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https://www.readbyqxmd.com/read/28454368/anti-osteoclastic-agent-denosumab-for-a-giant-cell-tumor-of-the-bone-with-concurrent-paget-s-disease-a-case-report
#1
Takaaki Tanaka, John Slavin, Sue-Anne McLachlan, Peter Choong
Paget's disease of the bone may predispose the development of malignant bone tumors such as osteosarcoma. Giant cell tumor (GCT) as a consequence of Paget's disease is rare. Bone GCT is characterized by rapid growth, the destruction of bone, extension to the surrounding soft tissue and abnormal bone turnover caused by an abnormality of the receptor activator of nuclear factor-κB (RANK)-RANK ligand (RANKL) pathway. Denosumab is a RANK-RANKL inhibitor, which is used to treat osteoporosis and bone GCT. In the current study, a 60-year-old male presented with severe pain located between the right thigh and the knee...
April 2017: Oncology Letters
https://www.readbyqxmd.com/read/28447966/the-prognostic-value-of-preoperative-pet-ct-evaluation-of-maximum-standardized-uptake-value-in-renal-cell-carcinomas
#2
Halil Komek, Serdar Altindag, Canan Can, Nursin Aguloglu, Hasan Morcali, Abidin Tuzun, Seyhmus Kavak
AIM: The use of positron emission tomography (PET/CT) in kidney tumors has increased greatly in recent years. There have been few studies on the effect of SUVmax values detected by PET/CT on the mortality and survival estimation in patients with kidney tumors. In this study, it is hoped to contribute to the literature of research on survival and mortality estimations of kidney tumour patients through an evaluation of SUVmax values measured with PET/CT scan. MATERIAL AND METHODS: A retrospective review was made of the files of 21 patients newly-diagnosed with kidney tumor and with disease staging determined with PET/CT in the Nuclear medicine Department of Saglik Bilimleri University Diyarbakir Gazi Yasargil Training and Research Hospital between August 2007 and April 2012...
2017: Annali Italiani di Chirurgia
https://www.readbyqxmd.com/read/28447112/-imaging-diagnostics-of-breast-metastases-from-extramammary-tumors
#3
REVIEW
S Wienbeck, S Nemat, J Lotz, A Surov
Breast metastases of solid extramammary tumors are very rare in comparison to primary malignancies of the breast and account for only 0.33-6.3% of all malignant neoplasms of the breast. The most common primary tumors are malignant melanoma, distant sarcomas, lung cancer, ovarian cancer, renal cell cancer and thyroid cancer in decreasing order of frequency. This review article summarizes the clinical features and the different imaging findings of breast metastases from different extramammary solid tumors. Breast metastases are often incidental findings in computed tomography (CT) or positron emission tomography CT (PET-CT) imaging...
April 26, 2017: Der Radiologe
https://www.readbyqxmd.com/read/28446999/minimally-invasive-staging-of-esophageal-cancer
#4
REVIEW
Kunal Mehta, Valentino Bianco, Omar Awais, James D Luketich, Arjun Pennathur
Esophageal cancer is one of the most common malignancies in the world today and the sixth-leading cause of cancer-related mortality. Accurate preoperative staging of esophageal cancer is imperative to the selection of appropriate treatments. Patients with esophageal carcinomas typically undergo a multimodality staging process including noninvasive imaging techniques, such as computed tomography (CT) and positron emission tomography (PET), as well as endoscopic ultrasound (EUS), which is slightly more invasive...
March 2017: Annals of Cardiothoracic Surgery
https://www.readbyqxmd.com/read/28446946/neural-imaging-using-single-photon-avalanche-diodes
#5
Mohammad Azim Karami, Misagh Ansarian
INTRODUCTION: This paper analyses the ability of single-photon avalanche diodes (SPADs) for neural imaging. The current trend in the production of SPADs moves toward the minimum dark count rate (DCR) and maximum photon detection probability (PDP). Moreover, the jitter response which is the main measurement characteristic for the timing uncertainty is progressing. METHODS: The neural imaging process using SPADs can be performed by means of florescence lifetime imaging (FLIM), time correlated single-photon counting (TCSPC), positron emission tomography (PET), and single-photon emission computed tomography (SPECT)...
