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https://www.readbyqxmd.com/read/28227331/assessing-the-development-of-fetal-myocardial-function-by-a-novel-doppler-myocardial-performance-index
#1
Ahsan H Khandoker, F Marzbanrad, Y Kimura, Saeed Al Nuaimi, M Palaniswami, Ahsan H Khandoker, F Marzbanrad, Y Kimura, Saeed Al Nuaimi, M Palaniswami, Ahsan H Khandoker, Y Kimura, Saeed Al Nuaimi, F Marzbanrad, M Palaniswami
Doppler-derived myocardial performance index are used to assess aspects of systolic and diastolic function in adult as well as fetal heart. The Tei Index (TI) is a useful and non-invasive tool. The aim of this study was to determine normal values of fetal left ventricular (LV) TI in early (16-32 weeks) and late trimester (35-41 weeks) fetuses and to develop a new myocardial performance index (K-index; KI) which focuses on fetal diastolic interval when oxygenated blood from the placenta filled in the LV. Simultaneous recordings of Doppler Ultrasound Signal (DUS) of the LV outflow tracts and fetal electrocardiogram signals were obtained in 55 early- and late-trimester fetuses...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28225569/hepatic-alanine-differentiates-nonalcoholic-steatohepatitis-from-simple-steatosis-in-humans-and-mice-a-proton-mr-spectroscopy-study-with-long-echo-time
#2
Tae-Hoon Kim, Hong Young Jun, Ki-Jong Kim, Young Hwan Lee, Myeung Su Lee, Keum Ha Choi, Ki Jung Yun, Yong Yeon Jeong, Chung Hwan Jun, Eun Young Cho, Kwon-Ha Yoon
PURPOSE: To evaluate the hepatic metabolic alterations in nonalcoholic fatty liver disease (NAFLD) by using (1) H-MRS (proton magnetic resonance spectroscopy) with long echo time and to test the reproducibility of human study in an animal model. Liver biopsy is the gold standard for diagnosing NAFLD but with practical constraints. (1) H-MRS allows in vivo assessment of hepatocellular metabolism and has shown potential for biochemical differentiation in diffuse liver disease. MATERIALS AND METHODS: In all, 32 subjects (11 patients with nonalcoholic steatohepatitis [NASH], 15 with simple steatosis [SS], and six healthy controls) were studied...
February 22, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28221194/multiple-time-point-68-ga-psma-i-t-pet-ct-for-characterization-of-primary-prostate-cancer-value-of-early-dynamic-and-delayed-imaging
#3
Sebastian Schmuck, Martin Mamach, Florian Wilke, Christoph A von Klot, Christoph Henkenberens, James T Thackeray, Jan M Sohns, Lilli Geworski, Tobias L Ross, Hans-Juergen Wester, Hans Christiansen, Frank M Bengel, Thorsten Derlin
PURPOSE: The aims of this study were to gain mechanistic insights into prostate cancer biology using dynamic imaging and to evaluate the usefulness of multiple time-point Ga-prostate-specific membrane antigen (PSMA) I&T PET/CT for the assessment of primary prostate cancer before prostatectomy. METHODS: Twenty patients with prostate cancer underwent Ga-PSMA I&T PET/CT before prostatectomy. The PET protocol consisted of early dynamic pelvic imaging, followed by static scans at 60 and 180 minutes postinjection (p...
February 17, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28217962/synthesis-and-pharmacological-evaluation-of-identified-and-putative-metabolites-of-the-a1-adenosine-receptor-antagonist-cyclopentyl-3-3-fluoropropyl-1-propylxanthine-cpfpx
#4
Marcus Holschbach, Dirk Bier, Wiebke Sihver, Annette Schulze, Bernd Neumaier
The A1 adenosine receptor (A1AR) antagonist [18F]cyclopentyl-3-(3-fluoropropyl)-1-propylxanthine ([18F]CPFPX), used in imaging human brain A1ARs by PET, is stable in the brain but rapidly undergoes transformation into one major (M1) and several minor metabolites in blood. This report describes the synthesis of putative metabolites of CPFPX as standards for the identification of those metabolites. Analysis by (radio)HPLC revealed that extracts of human liver microsomes incubated with n.c.a.[18F]CPFPX contained the major metabolite, M1, as well as radioactive metabolites corresponding to derivatives functionalized at the cyclopentyl moiety, but no N1-despropyl species or metabolites resulting from functionalizations of the N3-fluoropropyl chain...
