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multiparametric magnetic resonance imaging

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https://www.readbyqxmd.com/read/28933973/magnetic-resonance-imaging-in-the-early-detection-of-prostate-cancer-and-review-of-the-literature-on-magnetic-resonance-imaging-stratified-clinical-pathways
#1
Taimur Tariq Shah, Wilson King Lim To, Hashim Uddin Ahmed
With level 1 evidence now available on the diagnostic accuracy of multiparametric magnetic resonance imaging (MRI) we must now utilise this data in developing an MRI-stratified diagnostic pathway for the early detection of prostate cancer. Areas covered: A literature review was conducted and identified seven randomised control trials (RCT's) assessing the diagnostic accuracy of such a pathway against the previously accepted systematic/random trans-rectal ultrasound guided (TRUS) biopsy pathway. The studies were heterogeneous in their design...
September 21, 2017: Expert Review of Anticancer Therapy
https://www.readbyqxmd.com/read/28931401/a-novel-multiparametric-imaging-approach-to-acute-myocarditis-using-t2-mapping-and-cmr-feature-tracking
#2
Bettina Baeßler, Melanie Treutlein, Frank Schaarschmidt, Christian Stehning, Bernhard Schnackenburg, Guido Michels, David Maintz, Alexander C Bunck
BACKGROUND: The aim of this study was to evaluate the diagnostic potential of a novel cardiovascular magnetic resonance (CMR) based multiparametric imaging approach in suspected myocarditis and to compare it to traditional Lake Louise criteria (LLC). METHODS: CMR data from 67 patients with suspected acute myocarditis were retrospectively analyzed. Seventeen age- and gender-matched healthy subjects served as control. T2-mapping data were acquired using a Gradient-Spin-Echo T2-mapping sequence in short-axis orientation...
September 21, 2017: Journal of Cardiovascular Magnetic Resonance
https://www.readbyqxmd.com/read/28927782/development-and-internal-validation-of-prediction-models-for-biochemical-failure-and-composite-failure-after-focal-salvage-high-intensity-focused-ultrasound-for-local-radiorecurrent-prostate-cancer-presentation-of-risk-scores-for-individual-patient-prognoses
#3
Max Peters, Abi Kanthabalan, Taimur T Shah, Neil McCartan, Caroline M Moore, Manit Arya, Jochem R van der Voort van Zyp, Marinus A Moerland, Richard G Hindley, Mark Emberton, Hashim U Ahmed
PURPOSE: Patient selection for focal salvage remains difficult. Therefore, we developed and internally validated prediction models for biochemical failure (BF) and a composite endpoint (CE) following focal salvage high intensity focused ultrasound (HIFU) for radiorecurrent prostate cancer. MATERIALS AND METHODS: A prospective HIFU registry identified 150 cases (November 2006-August 2015). Recurrence was assessed with multiparametric magnetic resonance imaging (MRI) combined with template prostate mapping biopsies, targeted biopsies, or systematic transrectal ultrasound-guided biopsies...
September 15, 2017: Urologic Oncology
https://www.readbyqxmd.com/read/28921850/prospective-comparison-of-transperineal-mri-ultrasound-fusion-biopsy-and-transrectal-systematic-biopsy-in-biopsy-na%C3%A3-ve-patients
#4
Angelika Borkowetz, Boris Hadaschik, Ivan Platzek, Marieta Toma, Georgi Torsev, Theresa Renner, Roman Herout, Martin Baunacke, Michael Laniado, Gustavo Baretton, Jan Philipp Radtke, Claudia Kesch, Markus Hohenfellner, Michael Froehner, Heinz-Peter Schlemmer, Manfred Wirth, Stefan Zastrow
OBJECTIVES: To evaluate the value of multiparametric magnetic resonance imaging (mpMRI) for the detection of significant prostate cancer (PCa) and to compare transperineal MRI/ultrasound-fusion biopsy (fusPbx) to conventional transrectal systematic biopsy (sysPbx) in biopsy-naïve patients. PATIENTS AND METHODS: This multicentre, prospective trial investigated biopsy-naïve patients with suspicion of PCa undergoing transperineal fusPbx in combination with transrectal sysPbx (comPbx)...
