennstedt-Schenk, Stathis Hadjidemetriou, Sven Winzler, Ansgar Malich, Ismini Papageorgiou
BACKGROUND: Prostate cancer (PCa) diagnosis by means of multiparametric magnetic resonance imaging (mpMRI) is a current challenge for the development of computer-aided detection (CAD) tools. An innovative CAD-software (Watson Elementary™) was proposed to achieve high sensitivity and specificity, as well as to allege a correlate to Gleason grade. AIM/OBJECTIVE: To assess the performance of Watson Elementary™ in automated PCa diagnosis in our hospital´s database of MRI-guided prostate biopsies...
2017: PloS One
https://www.readbyqxmd.com/read/29021778/the-combined-quantification-and-interpretation-of-multiple-quantitative-magnetic-resonance-imaging-metrics-enlightens-longitudinal-changes-compatible-with-brain-repair-in-relapsing-remitting-multiple-sclerosis-patients
#7
Guillaume Bonnier, Benedicte Maréchal, Mário João Fartaria, Pavel Falkowskiy, José P Marques, Samanta Simioni, Myriam Schluep, Renaud Du Pasquier, Jean-Philippe Thiran, Gunnar Krueger, Cristina Granziera
OBJECTIVE: Quantitative and semi-quantitative MRI (qMRI) metrics provide complementary specificity and differential sensitivity to pathological brain changes compatible with brain inflammation, degeneration, and repair. Moreover, advanced magnetic resonance imaging (MRI) metrics with overlapping elements amplify the true tissue-related information and limit measurement noise. In this work, we combined multiple advanced MRI parameters to assess focal and diffuse brain changes over 2 years in a group of early-stage relapsing-remitting MS patients...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28990929/multiparametric-magnetic-resonance-imaging-for-active-surveillance-of-prostate-cancer
#8
Julie Y An, Abhinav Sidana, Peter L Choyke, Bradford Wood, Peter A Pinto, İsmail Barış Türkbey
Active surveillance has gained popularity as an acceptable management option for men with low-risk prostate cancer. Successful utilization of this strategy can delay or prevent unnecessary interventions - thereby reducing morbidity associated with overtreatment. The usefulness of active surveillance primarily depends on correct identification of patients with low-risk disease. However, current population-wide algorithms and tools do not adequately exclude high-risk disease, thereby limiting the confidence of clinicians and patients to go on active surveillance...
September 29, 2017: Balkan Medical Journal
https://www.readbyqxmd.com/read/28990727/magnetic-resonance-imaging-of-the-prostate-and-targeted-biopsy-comparison-of-pirads-and-gleason-grading
#9
Matthew Bastian-Jordan
INTRODUCTION: Multiparametric magnetic resonance imaging (mpMRI) of the prostate has become integral in the investigation of suspected prostate cancer. Regions of interest are graded using the PIRADS scoring system, and in our institution, lesions graded as PIRADS 3-5 undergo sampling by MRI-guided biopsy. Limited data currently exists on PIRADS grading and biopsy results. METHODS: Retrospective review of 343 MRI-guided biopsies (MRGB) performed between April 2013 and December 2016 was conducted...
October 9, 2017: Journal of Medical Imaging and Radiation Oncology
https://www.readbyqxmd.com/read/28988274/ultrasound-or-mr-elastography%C3%A2-of-liver-which-one-shall-i-use
#10
Meng Yin, Sudhakar K Venkatesh
Liver stiffness is now a well-established noninvasive biomarker for assessing fibrosis in chronic liver disease. MRI-based and ultrasound-based dynamic elastography techniques have been introduced for assessment of liver stiffness and useful in clinical staging of hepatic fibrosis. Several different elastography techniques are now available with each method having inherent strengths and limitations. The published literature generally indicates that MR elastography has a higher diagnostic performance and fewer technical failures than ultrasound-based elastography techniques in assessing hepatic fibrosis...
October 7, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28987698/diagnostic-performance-of-mri-for-prediction-of-muscle-invasiveness-of-bladder-cancer-a-systematic-review-and-meta-analysis
#11
Sungmin Woo, Chong Hyun Suh, Sang Youn Kim, Jeong Yeon Cho, Seung Hyup Kim
PURPOSE: To review the diagnostic performance of ≥1.5-T MRI for local staging of bladder cancer. METHODS: MEDLINE and EMBASE were searched up to February 21, 2017. We included diagnostic accuracy studies published since 2000 that used ≥1.5-T MRI for local staging (≥T2 [muscle-invasive]) in patients with bladder cancer, using pathology as the reference standard. The methodological quality was assessed using Quality Assessment of Diagnostic Accuracy Studies-2...
