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Ludmila S Almeida, Maidane C Araújo, Denise E Zantut-Wittmann, Lígia V Assumpção, Thiago F Souza, Cleide M Silva, Juliana L Argenton, Allan O Santos, Jair Mengatti, Celso D Ramos, Elba C Etchebehere
BACKGROUND: Radioiodine-refractory thyroid carcinomas (RAIRs) are characterized by reduced expression of sodium-iodine symporter, rising serum thyroglobulin levels, and negative whole-body radioiodine scans. Interestingly, RAIRs continue to express somatostatin receptors and can be identified with Ga-DOTATATE PET/CT imaging. OBJECTIVE: The objective of this study was to compare lesion detectability in Ga-DOTATATE PET/CT performed with elevated thyroid-stimulating hormone (eTSH) levels with suppressed thyroid-stimulating hormone (sTSH) levels...
March 14, 2018: Nuclear Medicine Communications
Hong Truong, Leonard G Gomella, Mathew L Thakur, Edouard J Trabulsi
PURPOSE: Current approaches to prostate cancer screening and diagnosis are plagued with limitations in diagnostic accuracy. There is a compelling need for biomolecular imaging that will not only detect prostate cancer early but also distinguish prostate cancer from benign lesions accurately. In this topic paper, we review evidence that supports further investigation of VPAC1-targeted PET/CT imaging in the primary diagnosis of prostate cancer. METHODS: A non-systematic review of Medline/PubMed was performed...
March 14, 2018: World Journal of Urology
Glen M Blake, Tanuj Puri, Musib Siddique, Michelle L Frost, Amelia E B Moore, Ignac Fogelman
Dynamic positron emission tomography (PET) imaging with fluorine-18 labelled sodium fluoride ([18 F]NaF) allows the quantitative assessment of regional bone formation by measuring the plasma clearance of fluoride to bone at any site in the skeleton. Today, hybrid PET and computed tomography (CT) dual-modality systems (PET/CT) are widely available, and [18 F]NaF PET/CT offers a convenient non-invasive method of studying bone formation at the important osteoporotic fracture sites at the hip and spine, as well as sites of pure cortical or trabecular bone...
February 2018: Quantitative Imaging in Medicine and Surgery
Mads Ryø Jochumsen, Michael Alle Madsen, Lise Gammelgaard, Kirsten Bouchelouche
A 75-year-old man with recently diagnosed high-risk prostate cancer was referred for primary staging with Ga-prostate-specific membrane antigen (PSMA) PET/CT. The scan revealed intense Ga-PSMA uptake in a lumbar osteophyte on the right side of level L2/L3, whereas several other spinal osteophytes showed no Ga-PSMA uptake. MRI findings in the L3 vertebra was consistent with a benign Modic type 1 lesion, but MRI showed no signs of malignancy in the osteophyte with high Ga-PMSA uptake. This case presents an osteophyte as an addition to the list of potential benign pitfalls to be aware of when interpreting Ga-PSMA PET/CT...
March 13, 2018: Clinical Nuclear Medicine
Yan Xiu, Jie Zhang, Hongcheng Shi
A 73-year-old man presented with fatigue and anorexia and underwent FDG PET/CT scan to evaluate a right lung nodule revealed by a chest CT. The FDG PET/CT not only showed that the lung nodule was hypermetabolic but also revealed that there was significantly increased activity in the region of the duodenum. The findings were suspected as primary duodenal malignancy with metastases. However, an upper gastrointestinal tract endoscopic examination with further culture led to a diagnosis of duodenal cryptococcosis...
March 13, 2018: Clinical Nuclear Medicine
Christian Filss, Alexander Heinzel, Berthold Miiller, Andreas T J Vogg, Karl-Josef Langen, Felix M Mottaghy
AIM: In metastatic prostate cancer patients PSMA targeting radioligands have gained significant impact as theranostic probes. In this study a correlation between total tumor volume (TTV) and measured kidney dose as well as salivary glands (SG) uptake in177 Lu-PSMA-617 therapy was evaluated. METHODS: Eleven consecutive prostate cancer patients receiving a first cylcle of177 Lu-PSMA-617 (administered activity of approximately 6GBq) were included. The68 Ga-PSMA-11 PET/CT scan previous to therapy was used to determine TTV and SG uptake (glandulae submandibularis) employing PMOD version 3...