September 16, 2017: BJU International
https://www.readbyqxmd.com/read/28906339/multiparametric-magnetic-resonance-imaging-of-prostate-cancer-bone-disease-correlation-with-bone-biopsy-histological-and-molecular-features
#5
Raquel Perez-Lopez, Daniel Nava Rodrigues, Ines Figueiredo, Joaquin Mateo, David J Collins, Dow-Mu Koh, Johann S de Bono, Nina Tunariu
OBJECTIVES: The aim of this study was to correlate magnetic resonance imaging (MRI) of castration-resistant prostate cancer (CRPC) bone metastases with histological and molecular features of bone metastases. MATERIALS AND METHODS: Forty-three bone marrow biopsies from 33 metastatic CRPC (mCRPC) patients with multiparametric MRI and documented bone metastases were evaluated. A second cohort included 10 CRPC patients with no bone metastases. Associations of apparent diffusion coefficient (ADC), normalized b900 diffusion-weighted imaging (nDWI) signal, and signal-weighted fat fraction (swFF) with bone marrow biopsy histological parameters were evaluated using Mann-Whitney U test and Spearman correlations...
September 12, 2017: Investigative Radiology
https://www.readbyqxmd.com/read/28887398/-64-cucl2-pet-ct-in-prostate-cancer-relapse
#6
Arnoldo Piccardo, Francesco Paparo, Matteo Puntoni, Sergio Righi, Gianluca Bottoni, Lorenzo Bacigalupo, Silvia Zanardi, Andrea DeCensi, Giulia Ferrarazzo, Monica Gambaro, Filippo Grillo Ruggieri, Fabio Campodonico, Laura Tomasello, Luca Timossi, Simona Sola, Egesta Lopci, Manlio Cabria
To evaluate the biodistribution, kinetics and radiation dosimetry of (64)CuCl2 in humans and to assess the ability of (64)CuCl2-PoPET/CT to detect prostate cancer (PCa) recurrence in patients with biochemical relapse. Methods: we prospectively evaluated 50 PCa patients with biochemical relapse after surgery or external-beam radiation therapy. All patients underwent (64)CuCl2-PET/CT, (18)F-Choline-PET/CT and multiparametric magnetic resonance imaging (mpMRI) within 15 days of each other. Experienced readers interpreted the images, and the detection rate (DR) of each imaging modality was calculated...
September 8, 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/28884957/long-term-sequelae-of-hippocampal-lesions-in-patients-with-transient-global-amnesia-a-multiparametric-mri-study
#7
Xiaochuan Wang, Ran Zhang, Wenping Wei, Haibo Jiang, Zhongming Gao, Jianzhong Lin, Jiaxing Zhang
BACKGROUND: MRI signal diffusion-weighted imaging (DWI) hyperintensity in the hippocampus in patients with transient global amnesia (TGA) are resolved within several days after the onset of TGA. PURPOSE: To use multiparametric MRI to unravel the sequelae of TGA. STUDY TYPE: A prospective longitudinal study. POPULATION: Eight TGA patients. FIELD STRENGTH/SEQUENCE: A 3.0T Siemens Tim Trio MRI scanner with T1 -weighted MPRAGE, diffusion-weighted echo planar imaging, and multiecho gradient-recalled echo sequences...
