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Pet scan

Aqiba Bokhari, Patricia G Tiscornia-Wasserman
Renal cell carcinoma metastases to pancreas, thyroid, and contralateral adrenal gland are decidedly uncommon. Clear cell renal cell carcinoma (CCRCC) is the most frequent subtype. Cytology diagnosis may be challenging. A 74-year-old male with remote history of vocal cord malignancy and hypertension presented with abdominal pain. Computed tomography (CT) revealed 8.4 cm left renal mass highly suspicious for renal cell carcinoma, a 1.8 cm mass within vessels near left adrenal and a 2.5 cm mass in pancreatic tail...
October 22, 2016: Diagnostic Cytopathology
Alexander Romagna, Marcus Unterrainer, Christine Schmid-Tannwald, Matthias Brendel, Jörg-Christian Tonn, Silke Birgit Nachbichler, Alexander Muacevic, Peter Bartenstein, Friedrich-Wilhelm Kreth, Nathalie Lisa Albert
BACKGROUND: After focused high dose radiotherapy of brain metastases, differentiation between tumor recurrence and radiation-induced lesions by conventional MRI is challenging. This study investigates the usefulness of dynamic O-(2-(18)F-Fluoroethyl)-L-Tyrosine positron emission tomography ((18)F-FET PET) in patients with MRI-based suspicion of tumor recurrence after focused high dose radiotherapy of brain metastases. METHODS: Twenty-two patients with 34 brain metastases (median age 61...
October 21, 2016: Radiation Oncology
Francesco Giganti, Alessandro Ambrosi, Maria Chiara Petrone, Carla Canevari, Damiano Chiari, Annalaura Salerno, Paolo Giorgio Arcidiacono, Roberto Nicoletti, Luca Albarello, Elena Mazza, Francesca Gallivanone, Luigi Gianolli, Elena Orsenigo, Antonio Esposito, Carlo Staudacher, Alessandro Del Maschio, Francesco De Cobelli
OBJECTIVES: To compare the diagnostic performance of Magnetic Resonance (MR) and diffusion-weighted imaging (DWI), Multidetector Computed Tomography (MDCT), Endoscopic Ultrasonography (EUS) and (18)F-FDG (Fluorodeoxyglucose) Positron Emission Tomography - Computed Tomography (PET-CT) in the preoperative loco-regional staging of oesophageal cancer. METHODS: Eighteen patients with oesophageal or Siewert I tumour (9 directly treated with surgery and 9 addressed to chemo/radiotherapy before) underwent 1...
October 21, 2016: British Journal of Radiology
Vidya Ramachandraiah, Wilbert Aronow, Dipak Chandy
Sarcoidosis is a multisystem disease characterized by the presence of noncaseating granulomas, the exact etiology of which is yet to be determined. Pulmonary involvement occurs in the majority of patients and its severity ranges from asymptomatic involvement of mediastinal lymph nodes to progressive pulmonary fibrosis and chronic respiratory failure that is insensitive to treatment. Diagnosis of pulmonary sarcoidosis requires a compatible clinical picture supported by radiologic and pathologic data. A recent development in establishing the diagnosis of pulmonary sarcoidosis is endobronchial ultrasound that increases the yield of transbronchial needle aspiration of hilar and/or mediastinal lymph nodes...
October 21, 2016: Postgraduate Medicine
Maria Danielsen, Andreas Kjaer, Max Wu, Lea Martineau, Mehdi Nosrati, Stanley Pl Leong, Richard W Sagebiel, James R Miller Iii, Mohammed Kashani-Sabet
Positron emission tomography/computed tomography (PET/CT) is an important tool to identify occult melanoma metastasis. To date, it is controversial which patients with primary cutaneous melanoma should have staging PET/CT. In this retrospective analysis of more than 800 consecutive patients with cutaneous melanoma, we sought to identify factors predictive of PET/CT positivity in the setting of newly-diagnosed high-risk primary melanoma to determine those patients most appropriate to undergo a PET/CT scan as part of their diagnostic work up...
