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EJNMMI Research

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https://www.readbyqxmd.com/read/28523582/first-in-human-radiation-dosimetry-of-68-ga-nodaga-rgdyk
#1
Silvano Gnesin, Periklis Mitsakis, Francesco Cicone, Emmanuel Deshayes, Vincent Dunet, Augusto F Gallino, Marek Kosinski, Sébastien Baechler, Franz Buchegger, David Viertl, John O Prior
BACKGROUND: Integrin-targeting radiopharmaceuticals have potential broad applications, spanning from cancer theranostics to cardiovascular diseases. We have previously reported preclinical dosimetry results of (68)Ga-NODAGA-RGDyK in mice. This study presents the first human dosimetry of (68)Ga-NODAGA-RGDyK in the five consecutive patients included in a clinical imaging protocol of carotid atherosclerotic plaques. Five male patients underwent whole-body time-of-flight (TOF) PET/CT scans 10, 60 and 120 min after tracer injection (200 MBq)...
December 2017: EJNMMI Research
https://www.readbyqxmd.com/read/28508284/repeatability-of-quantitative-parameters-of-18f-fluoride-pet-ct-and-biochemical-tumour-and-specific-bone-remodelling-markers-in-prostate-cancer-bone-metastases
#2
Cecilia Wassberg, Mark Lubberink, Jens Sörensen, Silvia Johansson
PURPOSE: 18F-fluoride PET/CT exhibits high sensitivity to delineate and measure the extent of bone metastatic disease in patients with prostate cancer. 18F-fluoride PET/CT could potentially replace traditional bone scintigraphy in clinical routine and trials. However, more studies are needed to assess repeatability and biological uptake variation. The aim of this study was to perform test-retest analysis of quantitative PET-derived parameters and blood/serum bone turnover markers at the same time point...
December 2017: EJNMMI Research
https://www.readbyqxmd.com/read/28485003/analysis-of-progress-and-challenges-for-various-patterns-of-c-met-targeted-molecular-imaging-a-systematic-review
#3
REVIEW
Zhaoguo Han, Yongyi Wu, Kai Wang, Yadi Xiao, Zhen Cheng, Xilin Sun, Baozhong Shen
BACKGROUND: Mesenchymal-epithelial transition factor also named c-MET is a receptor tyrosine kinase for the hepatocyte growth factor that plays a pivotal role in tumorigenesis. c-MET-targeted therapies have been tested in preclinical models and patients, with significant benefits for cancer treatment. In recent years, many studies have shown that the expression level and activation status of c-MET are closely correlated to c-MET-targeted therapy response and clinical prognosis, thus highlighting the importance of evaluating the c-MET status during and prior to targeted therapy...
December 2017: EJNMMI Research
https://www.readbyqxmd.com/read/28470406/targeting-mannose-receptor-expression-on-macrophages-in-atherosclerotic-plaques-of-apolipoprotein-e-knockout-mice-using-111-in-tilmanocept
#4
Zohreh Varasteh, Fabien Hyafil, Nadège Anizan, Devy Diallo, Rachida Aid-Launais, Sarajo Mohanta, Yuanfang Li, Miriam Braeuer, Katja Steiger, Jonathan Vigne, Zhengtao Qin, Stephan G Nekolla, Jean-Etienne Fabre, Yvonne Döring, Dominique Le Guludec, Andreas Habenicht, David R Vera, Markus Schwaiger
BACKGROUND: Atherosclerotic plaque phenotypes are classified based on the extent of macrophage infiltration into the lesions, and the presence of certain macrophage subsets might be a sign for plaque vulnerability. The mannose receptor (MR) is over-expressed in activated macrophages. Tilmanocept is a tracer that targets MR and is approved in Europe and the USA for the detection of sentinel lymph nodes. In this study, our aim was to evaluate the potential of (111)In-labelled tilmanocept for the detection of MR-positive macrophages in atherosclerotic plaques of apolipoprotein E-knockout (ApoE-KO) mouse model...
December 2017: EJNMMI Research
https://www.readbyqxmd.com/read/28455733/carotid-atherosclerotic-plaques-standardised-uptake-values-software-challenges-and-reproducibility
#5
Nicola Giannotti, Martin J O'Connell, Shane J Foley, Peter J Kelly, Jonathan P McNulty
BACKGROUND: Positron emission tomography-computed tomography (PET-CT) carotid standardised uptake values (SUV) of (18)F-fluorodeoxyglucose ((18)FDG) have been proposed as an inflammatory biomarker for determining cerebrovascular diseases such as stroke. Consideration of varying methodological approaches and software packages is critical to the calculation of accurate SUVs in cross-sectional and longitudinal patient studies. The aim of this study was to investigate whether or not carotid atherosclerotic plaque SUVs are consistent and reproducible between software packages...
