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https://www.readbyqxmd.com/read/28432915/proton-induced-production-and-radiochemical-isolation-of-44-ti-from-scandium-metal-targets-for-44-ti-44-sc-generator-development
#1
Valery Radchenko, Jonathan W Engle, Dmitri G Medvedev, Joel M Maassen, Cleo M Naranjo, George A Unc, Catherine A L Meyer, Tara Mastren, Mark Brugh, Leonard Mausner, Cathy S Cutler, Eva R Birnbaum, Kevin D John, F Meiring Nortier, Michael E Fassbender
Scandium-44g (half-life 3.97h) shows promise for application in positron emission tomography (PET), due to favorable decay parameters. One of the sources of (44g)Sc is the (44)Ti/(44g)Sc generator, which can conveniently provide this radioisotope on a daily basis at a diagnostic facility. Titanium-44 (half-life 60.0 a), in turn, can be obtained via proton irradiation of scandium metal targets. A substantial (44)Ti product batch, however, requires high beam currents, long irradiation times and an elaborate chemical procedure for (44)Ti isolation and purification...
April 7, 2017: Nuclear Medicine and Biology
https://www.readbyqxmd.com/read/28417857/nuclear-medicine-imaging-in-pediatric-infection-or-chronic-inflammatory-diseases
#2
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
#3
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/28408532/-68-ga-thp-psma-a-pet-imaging-agent-for-prostate-cancer-offering-rapid-room-temperature-one-step-kit-based-radiolabeling
#4
Jennifer D Young, Vincenzo Abbate, Cinzia Imberti, Levente K Meszaros, Michelle T Ma, Samantha Y A Terry, Robert C Hider, Greg E Mullen, Philip J Blower
The clinical impact and accessibility of (68)Ga tracers for the prostate-specific membrane antigen (PSMA) and other targets would be greatly enhanced by the availability of a simple, one-step kit-based labeling process. Radiopharmacy staff are accustomed to such procedures in the daily preparation of (99m)Tc radiopharmaceuticals. Currently, chelating agents used in (68)Ga radiopharmaceuticals do not meet this ideal. AIM: To develop and evaluate preclinically a (68)Ga radiotracer for imaging PSMA expression that could be radiolabeled simply by addition of (68)Ga generator eluate to a cold kit...
April 13, 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/28388273/musculoskeletal-imaging-findings-of-hematologic-malignancies
#5
Shannon M Navarro, George R Matcuk, Dakshesh B Patel, Matthew Skalski, Eric A White, Anderanik Tomasian, Aaron J Schein
Hematologic malignancies comprise a set of prevalent yet clinically diverse diseases that can affect every organ system. Because blood components originate in bone marrow, it is no surprise that bone marrow is a common location for both primary and metastatic hematologic neoplasms. Findings of hematologic malignancy can be seen with most imaging modalities including radiography, computed tomography (CT), technetium 99m ((99m)Tc) methylene diphosphonate (MDP) bone scanning, fluorine 18 ((18)F) fluorodeoxyglucose (FDG) positron emission tomography (PET)/CT, and magnetic resonance (MR) imaging...
April 7, 2017: Radiographics: a Review Publication of the Radiological Society of North America, Inc
https://www.readbyqxmd.com/read/28385795/-18-f-tetrafluoroborate-18-f-tfb-a-pet-probe-for-imaging-sodium-iodide-symporter-expression-whole-body-biodistribution-safety-and-radiation-dosimetry-in-thyroid-cancer-patients
#6
Jim O' Doherty, Maite Jauregui-Osoro, Teresa Brothwood, Teresa Szyszko, Paul Marsden, Michael O' Doherty, Gary Cook, Philip Blower, Val Lewington
Rationale: We report the safety, biodistribution and internal radiation dosimetry, in humans with thyroid cancer, of (18)F-tetrafluoroborate ((18)F-TFB), a novel PET radioligand for imaging the human sodium/iodide symporter (hNIS). Methods: Serial whole-body PET scans of 5 subjects with recently diagnosed with thyroid cancer were acquired prior to surgery for up to 4 hours after injection of 184 ± 15 MBq of (18)F-TFB. Activity was determined in whole blood, plasma and urine. Mean organ absorbed doses and effective doses were calculated via quantitative image analysis and using OLINDA/EXM software...