February 2018: Nuklearmedizin. Nuclear Medicine
Tuerhongjiang Tuxun, Shadike Apaer, Hai-Zhang Ma, Jin-Ming Zhao, Ren-Yong Lin, Tuerganaili Aji, Ying-Mei Shao, Hao Wen
Fluorodeoxyglucose (FDG) uptake by alveolar echinococcosis (AE) liver lesions is a signal of their metabolic activity and of disease progression. In order to find a surrogate marker for this status, we investigated whether parameters of the peripheral and/or periparasitic immune responses were associated with metabolic activity in a prospective case-control study of 30 AE patients and 22 healthy controls. Levels of 18 cytokines and chemokines, representative of innate and adaptive immune responses, were assessed in plasma and peripheral cells of two groups of patients with (MAAE) and without (MIAE) metabolically active lesions, and in the liver of MAAE patients...
March 13, 2018: Scientific Reports
Hisanori Fukunaga, Yasuko Tatewaki, Tatsushi Mutoh, Hideo Shimomura, Shuzo Yamamoto, Chiaki Terao, Tomoko Totsune, Manabu Nakagawa, Yasuyuki Taki
BACKGROUND Primary cardiac lymphoma is rare and can be an aggressive disease, depending on the grade. A case is reported of low-grade primary cardiac lymphoma associated with a pericardial effusion. 18F-fluorodeoxyglucose positron emission tomography and computed tomography (FDG-PET/CT) imaging was useful in the diagnosis and in evaluating the disease activity in this case. CASE REPORT A 72-year-old Japanese woman visited a general practitioner, complaining of dyspnea associated with cardiac tamponade. Pericardiocentesis was performed, and Group V malignant cells were identified by cytology, suspicious for malignant lymphoma...
March 14, 2018: American Journal of Case Reports
Gamze Tatar, Tevfik F Cermik, Yesim Karagoz, Cihan Gundogan, Didem Karacetin, Elif Yildiz, Ozgur Yigit
PURPOSE: This study aimed to determine whether intravenous contrast-enhanced dual-phase fluorine-18--fluorodeoxyglucose (F-FDG) PET/CT scans provide additional diagnostic information compared with the MRI/CT in patients with laryngeal carcinoma during the initial staging. PATIENTS AND METHODS: Forty-five consecutive patients (44 men, one woman; mean age±SD, 67.0±9.0 years, range: 45-80 years) with carcinoma of the larynx who had MRI/CT and intravenous contrast-enhanced PET/CT were enrolled...
April 2018: Nuclear Medicine Communications
Diego Z Carvalho, Erik K St Louis, David S Knopman, Bradley F Boeve, Val J Lowe, Rosebud O Roberts, Michelle M Mielke, Scott A Przybelski, Mary M Machulda, Ronald C Petersen, Clifford R Jack, Prashanthi Vemuri
Importance: Aging is associated with excessive daytime sleepiness (EDS), which has been linked to cognitive decline in the elderly. However, whether EDS is associated with the pathologic processes of Alzheimer disease remains unclear. Objective: To investigate whether EDS at baseline is associated with a longitudinal increase in regional β-amyloid (Aβ) accumulation in a cohort of elderly individuals without dementia. Design, Setting, and Participants: This prospective analysis included participants enrolled in the Mayo Clinic Study of Aging, a longitudinal population-based study in Olmsted County, Minnesota...
March 12, 2018: JAMA Neurology
Joan Fledelius, Anne Winther-Larsen, Azza A Khalil, Karin Hjorthaug, Jørgen Frøkiær, Peter Meldgaard
We evaluated whether changes in18 F-Fluoro-D-Glucose (18 F-FDG)-uptake evaluated early during erlotinib treatment predict survival in non-small cell lung cancer (NSCLC) patients. Positron emission tomography (PET)/CT scans from 56 NSCLC patients before and after 7-10 days of erlotinib treatment were analyzed with four different methods: Visual evaluation and percentage change in lean body mass corrected standardized uptake values (SULs): SULpeak , SULmax and total lesion glycolysis (TLG). The semi-quantitative parameters abilities to predict progression free survival (PFS) and overall survival (OS) were compared and we found that percentage change in SULpeak , SULmax and TLG all correlated with PFS and OS with the strongest correlation found for TLG (R=0...