January 2017: Basic and Clinical Neuroscience
https://www.readbyqxmd.com/read/28445287/prognostic-value-of-pretreatment-18f-fdg-pet-ct-for-nasopharyngeal-carcinoma-patients
#6
Yecai Huang, Mei Feng, Qiao He, Jun Yin, Peng Xu, Qinghua Jiang, Jinyi Lang
BACKGROUND: Nasopharyngeal carcinoma (NPC) is a special subtype of head and neck cancer (HNC). At present, there are no highly specific prognostic markers to aid in tumor grading and guide patient treatment modalities for NPC. The prognostic value of pretreatment F-fluorodeoxyglucose positron emission tomography-computed tomography (F-PET-CT) in NPC patients is controversial and no consensus exists as to its predictive capability. METHODS: To analyze the predictive efficacy of F-PET-CT imaging in NPC patients, data from MEDLINE, EMBASE, the Cochrane library, CBM, CNKI, and VIP (inception to July 2016) were accessed...
April 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28444968/carcinoembryonic-antigen-directed-pet-cect-scanning-for-post-operative-surveillance-of-colorectal-cancer
#7
Karthik Chandra Vallam, Guruchannabasavaiah B, Archi Agrawal, Venkatesh Rangarajan, Vikas Ostwal, Reena Engineer, Avanish Saklani
AIM: During the follow-up of surgically resected colorectal cancer (CRC), positron emission tomography-contrast-enhanced computed tomography (PET-CECT) is indicated for asymptomatic elevation of carcinoembryonic antigen (CEA) > 5 ng/ml and no obvious site of recurrence on clinical examination and basic imaging. As an institutional policy, PET-CECT scan was performed at our institute whenever (1) CEA levels rose above 5 ng/ml and (2) CEA values were doubled (even if CEA level was <5 ng/ml)...
April 26, 2017: Colorectal Disease: the Official Journal of the Association of Coloproctology of Great Britain and Ireland
https://www.readbyqxmd.com/read/28444763/manganese-concentration-mapping-in-the-rat-brain-with-mri-pet-and-autoradiography
#8
Geoffrey J Topping, Andrew Yung, Paul Schaffer, Cornelia Hoehr, Rick Kornelsen, Piotr Kozlowski, Vesna Sossi
PURPOSE: Mn(2+) is used a contrast agent and marker for neuronal activity with magnetic resonance imaging (MRI) in rats and mice, but its accumulation is generally not assessed quantitatively. In this work, non-radioactive Mn and (52) Mn are injected simultaneously in rats, and imaged with MRI, positron emission tomography (PET) and autoradiography (AR). Mn distributions are compared between modalities, to assess the potential and limitations on quantification of Mn with MRI, and to investigate the potential of multimodal measurement of Mn accumulation...
April 26, 2017: Medical Physics
https://www.readbyqxmd.com/read/28444638/nuclear-cardiology-are-we-using-the-right-protocols-and-tracers-the-right-way
#9
REVIEW
Maurizio Dondi, Thomas Pascual, Diana Paez, Andrew J Einstein
The field of nuclear cardiology has changed considerably over recent years, with greater attention paid to safety and radiation protection issues. The wider usage of technetium-99m (Tc-99m)-labeled radiopharmaceuticals for single-photon emission computed tomography (SPECT) imaging using gamma cameras has contributed to better quality studies and lower radiation exposure to patients. Increased availability of tracers and scanners for positron emission tomography (PET) will help further improve the quality of studies and quantify myocardial blood flow and myocardial flow reserve, thus enhancing the contribution of non-invasive imaging to the management of coronary artery disease...
April 25, 2017: American Journal of Cardiovascular Drugs: Drugs, Devices, and Other Interventions
https://www.readbyqxmd.com/read/28443841/automatic-concentration-and-reformulation-of-pet-tracers-via-microfluidic-membrane-distillation
#10
Philip H Chao, Jeffery Collins, Joseph P Argus, Wei-Yu Tseng, Jason T Lee, R Michael van Dam
Short-lived radiolabeled tracers for positron emission tomography (PET) must be rapidly synthesized, purified, and formulated into injectable solution just prior to imaging. Current radiosynthesizers are generally designed for clinical use, and the HPLC purification and SPE formulation processes often result in a final volume that is too large for preclinical and emerging in vitro applications. Conventional technologies and techniques for reducing this volume tend to be slow, resulting in radioactive decay of the product, and often require manual handling of the radioactive materials...