February 20, 2017: ChemMedChem
https://www.readbyqxmd.com/read/28208733/a-survey-on-banknote-recognition-methods-by-various-sensors
#5
REVIEW
Ji Woo Lee, Hyung Gil Hong, Ki Wan Kim, Kang Ryoung Park
Despite a decrease in the use of currency due to the recent growth in the use of electronic financial transactions, real money transactions remain very important in the global market. While performing transactions with real money, touching and counting notes by hand, is still a common practice in daily life, various types of automated machines, such as ATMs and banknote counters, are essential for large-scale and safe transactions. This paper presents studies that have been conducted in four major areas of research (banknote recognition, counterfeit banknote detection, serial number recognition, and fitness classification) in the accurate banknote recognition field by various sensors in such automated machines, and describes the advantages and drawbacks of the methods presented in those studies...
February 8, 2017: Sensors
https://www.readbyqxmd.com/read/28208155/pet-mr-in-invasive-ductal-breast-cancer-correlation-between-imaging-markers-and-histological-phenotype
#6
Onofrio Antonio Catalano, Gary Lloyd Horn, Alberto Signore, Carlo Iannace, Maria Lepore, Mark Vangel, Angelo Luongo, Marco Catalano, Constance Lehman, Marco Salvatore, Andrea Soricelli, Ciprian Catana, Umar Mahmood, Bruce Robert Rosen
BACKGROUND: Differences in genetics and receptor expression (phenotypes) of invasive ductal breast cancer (IDC) impact on prognosis and treatment response. Immunohistochemistry (IHC), the most used technique for IDC phenotyping, has some limitations including its invasiveness. We explored the possibility of contrast-enhanced positron emission tomography magnetic resonance (CE-FDG PET/MR) to discriminate IDC phenotypes. METHODS: 21 IDC patients with IHC assessment of oestrogen receptor (ER), progesterone receptor (PR), human epidermal growth factor-2 (HER2), and antigen Ki-67 (Ki67) underwent CE-FDG PET/MR...
February 16, 2017: British Journal of Cancer
https://www.readbyqxmd.com/read/28198659/intra-and-inter-rater-reliabilities-of-measurement-of-ultrasound-imaging-for-muscle-thickness-and-pennation-angle-of-tibialis-anterior-muscle-in-stroke-patients
#7
Ki Hun Cho, Hwang Jae Lee, Wan Hee Lee
BACKGROUND: Dysfunction of skeletal muscle has been commonly reported in stroke patients. OBJECTIVE: The purpose of this study was to investigate the intra- and inter-rater reliabilities of measurement of ultrasound imaging (USI) for pennation angle (PA) and muscle thickness (MT) of tibialis anterior muscle in stroke patients. METHODS: Thirty-four stroke patients (19 men) participated in this study. USI was used for measurement of PA and MT of the tibialis anterior muscles at rest and during maximum voluntary contraction (MVC)...
