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https://www.readbyqxmd.com/read/29351123/accuracy-of-18f-naf-pet-ct-in-bone-metastasis-detection-and-its-effect-on-patient-management-in-patients-with-breast-carcinoma
#1
Wouter A M Broos, Friso M van der Zant, Maurits Wondergem, Remco J J Knol
OBJECTIVE: Determination of the accuracy of sodium fluorine-18-fluoride (F-NaF) PET/computed tomography (CT) for the evaluation of bone metastases, and the impact on patient management in breast cancer patients. PATIENTS AND METHODS: Patients with breast cancer, referred for F-NaF PET/CT between February 2014 and June 2016, were included in a database. Baseline characteristics, clinical indication, definitive diagnosis according to follow-up data, as well as changes in patient management were recorded...
January 18, 2018: Nuclear Medicine Communications
https://www.readbyqxmd.com/read/29349358/95gtc-and-96gtc-as-alternatives-to-medical-radioisotope-99mtc
#2
Takehito Hayakawa, Yuichi Hatsukawa, Toru Tanimori
We studied 95gTc and 96gTc as alternatives to the medical radioisotope 99mTc. 96gTc (95gTc) can be produced by (p, n) reactions on an enriched 96Mo (95Mo) target with a proton beam provided by a compact accelerator such as a medical cyclotron that generate radioisotopes for positron emission tomography (PET). The γ-rays are measured with an electron-tracking Compton camera (ETCC). We calculated the relative intensities of the γ-rays from 95gTc and 96gTc. The calculated γ-ray intensity of a 96gTc (95gTc) nucleus is as high as 63% (70%) of that of a 99mTc nucleus...
January 2018: Heliyon
https://www.readbyqxmd.com/read/29348907/microsatellite-stability-and-mismatch-repair-proficiency-in-nasopharyngeal-carcinoma-may-not-predict-programmed-death-1-blockade-resistance
#3
Xiyi Liao, Liang Zhao, Sangang Wu, Hua Zheng, Haojun Chen, Huan Zhang, ZiJing Wang, Qin Lin
The US FDA granted accelerated approval to pembrolizumab for microsatellite instability-high and mismatch repair deficient cancers. The response of programmed death-1 blockade in mismatch repair proficiency (pMMR) colorectal cancer is very poor, however, whether such treatment is effective in pMMR nasopharyngeal carcinoma (NPC) remains unknown. We report a case of a 51-year-old man with NPC. PET-CT scan revealed a space-occupying lesion in the left lung, and the pathologic result confirmed the occupying lesion originated from NPC...
December 22, 2017: Oncotarget
https://www.readbyqxmd.com/read/29348317/head-to-head-comparison-of-11c-pbr28-and-18f-ge180-for-the-quantification-of-tspo-in-the-human-brain
#4
Paolo Zanotti-Fregonara, Belen Pascual, Gaia Rizzo, Meixiang Yu, Neha Pal, David Beers, Randall Carter, Stanley Appel, Nazem Atassi, Joseph Masdeu
Introduction:18F-GE180 is a third-generation positron emission tomography (PET) tracer to quantify the translocator protein TSPO, a biomarker for inflammation. The aim of this study was to compare head-to-head 18F-GE180 to the well-established translocator protein (TSPO) tracer 11C-PBR28, by scanning with either tracer during the same day in the same subjects. Materials and Methods: Five subjects underwent a 90-minute PET scan with 11C-PBR28 in the morning and 18F-GE180 in the afternoon. A metabolite-corrected arterial input function was obtained in each subject for both tracers, and the brain uptake was quantified with a two-tissue compartmental model...
January 18, 2018: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/29348315/whole-body-biodistribution-and-dosimetry-of-the-dopamine-transporter-radioligand-18f-fe-pe2i-in-human-subjects
#5
Helena Lizana, Lennart Johansson, Jan E Axelsson, Anne Larsson Strömvall, Mattias Ögren, Jan Linder, Christer Halldin, Andrea Varrone, Susanna Jakobson Mo
18F-(E)-N-(3-iodoprop-2-enyl)-2β-carbofluoroethoxy-3β-(4'-methyl-phenyl) nortropane (18F-FE-PE2I) was recently developed and has shown adequate affinity and high selectivity for the dopamine transporter (DAT). Previous studies have shown promising results for 18F-FE-PE2I as a suitable radioligand for DAT-imaging. In this study, we investigate the whole body biodistribution and dosimetry of 18F-FE-PE2I in healthy volunteers to support the utility of it as a suitable positron emission tomography (PET) imaging agent for the DAT...