October 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28987685/sub-differentiating-equivocal-pi-rads-3-lesions-in-multiparametric-magnetic-resonance-imaging-of-the-prostate-to-improve-cancer-detection
#12
N L Hansen, B C Koo, A Y Warren, C Kastner, T Barrett
PURPOSE: To evaluate sub-differentiation of PI-RADS-3 prostate lesions using pre-defined T2- and diffusion-weighted (DWI) MRI criteria, to aid the biopsy decision process. METHODS: 143 patients with PIRADS-3 index lesions on MRI underwent targeted transperineal-MR/US fusion biopsy. Radiologists with 2 and 7-years experience performed blinded retrospective second-reads using set criteria and assigned biopsy recommendations. Inter-reader agreement, Gleason score (GS), positive (PPV) predictive values (±95% confidence intervals) were calculated and compared by Fisher's exact test with Bonferroni-Hom correction...
October 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28986636/optimising-preoperative-risk-stratification-tools-for-prostate-cancer-using-mpmri
#13
Lars A R Reisæter, Jurgen J Fütterer, Are Losnegård, Yngve Nygård, Jan Monssen, Karsten Gravdal, Ole J Halvorsen, Lars A Akslen, Martin Biermann, Svein Haukaas, Jarle Rørvik, Christian Beisland
PURPOSE: To improve preoperative risk stratification for prostate cancer (PCa) by incorporating multiparametric MRI (mpMRI) features into risk stratification tools for PCa, CAPRA and D'Amico. METHODS: 807 consecutive patients operated on by robot-assisted radical prostatectomy at our institution during the period 2010-2015 were followed to identify biochemical recurrence (BCR). 591 patients were eligible for final analysis. We employed stepwise backward likelihood methodology and penalised Cox cross-validation to identify the most significant predictors of BCR including mpMRI features...
October 6, 2017: European Radiology
https://www.readbyqxmd.com/read/28986612/-imaging-of-locally-advanced-prostate-cancer-importance-of-ultrasound-and-especially-mri
#14
REVIEW
O Solyanik, B Schlenker, C Gratzke, B Ertl-Wagner, D A Clevert, C Stief, J Ricke, D Nörenberg
Prostate cancer is the most common male malignant tumor in Germany, which thus places growing demands on differentiated imaging and risk-adapted therapeutic approaches. Multiparametric MRI (mpMRI) of the prostate enables reliable detection of clinically significant cancers and is currently the leading imaging modality for the detection, characterization, and local staging of prostate cancer. According to the German S3 guideline, mpMRI of the prostate is currently primarily recommended in patients with previous negative TRUS biopsies and persisting tumor suspicion...
October 6, 2017: Der Urologe. Ausg. A
https://www.readbyqxmd.com/read/28986510/combined-18-f-fluciclovine-pet-mri-shows-potential-for-detection-and-characterization-of-high-risk-prostate-cancer
#15
Mattijs Elschot, Kirsten M Selnæs, Elise Sandsmark, Brage Krüger-Stokke, Øystein Størkersen, Guro F Giskeødegård, May-Britt Tessem, Siver A Moestue, Helena Bertilsson, Tone F Bathen
The objective of this study is to investigate if quantitative imaging features derived from combined (18)F-Fluciclovine Positron Emission Tomograpy (PET) / multiparametric Magnetic Resonance Imaging (MRI) show potential for detection and characterization of primary prostate cancer. Methods: Twenty-eight (28) patients diagnosed with high-risk prostate cancer underwent simultaneous (18)F-Fluciclovine PET/MRI before radical prostatectomy. Volumes-of-interest (VOIs) of prostate tumors, benign prostatic hyperplasia (BPH) nodules, prostatitis, and healthy tissue were delineated on T2-weighted images using histology as a reference...
October 6, 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/28977973/multiparametric-imaging-using-18-f-fdg-pet-ct-heterogeneity-parameters-and-functional-mri-techniques-prognostic-significance-in-patients-with-primary-advanced-oropharyngeal-or-hypopharyngeal-squamous-cell-carcinoma-treated-with-chemoradiotherapy
#16
Sheng-Chieh Chan, Nai-Ming Cheng, Chia-Hsun Hsieh, Shu-Hang Ng, Chien-Yu Lin, Tzu-Chen Yen, Cheng-Lung Hsu, Hung-Ming Wan, Chun-Ta Liao, Kai-Ping Chang, Jiun-Jie Wang
BACKGROUND: In this study, PET heterogeneity was combined with functional MRI techniques to refine the prediction of prognosis in patients with oropharyngeal or hypopharyngeal squamous cell carcinoma (OHSCC). METHODS: A total of 124 patients with primary advanced OHSCC who underwent pretreatment (18)F-FDG PET/CT, dynamic contrast-enhanced MR imaging (DCE-MRI), and diffusion-weighted MR imaging (DWI) were enrolled. Conventional and heterogeneity parameters from (18)F-FDG PET as well as perfusion parameters from DCE-MRI and diffusion parameter from DWI of primary tumors were analyzed in relation to recurrence-free survival (RFS) and overall survival (OS)...
