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Multiparametric imaging

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https://www.readbyqxmd.com/read/29342201/differentiation-of-glioblastoma-multiforme-metastases-and-primary-central-nervous-system-lymphomas-using-multiparametric-perfusion-and-diffusion-mr-imaging-of-a-tumor-core-and-a-peritumoral-zone-searching-for-a-practical-approach
#1
Małgorzata Neska-Matuszewska, Joanna Bladowska, Marek Sąsiadek, Anna Zimny
INTRODUCTION: In conventional MR examinations glioblastomas multiforme (GBMs), metastases and primary CNS lymphomas (PCNSLs) may show very similar appearance. The aim of the study was to evaluate usefulness of multiparametric T2*DSC perfusion and diffusion MR imaging in the preoperative differentiation of these tumors. MATERIAL AND METHODS: Seventy four solitary enhancing tumors (27 GBMs, 30 metastases, 17 PCNSLs) were enrolled in the study. Parameters of cerebral blood volume (rCBV), peak height (rPH), percentage of signal recovery (rPSR) and apparent diffusion coefficient (ADC) were assessed from the tumor core and the peritumoral non-enhancing T2-hyperintense zone...
2018: PloS One
https://www.readbyqxmd.com/read/29340286/cancer-imaging-phenomics-toolkit-quantitative-imaging-analytics-for-precision-diagnostics-and-predictive-modeling-of-clinical-outcome
#2
Christos Davatzikos, Saima Rathore, Spyridon Bakas, Sarthak Pati, Mark Bergman, Ratheesh Kalarot, Patmaa Sridharan, Aimilia Gastounioti, Nariman Jahani, Eric Cohen, Hamed Akbari, Birkan Tunc, Jimit Doshi, Drew Parker, Michael Hsieh, Aristeidis Sotiras, Hongming Li, Yangming Ou, Robert K Doot, Michel Bilello, Yong Fan, Russell T Shinohara, Paul Yushkevich, Ragini Verma, Despina Kontos
The growth of multiparametric imaging protocols has paved the way for quantitative imaging phenotypes that predict treatment response and clinical outcome, reflect underlying cancer molecular characteristics and spatiotemporal heterogeneity, and can guide personalized treatment planning. This growth has underlined the need for efficient quantitative analytics to derive high-dimensional imaging signatures of diagnostic and predictive value in this emerging era of integrated precision diagnostics. This paper presents cancer imaging phenomics toolkit (CaPTk), a new and dynamically growing software platform for analysis of radiographic images of cancer, currently focusing on brain, breast, and lung cancer...
January 2018: Journal of Medical Imaging
https://www.readbyqxmd.com/read/29339663/evaluation-of-magnetic-resonance-imaging-ultrasound-fusion-biopsy-in-patients-with-low-risk-prostate-cancer-under-active-surveillance-undergoing-surveillance-biopsy
#3
Angelika Borkowetz, Theresa Renner, Ivan Platzek, Marieta Toma, Roman Herout, Martin Baunacke, Christer Groeben, Johannes Huber, Michael Laniado, Gustavo B Baretton, Michael Froehner, Stefan Zastrow, Manfred P Wirth
INTRODUCTION: Targeted biopsy of tumour-suspicious lesions detected in multiparametric magnetic resonance imaging (mpMRI) plays an increasing role in the active surveillance (AS) of patients with low-risk prostate cancer (PCa). The aim of this study was to compare MRI/ultrasound-fusion biopsy (fusPbx) with systematic biopsy (sysPbx) in patients undergoing biopsy for AS. METHODS: Patients undergoing mpMRI and transperineal fusPbx combined with transrectal sysPbx (comPbx) as surveillance biopsy were investigated...
January 16, 2018: Urologia Internationalis
https://www.readbyqxmd.com/read/29336979/prostate-magnetic-resonance-imaging-the-truth-lies-in-the-eye-of-the-beholder
#4
Joseph C Riney, Nabeel E Sarwani, Shehzad Siddique, Jay D Raman
PURPOSE: To determine the diagnostic accuracy and interobserver variability of radiologic interpretation of magnetic resonance imaging (MRI) performed for surgical planning before prostatectomy. PATIENTS AND METHODS: The records of 233 men undergoing prostatectomy with presurgical multiparametric 3T surface body coil MRI were reviewed. All initial films were read by a fellowship-trained body radiologist provided with relevant clinical information. A senior radiologist then reread all pelvic MRIs blinded to the initial interpretation with findings from both readings compared to final pathology...
