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pathology image analysis

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https://www.readbyqxmd.com/read/28821786/co-registration-of-ex-vivo-surgical-histopathology-and-in-vivo-t2-weighted-mri-of-the-prostate-via-multi-scale-spectral-embedding-representation
#1
Lin Li, Shivani Pahwa, Gregory Penzias, Mirabela Rusu, Jay Gollamudi, Satish Viswanath, Anant Madabhushi
Multi-modal image co-registration via optimizing mutual information (MI) is based on the assumption that intensity distributions of multi-modal images follow a consistent relationship. However, images with a substantial difference in appearance violate this assumption, thus MI directly based on image intensity alone may be inadequate to drive similarity based co-registration. To address this issue, we introduce a novel approach for multi-modal co-registration called Multi-scale Spectral Embedding Registration (MSERg)...
August 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28819456/therapeutic-effect-of-astroglia-like-mesenchymal-stem-cells-expressing-glutamate-transporter-in-a-genetic-rat-model-of-depression
#2
Amit Shwartz, Oshra Betzer, Noam Kronfeld, Gila Kazimirsky, Simona Cazacu, Susan Finniss, Hae Kyung Lee, Menachem Motiei, Shani Yael Dagan, Rachela Popovtzer, Chaya Brodie, Gal Yadid
Recent studies have proposed that abnormal glutamatergic neurotransmission and glial pathology play an important role in the etiology and manifestation of depression. It was postulated that restoration of normal glutamatergic transmission, by enhancing glutamate uptake, may have a beneficial effect on depression. We examined this hypothesis using unique human glial-like mesenchymal stem cells (MSCs), which in addition to inherent properties of migration to regions of injury and secretion of neurotrophic factors, were differentiated to express high levels of functional glutamate transporters (excitatory amino acid transporters; EAAT)...
2017: Theranostics
https://www.readbyqxmd.com/read/28819296/intravoxel-incoherent-motion-diffusion-weighted-imaging-for-discriminating-the-pathological-response-to-neoadjuvant-chemoradiotherapy-in-locally-advanced-rectal-cancer
#3
Wen Lu, Hou Jing, Zhou Ju-Mei, Nie Shao-Lin, Cao Fang, Yu Xiao-Ping, Lu Qiang, Zeng Biao, Zhu Su-Yu, Hu Ying
To investigate the usefulness of intravoxel incoherent motion diffusion-weighted imaging (IVIM-DWI) in discriminating the pathological complete response (pCR) to neoadjuvant chemoradiotherapy (nCRT) in locally advanced rectal cancer (LARC), 42 patients underwent preoperative IVIM-DWI before (pre-nCRT) and after nCRT (post-nCRT). The values of pre-nCRT and post-nCRT IVIM-DWI parameters (ADC, D, D* and f), together with the percentage changes (∆% parametric value) induced by nCRT, were compared between the pCR (tumour regression grade [TRG] 4) and non-pCR (TRG 0, 1, 2 or 3) groups and between the GR (TRG 3 or 4) and PR (TRG 0, 1 or 2) groups based on the Dworak TRG system...
August 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28817656/investigation-of-the-halo-artifact-in-68ga-psma-11-pet-mri
#4
Thorsten Heußer, Philipp Mann, Christopher M Rank, Martin Schäfer, Antonia Dimitrakopoulou-Strauss, Heinz-Peter Schlemmer, Boris A Hadaschik, Klaus Kopka, Peter Bachert, Marc Kachelrieß, Martin T Freitag
OBJECTIVES: Combined positron emission tomography (PET) and magnetic resonance imaging (MRI) targeting the prostate-specific membrane antigen (PSMA) with a 68Ga-labelled PSMA-analog (68Ga-PSMA-11) is discussed as a promising diagnostic method for patients with suspicion or history of prostate cancer. One potential drawback of this method are severe photopenic (halo-) artifacts surrounding the bladder and the kidneys in the scatter-corrected PET images, which have been reported to occur frequently in clinical practice...
2017: PloS One
https://www.readbyqxmd.com/read/28817609/corneal-confocal-microscopy-is-a-rapid-reproducible-ophthalmic-technique-for-quantifying-corneal-nerve-abnormalities
#5
Alise Kalteniece, Maryam Ferdousi, Safwaan Adam, Jonathan Schofield, Shazli Azmi, Ioannis Petropoulos, Handrean Soran, Rayaz A Malik
PURPOSE: To assess the effect of applying a protocol for image selection and the number of images required for adequate quantification of corneal nerve pathology using in vivo corneal confocal microscopy (IVCCM). METHODS: IVCCM was performed in 35 participants by a single examiner. For each participant, 4 observers used a standardized protocol to select 6 central corneal nerve images to assess the inter-observer variability. Furthermore, images were selected by a single observer on two occasions to assess intra-observer variability and the effect of sample size was assessed by comparing 6 with 12 images...