2018: American Journal of Nuclear Medicine and Molecular Imaging
Liping Fu, Linwen Liu, Jinming Zhang, Baixuan Xu, Yong Fan, Jiahe Tian
The aim of this study was to identify the brain networks from early-phase11 C-PIB (perfusion PIB, pPIB) data and to compare the brain networks of patients with differentiating Alzheimer's disease (AD) with cognitively normal subjects (CN) and of mild cognitively impaired patients (MCI) with CN. Forty participants (14 CN, 12 MCI, and 14 AD) underwent11 C-PIB and18 F-FDG PET/CT scans. Parallel independent component analysis (pICA) was used to identify correlated brain networks from the11 C-pPIB and18 F-FDG data, and a two-sample t -test was used to evaluate group differences in the corrected brain networks between AD and CN, and between MCI and CN...
2018: Contrast Media & Molecular Imaging
Lina Xu, Giles Tetteh, Jana Lipkova, Yu Zhao, Hongwei Li, Patrick Christ, Marie Piraud, Andreas Buck, Kuangyu Shi, Bjoern H Menze
The identification of bone lesions is crucial in the diagnostic assessment of multiple myeloma (MM).68 Ga-Pentixafor PET/CT can capture the abnormal molecular expression of CXCR-4 in addition to anatomical changes. However, whole-body detection of dozens of lesions on hybrid imaging is tedious and error prone. It is even more difficult to identify lesions with a large heterogeneity. This study employed deep learning methods to automatically combine characteristics of PET and CT for whole-body MM bone lesion detection in a 3D manner...
2018: Contrast Media & Molecular Imaging
Min Liu, Lingxiao Cheng, Yuchen Jin, Maomei Ruan, Shiwei Sheng, Libo Chen
The quantitative relationship between iodine and glucose metabolism in metastases from differentiated thyroid cancer (DTC) remains unknown. Aim of the prospective study was to establish the value of18 F-FDG PET/CT in predicting131 I-avidity of metastases from DTC before the first radioiodine therapy. A total of 121 postoperative DTC patients with elevated stimulated serum thyroglobulin (ssTg) who underwent131 I adjuvant therapy or therapy after18 F-FDG PET/CT scan were enrolled. The Receiver operating characteristic curve was established to create an optimal cut-off point and evaluate the value of SUVmax for predicting131 I-avidity...
March 12, 2018: Scientific Reports
Ruth Ec Evans, Stuart A Taylor, Sandra Beare, Steve Halligan, Alison Morton, Alf Oliver, Andrea Rockall, Anne Miles
OBJECTIVE: To evaluate perceived patient burden and acceptability of whole body MRI (WB-MRI) compared to standard staging investigations, and identify predictors of reduced tolerance.  Methods: Patients recruited to multi-centre trials comparing WB-MRI with standard staging scans for lung and colorectal cancer were invited to complete two questionnaires: a baseline questionnaire at recruitment, measuring demographics, comorbidities, and distress; and a follow-up questionnaire after staging, measuring recovery time, comparative acceptability/satisfaction between WB-MRI and CT (colorectal cancer) and PET-CT (lung cancer), and perceived scan burden (scored 1 low to 7 high)...
March 12, 2018: British Journal of Radiology
Ray Y Chen, Laura E Via, Lori E Dodd, Gerhard Walzl, Stephanus T Malherbe, André G Loxton, Rodney Dawson, Robert J Wilkinson, Friedrich Thienemann, Michele Tameris, Mark Hatherill, Andreas H Diacon, Xin Liu, Jin Xing, Xiaowei Jin, Zhenya Ma, Shouguo Pan, Guolong Zhang, Qian Gao, Qi Jiang, Hong Zhu, Lili Liang, Hongfei Duan, Taeksun Song, David Alland, Michael Tartakovsky, Alex Rosenthal, Christopher Whalen, Michael Duvenhage, Ying Cai, Lisa C Goldfeder, Kriti Arora, Bronwyn Smith, Jill Winter, Clifton E Barry Iii
Background : By the early 1980s, tuberculosis treatment was shortened from 24 to 6 months, maintaining relapse rates of 1-2%. Subsequent trials attempting shorter durations have failed, with 4-month arms consistently having relapse rates of 15-20%. One trial shortened treatment only among those without baseline cavity on chest x-ray and whose month 2 sputum culture converted to negative. The 4-month arm relapse rate decreased to 7% but was still significantly worse than the 6-month arm (1.6%, P<0.01).  We hypothesize that PET/CT characteristics at baseline, PET/CT changes at one month, and markers of residual bacterial load will identify patients with tuberculosis who can be cured with 4 months (16 weeks) of standard treatment...