January 11, 2018: Urologic Oncology
https://www.readbyqxmd.com/read/29333958/focal-mri-guided-salvage-high-dose-rate-brachytherapy-in-patients-with-radiorecurrent-prostate-cancer
#5
Metha Maenhout, Max Peters, Marco van Vulpen, Marinus A Moerland, Richard P Meijer, Maurice A A J van den Bosch, Paul L Nguyen, Steven J Frank, Jochem R N van der Voort van Zyp
INTRODUCTION: Whole-gland salvage treatment of radiorecurrent prostate cancer has a high rate of severe toxicity. The standard of care in case of a biochemical recurrence is androgen deprivation treatment, which is associated with morbidity and negative effects on quality of life. A salvage treatment with acceptable toxicity might postpone the start of androgen deprivation treatment, might have a positive influence on the patients' quality of life, and might even be curative. Here, toxicity and biochemical outcome are described after magnetic resonance imaging-guided focal salvage high-dose-rate brachytherapy in patients with radiorecurrent prostate cancer...
December 2017: Technology in Cancer Research & Treatment
https://www.readbyqxmd.com/read/29331622/value-of-serial-multiparametric-magnetic-resonance-imaging-and-magnetic-resonance-imaging-guided-biopsies-in-men-with-low-risk-prostate-cancer-on-active-surveillance-after-1-yr-follow-up
#6
Esther Hendrika Johanna Hamoen, Caroline M A Hoeks, Diederik M Somford, Inge M van Oort, Henk Vergunst, Jorg R Oddens, Geert A Smits, Leonard P Bokhorst, J Alfred Witjes, Maroeska M Rovers, Christina A Hulsbergen-van de Kaa, Jelle O Barentsz
BACKGROUND: Active surveillance (AS) aims to reduce overtreatment of low-risk prostate cancer (PC). Incorporating multiparametric magnetic resonance imaging (mp-MRI) and MR-guided biopsy (MRGB) in an AS protocol might contribute to more accurate identification of AS candidates. OBJECTIVE: To evaluate the value of 3T mp-MRI and MRGB in PC patients on AS at inclusion and after 12-mo follow-up. DESIGN, SETTING, AND PARTICIPANTS: Patients with cT1c-cT2 PC, prostate-specific antigen (PSA) ≤10ng/ml, PSA density <0...
January 10, 2018: European Urology Focus
https://www.readbyqxmd.com/read/29331575/validation-of-mri-to-trus-registration-for-high-dose-rate-prostate-brachytherapy
#7
Eric Poulin, Karim Boudam, Csaba Pinter, Samuel Kadoury, Andras Lasso, Gabor Fichtinger, Cynthia Ménard
PURPOSE: The objective of this study was to develop and validate an open-source module for MRI to transrectal ultrasound (TRUS) registration to support tumor-targeted prostate brachytherapy. METHODS AND MATERIALS: In this study, 15 patients with prostate cancer lesions visible on multiparametric MRI were selected for the validation. T2-weighted images with 1-mm isotropic voxel size and diffusion weighted images were acquired on a 1.5T Siemens imager. Three-dimensional (3D) TRUS images with 0...
January 10, 2018: Brachytherapy
https://www.readbyqxmd.com/read/29321034/diagnostic-and-prognostic-utility-of-cardiovascular-magnetic-resonance-imaging-in-heart-failure-with-preserved-ejection-fraction-implications-for-clinical-trials
#8
Prathap Kanagala, Adrian S H Cheng, Anvesha Singh, John McAdam, Anna-Marie Marsh, Jayanth R Arnold, Iain B Squire, Leong L Ng, Gerry P McCann
BACKGROUND: Heart failure with preserved ejection fraction (HFpEF) is a poorly characterized condition. We aimed to phenotype patients with HFpEF using multiparametric stress cardiovascular magnetic resonance imaging (CMR) and to assess the relationship to clinical outcomes. METHODS: One hundred and fifty four patients (51% male, mean age 72 ± 10 years) with a diagnosis of HFpEF underwent transthoracic echocardiography and CMR during a single study visit. The CMR protocol comprised cine, stress/rest perfusion and late gadolinium enhancement imaging on a 3T scanner...
January 11, 2018: Journal of Cardiovascular Magnetic Resonance
https://www.readbyqxmd.com/read/29318905/multiparametric-mri-for-early-detection-of-diffuse-liver-disease-an-interview-with-david-breen
#9
David J Breen
David J Breen is Associate Professor of Radiology and previous Clinical Director of Radiology at University Hospital Southampton. His interests are in abdominal imaging and intervention, particularly of hepato-pancreato-biliary (HPB)and renal disease. He has a major interest in image-guided tumor ablation and improving outcomes from these procedures. He has previously served as Vice Chair of the NHS England Clinical Reference Group in Interventional Radiology and for the NIHR/NCRN Upper GI Clinical Studies Group...