2017: PloS One
https://www.readbyqxmd.com/read/28817389/congenital-anomalies-of-the-optic-disc-insights-from-optical-coherence-tomography-imaging
#6
Karen W Jeng-Miller, Dean M Cestari, Eric D Gaier
PURPOSE OF REVIEW: Congenital anomalies of the optic nerve are rare but significant causes of visual dysfunction in children and adults. Accurate diagnosis is dependent on a thorough funduscopic examination, but can be enhanced by imaging information garnered from optical coherence tomography (OCT). We review common congenital optic nerve anomalies, including optic disc pit, optic nerve coloboma, morning glory disc anomaly, and hypoplasia of the optic nerve, review their systemic associations, and discuss insights from OCT imaging...
August 16, 2017: Current Opinion in Ophthalmology
https://www.readbyqxmd.com/read/28817096/time-resolved-study-of-nanomorphology-and-nanomechanic-change-of-early-stage-mineralized-electrospun-poly-lactic-acid-fiber-by-scanning-electron-microscopy-raman-spectroscopy-and-atomic-force-microscopy
#7
Mengmeng Wang, Yin Cai, Bo Zhao, Peizhi Zhu
In this study, scanning electron microscopy (SEM), Raman spectroscopy and high-resolution atomic force microscopy (AFM) were used to reveal the early-stage change of nanomorphology and nanomechanical properties of poly(lactic acid) (PLA) fibers in a time-resolved manner during the mineralization process. Electrospun PLA nanofibers were soaked in simulated body fluid (SBF) for different periods of time (0, 1, 3, 5, 7 and 21 days) at 10 °C, much lower than the conventional 37 °C, to simulate the slow biomineralization process...
August 17, 2017: Nanomaterials
https://www.readbyqxmd.com/read/28816953/peritumoral-decreased-uptake-area-of-gadoxetic-acid-enhanced-magnetic-resonance-imaging-and-tumor-recurrence-after-surgical-resection-in-hepatocellular-carcinoma-a-strobe-compliant-article
#8
Seung Kak Shin, Yun Soo Kim, Young Sup Shim, Seung Joon Choi, So Hyun Park, Dong Hae Jung, Oh Sang Kwon, Duck Joo Choi, Ju Hyun Kim
Recently, it has been suggested that peritumoral decreased uptake area (PDUA) in the hepatobiliary phase (HBP) of gadoxetic acid (Gd-EOB-DTPA)-enhanced magnetic resonance imaging (MRI) was associated with vascular invasion in hepatocellular carcinoma (HCC). We aimed to investigate correlations between microvascular invasion and PDUA, and elucidate the predictability of PDUA for tumor recurrence after resection.We retrospectively analyzed clinicopathological and radiological data from 126 consecutive patients with single HCC ≤5 cm without macrovascular invasion who underwent preoperative Gd-EOB-DTPA-enhanced MRI and surgical resection...
August 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28815472/comparison-of-pet-ct-and-whole-mount-histopathology-sections-of-the-human-prostate-a-new-strategy-for-voxel-wise-evaluation
#9
F Schiller, T Fechter, C Zamboglou, A Chirindel, N Salman, C A Jilg, V Drendel, M Werner, P T Meyer, A-L Grosu, M Mix
BACKGROUND: Implementation of PET/CT in diagnosis of primary prostate cancer (PCa) requires a profound knowledge about the tracer, preferably from a quantitative evaluation. Direct visual comparison of PET/CT slices to whole prostate sections is hampered by considerable uncertainties from imperfect coregistration and fundamentally different image modalities. In the current study, we present a novel method for advanced voxel-wise comparison of histopathology from excised prostates to pre-surgical PET...
August 17, 2017: EJNMMI Physics
https://www.readbyqxmd.com/read/28815337/fluorine-18-fluorodeoxyglucose-positron-emission-tomography-as-an-objective-substitute-for-ct-morphologic-response-criteria-in-patients-undergoing-chemotherapy-for-colorectal-liver-metastases
#10
Yujiro Nishioka, Ryuji Yoshioka, Wataru Gonoi, Toshitaka Sugawara, Shuntaro Yoshida, Masaji Hashimoto, Junichi Shindoh
PURPOSE: The computed tomography (CT) morphologic response of colorectal liver metastases (CLM) after chemotherapy is reportedly correlated with pathologic response and survival outcomes of patients undergoing surgery. However, they are rather subjective criteria and not evaluable without adequate quality of contrast-enhanced CT images. This study sought the potential use of fluorine-18-fluorodeoxyglucose (FDG) positron emission tomography (PET) as an objective substitute for predicting pathological viability of CLM after chemotherapy...