January 18, 2018: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/29347968/18f-fdg-pet-ct-and-diffusion-weighted-mri-for-monitoring-a-braf-and-cdk-4-6-inhibitor-combination-therapy-in-a-murine-model-of-human-melanoma
#6
Ralf S Eschbach, Philipp M Kazmierczak, Maurice M Heimer, Andrei Todica, Heidrun Hirner-Eppeneder, Moritz J Schneider, Georg Keinrath, Olga Solyanik, Jessica Olivier, Wolfgang G Kunz, Maximilian F Reiser, Peter Bartenstein, Jens Ricke, Clemens C Cyran
BACKGROUND: The purpose of the study was to investigate a novel BRAF and CDK 4/6 inhibitor combination therapy in a murine model of BRAF-V600-mutant human melanoma monitored by 18F-FDG-PET/CT and diffusion-weighted MRI (DW-MRI). METHODS: Human BRAF-V600-mutant melanoma (A375) xenograft-bearing balb/c nude mice (n = 21) were imaged by 18F-FDG-PET/CT and DW-MRI before (day 0) and after (day 7) a 1-week BRAF and CDK 4/6 inhibitor combination therapy (n = 12; dabrafenib, 20 mg/kg/d; ribociclib, 100 mg/kg/d) or placebo (n = 9)...
January 18, 2018: Cancer Imaging: the Official Publication of the International Cancer Imaging Society
https://www.readbyqxmd.com/read/29346637/scleroderma-renal-crisis-and-cancer
#7
Colombe Crosnier, Aurélie Achille, Marie Lecouffe-Desprets, Antoine Néel, Cécile Durant, Christian Agard
We report two cases of elderly patients with diffuse systemic sclerosis (SSc) and inaugural scleroderma renal crisis (SRC). Initial exhaustive search for an underlying cancer was negative, but aggressive metastatic neoplasia was diagnosed after 1 year of follow-up. We emphasize the role of 18-FDG PET-scan to detect neoplasia in the following months after inaugural SRC in elderly.
January 15, 2018: QJM: Monthly Journal of the Association of Physicians
https://www.readbyqxmd.com/read/29346598/accuracy-of-preoperative-staging-for-a-priori-resectable-esophageal-cancer
#8
M Winiker, S Mantziari, S G Figueiredo, N Demartines, P Allemann, M Schäfer
This study assessed the accuracy of preoperative staging in patients undergoing oncological esophagectomy for adenocarcinoma and squamous cell carcinoma. All patients undergoing surgery for resectable esophageal cancer in a university hospital from 2005 to 2016 were identified from our institutional database. Patients with neoadjuvant treatment were excluded to avoid bias from down-staging effects. Routinely, all patients had an upper endoscopy with biopsy, a thoracoabdominal CT scan, an 18-FEG PET-CT, and endoscopic ultrasound...
January 1, 2018: Diseases of the Esophagus: Official Journal of the International Society for Diseases of the Esophagus
https://www.readbyqxmd.com/read/29346545/influence-of-nicotine-metabolism-ratio-on-11c-phno-pet-binding-in-tobacco-smokers
#9
Patricia Di Ciano, Rachel F Tyndale, Esmaeil Mansouri, Christian S Hendershot, Alan A Wilson, Dina Lagzdins, Sylvain Houle, Isabelle Boileau, Bernard Le Foll
Background: Identifying the biological basis of smoking cessation success is of growing interest. The rate of nicotine metabolism, measured by the nicotine metabolite ratio (NMR), affects multiple aspects of nicotine dependence. Fast nicotine metabolizers (FM) tend to smoke more, experience more withdrawal and craving and have lower cessation rates as compared to slow metabolizers (SM). The NMR predicts treatment response, and differences in brain activation between FM and SM have been reported in fMRI studies...
January 13, 2018: International Journal of Neuropsychopharmacology
https://www.readbyqxmd.com/read/29345517/pet-adapted-therapy-for-advanced-hodgkin-lymphoma-systematic-review
#10
Irina Amitai, Ronit Gurion, Liat Vidal, Eldad J Dann, Pia Raanani, Anat Gafter-Gvili
INTRODUCTION: Positron emission tomography-computed tomography (PET-CT) performed after two chemotherapy cycles (PET-2) has become an accepted prognostic tool in Hodgkin lymphoma (HL). We evaluated the effect of PET-adapted strategy on outcome in advanced stage HL. METHODS: In August 2017, we searched electronic databases, conference proceedings and ongoing trials. We included all studies in which treatment modification for advanced HL was performed based on the results of the interim PET scan...
