نتایج جستجو برای: pet protocol

تعداد نتایج: 302524  

Journal: :Journal of nuclear medicine : official publication, Society of Nuclear Medicine 2014
Isabel Rauscher Matthias Eiber Sebastian Fürst Michael Souvatzoglou Stephan G Nekolla Sibylle I Ziegler Ernst J Rummeny Markus Schwaiger Ambros J Beer

UNLABELLED Fully integrated PET/MR imaging holds great promise as a novel hybrid imaging modality in oncology and might offer advantages to PET/CT in many instances, especially because of the superior soft-tissue contrast of MR imaging, compared with CT. However, lung metastases are a frequent finding in oncologic patients, and for imaging of the lung CT is still the modality of choice. Thus, w...

Journal: :Journal of nuclear medicine : official publication, Society of Nuclear Medicine 2005
Henning Boecker Till Sprenger Gjermund Henriksen Thomas R Toelle Mary E Spilker

UNLABELLED The tracer 6-O-(2-(18)F-fluoroethyl)-6-O-desmethyldiprenorphine (18F-FDPN) provides enhanced flexibility to PET studies of the opioidergic system because the label has a longer half-life than the label of 11C-diprenorphine. Here we evaluated the ideal length of PET studies with 18F-FDPN. METHODS 18F-FDPN binding kinetics were quantified with protocols of different lengths by use of...

2017
Gabrielle C. Colleran Neha Kwatra Leah Oberg Frederick D. Grant Laura Drubach Michael J. Callahan Robert D. MacDougall Frederic H. Fahey Stephan D. Voss

PET/CT plays an important role in the diagnosis, staging and management of many pediatric malignancies. The techniques for performing PET/CT examinations in children have evolved, with increasing attention focused on reducing patient exposure to ionizing radiation dose whenever possible and minimizing scan duration and sedation times, with a goal toward optimizing the overall patient experience...

2014
Clément Bailly Thomas Eugène Marie-Laure Couec Marion Strullu Eric Frampas Loïc Campion Françoise Kraeber-Bodéré Caroline Bodet-Milin

OBJECTIVE Burkitt lymphoma (BL) is a rare and aggressive form of B-cell lymphoma that is curable using intensive chemotherapy. Obtaining a complete response (CR) at the end of induction chemotherapy is a major prognostic factor. This study retrospectively evaluates the potential impact of (18)FDG-PET in the management of children with BL after induction chemotherapy, and the prognostic performa...

2014
Bekir Tasdemir Zeki Dostbil Ali Inal Kemal Unal Sule Yildirim F Selcuk Simsek

PURPOSE The aim of this study was to detect additional findings in whole body FDG-PET/CT scan including the brain, calvarium, and scalp (compared to starting from the base of the skull) in cancer patients and to determine contributions of these results to tumor staging and treatment protocols. MATERIALS AND METHODS We noted whether the findings related to the brain, calvarium, and scalp in 13...

Journal: :Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism 2010
Yoko Ikoma Hiroshi Watabe Takuya Hayashi Yoshinori Miyake Noboru Teramoto Kotaro Minato Hidehiro Iida

Positron emission tomography (PET) with [(11)C]raclopride has been used to investigate the density (B(max)) and affinity (K(d)) of dopamine D(2) receptors related to several neurological and psychiatric disorders. However, in assessing the B(max) and K(d), multiple PET scans are necessary under variable specific activities of administered [(11)C]raclopride, resulting in a long study period and ...

Journal: :Physica Medica 2021

Purpose To conduct a simplified lesion-detection task of low-dose (LD) PET-CT protocol for frequent lung screening using 30% the effective PETCT dose and to investigate feasibility increasing clinical value low-statistics scans machine learning. Methods We acquired 33 SD PET images, which 13 had actual LD (ALD) PET, simulated (SLD) images at seven different count levels from scans. employed ima...

Journal: :World Journal of Surgical Oncology 2007
Seza A Gulec Erica Hoenie Richard Hostetter Douglas Schwartzentruber

INTRODUCTION Parallel to the advances in diagnostic imaging using positron emission tomography (PET), and availability of new systemic treatment options, the treatment paradigm in oncology has shifted towards more aggressive therapeutic interventions to include cytoreductive techniques and metastasectomies. Intraoperative localization of PET positive recurrent/metastatic lesions can be facilita...

2014

This paper will deal mainly with the performance study and analysis statistical properties of the noise found in various PET images. The method is specifically designed for types of noise produced by acquisition and transmission sequence in PET images. Here signal fluctuations generally originate in the physical processes of imaging rather than in the tissue textures. Various types of noise (tr...

Journal: :American journal of respiratory and critical care medicine 2005
Gorka Bastarrika María José García-Velloso Maria Dolores Lozano Usua Montes Wenceslao Torre Natalia Spiteri Arantza Campo Luis Seijo Ana Belén Alcaide Jesús Pueyo David Cano Isabel Vivas Octavio Cosín Pablo Domínguez Patricia Serra José A Richter Luis Montuenga Javier J Zulueta

RATIONALE Lung cancer screening using computed tomography (CT) is effective in detecting lung cancer in early stages. Concerns regarding false-positive rates and unnecessary invasive procedures have been raised. OBJECTIVE To study the efficiency of a lung cancer protocol using spiral CT and F-18-fluorodeoxyglucose positron emission tomography (FDG-PET). METHODS High-risk individuals underwe...

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