September 7, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28867582/-pathological-findings-of-visible-and-non-visible-tumors-on-multiparametric-magnetic-resonance-imaging-mri-prior-to-radical-prostatectomy
#8
A Rivière, F Cornud, F Beuvon, M Sibony, P Legmann, N Barry Delongchamps
INTRODUCTION: As urologists are questioned about the overtreatment of localized prostate cancer, multiparametric MRI can diagnose significant prostate cancer thanks to targeted biopsies. However, some tumors cannot be detected by MRI. What are the pathological characteristics of those tumors? MATERIALS AND METHODS: We have selected 144 consecutive patients treated with radical prostatectomy for clinically localized prostate cancer diagnosed on systematic and targeted biopsies (Koelis(®)) according to multiparametric MRI findings...
August 31, 2017: Progrès en Urologie
https://www.readbyqxmd.com/read/28862352/geometric-distortion-correction-in-prostate-diffusion-weighted-mri-and-its-effect-on-quantitative-apparent-diffusion-coefficient-analysis
#9
Gabriel Nketiah, Kirsten M Selnaes, Elise Sandsmark, Jose R Teruel, Brage Krüger-Stokke, Helena Bertilsson, Tone F Bathen, Mattijs Elschot
PURPOSE: To evaluate the effect of correction for B0 inhomogeneity-induced geometric distortion in echo-planar diffusion-weighted imaging on quantitative apparent diffusion coefficient (ADC) analysis in multiparametric prostate MRI. METHODS: Geometric distortion correction was performed in echo-planar diffusion-weighted images (b = 0, 50, 400, 800 s/mm(2) ) of 28 patients, using two B0 scans with opposing phase-encoding polarities. Histology-matched tumor and healthy tissue volumes of interest delineated on T2 -weighted images were mapped to the nondistortion-corrected and distortion-corrected data sets by resampling with and without spatial coregistration...
September 1, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28856386/-focal-therapy-of-prostate-cancer
#10
R Ganzer, T Franiel, J Köllermann, T Kuru, D Baumunk, A Blana, B Hadaschik, J von Hardenberg, T Henkel, K-U Köhrmann, U-B Liehr, S Machtens, A Roosen, G Salomon, H-P Schlemmer, L Sentker, J Wendler, U Witzsch, M Schostak
The target of focal therapy (FT) in prostate cancer (PC) is partial treatment of the prostate aiming at preserving surrounding anatomical structures. The intention is to minimize typical side effects of radical treatment options combined with local tumor control. Numerous established and new technologies are used. Results of published studies showed a good safety profile, few side effects and good preservation of functional results. Oncologic long-term data are lacking so far. Photodynamic therapy (PDT) is the only technology that has been studied in a published prospective randomized trial...
August 30, 2017: Der Urologe. Ausg. A
https://www.readbyqxmd.com/read/28855627/induced-pluripotent-stem-cell-derived-neural-stem-cell-therapy-enhances-recovery-in-an-ischemic-stroke-pig-model
#11
Emily W Baker, Simon R Platt, Vivian W Lau, Harrison E Grace, Shannon P Holmes, Liya Wang, Kylee Jo Duberstein, Elizabeth W Howerth, Holly A Kinder, Steve L Stice, David C Hess, Hui Mao, Franklin D West
Induced pluripotent stem cell-derived neural stem cells (iNSCs) have significant potential as an autologous, multifunctional cell therapy for stroke, which is the primary cause of long term disability in the United States and the second leading cause of death worldwide. Here we show that iNSC transplantation improves recovery through neuroprotective, regenerative, and cell replacement mechanisms in a novel ischemic pig stroke model. Longitudinal multiparametric magnetic resonance imaging (MRI) following iNSC therapy demonstrated reduced changes in white matter integrity, cerebral blood perfusion, and brain metabolism in the infarcted tissue...
August 30, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28852490/the-importance-of-accurate-measurement-of-aortic-stiffness-in-patients-with-chronic-kidney-disease-and-end-stage-renal-disease
#12
Sherna F Adenwalla, Matthew P M Graham-Brown, Francesca M T Leone, James O Burton, Gerry P McCann
Cardiovascular (CV) disease is the leading cause of death in chronic kidney disease (CKD) and end-stage renal disease (ESRD). A key driver in this pathology is increased aortic stiffness, which is a strong, independent predictor of CV mortality in this population. Aortic stiffening is a potentially modifiable biomarker of CV dysfunction and in risk stratification for patients with CKD and ESRD. Previous work has suggested that therapeutic modification of aortic stiffness may ameliorate CV mortality. Nevertheless, future clinical implementation relies on the ability to accurately and reliably quantify stiffness in renal disease...