April 6, 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/28382512/microsurgery-guided-by-sequential-preoperative-lymphography-using-68-ga-neb-pet-and-mri-in-patients-with-lower-limb-lymphedema
#7
Xiao Long, Jingjing Zhang, Daming Zhang, Chao Gao, Chongwei Chi, Elan Yang, Huadan Xue, Lixin Lang, Gang Niu, Zhaohui Zhu, Fang Li, Xiaoyuan Chen
OBJECTIVE: The popularity of contemporary microsurgical techniques in treatment of lower-limb lymphedema calls for better visualization of the lymphatic system, both preoperatively and intra-operatively. The aim of this prospective study was to investigate the feasibility of a novel combination of (68)Ga-NEB positron emission tomography (PET) with magnetic resonance lymphography (MRL) in evaluating lymphedema and guiding surgical intervention. METHODS: A total of 11 patients (F 9, M 2, age range 29-69 y) with lower-limb lymphedema classified into stage I to III were recruited...
April 5, 2017: European Journal of Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/28366421/-18-f-choline-pet-ct-scan-in-staging-and-biochemical-recurrence-in-prostate-cancer-patients-changes-in-classification-and-radiotherapy-planning
#8
J Cardona Arboniés, B Rodríguez Alfonso, J Mucientes Rasilla, C Martínez Ballesteros, I Zapata Paz, A Prieto Soriano, J Carballido Rodriguez, M Mitjavila Casanovas
OBJECTIVE: To evaluate the role of the (18)F-Choline PET/CT in prostate cancer management when detecting distant disease in planning radiotherapy and staging and to evaluate the therapy changes guided by PET/TC results. MATERIAL AND METHODS: A retrospective evaluation was performed on (18)F-Choline PET/CT scans of patients with prostate cancer. Staging and planning radiotherapy scans were selected in patients with at least 9 months follow up. There was a total of 56 studies, 33 (58...
March 30, 2017: Revista Española de Medicina Nuclear e Imagen Molecular
https://www.readbyqxmd.com/read/28357812/clinical-performance-of-rb-82-myocardial-perfusion-pet-and-tc-99m-based-spect-in-patients-with-extreme-obesity
#9
David T Harnett, Samir Hazra, Ronnen Maze, Brian A Mc Ardle, Ali Alenazy, Trevor Simard, Ellen Henry, Girish Dwivedi, Christopher Glover, Robert A deKemp, Ross A Davies, Terrence D Ruddy, Benjamin J W Chow, Rob S Beanlands, Benjamin Hibbert
BACKGROUND: We evaluated the performance of stress imaging with technetium-99m-labeled tetrofosmin single-photon emission computed tomography (SPECT) and rubidium-82 positron emission tomography (PET) in patients with extreme obesity, defined as body mass index ≥40 kg/m(2). METHODS: We identified patients with extreme obesity who underwent angiography in our center and either stress SPECT or PET within the previous six months. Cohorts of patients with extreme obesity and a <5% pretest likelihood of CAD who underwent SPECT (N = 25) or PET (N = 25) were also included...
March 29, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/28346248/68ga-psma-pet-ct-in-osteosarcoma-in-fibrous-dysplasia
#10
Arun Sasikumar, Ajith Joy, M R A Pillai, Tony M Alex, Geetha Narayanan
Fibrous dysplasia (FD) is a benign bone lesion with a rare but potential for malignant transformation. Neither Tc-MDP nor F-FDG PET/CT can differentiate between FD and areas of malignant transformation in FD. We described a case of osteosarcoma developing in FD with selective uptake of tracer in malignant transformation areas demonstrated on a Ga-PSMA PET/CT scan. Our case highlights the ability of Ga-PSMA PET/CT to map tumor neoangiogenesis in osteosarcoma arising in FD, which can have potential implications in prognostication, possibility of antiangiogenesis-based therapeutic options, and in response assessment following chemotherapy...
March 24, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28323232/suspected-giant-cell-aortitis-from-multiple-aortic-structural-damage-to-fatal-listeria-sepsi-a-case-report
#11
Valeria Silvestri, Giacomo Isernia
Giant cell arteritis ( GCA) is an inflammatory vasculopathy affecting large and middle-sized vessels , specifically cranial arteries derived from carotid artery. Isolated extracranial vessel involvement can occur. Interest in extravascular manifestations is recently increasing because of diffusion of sensitive and specific imaging tools such as 18FDG PET TC . Patients have an increased relative risk of severe infection. Listeria monocytogenes infection risk is increased, and vascular system involvement and graft infection have been, even though rarely, reported...