2016: American Journal of Nuclear Medicine and Molecular Imaging
David Fällmar, Johan Lilja, Lena Kilander, Torsten Danfors, Mark Lubberink, Elna-Marie Larsson, Jens Sörensen
The dosage of (18)F-FDG must be sufficient to ensure adequate PET image quality. For younger patients and research controls, the lowest possible radiation dose should be used. The purpose of this study was to find a protocol for FDG-PET of the brain with reduced radiation dose and preserved quantitative characteristics. Eight patients with neurodegenerative disorders and nine controls (n=17) underwent FDG-PET/CT twice on separate occasions, first with normal-dose (3 MBq/kg), and second with low-dose (0.75 MBq/kg, 25% of the original)...
2016: American Journal of Nuclear Medicine and Molecular Imaging
Andreas Hahn, Martin Schain, Maria Erlandsson, Petter Sjölin, Gregory M James, Olof T Strandberg, Douglas Hägerström, Rupert Lanzenberger, Jonas Jögi, Tomas G Olsson, Ruben Smith, Oskar Hansson
: Aggregation of hyperphosphorylated tau is a major hallmark of many neurodegenerative diseases, including Alzheimer's disease. In vivo imaging with positron emission tomography (PET) may offer important insights in pathophysiological mechanisms, diagnosis and disease progression. We describe different strategies for quantification of (18)F-AV1451 (T807) tau binding, including models with blood sampling and non-invasive alternatives. METHODS: 15 subjects (4 controls, 6 Alzheimer's disease (AD), 3 progressive supranuclear palsy (PSP), 2 cortico basal syndrome (CBS)) underwent 180 min PET with (18)F-AV1451 and arterial blood sampling...
October 20, 2016: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
Sharon K Michelhaugh, Otto Muzik, Anthony R Guastella, Neil V Klinger, Lisa A Polin, Hancheng Cai, Yanchun Xin, Thomas J Mangner, Shaohui Zhang, Csaba Juhasz, Sandeep Mittal
: Abnormal tryptophan metabolism via the kynurenine pathway (KP) is involved in the pathophysiology of a variety of human diseases including cancers. α-[(11)C]-methyl-L-tryptophan ((11)C-AMT) positron emission tomography (PET) imaging demonstrated increased tryptophan uptake and trapping in epileptic foci and brain tumors, but the short half-life of (11)C limits its widespread clinical application. Recent in vitro studies suggested that the novel radiotracer 1-(2-[(18)F]fluoroethyl)-L-tryptophan ((18)F-FETrp) may be useful to assess tryptophan metabolism via the KP...
October 20, 2016: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
Marc Jansen, Sophie Em Veldhuijzen van Zanten, Dannis G Van Vuurden, Marc Huisman, Danielle J Vugts, Otto S Hoekstra, Guus A M S van Dongen, Gert-Jan Jl Kaspers
: Predictive tools to guide therapy in children with brain tumors are urgently needed. We introduced molecular imaging to facilitate this. We investigated whether bevacizumab can reach the tumor in children with diffuse intrinsic pontine glioma (DIPG) by measuring the tumor uptake of zirconium-89((89)Zr)-labeled bevacizumab by PET. In addition we evaluated the safety of the procedure in children and determined the optimal timing of imaging. METHODS: Patients received 0...
October 20, 2016: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
Zhanli Fu, Meng Liu, Jin Zhang, Ziao Li, Qian Li
Multiple renal lesions, which showed clearly demarcated low densities on contrast-enhanced CT, were revealed in a 56-year-old woman. The F-FDG avidity of the renal lesions was equal to or mildly higher than that of the renal cortex on the routine PET/CT scan, but significantly higher on the delayed scan. IgG4-related disease with renal involvement was confirmed subsequently by the measurement of serous IgG4 and the pathology of renal lesion.