August 2017: Clinical Kidney Journal
https://www.readbyqxmd.com/read/28833636/heterogeneity-of-systolic-dysfunction-in-patients-with-severe-aortic-stenosis-and-preserved-ejection-fraction
#13
Brian R Lindman, Qi Liu, Brian P Cupps, Pamela K Woodard, Eric Novak, Anna M Vatterott, Danielle J Koerner, Kevin Kulshrestha, Michael K Pasque
BACKGROUND AND AIM: Left ventricular (LV) systolic strain has been shown to be an early marker of LV dysfunction in patients with severe aortic stenosis (AS) despite preserved ejection fraction (EF). Echocardiography has provided useful data on regional LV strain patterns, but is not as sensitive as magnetic resonance imaging (MRI). No prior studies have used MRI-based strain analysis to characterize regional three-dimensional strain in patients with severe AS. METHODS: Twelve patients with severe AS and preserved EF underwent MRI-based multiparametric strain analysis...
August 2017: Journal of Cardiac Surgery
https://www.readbyqxmd.com/read/28830850/irreversible-electroporation-for-the-treatment-of-localized-prostate-cancer-a-summary-of-imaging-findings-and-treatment-feedback
#14
Matthijs J Scheltema, Arnoud W Postema, Daniel M de Bruin, Mara Buijs, Marc R Engelbrecht, M Pilar Laguna, Hessel Wijkstra, Theo M de Reijke, Jean J M C H de la Rosette
PURPOSE: Imaging plays a crucial role in ablative therapies for prostate cancer (PCa). Irreversible electroporation (IRE) is a new treatment modality used for focal treatment of PCa. We aimed to demonstrate what imaging modalities can be used by descriptively reporting contrast-enhanced ultrasonography (CEUS), multiparametric magnetic resonance imaging (mpMRI), and grey-scale transrectal ultrasound (TRUS) results. Furthermore, we aimed to correlate quantitatively the ablation zone seen on mpMRI and CEUS with treatment planning to provide therapy feedback...
August 22, 2017: Diagnostic and Interventional Radiology: Official Journal of the Turkish Society of Radiology
https://www.readbyqxmd.com/read/28830754/focal-therapy-eligibility-determined-by-mri-us-fusion-biopsy
#15
Nima Nassiri, Edward Chang, Patricia Lieu, Alan M Priester, Daniel J A Margolis, Jiaoti Huang, Robert E Reiter, Frederick J Dorey, Leonard S Marks, Shyam Natarajan
PURPOSE: To assess focal therapy (FT) eligibility among men receiving multiparametric magnetic resonance imaging (mpMRI) and targeted biopsy, with correlation to whole mount histology after radical prostatectomy (RP). MATERIALS AND METHODS: Subjects were selected from among the 454 men (2010-2016) with targeted biopsy-proven prostate cancer (CaP) derived from regions of interest (ROI) on mpMRI. FT eligibility was limited to a maximum Gleason score (GS) of 4+3 within ROIs with or without other foci of low-risk CaP (GS 3+3, < 4 mm)...