February 15, 2017: Topics in Stroke Rehabilitation
https://www.readbyqxmd.com/read/28193205/comparison-of-immunohistochemistry-with-pcr-for-assessment-of-er-pr-and-ki-67-and-prediction-of-pathological-complete-response-in-breast-cancer
#8
Hans-Peter Sinn, Andreas Schneeweiss, Marius Keller, Kornelia Schlombs, Mark Laible, Julia Seitz, Sotirios Lakis, Elke Veltrup, Peter Altevogt, Sebastian Eidt, Ralph M Wirtz, Frederik Marmé
BACKGROUND: Proliferation may predict response to neoadjuvant therapy of breast cancer and is commonly assessed by manual scoring of slides stained by immunohistochemistry (IHC) for Ki-67 similar to ER and PgR. This method carries significant intra- and inter-observer variability. Automatic scoring of Ki-67 with digital image analysis (qIHC) or assessment of MKI67 gene expression with RT-qPCR may improve diagnostic accuracy. METHODS: Ki-67 IHC visual assessment was compared to the IHC nuclear tool (AperioTM) on core biopsies from a randomized neoadjuvant clinical trial...
February 13, 2017: BMC Cancer
https://www.readbyqxmd.com/read/28191877/a-virtual-clinical-trial-comparing-static-versus-dynamic-pet-imaging-in-measuring-response-to-breast-cancer-therapy
#9
Kristen A Wangerin, Mark Muzi, Lanell Peterson, Hannah Linden, Alena Novakova, David Mankoff, Paul Kinahan
OBJECTIVE: We developed a method to evaluate variations in the PET imaging process in order to characterize the relative ability of static and dynamic metrics to measure breast cancer response to therapy in a clinical trial setting. METHODS: We performed a virtual clinical trial by generating 540 i.i.d. PET imaging study realizations for each of 22 original dynamic fluorodeoxyglucose (18F-FDG) breast cancer patient studies pre- and post-therapy. Each noise realization accounted for known sources of uncertainty in the imaging process, such as biological variability and SUV uptake time...
February 13, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28190604/the-fate-of-acute-lacunar-lesions-in-terms-of-shape-and-size
#10
Ki Jeong Lee, Hyeyoung Jung, Yoon-Sang Oh, Eun Ye Lim, A-Hyun Cho
BACKGROUND: The description of lacunar infarcts on imaging is widely variable. In particular, there are fewer agreements on lacunar lesion size and the presence of cavitation. In this regard, we investigated the changes in size and shape of acute ischemic lesion that is possibly considered as small vessel occlusion on long-term follow-up. METHODS: Patients with acute single subcortical ischemic lesion on penetrating arterial territories and without definite cause of cardioembolism and large vessel disease were included...
February 9, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/28187885/automated-characterization-and-counting-of-ki-67-protein-for-breast-cancer-prognosis-a-quantitative-immunohistochemistry-approach
#11
Tushar Mungle, Suman Tewary, Indu Arun, Bijan Basak, Sanjit Agarwal, Rosina Ahmed, Sanjoy Chatterjee, Asok Kumar Maity, Chandan Chakraborty
Ki-67 protein expression plays an important role in predicting the proliferative status of tumour cells and deciding the future course of therapy in breast cancer. Immunohistochemical (IHC) determination of Ki-67 score or labelling index, by estimating the fraction of Ki67 positively stained tumour cells, is the most widely practiced method to assess tumour proliferation (Dowsett et al. 2011). Accurate manual counting of these cells (specifically nuclei) due to complex and dense distribution of cells, therefore, becomes critical and presents a major challenge to pathologists...
February 2017: Computer Methods and Programs in Biomedicine
https://www.readbyqxmd.com/read/28185288/metformin-effects-on-head-and-neck-squamous-carcinoma-microenvironment-window-of-opportunity-trial
#12
Joseph Curry, Jennifer Johnson, Patrick Tassone, Marina Domingo Vidal, Diana Whitaker Menezes, John Sprandio, Mehri Mollaee, Paolo Cotzia, Ruth Birbe, Zhao Lin, Kurren Gill, Elizabeth Duddy, Tingting Zhan, Benjamin Leiby, Michelle Reyzer, David Cognetti, Adam Luginbuhl, Madalina Tuluc, Ubaldo Martinez-Outschoorn
OBJECTIVE: The tumor microenvironment frequently displays abnormal cellular metabolism, which contributes to aggressive behavior. Metformin inhibits mitochondrial oxidative phosphorylation, altering metabolism. Though the mechanism is unclear, epidemiologic studies show an association between metformin use and improved outcomes in head and neck squamous cell carcinoma (HNSCC). We sought to determine if metformin alters metabolism and apoptosis in HNSCC tumors. STUDY DESIGN: Window of opportunity trial of metformin between diagnostic biopsy and resection...