January 18, 2018: Acta Oncologica
https://www.readbyqxmd.com/read/29345442/lung-uptake-of-fluorine-18-fluoroethyl-choline-pet-ct-in-patients-with-prostate-cancer
#11
Daniele A Pizzuto, Salvatore Annunziata, Francesco P Ieria, Carmelo Caldarella, Maria A Isgrò, Valerio Lanni, Gaia Bencivenga, Vittoria Rufini, Alessandro Giordano
BACKGROUND: Metastatic spreading to the lungs is a negative prognostic factor in patients with prostate cancer (PC). Aim of our study was to assess the prevalence of lung PC metastases in patients with fluorine-18 fluoroethyl-choline (F-18-FECh) PET-CT positive lung lesions and the role of Gleason Score (GS) and common biochemical markers in predicting metastatic spreading to the lungs. METHODS: We retrospectively evaluated the scans of 1283 patients ongoing (F-18-FECh) PET-CT for PC between May 2010 and July 2014...
January 17, 2018: Quarterly Journal of Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/29344923/potential-effects-of-low-dose-average-ct-on-cardiac-implantable-electronic-devices
#12
Emily Y Pan, Dershan Luo, Tinsu Pan
BACKGROUND: Average CT has been shown to be more accurate than conventional helical CT in quantitation of the PET data. The risk of CT irradiation of a cardiac implantable electronic device (CIED) causing an adverse event is low and is generally outweighed by the clinical benefit of a medically indicated examination. However, irradiation of CIED over one breath cycle in cine CT scan for average CT could impose risks on a patient who is pacing dependent. The purpose of this study was to demonstrate that low-dose average CT can be safe for CIED...
January 17, 2018: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/29344682/68ga-prostate-specific-membrane-antigen-psma-positron-emission-tomography-pet-for-primary-staging-of-high-risk-prostate-cancer-a-systematic-review
#13
Julia Corfield, Marlon Perera, Damien Bolton, Nathan Lawrentschuk
PURPOSE: To systematically review currently available data on 68Ga-prostate specific membrane antigen (PSMA) positron emission tomography (PET) used for the primary staging of high-risk prostate cancer. METHODS: We performed critical reviews of EMBASE, Web of Science (including MEDLINE) and Cochrane databases in October 2016 according to the Preferred Reporting Items for Systematic Review and Meta-analysis statement. We included studies that utilized 68Ga-PSMA PET for primary staging of prostate cancer...
January 17, 2018: World Journal of Urology
https://www.readbyqxmd.com/read/29344435/synchronous-uterine-metastases-from-breast-cancer-case-study-and-literature-review
#14
REVIEW
Aisha Akhtar, Atul Ratra, Yana Puckett, Abu Baker Sheikh, Catherine A Ronaghan
Breast cancer rarely metastasizes to the uterus. Here, we report two breast cancer patients with synchronous metastases to the uterus. Case 1 highlights a 46-year-old female with invasive ductal carcinoma who presented with a breast mass and was found to have uterine enlargement on positron emission tomography (PET) scan. Biopsy revealed a metastatic 4 mm focus of breast cancer in the background of endometrial hyperplasia. Case 2 reports a 62-year-old postmenopausal female diagnosed with lobular carcinoma of the breast following an abnormal screening mammogram...
November 13, 2017: Curēus
https://www.readbyqxmd.com/read/29344119/effect-of-lipodox-in-combination-with-bevacizumab-in-a-patient-with-a-metastatic-malignant-phyllodes-breast-tumor-a-case-report
#15
Chin Cheng Su, Chih-Jung Chen, Shou-Jen Kuo
A 76-year-old female patient with a malignant phyllodes tumor underwent modified radical mastectomy and wide excision. Multiple nodules were observed in the operated wound area. Positron emission tomography-computed tomography (PET-CT) revealed recurrent disease in the left breast, the adjacent left third rib, the left internal mammary region and the left ilium. A novel formulation of bevacizumab (5 mg/m2, first day) in combination with liposomal doxorubicin (Lipodox, 30 mg/m2, second day) was administered for 3 cycles every 2 weeks, and subsequently wide excision was performed...