January 10, 2018: Biomarkers in Medicine
https://www.readbyqxmd.com/read/29317377/multiparametric-mri-for-the-detection-of-local-recurrence-of-prostate-cancer-in-the-setting-of-biochemical-recurrence-after-low-dose-rate-brachytherapy
#10
Luca F Valle, Matthew D Greer, Joanna H Shih, Tristan Barrett, Yan Mee Law, Andrew B Rosenkrantz, Haytham Shebel, Akhil Muthigi, Daniel Su, Maria J Merino, Bradford J Wood, Peter A Pinto, Andra V Krauze, Aradhana Kaushal, Peter L Choyke, Barış Türkbey, Deborah E Citrin
PURPOSE: Prostate multiparametric magnetic resonance imaging (mpMRI) has utility in detecting post-radiotherapy local recurrence. We conducted a multireader study to evaluate the diagnostic performance of mpMRI for local recurrence after low dose rate (LDR) brachytherapy. METHODS: A total of 19 patients with biochemical recurrence after LDR brachytherapy underwent 3T endorectal coil mpMRI with T2-weighted imaging, dynamic contrast-enhanced imaging (DCE) and diffusion-weighted imaging (DWI) with pathologic confirmation...
January 2018: Diagnostic and Interventional Radiology: Official Journal of the Turkish Society of Radiology
https://www.readbyqxmd.com/read/29316243/development-of-an-alginate-array-platform-to-decouple-the-effect-of-multiparametric-perturbations-on-human-pluripotent-stem-cells-during-pancreatic-differentiation
#11
Thomas C Richardson, Shibin Mathew, Joseph E Candiello, Saik K Goh, Prashant N Kumta, Ipsita Banerjee
Human embryonic stem cells (hESC)-derived functional cells hold great promise for regenerative cell therapy. Currently approved strategies for clinical translation requires the isolation of the hESCs-derived cells in materials allowing transfer of reagents but preventing integration with the host. However, hESC fate is known to be sensitive to its local microenvironment, both chemical and physical. Given the complexity of hESC response to environmental parameters, it will be important to evaluate the cell response to multiple combinatorial perturbations...
January 5, 2018: Biotechnology Journal
https://www.readbyqxmd.com/read/29312542/the-management-of-active-surveillance-in-prostate-cancer-validation-of-the-canary-prostate-active-surveillance-study-risk-calculator-with-the-spanish-urological-association-registry
#12
Ángel Borque-Fernando, José Rubio-Briones, Luis Mariano Esteban, Argimiro Collado-Serra, Yoni Pallás-Costa, Pedro Ángel López-González, Jorge Huguet-Pérez, José Ignacio Sanz-Vélez, Jesús Manuel Gil-Fabra, Enrique Gómez-Gómez, Cristina Quicios-Dorado, Lluis Fumadó, Sara Martínez-Breijo, Juan Soto-Villalba
The follow up of patients on active surveillance requires to repeat prostate biopsies. Predictive models that identify patients at low risk of progression or reclassification are essential to reduce the number of unnecessary biopsies. The aim of this study is to validate the Prostate Active Surveillance Study risk calculator (PASS-RC) in the multicentric Spanish Urological Association Registry of patients on active surveillance (AS), from common clinical practice. Results: We find significant differences in age, PSA and clinical stage between our validation cohort and the PASS-RC generation cohort (p < ...
December 12, 2017: Oncotarget
https://www.readbyqxmd.com/read/29306515/multiparametric-magnetic-resonance-imaging-for-prostate-specific-antigen-recurrence-after-radical-prostatectomy-are-we-leaving-the-one-treatment-fits-all-approach-and-moving-towards-personalized-imaging-guided-treatment
#13
EDITORIAL
https://www.readbyqxmd.com/read/29303080/latest-evidence-on-the-role-of-multiparametric-magnetic-resonance-imaging-in-active-surveillance-for-insignificant-prostate-cancer-a-systematic-review
#14
Francesco Cantiello, Stefano Manno, Antonio Cicione, Rocco Damiano
OBJECTIVE: Multiparametric Magnetic Resonance Imaging (mpMRI) has become a very useful tool in the management of low risk Prostate Cancer (PCa) patients eligible for Active Surveillance (AS). The aim of this systematic review was to critically review the latest literature concerning the role of mpMRI in this clinical setting, underlying current strengths and weakness. EVIDENCE ACQUISITION: A comprehensive literature research for English-language original and review articles was carried out using the National Center for Biotechnology Information PubMed database with the aim of identify studies on mpMRI for AS in low risk PCa patients...