August 16, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28815110/development-of-a-framework-for-large-scale-three-dimensional-pathology-and-biomarker-imaging-and-spatial-analytics
#11
Yanhui Liang, Fusheng Wang, Pengyue Zhang, Joel H Saltz, Daniel J Brat, Jun Kong
With the rapid advancement in large-throughput scanning technologies, digital pathology has emerged as platform with promise for diagnostic approaches, but also for high-throughput quantitative data extraction and analysis for translational research. Digital pathology and biomarker images are rich sources of information on tissue architecture, cell diversity and morphology, and molecular pathway activation. However, the understanding of disease in three-dimension (3D) has been hampered by their traditional two-dimension (2D) representations on histologic slides...
2017: AMIA Summits on Translational Science Proceedings
https://www.readbyqxmd.com/read/28814795/direct-comparison-of-pet-ct-and-mri-to-predict-the-pathological-response-to-neoadjuvant-chemotherapy-in-breast-cancer-a-meta-analysis
#12
Lihua Chen, Qifang Yang, Jing Bao, Daihong Liu, Xuequan Huang, Jian Wang
Both PET/CT and breast MRI are used to assess pathological complete response to neoadjuvant chemotherapy (NAC) in patients with breast cancer. The aim is to compare the utility of PET/CT and breast MRI by using head-to-head comparative studies. Literature databases were searched prior to July 2016. Eleven studies with a total of 527 patients were included. For PET/CT, the pooled SEN was 0.87 (95% confidence interval (CI): 0.71-0.95) and SPE was 0.85 (95% CI: 0.70-0.93). For MRI, the pooled SEN was 0.79 (95% CI: 0...
August 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28814675/retinal-amyloid-pathology-and-proof-of-concept-imaging-trial-in-alzheimer-s-disease
#13
Yosef Koronyo, David Biggs, Ernesto Barron, David S Boyer, Joel A Pearlman, William J Au, Shawn J Kile, Austin Blanco, Dieu-Trang Fuchs, Adeel Ashfaq, Sally Frautschy, Gregory M Cole, Carol A Miller, David R Hinton, Steven R Verdooner, Keith L Black, Maya Koronyo-Hamaoui
BACKGROUND: Noninvasive detection of Alzheimer's disease (AD) with high specificity and sensitivity can greatly facilitate identification of at-risk populations for earlier, more effective intervention. AD patients exhibit a myriad of retinal pathologies, including hallmark amyloid β-protein (Aβ) deposits. METHODS: Burden, distribution, cellular layer, and structure of retinal Aβ plaques were analyzed in flat mounts and cross sections of definite AD patients and controls (n = 37)...
August 17, 2017: JCI Insight
https://www.readbyqxmd.com/read/28814672/vipar-a-quantitative-approach-to-3d-histopathology-applied-to-lymphatic-malformations
#14
René Hägerling, Dominik Drees, Aaron Scherzinger, Cathrin Dierkes, Silvia Martin-Almedina, Stefan Butz, Kristiana Gordon, Michael Schäfers, Klaus Hinrichs, Pia Ostergaard, Dietmar Vestweber, Tobias Goerge, Sahar Mansour, Xiaoyi Jiang, Peter S Mortimer, Friedemann Kiefer
BACKGROUND: Lack of investigatory and diagnostic tools has been a major contributing factor to the failure to mechanistically understand lymphedema and other lymphatic disorders in order to develop effective drug and surgical therapies. One difficulty has been understanding the true changes in lymph vessel pathology from standard 2D tissue sections. METHODS: VIPAR (volume information-based histopathological analysis by 3D reconstruction and data extraction), a light-sheet microscopy-based approach for the analysis of tissue biopsies, is based on digital reconstruction and visualization of microscopic image stacks...
August 17, 2017: JCI Insight
https://www.readbyqxmd.com/read/28814515/fdg-uptake-in-lymphoid-tissue-serves-as-a-predictor-of-disease-outcome-in-the-nonhuman-primate-model-of-monkeypox-infection
#15
Julie Dyall, Reed F Johnson, Svetlana Chefer, Christopher Leyson, David Thomasson, Jurgen Seidel, Dan R Ragland, Russell Byrum, Catherine Jett, Jennifer A Cann, Marisa St Claire, Elaine Jagoda, Richard C Reba, Dima Hammoud, Joseph E Blaney, Peter B Jahrling
Real-time bioimaging of infectious disease processes may aid countermeasure development and lead to an improved understanding of pathogenesis. However, few studies have identified biomarkers for monitoring infections using in vivo imaging. Previously, we demonstrated that positron emission tomography/computed tomography (PET/CT) imaging with [(18)F]-fluorodeoxyglucose (FDG) can monitor monkeypox disease progression in vivo in nonhuman primates (NHPs). In this study, we investigated [(18)F]-FDG-PET/CT imaging of immune processes in lymphoid tissues to identify patterns of inflammation in the monkepox NHP model and to determine the value of [(18)F]-FDG-PET/CT as a biomarker for disease and treatment outcomes...
