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Nuclear imaging

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https://www.readbyqxmd.com/read/28430741/utility-of-8%C3%A2-h-and-time-decay-corrected-acquisition-scintigraphy-with-in-vitro-labeled-white-blood-cells-for-the-diagnosis-of-osteoarticular-infection
#1
Edel Noriega Álvarez, Guillermo A Martínez Pimienta, Ana M Benítez Segura, María T Bajén Lázaro, Alba Rodrígez-Gasén, Julio Rodríguez-Rubio Corona, Jaime Mora Salvadó
INTRODUCTION: Except in the spine, labeled white-blood cell scintigraphy (WBCS) with image acquisition up to 24 h is the nuclear medicine test of choice for diagnosing osteoarticular infection. However, distinguishing between inflammation and infection is a challenge. OBJECTIVES: The first aim of this study was to verify earlier research studies that used 4 and 24 h time decay-corrected acquisition (TDCA) to differentiate infection from inflammation. The second aim was to analyze whether 8 h acquisition (1-day protocol) yielded similar results as 20-24 h acquisition...
April 20, 2017: Nuclear Medicine Communications
https://www.readbyqxmd.com/read/28430557/utilization-management-of-high-cost-imaging-in-an-outpatient-setting-in-a-large-stable-patient-and-provider-cohort-over-7-years
#2
Jeffrey B Weilburg, Christopher L Sistrom, Daniel I Rosenthal, Markus B Stout, Keith J Dreyer, Helaine R Rockett, Jason M Baron, Timothy G Ferris, James H Thrall
Purpose To quantify the effect of a comprehensive, long-term, provider-led utilization management (UM) program on high-cost imaging (computed tomography, magnetic resonance imaging, nuclear imaging, and positron emission tomography) performed on an outpatient basis. Materials and Methods This retrospective, 7-year cohort study included all patients regularly seen by primary care physicians (PCPs) at an urban academic medical center. The main outcome was the number of outpatient high-cost imaging examinations per patient per year ordered by the patient's PCP or by any specialist...
April 21, 2017: Radiology
https://www.readbyqxmd.com/read/28430133/nuclear-molecular-imaging-strategies-in-immune-checkpoint-inhibitor-therapy
#3
REVIEW
Kasper F Guldbrandsen, Helle W Hendel, Seppo W Langer, Barbara M Fischer
Immune checkpoint inhibitor therapy (ICT) is a new treatment strategy developed for the treatment of cancer. ICT inhibits pathways known to downregulate the innate immune response to cancer cells. These drugs have been shown to be effective in the treatment of a variety of cancers, including metastatic melanoma and lung cancer. Challenges in response evaluation of patients in ICT have risen as immune related side effects and immune cell infiltration may be confused with progressive disease. Furthermore, the timing of the evaluation scan may be challenged by relatively slow responses...
April 21, 2017: Diagnostics
https://www.readbyqxmd.com/read/28426843/understanding-the-risks-and-harms-of-management-of-incidental-thyroid-nodules-a-review
#4
Jenny K Hoang, Xuan V Nguyen
Importance: Incidental thyroid nodules are defined as nodules originally detected in a patient with no thyroid-related clinical symptoms, examination findings, or suspected thyroid disease. Medical imaging for diseases in the neck, chest, and spine is a common source of incidental thyroid nodules. They are easily detected but poorly characterized. The next step is to decide whether the incidental thyroid nodule should be further evaluated with ultrasonography. Observations: Indiscriminate workup of incidental thyroid nodules with ultrasonography is not cost-effective and is potentially harmful...
April 20, 2017: JAMA Otolaryngology—Head & Neck Surgery
https://www.readbyqxmd.com/read/28426630/outer-nuclear-layer-thinning-in-pachychoroid-pigment-epitheliopathy
#5
M Giray Ersoz, Murat Karacorlu, Serra Arf, Mumin Hocaoglu, Isil Sayman Muslubas
PURPOSE: To compare the average thicknesses of central inner retinal layers in eyes with pachychoroid pigment epitheliopathy (PPE), with uncomplicated pachychoroid (UCP), and of healthy subjects. METHODS: Medical records of patients with PPE and UCP were retrospectively reviewed. Twenty-nine eyes with foveal PPE, 30 eyes with UCP, and 29 eyes of healthy subjects were included. Spectral-domain optical coherence tomography with enhanced depth imaging was used for all optical coherence tomography scans...