November 6, 2017: Gates Open Res
Lirong Yan, Collin Y Liu, Koon-Pong Wong, Sung-Cheng Huang, Wendy J Mack, Kay Jann, Giovanni Coppola, John M Ringman, Danny J J Wang
Autosomal dominant Alzheimer's disease (ADAD) is a small subset of Alzheimer's disease that is genetically determined with 100% penetrance. It provides a valuable window into studying the course of pathologic processes that leads to dementia. Arterial spin labeling (ASL) MRI is a potential AD imaging marker that non-invasively measures cerebral perfusion. In this study, we investigated the relationship of cerebral blood flow measured by pseudo-continuous ASL (pCASL) MRI with measures of cerebral metabolism (FDG PET) and amyloid deposition (Pittsburgh Compound B (PiB) PET)...
2018: NeuroImage: Clinical
Seok Jong Chung, Han Soo Yoo, Jungsu S Oh, Jae Seung Kim, Byoung Seok Ye, Young H Sohn, Phil Hyu Lee
INTRODUCTION: To investigate the relationship between the sub-regional pattern of striatal dopamine depletion and cognitive impairment in early-stage Parkinson's disease (PD), and determine the effect of striatal dopamine density on cognitive prognosis. METHODS: Patients with drug-naïve non-demented PD were divided into mild cognitive impairment (PD-MCI; n = 129) and cognitively normal (PD-CogN; n = 182) groups. Using quantification of the dopamine transporter (DAT) availability in each striatal sub-region with18 F-FP-CIT PET scans, we performed inter-group comparative analysis of DAT availability and multivariate linear regression analysis to assess the association between DAT availability and cognitive performance...
March 2, 2018: Parkinsonism & related Disorders
Tomislav A Zrnc, Jürgen Wallner, Wolfgang Zemann, Mauro Pau, Christian Gstettner, Luka Brcic, Alexandre T Assaf, Hamid Hassanzadeh, Matthias Feichtinger, Katja Schwenzer-Zimmerer
OBJECTIVES: Determination of tumor margins in patients with squamous cell carcinoma of the head and neck (SCCHN) is mostly based on preoperative magnetic resonance imaging (MRI) or computed tomography scans (CT). Local recurrence of disease is often correlated with the presence of positive resection margins after surgical treatment. Positron emission tomography/computed tomography (PET/CT) imaging plays a crucial role in the assessment of patients with SCCHN. The purpose of this study was to determine whether PET/CT could predict tumor extension...
February 19, 2018: Journal of Cranio-maxillo-facial Surgery
Vladimir Kepe, Claudio Scafoglio, Jie Liu, William H Yong, Marvin Bergsneider, Sung-Cheng Huang, Jorge R Barrio, Ernest M Wright
A novel glucose transporter, the sodium glucose cotransporter 2 (SGLT2), has been demonstrated to contribute to the demand for glucose by pancreatic and prostate tumors, and its functional activity has been imaged using a SGLT specific PET imaging probe, α-methyl-4-[F-18]fluoro-4-deoxy-D-glucopyaranoside (Me-4FDG). In this study, Me-4FDG PET was extended to evaluate patients with high-grade astrocytic tumors. Me-4FDG PET scans were performed in four patients diagnosed with WHO Grade III or IV astrocytomas and control subjects, and compared with 2-deoxy-2-[F-18]fluoro-D-glucose (2-FDG) PET and magnetic resonance imaging (MRI) of the same subjects...
March 10, 2018: Journal of Neuro-oncology
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