December 2017: EJNMMI Research
https://www.readbyqxmd.com/read/28439844/therapeutic-efficacy-of-%C3%AE-radioimmunotherapy-with-different-activity-levels-of-the-213-bi-labeled-monoclonal-antibody-mx35-in-an-ovarian-cancer-model
#6
Anna Gustafsson-Lutz, Tom Bäck, Emma Aneheim, Ragnar Hultborn, Stig Palm, Lars Jacobsson, Alfred Morgenstern, Frank Bruchertseifer, Per Albertsson, Sture Lindegren
BACKGROUND: The aim of this study was to compare the therapeutic efficacy of two different activity levels of the (213)Bi-labeled monoclonal antibody MX35 in an ovarian cancer model. Sixty female BALB/c (nu/nu) mice were inoculated intraperitoneally with human ovarian cancer cells (OVCAR-3). Two weeks later, 40 mice were injected intraperitoneal (i.p.) with 1 ml of (213)Bi-MX35, 3 MBq/mL (n = 20), or 9 MBq/mL (n = 20). An additional 20 mice received unlabeled MX35. Incidence of tumors and ascites was investigated 8 weeks after therapy...
December 2017: EJNMMI Research
https://www.readbyqxmd.com/read/28439843/effective-dose-estimation-for-oncological-and-neurological-pet-ct-procedures
#7
Josep M Martí-Climent, Elena Prieto, Verónica Morán, Lidia Sancho, Macarena Rodríguez-Fraile, Javier Arbizu, María J García-Velloso, José A Richter
BACKGROUND: The aim of this study was to retrospectively evaluate the patient effective dose (ED) for different PET/CT procedures performed with a variety of PET radiopharmaceutical compounds. PET/CT studies of 210 patients were reviewed including Torso (n = 123), Whole body (WB) (n = 36), Head and Neck Tumor (HNT) (n = 10), and Brain (n = 41) protocols with (18)FDG (n = 170), (11)C-CHOL (n = 10), (18)FDOPA (n = 10), (11)C-MET (n = 10), and (18)F-florbetapir (n = 10)...
December 2017: EJNMMI Research
https://www.readbyqxmd.com/read/28432674/partial-volume-correction-of-brain-pet-studies-using-iterative-deconvolution-in-combination-with-hypr-denoising
#8
Sandeep S V Golla, Mark Lubberink, Bart N M van Berckel, Adriaan A Lammertsma, Ronald Boellaard
BACKGROUND: Accurate quantification of PET studies depends on the spatial resolution of the PET data. The commonly limited PET resolution results in partial volume effects (PVE). Iterative deconvolution methods (IDM) have been proposed as a means to correct for PVE. IDM improves spatial resolution of PET studies without the need for structural information (e.g. MR scans). On the other hand, deconvolution also increases noise, which results in lower signal-to-noise ratios (SNR). The aim of this study was to implement IDM in combination with HighlY constrained back-PRojection (HYPR) denoising to mitigate poor SNR properties of conventional IDM...
December 2017: EJNMMI Research
https://www.readbyqxmd.com/read/28429332/the-effect-of-post-injection-18-f-fdg-pet-scanning-time-on-texture-analysis-of-peripheral-nerve-sheath-tumours-in-neurofibromatosis-1
#9
Eitan Lovat, Musib Siddique, Vicky Goh, Rosalie E Ferner, Gary J R Cook, Victoria S Warbey
BACKGROUND: Texture features are being increasingly evaluated in (18)F-fluorodeoxyglucose positron emission tomography ((18)F-FDG PET) as adjunctive imaging biomarkers in a number of different cancers. Whilst studies have reported repeatability between scans, there have been no studies that have specifically investigated the effect that the time of acquisition post-injection of (18)F-FDG has on texture features. The aim of this study was to investigate if texture features change between scans performed at different time points post-injection...
December 2017: EJNMMI Research
https://www.readbyqxmd.com/read/28405927/characterization-of-indeterminate-renal-masses-with-molecular-imaging-how-do-we-turn-potential-into-reality
#10
Steven P Rowe, Mehrbod S Javadi, Mohamad E Allaf, Michael A Gorin
No abstract text is available yet for this article.
December 2017: EJNMMI Research
https://www.readbyqxmd.com/read/28389883/high-throughput-high-volume-nuclear-imaging-for-preclinical-in-vivo-compound-screening-%C3%A2
#11
Sven Macholl, Ciara M Finucane, Jacob Hesterman, Stephen J Mather, Rachel Pauplis, Deirdre Scully, Jane K Sosabowski, Erwan Jouannot
BACKGROUND: Preclinical single-photon emission computed tomography (SPECT)/CT imaging studies are hampered by low throughput, hence are found typically within small volume feasibility studies. Here, imaging and image analysis procedures are presented that allow profiling of a large volume of radiolabelled compounds within a reasonably short total study time. Particular emphasis was put on quality control (QC) and on fast and unbiased image analysis. METHODS: 2-3 His-tagged proteins were simultaneously radiolabelled by (99m)Tc-tricarbonyl methodology and injected intravenously (20 nmol/kg; 100 MBq; n = 3) into patient-derived xenograft (PDX) mouse models...