April 19, 2017: Retina
https://www.readbyqxmd.com/read/28426025/modular-low-light-microscope-for-imaging-cellular-bioluminescence-and-radioluminescence
#6
Tae Jin Kim, Silvan Türkcan, Guillem Pratx
Low-light microscopy methods are receiving increased attention as new applications have emerged. One such application is to allow longitudinal imaging of light-sensitive cells with no phototoxicity and no photobleaching of fluorescent biomarkers. Another application is for imaging signals that are inherently dim and undetectable using standard microscopy techniques, such as bioluminescence, chemiluminescence or radioluminescence. In this protocol, we provide instructions on how to build a modular low-light microscope (1-4 d) by coupling two microscope objective lenses, back to back from each other, using standard optomechanical components...
May 2017: Nature Protocols
https://www.readbyqxmd.com/read/28425543/in-situ-nuclear-magnetic-resonance-microimaging-of-live-biofilms-in-a-microchannel
#7
R S Renslow, M J Marshall, A E Tucker, W B Chrisler, X-Y Yu
Biofilms are comprised of microbial cells and an extracellular polymeric substance (EPS) matrix that supports interactions between community members and with the local environment. The highly hydrated EPS matrix makes the application of many biofilm visualization techniques difficult. Hence, to better visualize how biofilms interact with their environment, there is a need for imaging techniques to monitor hydrated state biofilm dynamics. We employed an in situ dynamic approach to construct label-free images of biofilms...
April 20, 2017: Analyst
https://www.readbyqxmd.com/read/28421396/-11-c-methionine-pet-ct-findings-in-benign-brain-disease
#8
REVIEW
Reiko Nakajima, Ken Kimura, Koichiro Abe, Shuji Sakai
(11)C-methionine (MET) is one of the most commonly used positron emission tomography (PET) tracers for evaluation of malignant brain tumor, with MET-PET being a sensitive technique for visualization of primary and recurrent malignant brain tumors. However, previous reports have demonstrated MET uptake in lesions associated with benign brain diseases. These diseases usually show an increase in MET uptake similar to that of malignant tumors. This pitfall in MET-PET image interpretation is important not only for nuclear medicine professionals, but also for radiologists...
April 18, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28421181/mct1-in-invasive-ductal-carcinoma-monocarboxylate-metabolism-and-aggressive-breast-cancer
#9
Jennifer M Johnson, Paolo Cotzia, Roberto Fratamico, Lekha Mikkilineni, Jason Chen, Daniele Colombo, Mehri Mollaee, Diana Whitaker-Menezes, Marina Domingo-Vidal, Zhao Lin, Tingting Zhan, Madalina Tuluc, Juan Palazzo, Ruth C Birbe, Ubaldo E Martinez-Outschoorn
Introduction: Monocarboxylate transporter 1 (MCT1) is an importer of monocarboxylates such as lactate and pyruvate and a marker of mitochondrial metabolism. MCT1 is highly expressed in a subgroup of cancer cells to allow for catabolite uptake from the tumor microenvironment to support mitochondrial metabolism. We studied the protein expression of MCT1 in a broad group of breast invasive ductal carcinoma specimens to determine its association with breast cancer subtypes and outcomes. Methods: MCT1 expression was evaluated by immunohistochemistry on tissue micro-arrays (TMA) obtained through our tumor bank...
2017: Frontiers in Cell and Developmental Biology
https://www.readbyqxmd.com/read/28420980/loss-of-melanopsin-expressing-ganglion-cell-subtypes-and-dendritic-degeneration-in-the-aging-human-retina
#10
Gema Esquiva, Pedro Lax, Juan J Pérez-Santonja, José M García-Fernández, Nicolás Cuenca
In mammals, melanopsin-expressing retinal ganglion cells (mRGCs) are, among other things, involved in several non-image-forming visual functions, including light entrainment of circadian rhythms. Considering the profound impact of aging on visual function and ophthalmic diseases, here we evaluate changes in mRGCs throughout the life span in humans. In 24 post-mortem retinas from anonymous human donors aged 10-81 years, we assessed the distribution, number and morphology of mRGCs by immunostaining vertical retinal sections and whole-mount retinas with antibodies against melanopsin...
