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https://www.readbyqxmd.com/read/29904808/the-value-of-99m-tc-maa-spect-ct-for-lung-shunt-estimation-in-90-y-radioembolization-a-phantom-and-patient-study
#1
Jonathan D Allred, Jeremy Niedbala, Justin K Mikell, Dawn Owen, Kirk A Frey, Yuni K Dewaraja
BACKGROUND: A major toxicity concern in radioembolization therapy of hepatic malignancies is radiation-induced pneumonitis and sclerosis due to hepatopulmonary shunting of 90 Y microspheres. Currently, 99m Tc macroaggregated albumin (99m Tc-MAA) imaging is used to estimate the lung shunt fraction (LSF) prior to treatment. The aim of this study was to evaluate the accuracy/precision of LSF estimated from 99m Tc planar and SPECT/CT phantom imaging, and within this context, to compare the corresponding LSF and lung-absorbed dose values from 99m Tc-MAA patient studies...
June 15, 2018: EJNMMI Research
https://www.readbyqxmd.com/read/29903564/nuclear-medicine-imaging-in-the-dentomaxillofacial-region
#2
REVIEW
Heidi R Wassef, Patrick M Colletti
Nuclear medicine studies evaluate physiology on a molecular level providing earlier detection of lesions before morphologic change is evident. 99m Tc-MDP and 18 F-fluoride bone scans detect osteomyelitis earlier than radiographs and computed tomography (CT); aid in diagnosis of temporomandibular joint disorder; and evaluate activity of condylar hyperplasia, extent of Paget disease, and viability of bone grafts. 18 F-FDG PET/CT distinguish between soft tissue and bone infections and diagnose osteomyelitis complicated by fracture or surgery...
July 2018: Dental Clinics of North America
https://www.readbyqxmd.com/read/29848817/breast-cancer-and-gastrointestinal-metastasis-a-case-report-and-review-of-the-literature
#3
Alessandra Invento, Sara Mirandola, Francesca Pellini, Giovanni Paolo Pellino, Daniela Grigolato
INTRODUCTION: Invasive lobular cancer (ILC) is the second most common type of a heterogeneous group of different histological types of invasive breast carcinoma. Breast cancer can metastatize anywhere, the most common sites are bones, liver, lungs and brain. Gastrointestinal tract (GI) metastases observed in autopsy studies account for about 6% to 18% of the overall metastases from breast cancer. OBJECTIVE: We describe a 54-year old woman with recurrent ILC in the contralateral breast...
2018: Annali Italiani di Chirurgia
https://www.readbyqxmd.com/read/29797211/use-of-99m-tc-sestamibi-spect-ct-when-conventional-imaging-studies-are-negative-for-localizing-suspected-recurrence-in-differentiated-thyroid-cancer-a-method-and-a-lesson-for-clinical-management
#4
Di Wu, Dorina Ylli, Cristiane J Gomes Lima, Wen Lee, Kenneth D Burman, Leonard Wartofsky, Douglas Van Nostrand
PURPOSE: The detection of recurrent disease in differentiated thyroid cancer (DTC) patients with elevated or rising serum thyroglobulin (Tg) levels and multiple negative conventional imaging studies can be challenging, especially when 18 F-FDG PET/CT scan is also negative. We report a patient and review the literature on the diagnostic use of 99m Tc-sestamibi scans to identify the source of elevated or rising Tg in patients with negative conventional imaging including negative 18 F-FDG PET/CT scans...
May 24, 2018: Endocrine
https://www.readbyqxmd.com/read/29794945/brain-correlates-of-mental-stress-induced-myocardial-ischemia
#5
J Douglas Bremner, Carolina Campanella, Zehra Khan, Majid Shah, Muhammad Hammadah, Kobina Wilmot, Ibhar Al Mheid, Bruno B Lima, Ernest V Garcia, Jonathon Nye, Laura Ward, Michael H Kutner, Paolo Raggi, Brad D Pearce, Amit Shah, Arshed Quyyumi, Viola Vaccarino
OBJECTIVE: Coronary artery disease (CAD) is a major cause of morbidity and mortality, and despite important advances in our understanding of this disorder, the underlying mechanisms remain under investigation. Recently, increased attention has been placed to the role of behavioral factors like emotional stress on CAD risk. Brain areas involved in memory and the stress response, including medial prefrontal cortex, insula and parietal cortex, also have outputs to the peripheral cardiovascular system...