August 19, 2017: Journal of Urology
https://www.readbyqxmd.com/read/28830203/multimodal-image-registration-for-the-identification-of-dominant-intraprostatic-lesion-in-high-precision-radiotherapy-treatments
#16
Delia Ciardo, Barbara Alicja Jereczek-Fossa, Giuseppe Petralia, Giorgia Timon, Dario Zerini, Raffaella Cambria, Elena Rondi, Federica Cattani, Alessia Bazani, Rosalinda Ricotti, Maria Garioni, Davide Maestri, Giulia Marvaso, Paola Romanelli, Marco Riboldi, Guido Baroni, Roberto Orecchia
PURPOSE: The integration of computed tomography (CT) and multiparametric magnetic resonance imaging (mpMRI) is a challenging task in high-precision radiotherapy for prostate cancer. A simple methodology for multimodal deformable image registration (DIR) of prostate cancer patients is presented. METHODS: CT and mpMRI of ten patients were considered. Organs at risk and prostate were contoured on both scans. The dominant intraprostatic lesion was additionally delineated on magnetic resonance imaging...
August 22, 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/28826559/magnetic-resonance-monitoring-of-disease-progression-in-mdx-mice-on-different-genetic-backgrounds
#17
Ravneet Vohra, Abhinandan Batra, Sean C Forbes, Krista Vandenborne, Glenn A Walter
Genetic modifiers alter disease progression in both preclinical models and subjects with Duchenne muscular dystrophy (DMD). Using multiparametric magnetic resonance (MR) techniques, we compared the skeletal and cardiac muscles of two different dystrophic mouse models of DMD, which are on different genetic backgrounds, the C57BL/10ScSn-Dmdmdx (B10-mdx) and D2.B10-Dmdmdx (D2-mdx). The proton transverse relaxation constant (T2) using both MR imaging and spectroscopy revealed significant age-related differences in dystrophic skeletal and cardiac muscles as compared with their age-matched controls...
September 2017: American Journal of Pathology
https://www.readbyqxmd.com/read/28805295/multi-parametric-magnetic-resonance-imaging-mpmri-identifies-significant-apical-prostate-cancers
#18
Alexander P Kenigsberg, Tsutomu Tamada, Andrew B Rosenkrantz, Elton Llukani, Fang-Ming Deng, Jonathan Melamed, Ming Zhou, Herbert Lepor
OBJECTIVE: To determine if multiparametric MRI (mpMRI) identifies significant apical disease, thereby informing decisions regarding preservation of the membranous urethra. MATERIALS AND METHODS: Men undergoing radical prostatectomy between January 2012 and June 2016 who underwent a 12-core transrectal-ultrasound guided systematic biopsy, preoperative 3-T MRI, and sectioning of the prostate specimen with tumor foci mapping were extracted from a single surgeon's prospective longitudinal outcomes database...
August 14, 2017: BJU International
https://www.readbyqxmd.com/read/28804704/hypoxia-in-cervical-cancer-from-biology-to-imaging
#19
REVIEW
Heidi Lyng, Eirik Malinen
PURPOSE: Hypoxia imaging may improve identification of cervical cancer patients at risk of treatment failure and be utilized in treatment planning and monitoring, but its clinical potential is far from fully realized. Here, we briefly describe the biology of hypoxia in cervix tumors of relevance for imaging, and evaluate positron emission tomography (PET) and magnetic resonance imaging (MRI) techniques that have shown promise for assessing hypoxia in a clinical setting. We further discuss emerging imaging approaches, and how imaging can play a role in future treatment strategies to target hypoxia...
2017: Clinical and Translational Imaging: Reviews in Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/28803622/effect-of-hyoscine-butylbromide-on-prostate-multiparametric-mri-anatomical-and-functional-image-quality
#20
R A Slough, I Caglic, N L Hansen, A J Patterson, T Barrett
AIM: To evaluate the effect of the spasmolytic agent hyoscine butylbromide (HBB) on the quality of anatomical and functional imaging of the prostate. MATERIALS AND METHODS: One hundred and seventy-three patients were included in this retrospective study. Eighty-seven patients received intravenous HBB prior to scanning (HBB group) and 86 patients did not (non-HBB group). Multiparametric (mp) 3 T magnetic resonance imaging (MRI) was performed using a 32-channel body coil...
August 10, 2017: Clinical Radiology
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