December 2017: EJNMMI Research
https://www.readbyqxmd.com/read/28378292/tracking-dendritic-cell-migration-into-lymph-nodes-by-using-a-novel-pet-probe-18-f-tetrafluoroborate-for-sodium-iodide-symporter
#12
Sang Bong Lee, Ho Won Lee, Hongje Lee, Yong Hyun Jeon, Sang-Woo Lee, Byeong-Cheol Ahn, Jaetae Lee, Shin Young Jeong
BACKGROUND: Recently, (18)F-tetrafluoroborate (TFB) was used as a substrate for the human sodium/iodide symporter (hNIS) reporter gene. This study evaluated the feasibility of performing molecular-genetic imaging by using the new radiotracer ((18)F-TFB) for the hNIS gene, to track dendritic cell (DC) migration in live mice. A murine dendritic cell line (DC2.4) co-expressing the hNIS and effluc genes (DC/NF) was established. To confirm the functional cellular expression of both effluc and NIS in the inoculated DC/NF cells by bio-medical imaging, combined bioluminescence imaging (BLI) and (18)F-TFB positron emission tomography/computed tomography (PET/CT) imaging was performed after intramuscular injection with parental DCs and DC/NF cells...
December 2017: EJNMMI Research
https://www.readbyqxmd.com/read/28374288/design-synthesis-and-evaluation-in-an-lps-rodent-model-of-neuroinflammation-of-a-novel-18-f-labelled-pet-tracer-targeting-p2x7
#13
Enrico Raffaele Fantoni, Diego Dal Ben, Simonetta Falzoni, Francesco Di Virgilio, Simon Lovestone, Antony Gee
BACKGROUND: The P2X7 receptor has been shown to play a fundamental role in the initiation and sustenance of the inflammatory cascade. The development of a novel fluorine-18 PET tracer superior and with a longer half-life to those currently available is a promising step towards harnessing the therapeutic and diagnostic potential offered by this target. Inspired by the known antagonist A-804598, the present study outlines the design via molecular docking, synthesis and biological evaluation of the novel P2X7 tracer [(18)F]EFB...
December 2017: EJNMMI Research
https://www.readbyqxmd.com/read/28361349/impact-of-the-earl-harmonization-program-on-automatic-delineation-of-metabolic-active-tumour-volumes-matvs
#14
Charline Lasnon, Blandine Enilorac, Hosni Popotte, Nicolas Aide
BACKGROUND: The clinical validation of the EARL harmonization program for standardised uptake value (SUV) metrics is well documented; however, its potential for defining metabolic active tumour volume (MATV) has not yet been investigated. We aimed to compare delineation of MATV on images reconstructed using conventional ordered subset expectation maximisation (OSEM) with those reconstructed using point spread function modelling (PSF-reconstructed images), and either optimised for diagnostic potential (PSF) or filtered to meet the EANM/EARL harmonising standards (PSF7)...
December 2017: EJNMMI Research
https://www.readbyqxmd.com/read/28357787/visual-evaluation-and-differentiation-of-renal-oncocytomas-from-renal-cell-carcinomas-by-means-of-99m-tc-sestamibi-spect-ct
#15
Antonios Tzortzakakis, Ove Gustafsson, Mattias Karlsson, Linnea Ekström-Ehn, Rammin Ghaffarpour, Rimma Axelsson
BACKGROUND: Despite the progress in the quality of multiphasic CT and MRI scans, it is still difficult to fully characterize a solid kidney lesion. Approximately 10% of all solid renal tumours turn out to be oncocytomas. In actual clinical practice, this is verified only following unnecessary surgery or a renal biopsy/ablation. The objective of our pilot study examines whether (99m)Tc-sestamibi SPECT/CT can play a crucial role in the characterization of solid renal neoplasms and the differentiation of oncocytomas from renal cell carcinomas...