February 10, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28184351/spontaneous-absorption-of-cerebral-air-embolus-developed-accidentally-during-an-intra-arterial-procedure
#13
Tae Ki Yang
Cerebral arterial air embolism (CAAE), although infrequent, is a complication that can occur at any time during an invasive medical procedure. We experienced two cases of CAAE during cerebral angiography accidentally. The author reports the two cases of CAAE wherein air emboli dissolved spontaneously and immediately under normal atmospheric pressure, not under therapeutic hyperbaric environment. One of the cases shows entire dissolution of the air embolus on the moving image. This report shows that arterial air embolus can be absorbed spontaneously, and air embolus size is one of the factors that influence air embolus dissolution besides hyperbaric oxygen condition...
December 2016: Journal of Cerebrovascular and Endovascular Neurosurgery
https://www.readbyqxmd.com/read/28184274/cerebrospinal-fluid-infection-after-lumbar-nerve-root-steroid-injection-a-case-report
#14
Kwan-Sub Kim, Young-Ki Kim, Seong-Su Kim, Sung Min Shim, Hae Jun Cho
A 45-year-old woman was admitted due to severe headache and neck stiffness. She had visited a local clinic for back pain and received a lumbar nerve root steroid injection 10 days before admission. Computed tomography and magnetic resonance imaging showed psoas abscess, pneumocephalus, and subdural hygroma. She was diagnosed with psoas abscess and meningitis. The abscess and external ventricle were drained, and antibiotics were administered. Unfortunately, the patient died on hospital day 19 due to diffuse leptomeningitis...
February 2017: Korean Journal of Anesthesiology
https://www.readbyqxmd.com/read/28177647/comprehensive-assessment-of-ankle-syndesmosis-injury-using-3d-isotropic-turbo-spin-echo-sequences-diagnostic-performance-compared-with-that-of-conventional-and-oblique-3-t-mri
#15
Minchul Kim, Yun Sun Choi, Min Sun Jeong, Mira Park, Tong Jin Chun, Jin Su Kim, Ki Won Young
OBJECTIVE: The objective of this study is to evaluate the diagnostic performance of 3D sampling perfection with application-optimized contrasts using different flip angle evolution (SPACE) sequences in the evaluation of ankle syndesmosis injuries, compared with that of conventional orthogonal MRI and oblique proton density-weighted turbo spin-echo (TSE) sequences performed with 3-T MRI. MATERIALS AND METHODS: This retrospective study included 98 patients with suspected ankle syndesmosis injuries who underwent both MRI and surgery...
February 8, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28176499/ct-angiography-of-collateral-vessels-and-outcomes-in-endovascular-treated-acute-ischemic-stroke-patients
#16
Beom Joon Kim, Jong Won Chung, Hong Kyun Park, Jun Yup Kim, Mi Hwa Yang, Moon Ku Han, Cheolkyu Jeong, Gyojun Hwang, O Ki Kwon, Hee Joon Bae
BACKGROUND AND PURPOSE: Measuring the extent of the collateral blood vessels using computed tomography (CT) angiography source images may promote tissue survival and functional gain in acute ischemic stroke patients who are candidates for endovascular recanalization treatment. METHODS: Of 5,558 acute stroke patients registered in a prospective clinical stroke registry, 104 met the selection criteria of endovascular recanalization treatment for internal cerebral artery or middle cerebral artery main-stem (M1) occlusions and presented for treatment ≤4 hours after the event...