March 16, 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/28319503/myocardial-infarction-in-a-patient-with-hypertrophic-cardiomyopathy-but-normal-coronary-arteries
#12
Shuheng Li, Xiaoxin Sun, Zongyao Zhang, Zuo-Xiang He
A 57-year-old man with a history of hypertrophic cardiomyopathy diagnosed by echocardiography experienced atypical chest pain and dyspnea for 6 months. A rest Tc-MIBI myocardial SPECT imaging and a F-FDG myocardial PET/CT imaging were performed, which showed multiple matched myocardial perfusion/metabolism defects in the left ventricle, indicating scar tissue. Surprisingly, subsequent contrast coronary angiography revealed no significant coronary artery stenosis.
March 17, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28319500/clinical-response-profile-of-metastatic-advanced-pulmonary-neuroendocrine-tumors-to-peptide-receptor-radionuclide-therapy-with-177lu-dotatate
#13
Rahul V Parghane, Sanjay Talole, Kumar Prabhash, Sandip Basu
OBJECTIVES: The aims of this study were to perform multiparametric response assessment of metastatic/advanced pulmonary neuroendocrine tumors (NETs) to Lu-DOTATATE peptide receptor radionuclide therapy (PRRT) (clinical, biochemical, molecular/structural imaging, and survival assessment) and to study the relationship between response, mortality, and overall survival with dual-tracer molecular imaging parameters. METHODS: Twenty-two patients (6 women, 16 men; median age, 44 years; range, 16-72 years) of histopathologically proven pulmonary NETs with metastatic/advanced disease were included and analyzed retrospectively...
March 17, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28315917/a-pediatric-hypophosphatemic-rickets-on-mri-99m-tc-mdp-bone-scan-and-18-f-fdg-pet-ct
#14
Changyun Xu, Chao Ma, Yongli Bai
We present a case of a 13 years old boy who was hospitalized with a 10 months history of progressive pain and weakness in his lower extremities. The laboratory tests revealed slightly decreased phosphate and 25-hydroxyvitamin D3, high alkaline phosphatase, normal calcium and parathyroid hormone (PTH). Magnetic resonance imaging (MRI) showed multiple patchy lesions indicating bone destruction in the metaphyses and epiphyses of the left knee. Fluorine-18-fluorodeoxyglucose positron emission tomography/computed tomography ((18)F-FDG PET/CT) revealed a generalized decrease of bone density in axial bones with slightly increased (18)F-FDG metabolism...
January 2017: Hellenic Journal of Nuclear Medicine
https://www.readbyqxmd.com/read/28291693/synthesis-and-evaluation-of-a-ligand-targeting-the-%C3%AE-and-%C3%AE-opioid-receptors-for-drug-delivery-to-lung-cancer
#15
Guo Li, Philip S Low
A well-established approach to developing new imaging agents and treatments for cancer begins with the recognition of receptors that are overexpressed in cancer cells. Ideally, these same receptors would also be absent, or minimally expressed, in healthy tissue. The mu (μ) and delta (δ) opioid receptors (MOR and DOR respectively) match these criteria, with expression in cancer cells that is higher than primary lung epithelial cells. Naltrexone is a drug approved by the U.S. Food and Drug Administration (FDA) for treatment of alcohol dependence or prevention of relapse from opioid addiction...
May 1, 2017: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/28288383/effect-of-methoxy-group-position-on-biological-properties-of-18-f-labeled-benzyl-triphenylphosphonium-cations
#16
Shuting Chen, Zuoquan Zhao, Ying Zhang, Wei Fang, Jie Lu, Xianzhong Zhang
INTRODUCTION: (18)F-labeled phosphonium cations targeting mitochondrial membrane potential would be promising for positron emission tomography (PET) myocardial perfusion imaging (MPI). The purpose of this study was to examine the influence of additional methoxy group and its different positions on myocardium uptake and pharmacokinetics properties of (18)F-labeled benzyl triphenylphosphonium cations. METHOD: In this study, three novel (18)F-labeled phosphonium cations, [(18)F]4-(fluoromethyl)benzyltris(4-methoxyphenyl) phosphonium cation (1b), [(18)F]4-(fluoromethyl)benzyltris(2-methoxyphenyl) phosphonium cation (2b) and [(18)F]4-(fluoromethyl)benzyltris(3-methoxyphenyl) phosphonium cation (3b), were efficiently prepared by a One-Pot method starting from the substitution of non-carried-added fluoride-18...