May 24, 2018: Psychosomatic Medicine
https://www.readbyqxmd.com/read/29783202/feasibility-of-myocardial-pet-imaging-using-a-benzylguanidine-analog-meta-3-18-f-fluoropropyl-benzylguanidine-18-f-mfpbg
#6
Sang-Keun Woo, Byung Seok Moon, Bom Sahn Kim, Min Hwan Kim, Yong Jin Lee, Jae Ho Jung, Kyo Chul Lee, Youngho Seo, Wook Kim, Sang Moo Lim, Byung Chul Lee, Sang Eun Kim
INTRODUCTION: Global and regional sympathetic activity in the heart can be evaluated using [123 I]meta-iodobenzylguanidine ([123 I]mIBG) imaging. However, [123 I]mIBG is associated with low image spatial resolution and sensitivity in cardiac imaging. We investigated the capability of an F-18-labeled mIBG derivative, meta-(3-[18 F]fluoropropyl)benzylguanidine ([18 F]mFPBG), for identifying ischemic and viable myocardium in a rat model of myocardial infarction. MATERIALS AND METHODS: The ex vivo biodistribution and in vivo metabolic stability of [18 F]mFPBG were investigated in Sprague-Dawley rats...
May 3, 2018: Nuclear Medicine and Biology
https://www.readbyqxmd.com/read/29778807/-18-f-fluoride-pet-ct-and-99m-tc-mdp-spect-ct-can-detect-bone-cancer-at-early-stage-in-rodents
#7
Christiano R R Alves, Daniele de P Faria, Camila de G Carneiro, Alexandre T Garcez, Vanessa P Gutierrez, Willian das Neves, Ney R de Almeida, Yara Cury, Roger Chammas, Patricia C Brum
Noninvasive imaging using positron emission tomography/computed tomography (PET/CT) and single photon emission computed tomography/computed tomography (SPECT/CT) are considered revolutionized approaches to detect bone cancer. Both PET/CT and SPECT/CT technologies have advanced to permit miniaturization, which has provided the advantage of including animals as their own controls in longitudinal studies. The present study was designed to evaluate the potential of PET/CT and SPECT/CT as research tools to detect bone cancer in rats...
May 17, 2018: Life Sciences
https://www.readbyqxmd.com/read/29771718/evaluation-of-drug-effects-on-cerebral-blood-flow-and-glucose-uptake-in-un-anesthetized-and-un-stimulated-rats-application-of-free-moving-apparatus-enabling-to-keep-rats-free-during-pet-spect-tracer-injection-and-uptake
#8
Taku Sugita, Yusuke Kondo, Seigo Ishino, Ikuo Mori, Takashi Horiguchi, Mikako Ogawa, Yasuhiro Magata
OBJECTIVES: The purpose of this study is the development of novel fluorine-18-fluorodeoxyglucose (F-FDG)-PET and Tc-hexamethylpropylene amine oxime (HMPAO) SPECT methods with free-moving apparatus on conscious rats to investigate brain activity without the effects of anesthesia and tactual stimulation. We also assessed the sensitivity of the experimental system by an intervention study using fluoxetine as a reference drug. MATERIALS AND METHODS: A catheter was inserted into the femoral vein and connected to a free-moving cannula system...