April 26, 2017: Lab on a Chip
https://www.readbyqxmd.com/read/28443145/initial-single-centre-canadian-experience-with-18f-fluoromethylcholine-positron-emission-tomography-computed-tomography-18f-fch-pet-ct-for-biochemical-recurrence-in-prostate-cancer-patients-initially-treated-with-curative-intent
#11
Simon Gauvin, Yannick Cerantola, Eléonore Haberer, Vincent Pelsser, Stephan Probst, Franck Bladou, Maurice Anidjar
INTRODUCTION: We sought to determine predictive factors (patient and prostate-specific antigen [PSA] characteristics) for 18F-fluoromethylcholine positron emission tomography-computed tomography (18F-FCH PET/CT) positivity in the context of biochemical recurrence after local treatment of prostate cancer (PCa) with curative intent. METHODS: This is a retrospective study including 60 18F-FCH PET/CT scans of patients with biochemical recurrence after initial radical prostatectomy (RP), external beam radiation therapy (EBRT), or focal high-intensity focused ultrasound (HIFU) with curative intent...
January 2017: Canadian Urological Association Journal, Journal de L'Association des Urologues du Canada
https://www.readbyqxmd.com/read/28442297/vertebral-and-femoral-bone-mineral-density-and-bone-strength-in-prostate-cancer-patients-assessed-in-phantomless-pet-ct-examinations
#12
Benedikt J Schwaiger, David L Kopperdahl, Lorenzo Nardo, Luca Facchetti, Alexandra S Gersing, Jan Neumann, Kwang J Lee, Tony M Keaveny, Thomas M Link
PURPOSE: Bone fracture risk assessed ancillary to positron emission tomography with computed tomography co-registration (PET/CT) could provide substantial clinical value to oncology patients with elevated fracture risk without introducing additional radiation dose. The purpose of our study was to investigate the feasibility of obtaining valid measurements of bone mineral density (BMD) and finite element analysis-derived bone strength of the hip and spine using PET/CT examinations of prostate cancer patients by comparing against values obtained using routine multidetector-row computed tomography (MDCT) scans-as validated in previous studies-as a reference standard...
April 22, 2017: Bone
https://www.readbyqxmd.com/read/28441967/comparison-of-csf-markers-and-semi-quantitative-amyloid-pet-in-alzheimer-s-disease-diagnosis-and-in-cognitive-impairment-prognosis-using-the-adni-2-database
#13
Fayçal Ben Bouallègue, Denis Mariano-Goulart, Pierre Payoux
BACKGROUND: The relative performance of semi-quantitative amyloid positron emission tomography (PET) and cerebrospinal fluid (CSF) markers in diagnosing Alzheimer's disease (AD) and predicting the cognitive evolution of patients with mild cognitive impairment (MCI) is still debated. METHODS: Subjects from the Alzheimer's Disease Neuroimaging Initiative 2 with complete baseline cognitive assessment (Mini Mental State Examination, Clinical Dementia Rating [CDR] and Alzheimer's Disease Assessment Scale-Cognitive Subscale [ADAS-cog] scores), CSF collection (amyloid-β1-42 [Aβ], tau and phosphorylated tau) and (18)F-florbetapir scans were included in our cross-sectional cohort...
April 26, 2017: Alzheimer's Research & Therapy
https://www.readbyqxmd.com/read/28441370/conventional-modalities-and-novel-emerging-imaging-techniques-for-musculoskeletal-tumors
#14
Meera Raghavan
BACKGROUND: Imaging of musculoskeletal tumors requires a multimodality approach and includes radiography, computed tomography (CT), and magnetic resonance imaging (MRI). METHODS: Topics related to primary bone and soft-tissue tumors are reviewed. The fundamental imaging principles are discussed as well as the applications of emerging imaging modalities. RESULTS: MRI is the preferred technique for the evaluation of musculoskeletal tumors, whereas other imaging modalities play a complementary role...
April 2017: Cancer Control: Journal of the Moffitt Cancer Center
https://www.readbyqxmd.com/read/28438628/diagnostic-accuracy-of-64-cu-psma-pet-ct-for-primary-lymph-node-staging-of-intermediate-to-high-risk-prostate-cancer-our-preliminary-experience
#15
Francesco Cantiello, Vincenzo Gangemi, Giuseppe Lucio Cascini, Ferdinando Calabria, Marco Moschini, Matteo Ferro, Gennaro Musi, Salvatore Butticè, Andrea Salonia, Alberto Briganti, Rocco Damiano
OBJECTIVE: To assess the diagnostic accuracy of (64)Copper Prostate-Specific Membrane Antigen ((64)Cu PSMA) positron emission tomography/computed tomography (PET/CT) in the primary lymph node (LN) staging of a selected cohort of intermediate-high risk Prostate Cancer (PCa) patients. MATERIALS AND METHODS: An observational prospective study was performed in 23 patients with intermediate-high risk PCa, who underwent (64)Cu-PSMA PET/CT for local and lymph nodal staging before laparoscopic radical prostatectomy (LRP) with an extended pelvic LN dissection...