September 22, 2017: Oncotarget
https://www.readbyqxmd.com/read/28970203/activation-pattern-of-ace2-ang-1-7-and-ace-ang-ii-pathway-in-course-of-heart-failure-assessed-by-multiparametric-mri-in-vivo-in-tg%C3%AE-q-44-mice
#17
Urszula Tyrankiewicz, Mariola Olkowicz, Tomasz Skorka, Magdalena Jablonska, Anna Orzyłowska, Anna Bar, MichaL Gonet, Piotr Berkowicz, Krzysztof Jasinski, Jerzy A Zoladz, Ryszard T Smolenski, Stefan Chlopicki
Here we analyzed systemic (plasma) and local (heart/aorta) changes in ACE/ACE-2 balance in Tgαq*44 mice in course of heart failure (HF). Tgαq*44 mice with cardiomyocyte specific Gαq overexpression and late onset of HF were analyzed at different age for angiotensin pattern in plasma, heart and aorta using liquid chromatography/mass spectrometry, for progression of HF by in vivo magnetic resonance imaging under isoflurane anesthesia and for exercise capacity by voluntary wheel running. Six-month-old Tgαq*44 mice displayed decreased ventricle radial strains and impaired left atrial function...
September 28, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28963049/histogram-analysis-parameters-identify-multiple-associations-between-dwi-and-dce-mri-in-head-and-neck-squamous-cell-carcinoma
#18
Hans Jonas Meyer, Leonard Leifels, Stefan Schob, Nikita Garnov, Alexey Surov
OBJECTIVE: Nowadays, multiparametric investigations of head and neck squamous cell carcinoma (HNSCC) are established. These approaches can better characterize tumor biology and behavior. Diffusion weighted imaging (DWI) can by means of apparent diffusion coefficient (ADC) quantitatively characterize different tissue compartments. Dynamic contrast-enhanced magnetic resonance imaging (DCE MRI) reflects perfusion and vascularization of tissues. Recently, a novel approach of data acquisition, namely histogram analysis of different images is a novel diagnostic approach, which can provide more information of tissue heterogeneity...
September 28, 2017: Magnetic Resonance Imaging
https://www.readbyqxmd.com/read/28961382/characterization-and-stratification-of-prostate-lesions-based-on-comprehensive-multiparametric-mri-using-detailed-whole-mount-histopathology-as-a-reference-standard
#19
Olga Starobinets, Jeffry P Simko, Kyle Kuchinsky, John Kornak, Peter R Carroll, Kirsten L Greene, John Kurhanewicz, Susan M Noworolski
The purpose of this study was to characterize prostate cancer (PCa) based on multiparametric MR (mpMR) measures derived from MRI, diffusion, spectroscopy, and dynamic contrast-enhanced (DCE) MRI, and to validate mpMRI in detecting PCa and predicting PCa aggressiveness by correlating mpMRI findings with whole-mount histopathology. Seventy-eight men with untreated PCa received 3 T mpMR scans prior to radical prostatectomy. Cancerous regions were outlined, graded, and cancer amount estimated on whole-mount histology...
September 29, 2017: NMR in Biomedicine
https://www.readbyqxmd.com/read/28959212/multiparametric-renal-magnetic-resonance-imaging-validation-interventions-and-alterations-in-chronic-kidney-disease
#20
Eleanor F Cox, Charlotte E Buchanan, Christopher R Bradley, Benjamin Prestwich, Huda Mahmoud, Maarten Taal, Nicholas M Selby, Susan T Francis
Background: This paper outlines a multiparametric renal MRI acquisition and analysis protocol to allow non-invasive assessment of hemodynamics (renal artery blood flow and perfusion), oxygenation (BOLD T2(*)), and microstructure (diffusion, T1 mapping). Methods: We use our multiparametric renal MRI protocol to provide (1) a comprehensive set of MRI parameters [renal artery and vein blood flow, perfusion, T1, T2(*), diffusion (ADC, D, D(*), fp), and total kidney volume] in a large cohort of healthy participants (127 participants with mean age of 41 ± 19 years) and show the MR field strength (1...
2017: Frontiers in Physiology
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