May 15, 2018: Nuclear Medicine Communications
https://www.readbyqxmd.com/read/29764036/-comparison-of-prognostic-value-of-18-f-fdg-pet-ct-myocardial-metabolism-imaging-and-coronary-collateral-circulation-in-patients-with-cto-lesions
#9
G Y Zhai, J L Wang, Y Y Liu, Y J Zhou
Objective: To evaluate the location, extent of viable myocardial of chronic total coronary occlusions(CTO)lesions by (18)F-FDG PET myocardial metabolism imaging and then compare with coronary collateral circulation(CCC) to evaluate the prognostic evaluation in patients with CTO lesions. Methods: A total of Sixty consecutive patients with CTO lesions referred for viability assessment from April 2016 to April 2017 in Department of Cardiology, Beijing Anzhen Hospital were included in the study. These patients underwent (99m)Tc-sestamibi ECG-gated SPECT rest myocardial perfusion imaging and ECG-gated (18)F-FDG PET/CT myocardial metabolic imaging, as well as coronary arteriography were recruited in this study...
May 8, 2018: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/29742598/unicentric-castleman-s-disease-revealed-by-18f-fdg-pet-ct-and-somatostatin-receptor-scintigraphy-with-99mtc-hynic-toc
#10
Yaping Luo, Ling Wang, Qingqing Pan, Yanru Ma, Fang Li
A 51-year-old woman with a history of hypertension and abdominal pain was found with a retroperitoneal mass. The mass had intense enhancement in contrast-enhanced CT, and it showed a moderate degree of increased FDG uptake in PET/CT. The mass was also positive in somatostatin receptor scintigraphy with Tc-HYNIC-TOC, but it was negative in I-MIBG scan. The histopathological result after surgical resection of the mass confirmed the diagnosis of Castleman's disease, the hyaline vascular variant.
May 7, 2018: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/29736155/noninferiority-of-99m-tc-ethylenedicysteine-glucosamine-as-an-alternative-analogue-to-18-f-fluorodeoxyglucose-in-the-detection-and-staging-of-non-small-cell-lung-cancer
#11
Dong Dai, F David Rollo, Jerry Bryant, E Edmund Kim
Objective. 99m Tc-ethylenedicysteine-glucosamine (99m Tc-EC-G) was developed as a potential alternative to 18 F-FDG for cancer imaging. A Phase 2 study was conducted to compare 18 F-FDG PET/CT and 99m Tc-EC-G SPECT/CT in the detection and staging of patients with non-small cell lung cancer (NSCLC). This study was aimed to demonstrate that 99m Tc-EC-G SPECT/CT was not inferior to 18 F-FDG PET/CT in patients with confirmed NSCLC. Methods. Seventeen patients with biopsy proven NSCLC were imaged with 99m Tc-EC-G and 18 F-FDG to detect and stage their cancers...
2018: Contrast Media & Molecular Imaging
https://www.readbyqxmd.com/read/29724418/acr-appropriateness-criteria-%C3%A2-pretreatment-staging-of-muscle-invasive-bladder-cancer
#12
Christian B van der Pol, V Anik Sahni, Steven C Eberhardt, Aytekin Oto, Oguz Akin, Lauren F Alexander, Brian C Allen, Fergus V Coakley, Adam T Froemming, Pat F Fulgham, Keyanoosh Hosseinzadeh, Jodi K Maranchie, Rekha N Mody, Nicola Schieda, David M Schuster, Aradhana M Venkatesan, Carolyn L Wang, Mark E Lockhart
Muscle-invasive bladder cancer (MIBC) has a tendency toward urothelial multifocality and is at risk for local and distant spread, most commonly to the lymph nodes, bone, lung, liver, and peritoneum. Pretreatment staging of MIBC should include imaging of the urothelial upper tract for synchronous lesions; imaging of the chest, abdomen, and pelvis for metastases; and MRI pelvis for local staging. CT abdomen and pelvis without and with contrast (CT urogram) is recommended to assess the urothelium and abdominopelvic organs...