August 16, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28814334/abernethy-malformation-associated-with-caroli-s-syndrome-in-a-patient-with-a-pkhd1-mutation-a-case-report
#16
Xiao-Xiao Mi, Xiao-Guang Li, Zi-Rong Wang, Ling Lin, Chun-Hai Xu, Jun-Ping Shi
BACKGROUND: Abernethy malformation is a rare congenital anomaly characterised by the partial or complete absence of the portal vein and the subsequent development of an extrahepatic portosystemic shunt. Caroli's disease is a rare congenital condition characterised by non-obstructive saccular intrahepatic bile duct dilation. Caroli's disease combined with congenital hepatic fibrosis and/or renal cystic disease is referred to - Caroli's syndrome. The combination of Abernethy malformation and Caroli's syndrome has not been reported previously...
August 16, 2017: Diagnostic Pathology
https://www.readbyqxmd.com/read/28814282/alterations-in-resting-state-functional-connectivity-of-the-default-mode-network-in-amnestic-mild-cognitive-impairment-an-fmri-study
#17
Moyi Li, Guohua Zheng, Yuhui Zheng, Zhenyu Xiong, Rui Xia, Wenji Zhou, Qin Wang, Shengxiang Liang, Jing Tao, Lidian Chen
BACKGROUND: Amnestic mild cognitive impairment (aMCI) is characterized by cognitive functional decline, especially in memory. Resting-state functional magnetic resonance imaging (fMRI) has been widely used in neuroimaging studies that explore alterations between patients and normal individuals to elucidate the pathological mechanisms of different diseases. The current study was performed to investigate alterations in the functional connectivity of the default mode network (DMN) in aMCI patients compared to healthy elderly controls, as well as further define the association between neurological alterations and memory function...
August 16, 2017: BMC Medical Imaging
https://www.readbyqxmd.com/read/28812529/approaches-to-evaluate-lung-inflammation-in-translational-research
#18
David K Meyerholz, Jessica C Sieren, Amanda P Beck, Heather A Flaherty
Inflammation is a common feature in several types of lung disease and is a frequent end point to validate lung disease models, evaluate genetic or environmental impact on disease severity, or test the efficacy of new therapies. Questions relevant to a study should be defined during experimental design and techniques selected to specifically address these scientific queries. In this review, the authors focus primarily on the breadth of techniques to evaluate lung inflammation that have both clinical and preclinical applications...
January 1, 2017: Veterinary Pathology
https://www.readbyqxmd.com/read/28812157/augmented-reality-in-a-tumor-resection-model
#19
Pauline Chauvet, Toby Collins, Clement Debize, Lorraine Novais-Gameiro, Bruno Pereira, Adrien Bartoli, Michel Canis, Nicolas Bourdel
BACKGROUND: Augmented Reality (AR) guidance is a technology that allows a surgeon to see sub-surface structures, by overlaying pre-operative imaging data on a live laparoscopic video. Our objectives were to evaluate a state-of-the-art AR guidance system in a tumor surgical resection model, comparing the accuracy of the resection with and without the system. Our system has three phases. Phase 1: using the MRI images, the kidney's and pseudotumor's surfaces are segmented to construct a 3D model...
August 15, 2017: Surgical Endoscopy
https://www.readbyqxmd.com/read/28812148/local-recurrence-of-squamous-cell-carcinoma-of-the-head-and-neck-after-radio-chemo-therapy-diagnostic-performance-of-fdg-pet-mri-with-diffusion-weighted-sequences
#20
Minerva Becker, Arthur D Varoquaux, Christophe Combescure, Olivier Rager, Marc Pusztaszeri, Karim Burkhardt, Bénédicte M A Delattre, Pavel Dulguerov, Nicolas Dulguerov, Eirini Katirtzidou, Francesca Caparrotti, Osman Ratib, Habib Zaidi, Christoph D Becker
PURPOSE: To determine the diagnostic performance of FDG-PET/MRI with diffusion-weighted imaging (FDG-PET/DWIMRI) for detection and local staging of head and neck squamous cell carcinoma (HNSCC) after radio(chemo)therapy. MATERIALS AND METHODS: This was a prospective study that included 74 consecutive patients with previous radio(chemo)therapy for HNSCC and in whom tumour recurrence or radiation-induced complications were suspected clinically. The patients underwent hybrid PET/MRI examinations with morphological MRI, DWI and FDG-PET...
August 15, 2017: European Radiology
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