April 21, 2017: Urology
https://www.readbyqxmd.com/read/28438468/clinical-results-and-economic-considerations-of-68-ga-psma-and-radiolabeled-choline-in-prostate-cancer
#16
Laura Evangelista, Maria Giuseppina Bonavina, Emilio Bombardieri
In recent years there was an impressive improvement in the options for the management of patients with prostate cancer. Nuclear Medicine has significantly enriched its diagnostic options, both in radiopharmacy and in instrumentation, in order to accurately target prostatic cancer cells, thus rendering the physicians able to adopt the best therapeutic strategy. In the present analysis, we have evaluated the available published data about 68Ga-PSMA and radio-labeled choline, two radiopharmaceutical agents for positron emission tomography/computed tomography (PET/CT) examination, by reporting clinical information and considering data about legal, economic and organization aspects...
April 5, 2017: Nuclear Medicine and Biology
https://www.readbyqxmd.com/read/28438067/gene-therapy-for-patients-with-advanced-solid-tumors-a-phase-i-study-using-gene-electrotransfer-to-muscle-with-the-integrin-inhibitor-plasmid-amep
#17
Iben Spanggaard, Karin Dahlstroem, Line Laessoee, Rasmus Hvass Hansen, Helle Hjorth Johannesen, Helle Westergren Hendel, Céline Bouquet, Pierre Attali, Julie Gehl
BACKGROUND: Gene electrotrotransfer describes the use of electric pulses to transfer DNA to cells. Particularly skeletal muscle has potential for systemic secretion of therapeutic proteins. Gene electrotransfer to muscle using the integrin inhibitor plasmid AMEP (Antiangiogenic MEtargidin Peptide) was investigated in a phase I dose escalation study. Primary objective was safety. MATERIAL AND METHODS: Patients with metastatic or locally advanced solid tumors, without further standard treatments available, were treated with once-only gene electrotransfer of plasmid AMEP to the femoral muscle...
April 25, 2017: Acta Oncologica
https://www.readbyqxmd.com/read/28437735/detective-quantum-efficiency-dqe-in-pet-scanners-a-simulation-study
#18
George E Karpetas, Christos M Michail, George P Fountos, Nektarios I Kalyvas, Ioannis G Valais, Ioannis S Kandarakis, George S Panayiotakis
The aim of the present study is to introduce the detective quantum efficiency (DQE) for the image quality assessment of positron emission tomography (PET) scanners. For this purpose, a thin layer chromatography (TLC) plane source was simulated using a previously validated, scanner and source geometry, Monte Carlo (MC) model. The model was developed with the Geant4 application for tomographic emission (GATE) MC package and reconstructed images obtained with the software for tomographic image reconstruction (STIR), with cluster computing...
April 12, 2017: Applied Radiation and Isotopes
https://www.readbyqxmd.com/read/28437565/relaxed-ordered-subset-preconditioned-alternating-projection-algorithm-for-pet-reconstruction-with-automated-penalty-weight-selection
#19
C Ross Schmidtlein, Yizun Lin, Si Li, Andrzej Krol, Bradley J Beattie, John L Humm, Yuesheng Xu
PURPOSE: Performance of the preconditioned alternating projection algorithm (PAPA) using relaxed ordered subsets (ROS) with a non-smooth penalty function was investigated in positron emission tomography (PET). A higher order total variation (HOTV) regularizer was applied and a method for unsupervised selection of penalty weights based on the measured data is introduced. METHODS: A ROS version of PAPA with HOTV penalty (ROS-HOTV-PAPA) for PET image reconstruction was developed and implemented...
April 24, 2017: Medical Physics
https://www.readbyqxmd.com/read/28436919/a-machine-learning-method-for-fast-and-accurate-characterization-of-depth-of-interaction-gamma-cameras
#20
Stefano Pedemonte, Larry Pierce, Koen Van Leemput
Measuring the depth-of-interaction (DOI) of gamma photons enables increasing the resolution of emission imaging systems. Several design variants of DOI-sensitive detectors have been recently introduced to improve the performance of scanners for Positron Emission Tomography (PET). However, the accurate characterization of the response of DOI detectors, necessary to accurately measure the DOI, remains an unsolved problem. Numerical simulations are, at the state of the art, imprecise, while measuring directly the characteristics of DOI detectors experimentally is hindered by the impossibility to impose the depth-of-interaction in an experimental set-up...
April 24, 2017: Physics in Medicine and Biology
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