February 24, 2017: Nuclear Medicine and Biology
https://www.readbyqxmd.com/read/28244975/clinical-utility-of-99mtc-ubiquicidin-29-41-as-an-adjunct-to-bone-scan-in-differentiating-infected-versus-noninfected-loosening-of-prosthesis-before-revision-surgery
#17
Ajit S Shinto, Archana Mukherjee, Kamalaeshwaran Koramadai Karuppusamy, Jephy Joseph, Jyotsna Bhatt, Aruna Korde, Indira Upadhya, Chanda Arjun, Grace Samuel, Ashutosh Dash
PURPOSE: The aim of this study was to evaluate the utility of Tc-ubiquicidin (Tc-UBI) (29-41) as an adjunct to an methylene diphosphonate (MDP) bone scan in differentiating septic versus aseptic loosening in patients with painful prosthesis posted for revision surgery. PATIENTS AND METHODS: A two-vial cold kit of UBI (29-41) was prepared and utilized for the preparation of patient dose of Tc-UBI (29-41). Twenty two patients with painful hip or knee prosthesis and scheduled for revision surgery were included in the study...
April 2017: Nuclear Medicine Communications
https://www.readbyqxmd.com/read/28242988/-18-f-fluorodeoxyglucose-positron-emission-tomography-computed-tomography-scan-in-an-unusual-case-of-lymphoma-with-secondary-involvement-of-uterine-cervix-presenting-as-a-pathological-fracture
#18
Arun Sasikumar, Ajith Joy, M R A Pillai, Boben Thomas
A 48-year-old female presented with a pathological fracture of the right femur. (99m)Tc methylene diphosphonate bone scan revealed multiple areas of increased osteoblastic activity consistent with metastatic disease. Serum electrophoresis revealed monoclonal gammopathy. (18)F-fluorodeoxyglucose positron emission tomography/computed tomography ((18)F-FDG PET/CT) scan revealed metabolically active lesions in bulky uterine cervix and osteolytic skeletal lesions. Unusual pattern of FDG uptake in uterine cervix and osteolytic skeletal lesions warranted a biopsy of the uterine cervix which revealed diffuse large B-cell lymphoma...
January 2017: Indian Journal of Nuclear Medicine: IJNM: the Official Journal of the Society of Nuclear Medicine, India
https://www.readbyqxmd.com/read/28238581/correlation-of-technetium-99m-macroaggregated-albumin-and-yttrium-90-glass-microsphere-biodistribution-in-hepatocellular-carcinoma-a-retrospective-review-of-pretreatment-single-photon-emission-ct-and-posttreatment-positron-emission-tomography-ct
#19
Paul Haste, Mark Tann, Scott Persohn, Thomas LaRoche, Vasantha Aaron, Thibault Mauxion, Nikhil Chauhan, Matthew R Dreher, Matthew S Johnson
PURPOSE: To evaluate whether technetium-99 ((99m)Tc)-labeled macroaggregated albumin (MAA) can predict subsequent yttrium-90 ((90)Y) distribution and imaging response in patients with hepatocellular carcinoma (HCC). MATERIALS: Retrospective review was performed of records of 83 patients with HCC who underwent (90)Y glass microsphere radioembolization with (99m)Tc-MAA single photon emission computed tomography (SPECT) and (90)Y positron emission tomography (PET)/CT between January 2013 and December 2014...
February 23, 2017: Journal of Vascular and Interventional Radiology: JVIR
https://www.readbyqxmd.com/read/28218350/parathyroid-hyperplasia-detected-by-f-18-choline-pet-ct-negative-on-tc-99m-mibi-spect-ct-and-f-18-deoxyglucose-pet-ct-scans
#20
Anna Nocuń, Mariusz Kędra, Bogusław Stefaniak, Beta Chrapko
No abstract text is available yet for this article.
2017: Nuclear Medicine Review. Central & Eastern Europe
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