2017: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/28419396/correlation-between-mesopic-retinal-sensitivity-and-optical-coherence-tomographic-metrics-of-the-outer-retina-in-patients-with-non-atrophic-dry-age-related-macular-degeneration
#11
Tudor C Tepelus, Amir H Hariri, Mayss Al-Sheikh, SriniVas R Sadda
BACKGROUND AND OBJECTIVE: To determine the correlation between mesopic retinal sensitivity and optical coherence tomographic metrics of the outer retina in patients with intermediate age-related macular degeneration (AMD). PATIENTS AND METHODS: Participants with nonatrophic dry AMD underwent mesopic MP-3 microperimetry (Nidek, Padova, Italy) and both Nidek and Cirrus (Carl Zeiss Meditec, Dublin, CA) spectral-domain optical coherence tomography (SD-OCT). The volume of the outer retinal layers was measured on the Nidek SD-OCT scans using the automatic segmentation algorithm of Navis-EX software...
April 1, 2017: Ophthalmic Surgery, Lasers & Imaging Retina
https://www.readbyqxmd.com/read/28418353/-a-change-in-the-expression-of-membrane-associated-proteins-and-cytoplasmic-actin-isoforms-in-the-progression-of-human-colon-tumors
#12
M V Novikova, V A Rybko, A V Kochatkov, N V Khromova, S Yu Bogomazova, V B Dugina, V K Lyadov, P B Kopnin
Tumor progression is a complex process that also involves the restructuring of the actin cytoskeleton and the weakening of intercellular adhesive contacts due to the tumor cells that pass through the epithelial-mesenchymal transition (EMT). AIM: Тo identify correlations between clinical features, risk of progression and/or recurrence of human colon adenocarcinomas (CAC), and EMT-related tumor markers. MATERIAL AND METHODS: Descending colon and sigmoid colon adenocarcinoma samples were examined immunohistochemically...
2017: Arkhiv Patologii
https://www.readbyqxmd.com/read/28418019/live-imaging-of-h3k9-acetylation-in-plant-cells
#13
Kazuki Kurita, Takuya Sakamoto, Noriyoshi Yagi, Yuki Sakamoto, Akihiro Ito, Norikazu Nishino, Kaori Sako, Minoru Yoshida, Hiroshi Kimura, Motoaki Seki, Sachihiro Matsunaga
Proper regulation of histone acetylation is important in development and cellular responses to environmental stimuli. However, the dynamics of histone acetylation at the single-cell level remains poorly understood. Here we established a transgenic plant cell line to track histone H3 lysine 9 acetylation (H3K9ac) with a modification-specific intracellular antibody (mintbody). The H3K9ac-specific mintbody fused to the enhanced green fluorescent protein (H3K9ac-mintbody-GFP) was introduced into tobacco BY-2 cells...
April 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28417857/nuclear-medicine-imaging-in-pediatric-infection-or-chronic-inflammatory-diseases
#14
REVIEW
Alberto Signore, Andor W J M Glaudemans, Olivier Gheysens, Chiara Lauri, Onofrio A Catalano
In this review article, we focus on the most recent applications of nuclear medicine techniques (mainly (99m)Tc/(111)In white blood cells (WBC) scan, [(18)F]-FDG-PET/CT, [(18)F]-FDG-PET/MRI, and (99m)Tc-IL-2 scintigraphy) in the study of children affected by peripheral bone osteomyelitis, fungal infections, inflammatory bowel diseases, and type 1 diabetes, owing to recent important published evidences of their role in the management of these diseases. For osteomyelitis in children, both bone scintigraphy and [(18)F]-FDG-PET have a major advantage of assessing the whole body in one imaging session to confirm or exclude multifocal involvement, whereas WBC scan has a limited role...
May 2017: Seminars in Nuclear Medicine
https://www.readbyqxmd.com/read/28417852/nuclear-medicine-in-pediatric-nephro-urology-an-overview
#15
REVIEW
Iosif Mendichovszky, Bernardita Troncoso Solar, Naima Smeulders, Marina Easty, Lorenzo Biassoni
In the context of ante-natally diagnosed hydronephrosis, the vast majority of children with a dilated renal pelvis do not need any surgical treatment, as the dilatation resolves spontaneously with time. Slow drainage demonstrated at Tc-99m-mercaptoacetyltriglycine (MAG3) renography does not necessarily mean obstruction. Obstruction is defined as resistance to urinary outflow with urinary stasis at the level of the pelvic-ureteric junction (PUJ) which, if left untreated, will damage the kidney. Unfortunately this definition is retrospective and not clinically helpful...