October 18, 2016: Clinical Nuclear Medicine
Asif Ali Fakhri, Paul David Rodrigue, Amena Fatima Fakhri
Extramedullary plasmacytoma is rare in patients with diagnosed multiple myeloma. Soft tissue plasmacytoma of the gallbladder is particularly uncommon and has been described in only a handful of cases. Diagnosis of gallbladder plasmacytoma with fluorine 18-fluorodeoxyglucose (F18-FDG) positron emission tomography/computed tomography (PET/CT) has not previously been reported. We present a 65-year-old female with a history of multiple myeloma who underwent a restaging F18-FDG-PET/CT which showed a focal area of hypermetabolic activity, corresponding to a nodular lesion within the posterior gallbladder wall...
2016: Journal of Clinical Imaging Science
Shotaro Shima, Tetsuro Toriumi, Yukihiro Nomura, Hajime Tamura, Minoru Hirano
A 68-year-old woman who presented with a left axillary mass was admitted. A computed tomography scan showed swelling ofthe left axillary and supraclavicular lymph nodes, but magnetic resonance imaging(MRI)and fluorodeoxyglucose positron emission tomography(FDG-PET)did not reveal these primary sites. Histological findings of the axillary mass revealed a HER2-positive adenocarcinoma. We diagnosed the patient with axillary nodal metastasis ofadenocarcinoma ofan unknown primary site and treated her with neoadjuvant chemotherapy including paclitaxel and trastuzumab followed by doxorubicin and cyclophosphamide...
October 2016: Gan to Kagaku Ryoho. Cancer & Chemotherapy
Supamas Danwittayakul, Supachai Songngam, Tipawan Fhulua, Panida Muangkasem, Sittha Sukkasi
Solar water disinfection (SODIS) is a simple point-of-use process that uses sunlight to disinfect water for drinking. Polyethylene terephthalate (PET) bottles are typically used as water containers for SODIS, but a new SODIS container design has recently been developed with low-density polyethylene (LDPE) bags and can overcome the drawbacks of PET bottles. Two nesting layers of LDPE bags are used in the new design: the inner layer containing the water to be disinfected and the outer one creating air insulation to minimize heat loss from the water to the surroundings...
October 19, 2016: Environmental Technology
Birendra P Sah, Bikram Sharma, Michael C Iannuzzi
We report a case of orbital sarcoidosis in a 66 year old male who presented with one month history of right eye swelling and intermittent diplopia. MRI revealed an enhancing infiltrative soft tissue mass in the inferior aspect of the right orbit and biopsy of the mass demonstrated non-necrotizing granulomas. Chest CT scan was normal and PET scan showed no other organ involvement. He was treated with tapering doses of prednisone over six months. Although relapse occurred while tapering prednisone to 20 mg per day, he responded well to the addition of azathioprine with complete resolution of visual difficulties and orbital the mass on repeat MRI...
October 7, 2016: Sarcoidosis, Vasculitis, and Diffuse Lung Diseases: Official Journal of WASOG
Caroline M Hostetler, Katherine Hinde, Nicole Maninger, Sally P Mendoza, William A Mason, Douglas J Rowland, Guobao B Wang, David Kukis, Simon R Cherry, Karen L Bales
Pair bonding leads to increases in dopamine D1 receptor (D1R) binding in the nucleus accumbens of monogamous prairie voles. In the current study, we hypothesized that there is similar up-regulation of D1R in a monogamous primate, the titi monkey (Callicebus cupreus). Receptor binding of the D1R antagonist [(11) C]-SCH23390 was measured in male titi monkeys using PET scans before and after pairing with a female. We found that within-subject analyses of pairing show significant increases in D1R binding in the lateral septum, but not the nucleus accumbens, caudate, putamen, or ventral pallidum...