December 2017: EJNMMI Research
https://www.readbyqxmd.com/read/28337725/comparison-of-diagnostic-performance-of-four-software-packages-for-phase-dyssynchrony-analysis-in-gated-myocardial-perfusion-spect
#16
Koichi Okuda, Kenichi Nakajima, Shinro Matsuo, Soichiro Kashiwaya, Hiroto Yoneyama, Takayuki Shibutani, Masahisa Onoguchi, Mitsumasa Hashimoto, Seigo Kinuya
BACKGROUND: Phase analysis of gated myocardial perfusion single-photon emission computed tomography (SPECT) for assessment of left ventricular (LV) dyssynchrony was investigated using the following dedicated software packages: Corridor4DM (4DM), cardioREPO (cREPO), Emory Cardiac Toolbox (ECTb), and quantitative gated SPECT (QGS). The purpose of this study was to evaluate the normal values of 95% histogram bandwidth, phase standard deviation (SD), and entropy and to compare the diagnostic performance of the four software packages...
December 2017: EJNMMI Research
https://www.readbyqxmd.com/read/28337724/i-123-iomazenil-single-photon-emission-computed-tomography-for-detecting-loss-of-neuronal-integrity-in-patients-with-traumatic-brain-injury
#17
Kagari Abiko, Katsunori Ikoma, Tohru Shiga, Chietsugu Katoh, Kenji Hirata, Yuji Kuge, Kentaro Kobayashi, Nagara Tamaki
BACKGROUND: Traumatic brain injury (TBI) causes brain dysfunction in many patients. Using C-11 flumazenil (FMZ) positron emission tomography (PET), we have detected and reported the loss of neuronal integrity, leading to brain dysfunction in TBI patients. Similarly to FMZ PET, I-123 iomazenil (IMZ) single photon emission computed tomography (SPECT) is widely used to determine the distribution of the benzodiazepine receptor (BZR) in the brain cortex. The purpose of this study is to examine whether IMZ SPECT is as useful as FMZ PET for evaluating the loss of neuronal integrity in TBI patients...
December 2017: EJNMMI Research
https://www.readbyqxmd.com/read/28337723/assessment-of-safety-efficacy-and-dosimetry-of-a-novel-18-kda-translocator-protein-ligand-11-c-cb184-in-healthy-human-volunteers
#18
Muneyuki Sakata, Kenji Ishibashi, Masamichi Imai, Kei Wagatsuma, Kenji Ishii, Kentaro Hatano, Kiichi Ishiwata, Jun Toyohara
BACKGROUND: N,N-di-n-propyl-2-[2-(4-[(11)C]methoxyphenyl)-6,8-dichloroimidazol[1,2-a]pyridine-3-yl]acetamide ([(11)C]CB184) is a novel selective radioligand for the 18-kD translocator protein (TSPO), which is upregulated in activated microglia in the brain, and may be useful in positron emission tomography (PET). We examined the safety, radiation dosimetry, and initial brain imaging with [(11)C]CB184 in healthy human volunteers. RESULTS: Dynamic [(11)C]CB184 PET scans (90 min) were performed in five healthy male subjects...
December 2017: EJNMMI Research
https://www.readbyqxmd.com/read/28324341/beta-amyloid-deposition-in-patients-with-major-depressive-disorder-with-differing-levels-of-treatment-resistance-a-pilot-study
#19
Peng Li, Ing-Tsung Hsiao, Chia-Yih Liu, Chia-Hsiang Chen, She-Yao Huang, Tzu-Chen Yen, Kuan-Yi Wu, Kun-Ju Lin
BACKGROUND: Lack of treatment response in patients with late-life depression is common. The role of brain beta-amyloid (Aβ) deposition in treatment outcome in subjects with late-life depression remains unclear. The present study aimed to investigate brain Aβ deposition in patients with major depressive disorder (MDD) with differing treatment outcomes in vivo using (18)F-florbetapir imaging. This study included 62 MDD patients and 18 healthy control subjects (HCs).We first employed the Maudsley staging method (MSM) to categorize MDD patients into two groups according to treatment response: mild treatment resistance (n = 29) and moderate-to-severe treatment resistance (n = 33)...
December 2017: EJNMMI Research
https://www.readbyqxmd.com/read/28324340/quantitative-18-f-fluorocholine-positron-emission-tomography-for-prostate-cancer-correlation-between-kinetic-parameters-and-gleason-scoring
#20
Joshua J D Schaefferkoetter, Ziting Wang, Mary C Stephenson, Sharmili Roy, Maurizio Conti, Lars Eriksson, David W Townsend, Thomas Thamboo, Edmund Chiong
BACKGROUND: The use of radiolabeled choline as a positron emission tomography (PET) agent for imaging primary tumors in the prostate has been evaluated extensively over the past two decades. There are, however, conflicting reports of its sensitivity and the relationship between choline PET imaging and disease staging is not fully understood. Moreover, relatively few studies have investigated the correlation between tracer uptake and histological tumor grade. This work quantified (18)F-fluorocholine in tumor and healthy prostate tissue using pharmacokinetic modeling and stratified uptake parameters by histology grade...
December 2017: EJNMMI Research
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