May 2017: Seminars in Nuclear Medicine
https://www.readbyqxmd.com/read/28417851/nuclear-medicine-techniques-in-pediatric-bone-imaging
#16
REVIEW
Laura A Drubach
An important mandate when imaging pediatric patients is the reduction of radiation exposure to the lowest possible level consistent with good quality diagnostic imaging, so individual selection of radiopharmaceutical dosage and imaging technique is essential. Although the logistics of image acquisition and the approach to interpretation mirror the more common use in adults, the challenges of imaging young children typically require greater attention to patient preparation, positioning, and supervision during imaging, with the use of parental or family engagement in the procedure, gentle restraint, and occasionally the need for sedation...
May 2017: Seminars in Nuclear Medicine
https://www.readbyqxmd.com/read/28416576/pathways-involved-in-formation-of-mammary-organoid-architecture-have-keys-to-understanding-drug-resistance-and-to-discovery-of-druggable-targets
#17
Saori Furuta, Mina J Bissell
Signals from the extracellular matrix (ECM) are received at the cell surface receptor, transmitted to the cytoskeletons, and transferred to the nucleus and chromatin for tissue- and context-specific gene expression. Cells, in return, modulate the cell shape and ECM, allowing for the maintenance of tissue homeostasis as well as for coevolution and adaptation to the environmental signals. We postulated the existence of dynamic and reciprocal interactions between the ECM and the nucleus more than three decades ago, but now these pathways have been proven experimentally thanks to the advances in imaging and cell/molecular biology techniques...
April 17, 2017: Cold Spring Harbor Symposia on Quantitative Biology
https://www.readbyqxmd.com/read/28415473/preparation-of-a-novel-bioavailable-curcuminoid-formulation-cureit%C3%A2-using-polar-nonpolar-sandwich-pns-technology-and-its-characterization-and-applications
#18
Augustine Amalraj, Shintu Jude, Karthik Varma, Joby Jacob, Sreeraj Gopi, Oluwatobi S Oluwafemi, Sabu Thomas
Health benefits of curcuminoid are highly limited due to their poor aqueous solubility, very low systemic bioavailability, fast metabolic alterations and rapid elimination. In this study, a novel bioavailable curcuminoid formulation Cureit™ was prepared by using Polar-Nonpolar-Sandwich (PNS) technology with complete natural turmeric matrix (CNTM). The synthesized bioavailable curcuminoid formulation Cureit™ was characterizations by Nuclear magnetic resonance spectroscopy (NMR), scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infra-red (IR), current-voltage (I-V) study, Quadrupole Time-of-Flight Mass Spectrometry (Q-TOF), differential scanning calorimeter (DSC) and thermogravimetric analysis (TGA)...
June 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28414669/a-case-of-hepatosplentic-t-cell-lymphoma-a-rare-aggressive-tumor-of-the-young
#19
S Cingam, S Patel, N Koshy
INTRODUCTION: Hepatosplenic T-cell lymphoma (HSTCL); is an unusual entity first described in 1990 that predominantly affects middle-aged men and is classified by WHO under peripheral T-cell lymphomas. We present a 26-year-old man with HSCTL treated with a non-CHOP regimen. CASE: A 26 year old immigrant from Cameroon without significant past medical history presented with abdominal discomfort that was first noted 1 month prior at which time he was elbowed in abdomen during a basketball game...
March 2017: Journal of the Louisiana State Medical Society: Official Organ of the Louisiana State Medical Society
https://www.readbyqxmd.com/read/28413203/nuclear-morphometry-and-texture-analysis-on-cytological-smears-of-thyroid-neoplasms-a-study-of-50-cases
#20
L Deka, S Gupta, R Gupta, K Gupta, C J Kaur, S Singh S
BACKGROUND: Fine needle aspiration cytology (FNAC) is a reliable and reproducible diagnostic technique for thyroid lesions with certain limitations. Computed morphometric methods have been introduced with a view to improve the diagnostic yield of thyroid aspirates. However, a review of the existing literature revealed conflicting reports regarding morphometric parameters in thyroid neoplasms. MATERIALS AND METHODS: This study included 50 cases of thyroid lesions (20 cases of colloid goitre, 15 of follicular adenoma, 5 of follicular carcinoma and 10 papillary carcinomas)...
April 2017: Malaysian Journal of Pathology
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