December 2017: Oncology Letters
https://www.readbyqxmd.com/read/29343731/impact-of-tissue-kinetic-heterogeneity-on-pet-quantification-case-study-with-the-l-1-11c-leucine-pet-method-for-cerebral-protein-synthesis-rates
#16
Mattia Veronese, Alessandra Bertoldo, Giampaolo Tomasi, Carolyn Beebe Smith, Kathleen C Schmidt
Functional quantification with PET is generally based on modeling that assumes tissue regions are kinetically homogeneous. Even in regions sufficiently small to approach homogeneity, spillover due to resolution limitations of PET scanners may introduce heterogeneous kinetics into measured data. Herein we consider effects of kinetic heterogeneity at the smallest volume accessible, the single image voxel. We used L-[1-11C]leucine PET and compared rates of cerebral protein synthesis (rCPS) estimated voxelwise with methods that do (Spectral Analysis Iterative Filter, SAIF) and do not (Basis Function Method, BFM) allow for kinetic heterogeneity...
January 17, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29340986/comparison-of-maximal-rubidium-82-activities%C3%A2-for%C3%A2-myocardial-blood-flow-quantification-between-digital-and-conventional-pet-systems
#17
Joris D van Dijk, Pieter L Jager, Jochen A C van Osch, Maryam Khodaverdi, Jorn A van Dalen
BACKGROUND: PET-based myocardial blood flow (MBF) quantification can be inaccurate when using high tracer activities. Our aim was to derive the maximal Rubidium-82 activity for MBF assessment using a new digital PET system and compare the results with conventional analog systems. METHODS: 1.8 GBq Rubidium-82 was injected into the cardiac insert of an anthropomorphic torso phantom. Data were acquired for 10 min using an Ingenuity TF (Philips Healthcare), Discovery 690 (D690, GE Healthcare), and digital PET prototype system (Philips Healthcare)...
January 16, 2018: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/29340798/diagnostic-implications-of-a-small-voxel-reconstruction-for-loco-regional-lymph-node-characterization-in-breast-cancer-patients-using-fdg-pet-ct
#18
Daniëlle Koopman, Jorn A van Dalen, Hester Arkies, Ad H J Oostdijk, Anne Brecht Francken, Jos Bart, Cornelis H Slump, Siert Knollema, Pieter L Jager
BACKGROUND: We evaluated the diagnostic implications of a small-voxel reconstruction for lymph node characterization in breast cancer patients, using state-of-the-art FDG-PET/CT. We included 69 FDG-PET/CT scans from breast cancer patients. PET data were reconstructed using standard 4 × 4 × 4 mm3 and small 2 × 2 × 2 mm3 voxels. Two hundred thirty loco-regional lymph nodes were included, of which 209 nodes were visualised on PET/CT. All nodes were visually scored as benign or malignant, and SUVmax and TBratio(=SUVmax/SUVbackground) were measured...
January 16, 2018: EJNMMI Research
https://www.readbyqxmd.com/read/29340038/diagnostic-performance-of-68gallium-psma-11-pet-ct-to-detect-significant-prostate-cancer-and-comparison-with-18fec-pet-ct
#19
Manuela A Hoffmann, Matthias Miederer, Helmut J Wieler, Christian Ruf, Frank M Jakobs, Mathias Schreckenberger
Background: Radiolabeled prostate-specific membrane antigen (PSMA) has proven to be a highly accurate method to detect recurrence and metastases of prostate cancer, but only sparse data is available about its performance in the diagnosis of clinically significant primary prostate cancer. Methods: We compared 68Ga-PSMA-11 PET/CT in 25 patients with 18FEC PET/CT in 40 patients with suspected prostate carcinoma based on an increased PSA level.The PET/CT results were compared with the histopathologic Gleason Score (GS) of biopsies...
December 19, 2017: Oncotarget
https://www.readbyqxmd.com/read/29338024/quantitative-in-vivo-mapping-of-myocardial-mitochondrial-membrane-potential
#20
Nathaniel M Alpert, Nicolas Guehl, Leon Ptaszek, Matthieu Pelletier-Galarneau, Jeremy Ruskin, Moussa C Mansour, Dustin Wooten, Chao Ma, Kazue Takahashi, Yun Zhou, Timothy M Shoup, Marc D Normandin, Georges El Fakhri
BACKGROUND: Mitochondrial membrane potential (ΔΨm) arises from normal function of the electron transport chain. Maintenance of ΔΨm within a narrow range is essential for mitochondrial function. Methods for in vivo measurement of ΔΨm do not exist. We use 18F-labeled tetraphenylphosphonium (18F-TPP+) to measure and map the total membrane potential, ΔΨT, as the sum of ΔΨm and cellular (ΔΨc) electrical potentials. METHODS: Eight pigs, five controls and three with a scar-like injury, were studied...
2018: PloS One
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