January 12, 2017: Journal of Clinical Neurology
https://www.readbyqxmd.com/read/28176243/the-extent-to-which-standardized-uptake-values-reflect-fdg-phosphorylation-in-the-liver-and-spleen-as-functions-of-time-after-injection-of-18-f-fluorodeoxyglucose
#17
Georgia Keramida, Constantinos D Anagnostopoulos, A Michael Peters
PURPOSE: In FDG PET/CT, standardized uptake value (SUV) is used to measure metabolic activity but detects un-phosphorylated FDG as well as phosphorylated FDG (FDG6P). Our aim was to determine the proportions of intrahepatic and intrasplenic FDG that are phosphorylated after FDG injection and compare them with SUVs. METHODS: Sixty patients undergoing whole-body PET/CT 60 min post-injection of FDG first had dynamic PET imaging for 30 min with measurement of hepatic and splenic FDG clearances using Patlak-Rutland analysis...
December 2017: EJNMMI Research
https://www.readbyqxmd.com/read/28174192/infarcted-myocardium-primed-dendritic-cells-improve-remodeling-and-cardiac-function-after-myocardial-infarction-by-modulating-the-treg-and-macrophage-polarization
#18
Eun Ho Choo, Jun-Ho Lee, Eun-Hye Park, Hyo Eun Park, Nam-Chul Jung, Tae-Hoon Kim, Yoon-Seok Koh, Eunmin Kim, Ki-Bae Seung, Cheongsoo Park, Kwan-Soo Hong, Kwonyoon Kang, Jie-Young Song, Han Geuk Seo, Dae-Seog Lim, Kiyuk Chang
BACKGROUND: -Inflammatory responses play a critical role in left ventricular (LV) remodeling after a myocardial infarction (MI). Tolerogenic dendritic cells (tDCs) can modulate immune responses inducing regulatory T cells (Tregs) in a number of inflammatory diseases. METHODS: -We generated tDCs by treating bone marrow-derived dendritic cells with TNF-α and cardiac lysate from MI mice. We injected MI mice, which were induced by a ligation of the left anterior descending coronary artery in C57BL/6 mice, twice with tDCs within 24 hours and at 7 days after the ligation...
February 7, 2017: Circulation
https://www.readbyqxmd.com/read/28168682/a-magnetic-resonance-image-guided-breast-needle-intervention-robot-system-overview-and-design-considerations
#19
Samuel Byeongjun Park, Jung-Gun Kim, Ki-Woong Lim, Chae-Hyun Yoon, Dong-Jun Kim, Han-Sung Kang, Yung-Ho Jo
PURPOSE: We developed an image-guided intervention robot system that can be operated in a magnetic resonance (MR) imaging gantry. The system incorporates a bendable needle intervention robot for breast cancer patients that overcomes the space limitations of the MR gantry. METHODS: Most breast coil designs for breast MR imaging have side openings to allow manual localization. However, for many intervention procedures, the patient must be removed from the gantry. A robotic manipulation system with integrated image guidance software was developed...
February 6, 2017: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/28168048/diagnostic-ability-of-retinal-nerve-fiber-layer-thickness-deviation-map-for-localized-and-diffuse-retinal-nerve-fiber-layer-defects
#20
Joong Won Shin, Mincheol Seong, Jung Wook Lee, Eun Hee Hong, Ki Bang Uhm
Purpose. To evaluate the diagnostic ability of the retinal nerve fiber layer (RNFL) deviation map for glaucoma with localized or diffuse RNFL defects. Methods. Eyes of 139 glaucoma patients and 165 healthy subjects were enrolled. All participants were imaged with Cirrus HD-OCT (Carl Zeiss Meditec, Dublin, CA, USA). A RNFL defect was defined as at least 10 contiguous red (<1% level) superpixels in RNFL deviation map. The area, location, and angular width of RNFL defects were automatically measured. We compared sensitivities, specificities, and area under the receiver operating characteristic curves (AUCs) of RNFL deviation map and circumpapillary RNFL thickness for localized and diffuse RNFL defects...
2017: Journal of Ophthalmology
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