May 2018: Journal of the American College of Radiology: JACR
https://www.readbyqxmd.com/read/29719480/nuclear-medicine-in-prostate-cancer-a-new-era-for-radiotracers
#13
REVIEW
Vincenzo Cuccurullo, Giuseppe Danilo Di Stasio, Luigi Mansi
Natural history of prostate cancer (PCa) is extremely variable, as it ranges from indolent and slow growing tumors to highly aggressive histotypes. Genetic background and environmental factors co-operate to the genesis and clinical manifestation of the tumor and include among the others race, family, specific gene variants (i.e., BRCA1 and BRCA2 mutations), acute and chronic inflammation, infections, diet and drugs. In this scenario, remaining actual the clinical interest of bone scan (BS) in detecting skeletal metastases, an important role in diagnostic imaging may be also carried out by, positron emission tomography/computed tomography (PET/CT) and PET/magnetic resonance imaging (PET/MRI), which combine morphological information provided by CT and MRI with functional and metabolic data provided by PET acquisitions...
April 2018: World Journal of Nuclear Medicine
https://www.readbyqxmd.com/read/29705152/evaluation-of-diffuse-large-b-cell-lymphoma-patients-with-64-slice-multidetector-computed-tomography-versus-18-fdg-positron-emission-tomography-computed-tomography-in-initial-staging-and-restaging-after-treatment
#14
Nieves Gómez León, Gema Vega, Beatriz Rodríguez-Vigil Junco, Carlos Suevos Ballesteros
BACKGROUND AND OBJECTIVES: To prospectively compare the accuracy in initial staging and end-of-treatment restaging of diffuse large B-cell lymphoma (DLBCL) between 64-slice multidetector computed tomography (64MDCT) and 18FDG positron emission tomography/computed tomography (18FGD PET/CT) with intravenous contrast injection. MATERIAL AND METHODS: Randomised and blind controlled clinical multicentric trial that included biopsy-proven DLBCL patients. Seventy-two patients from five different hospitals in the region of Madrid, Spain, were enrolled in the study between January 2012 and June 2015...
April 25, 2018: Medicina Clínica
https://www.readbyqxmd.com/read/29700129/regional-myocardial-perfusion-disturbance-in-experimental-chronic-chagas-cardiomyopathy
#15
Luciano F L Oliveira, James T Thackeray, José A Marin Neto, Minna M D Romano, Eduardo E V Carvalho, Jorge Mejia, Denise M Tanaka, Grace K Silva, Douglas R Abdalla, Carlos Malamut, Frank M Bengel, Maria L Higuchi, André Schmidt, Edécio Cunha-Neto, Marcus V Simões
Background: Altered myocardial perfusion is a common finding in chronic Chagas cardiomyopathy (CCC), but its underlying histologic changes have not been elucidated. We investigated the occurrence of myocardial perfusion defects (MPD) and the correlated regional changes to histology in an experimental model of CCC in hamsters. Methods: Female Syrian hamsters ( n = 34) were infected with 3.5x104 to 105 trypomastigote forms of T. cruzi Y-strain and 6 to 10 months afterwards were submitted to in vivo imaging including: rest 99m Tc-sestamibi SPECT imaging, segmental and global left ventricular (LV) function assessment by using 2D-echocardiogram, and 18 F-FDG PET for evaluation of myocardial viability...
April 26, 2018: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/29689381/on-the-use-of-superparamagnetic-hydroxyapatite-nanoparticles-as-an-agent-for-magnetic-and-nuclear-in-vivo-imaging
#16
Alessio Adamiano, Michele Iafisco, Monica Sandri, Martina Basini, Paolo Arosio, Tamara Canu, Giovanni Sitia, Antonio Esposito, Vincenzo Iannotti, Giovanni Ausanio, Eirini Fragogeorgi, Maritina Rouchota, George Loudos, Alessandro Lascialfari, Anna Tampieri
The identification of alternative biocompatible magnetic NPs for advanced clinical application is becoming an important need due to raising concerns about iron accumulation in soft issues associated to the administration of superparamagnetic iron oxide nanoparticles (NPs). Here, we report on the performance of previously synthetized iron-doped hydroxyapatite (FeHA) NPs as contrast agent for magnetic resonance imaging (MRI). The MRI contrast abilities of FeHA and Endorem® (dextran coated iron oxide NPs) were assessed by 1 H nuclear magnetic resonance relaxometry and their performance in healthy mice was monitored by a 7 Tesla scanner...