January 4, 2018: Anti-cancer Agents in Medicinal Chemistry
https://www.readbyqxmd.com/read/29301780/multiparametric-analysis-of-permeability-and-adc-histogram-metrics-for-classification-of-pediatric-brain-tumors-by-tumor-grade
#15
S Vajapeyam, D Brown, P R Johnston, K I Ricci, M W Kieran, H G W Lidov, T Y Poussaint
BACKGROUND AND PURPOSE: Accurate tumor grading is essential for treatment planning of pediatric brain tumors. We hypothesized that multiparametric analyses of a combination of permeability metrics and ADC histogram metrics would differentiate high- and low-grade tumors with high accuracy. MATERIALS AND METHODS: DTI and dynamic contrast-enhanced MR imaging using T1-mapping with flip angles of 2°, 5°, 10°, and 15°, followed by a 0.1-mmol/kg body weight gadolinium-based bolus was performed on all patients in addition to standard MR imaging...
January 4, 2018: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/29279171/support-vector-machines-svm-classification-of-prostate-cancer-gleason-score-in-central-gland-using-multiparametric-magnetic-resonance-images-a-cross-validated-study
#16
Jiance Li, Zhiliang Weng, Huazhi Xu, Zhao Zhang, Haiwei Miao, Wei Chen, Zheng Liu, Xiaoqin Zhang, Meihao Wang, Xiao Xu, Qiong Ye
PURPOSE: To assess the performance of Support Vector Machines (SVM) classification to stratify the Gleason Score (GS) of prostate cancer (PCa) in the central gland (CG) based on image features across multiparametric magnetic resonance imaging (mpMRI). MATERIALS AND METHODS: This retrospective study was approved by the institutional review board, and informed consent was waived. One hundred fifty-two CG cancerous ROIs were identified through radiological-pathological correlation...
January 2018: European Journal of Radiology
https://www.readbyqxmd.com/read/29279161/accuracy-of-multiparametric-mr-imaging-with-pi-rads-v2-assessment-in-detecting-infiltration-of-the-neurovascular-bundles-prior-to-prostatectomy
#17
Markus Sauer, Julius M Weinrich, Christoph Fraune, Georg Salomon, Pierre Tennstedt, Gerhard Adam, Dirk Beyersdorff
OBJECTIVES: To evaluate the accuracy of assessment of neurovascular bundle (NVB) infiltration using multiparametric magnetic resonance imaging (mpMRI) and PI-RADS V2 prior to prostatectomy. METHODS: The ethics committee approved this retrospective study with waiver of informed consent. N=198 consecutive patients with biopsy proved cancer underwent standardized mpMRI at 3T prior to surgery. NVB infiltration was assessed for each side (a total of 396). Maximum PI-RADS V2 scores were determined for the posterolateral areas adjacent to the NVBs...
January 2018: European Journal of Radiology
https://www.readbyqxmd.com/read/29277404/multiparametric-measurement-of-cerebral-physiology-using-calibrated-fmri
#18
Molly G Bright, Paula L Croal, Nicholas P Blockley, Daniel P Bulte
The ultimate goal of calibrated fMRI is the quantitative imaging of oxygen metabolism (CMRO2), and this has been the focus of numerous methods and approaches. However, one underappreciated aspect of this quest is that in the drive to measure CMRO2, many other physiological parameters of interest are often acquired along the way. This can significantly increase the value of the dataset, providing greater information that is clinically relevant, or detail that can disambiguate the cause of signal variations. This can also be somewhat of a double-edged sword: calibrated fMRI experiments combine multiple parameters into a physiological model that requires multiple steps, thereby providing more opportunity for error propagation and increasing the noise and error of the final derived values...
December 19, 2017: NeuroImage
https://www.readbyqxmd.com/read/29275309/detection-of-local-recurrence-with-3-tesla-mri-after-radical-prostatectomy-a-useful-method-for-radiation-treatment-planning
#19
Daniel Buergy, Metin Sertdemir, Anja Weidner, Mohamed Shelan, Frank Lohr, Frederik Wenz, Stefan O Schoenberg, Ulrike I Attenberger
BACKGROUND/AIM: Salvage radiotherapy improves biochemical control in patients with recurrence of prostate cancer after prostatectomy. Radiotherapy target volumes of the prostatic fossa are based on empirical data and differ between different guidelines. Localization of recurrence with multiparametric magnetic resonance imaging (MRI) might be a feasible approach to localize recurrent lesions. PATIENTS AND METHODS: Twenty-one patients with biochemical recurrence after radical prostatectomy were included (median prostate-specific antigen (PSA) =0...
January 2018: In Vivo
https://www.readbyqxmd.com/read/29273407/re-what-are-we-missing-false-negative-cancers-at-multiparametric-mr-imaging-of-the-prostate
#20
Tine Hajdinjak, Alexandre E Pelzer
No abstract text is available yet for this article.
December 19, 2017: European Urology
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