October 18, 2016: American Journal of Primatology
Kayako Isohashi, Eku Shimosegawa, Sadahiro Naka, Yasukazu Kanai, Genki Horitsugi, Ikuko Mochida, Keiko Matsunaga, Tadashi Watabe, Hiroki Kato, Mitsuaki Tatsumi, Jun Hatazawa
BACKGROUND: In boron neutron capture therapy (BNCT), positron emission tomography (PET) with 4-borono-2-(18)F-fluoro-phenylalanine (FBPA) is the only method to estimate an accumulation of (10)B to target tumor and surrounding normal tissue after administering (10)B carrier of L-paraboronophenylalanine and to search the indication of BNCT for individual patient. Absolute concentration of (10)B in tumor has been estimated by multiplying (10)B concentration in blood during BNCT by tumor to blood radioactivity (T/B) ratio derived from FBPA PET...
December 2016: EJNMMI Research
Marcus Unterrainer, Norbert Galldiks, Bogdana Suchorska, Lara-Caroline Kowalew, Vera Wenter, Christine Schmid-Tannwald, Maximilian Niyazi, Peter Bartenstein, Karl-Josef Langen, Nathalie L Albert
PURPOSE: In patients with brain metastasis, PET using labeled amino acids has gained clinical importance, mainly regarding the differentiation of viable tumor tissue from treatment-related effects. However, there is still limited knowledge concerning the uptake characteristics in patients with newly diagnosed and untreated brain metastases. Hence, we evaluated the uptake characteristics in these patients using dynamic O-(2-(18)F-fluoroethyl)-L-tyrosine ((18)F-FET) positron-emission-tomography (PET)...
October 6, 2016: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
Sameer Bakhshi, Sainath Bhethanabhotla, Rakesh Kumar, Krishankant Agarwal, Punit Sharma, Sanjay Thulkar, Arun Malhotra, Deepa Dhawan, Sreenivas Vishnubhatla
BACKGROUND: Data about significance of (18)F-FDG positron emission tomography (PET) at interim assessment and end of treatment in pediatric Hodgkin lymphoma (HL) are limited. METHODS: Patients (≤18 years) with HL were prospectively evaluated with contrast-enhanced computed tomography (CECT) and PET combined with low-dose CT(PET-CT) at baseline, post 2 cycles of chemotherapy and post completion of treatment. Revised international working group criteria (RIW) and Deauville (DA) five point-scale for response assessment by PET-CT were used...
October 6, 2016: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
Evangelos A Russo, Sameer Khan, Ryan Janisch, Roger N Gunn, Eugenii A Rabiner, Stuart A Taylor, Paul M Matthews, Timothy R Orchard
BACKGROUND: Fluorine-fluorodeoxyglucose positron emission tomography (F-FDG PET) has recently attracted interest for the measurement of disease activity in Crohn's disease (CD). The aim of this study was to assess the utility of FDG-PET as a marker of progression of inflammatory activity and its response to treatment in patients with CD. METHODS: Twenty-two patients with active CD were recruited prospectively to undergo FDG-PET scanning at 2 time points. All 22 index scans were used to assess sensitivity and specificity against a reference standard magnetic resonance imaging measure...
November 2016: Inflammatory Bowel Diseases
Erdem Sürücü, Yusuf Demir, Ahmet C Dülger, Abdüssamed Batur, Şehmus Ölmez, Mehmet T Kitapçı
A 48-year-old female with complaints of gastrointestinal symptoms such as abdominal pain, fatigue, vomiting, nausea, and weight loss was diagnosed with neuroendocrine tumor after removal of a 2 mm lesion from the stomach with endoscopic biopsy. Her magnetic resonance imaging that was performed due to on-going symptoms showed multiple linear hypointense lesions in the liver. Positron emission tomography/computed tomography (PET/CT) scan was performed for differential diagnosis, which showed high fluorodeoxyglucose (FDG) uptake in these lesions...
October 5, 2016: Molecular Imaging and Radionuclide Therapy
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