April 21, 2018: Acta Biomaterialia
https://www.readbyqxmd.com/read/29667600/is-eye-lens-dosimetry-needed-in-nuclear-medicine
#17
M Wrzesień, L Królicki, Ł Albiniak, J Olszewski
INTRODUCTION: The exact level of exposure experienced by nuclear medicine personnel, whose work often requires performing manual procedures involving radioactive isotopes, is associated with the form of radiation source used. The variety of radionuclides and medical procedures, and the yearly increase in the number of patients, as well as the change of the individual dose limit for the lens of the eye from a value of 150 mSv yr-1 to 20 mSv yr-1 , mean that issues of eye lens routine dosimetry become interesting from the radiation protection point of view...
June 2018: Journal of Radiological Protection: Official Journal of the Society for Radiological Protection
https://www.readbyqxmd.com/read/29659390/combined-18f-fluoroethylcholine-pet-ct-and-99mtc-macroaggregated-albumin-spect-ct-predict-survival-in-patients-with-intermediate-stage-hepatocellular-carcinoma
#18
Markus Hartenbach, Stefan Weber, Magdalena Pilz, Sabrina Hartenbach, Mathias J Zacherl, Philipp M Paprottka, Reinhold Tiling, Peter Bartenstein, Marcus Hacker, Alexander R Haug, Nathalie L Albert
AIM: The aim of this study was to retrospectively analyze the prognostic value of combined Tc-macroaggregated albumin (MAA) SPECT/CT and [F]-fluoroethylcholine (FEC) PET/CT before radioembolization for survival of patients with intermediate-stage hepatocellular carcinoma. METHODS: Twenty-four patients with known hepatocellular carcinoma Barcelona Clinic Liver Cancer stage B were eligible for this analysis. All patients were scheduled for radioembolization and received a pretherapeutic [F]FEC PET/CT scan as well as Tc-MAA SPECT/CT for hepatopulmonary shunting...
July 2018: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/29659389/fdg-pet-ct-focal-uptake-on-an-ocular-prosthesis
#19
Alessandra Repetto, Carolina Igua, Pablo Sopena, Pilar Bello
We present a case of an unexpected focally increased radiotracer uptake in an artificial eye in an FDG-PET/CT scan that was performed on a woman with a history of choroidal melanoma. It is crucial to know the type of prosthesis used and the timing of replacement for a correct interpretation of the findings. Recently, an FDG PET/CT was proposed to monitor the vascularity of the prosthesis instead of gadolinium MRI or of Tc bone scintigraphy.
June 2018: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/29625755/-99m-technetium-based-prostate-specific-membrane-antigen-radioguided-surgery-in-recurrent-prostate-cancer
#20
Tobias Maurer, Stephanie Robu, Margret Schottelius, Kristina Schwamborn, Isabel Rauscher, Nynke S van den Berg, Fijs W B van Leeuwen, Bernhard Haller, Thomas Horn, Matthias M Heck, Jürgen E Gschwend, Markus Schwaiger, Hans-Jürgen Wester, Matthias Eiber
BACKGROUND: Prostate-specific membrane antigen (PSMA)-targeted positron emission tomography (PET) can visualize metastatic lesions in recurrent prostate cancer (PC). However, reliable identification of small and/or atypically localized lesions during salvage surgery procedures is challenging. OBJECTIVE: To describe the technique, feasibility, and short-term outcomes of 99m Technetium (99m Tc)-based PSMA-radioguided surgery (99m Tc-PSMA-RGS) for removal of recurrent PC lesions...
April 3, 2018: European Urology
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