keyword
MENU ▼
Read by QxMD icon Read
search

Technetium 99m

keyword
https://www.readbyqxmd.com/read/28444638/nuclear-cardiology-are-we-using-the-right-protocols-and-tracers-the-right-way
#1
REVIEW
Maurizio Dondi, Thomas Pascual, Diana Paez, Andrew J Einstein
The field of nuclear cardiology has changed considerably over recent years, with greater attention paid to safety and radiation protection issues. The wider usage of technetium-99m (Tc-99m)-labeled radiopharmaceuticals for single-photon emission computed tomography (SPECT) imaging using gamma cameras has contributed to better quality studies and lower radiation exposure to patients. Increased availability of tracers and scanners for positron emission tomography (PET) will help further improve the quality of studies and quantify myocardial blood flow and myocardial flow reserve, thus enhancing the contribution of non-invasive imaging to the management of coronary artery disease...
April 25, 2017: American Journal of Cardiovascular Drugs: Drugs, Devices, and Other Interventions
https://www.readbyqxmd.com/read/28443578/the-hyoid-bone-and-thyroid-cartilage-metastases-from-the-sigmoid-colon-adenocarcinoma-a-case-report
#2
Djurdja Bracanovic, Vesna Vukovic, Aleksa Janovic, Davorin Radosavljevic, Zoran Rakocevic
BACKGROUND: Secondary tumors of the hyoid bone and thyroid cartilage are extremely rare. In this paper, we presented a case of the hyoid bone and thyroid cartilage metastases in patient treated for the sigmoid colon adenocarcinoma. CASE REPORT: Four years after sigmoid colon adenocarcinoma was diagnosed and treated with surgery and chemotherapy, the patient developed bone metastases in left sacroiliac joint and right proximal humerus. Although patient didn't complain of any related symptom, in bone scintigraphy accumulation of Technetium-99m was incidentally detected in the two sites of the anterior neck...
April 13, 2017: Balkan Medical Journal
https://www.readbyqxmd.com/read/28437154/prediction-of-relapse-from-hyperthyroidism-following-antithyroid-medication-withdrawal-using-technetium-thyroid-uptake-scanning
#3
Manouchehr Nakhjavani, Soraya Abdollahi, Saeed Farzanefar, Mohammadtagi Abousaidi, Alireza Esteghamati, Maryam Naseri, Mohamad Eftekhari, Mehrshad Abbasi
OBJECTIVE: Technetium thyroid uptake (TTU) is not inhibited by antithyroid drugs (ATD) and reflects the degree of thyroid stimulation. We intended to predict the relapse rate from hyperthyroidism based on TTU measurement. METHODS: Out of 44 initially enrolled subjects, 38 patients aged 41.6 ± 14.6 with Graves disease (duration: 84 ± 78 months) completed the study. TTU was performed with 40-second imaging of the neck and mediastinum 20 minutes after injection of 1 mCi technetium-99m pertechnetate...
April 2, 2017: Endocrine Practice
https://www.readbyqxmd.com/read/28430738/three-dimensional-fractal-analysis-of-99mtc-maa-spect-images-in-chronic-thromboembolic-pulmonary-hypertension-for-evaluation-of-response-to-balloon-pulmonary-angioplasty-association-with-pulmonary-arterial-pressure
#4
Yasuhiro Maruoka, Michinobu Nagao, Shingo Baba, Takuro Isoda, Yoshiyuki Kitamura, Yuzo Yamazaki, Koichiro Abe, Masayuki Sasaki, Kohtaro Abe, Hiroshi Honda
OBJECTIVE: Balloon pulmonary angioplasty (BPA) is used for inoperable chronic thromboembolic pulmonary hypertension (CTEPH), but its effect cannot be evaluated noninvasively. We devised a noninvasive quantitative index of response to BPA using three-dimensional fractal analysis (3D-FA) of technetium-99m-macroaggregated albumin (Tc-MAA) single-photon emission computed tomography (SPECT). PATIENTS AND METHODS: Forty CTEPH patients who underwent pulmonary perfusion scintigraphy and mean pulmonary arterial pressure (mPAP) measurement by right heart catheterization before and after BPA were studied...
April 20, 2017: Nuclear Medicine Communications
https://www.readbyqxmd.com/read/28430366/cyclic-rgd-penta-peptides-crgdyk-derivatized-with-cyclopentadienyl-complexes-of-technetium-and-rhenium-as-radiopharmaceutical-probes
#5
Qaisar Nadeem, Yunjun Shen, Muhammad Farooq Warsi, Gulfam Nasar, Muhammad Abdul Qadir, Roger Alberto
The present study reports the syntheses of half-sandwich complexes of the type [M(η(5) -C5 H4 CONH-R)(CO)3 ] (M = Re,(99m) Tc;R = cyclic RGD peptide (cRGDyK) for potential imaging of αv β3 integrin expression. The (99m) Tc complex was prepared directly from the reaction of [(99m) Tc(OH2 )3 (CO)3 ](+) with cRGDyK, doubly conjugated to Thiele's acid [(C5 H5 COOH)2 ] in water. This approach extends the viability of metal-mediated retro Diels-Alder reactions for the preparation of small molecules such as linear tripeptides to a more complex cyclic peptide carrying a [(η(5) -C5 H4 )(99m) Tc(CO)3 ] tag...
April 21, 2017: Journal of Labelled Compounds & Radiopharmaceuticals
https://www.readbyqxmd.com/read/28429212/experimental-study-of-a-radiopharmaceutical-agent-based-on-modified-fatty-acid-labeled-with-technetium-99m
#6
S I Sazonova, Yu N Il'yushenkova, Yu B Lishmanov, S V Tsibul'nikov, V S Skuridin, E A Nesterov, N V Varlamova, E A Il'ina, V D Filimonov, M V Belyanin, E V Stepanova, S M Minin
Using rat model of coronary occlusion, we studied pharmacokinetics and the efficiency of a new radiopharmaceutical agent (99m)Tc-PDA-DTPA intended for diagnostics of changes in myocardial metabolism and its analogue (123)I-PMPDA. (99m)Tc-PDA-DTPA was eliminated mostly by the kidneys and maximal concentration in the heart was attained within 60 min after intravenous injection; no accumulation in the area of myocardial infarction was observed. The studied substance was inferior to its analogue 123I-PMPDA by the quality of scintigraphic visualization of the heart...
April 20, 2017: Bulletin of Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28423481/prevalence-of-gastric-motility-disorders-in-patients-with-functional-dyspepsia
#7
Haruki Asano, Toshihiko Tomita, Kumiko Nakamura, Takahisa Yamasaki, Takuya Okugawa, Takashi Kondo, Tomoaki Kono, Katsuyuki Tozawa, Yoshio Ohda, Tadayuki Oshima, Hirokazu Fukui, Kazuhito Fukushima, Shozo Hirota, Jiro Watari, Hiroto Miwa
Background/Aims: Gastric motility abnormalities have been considered to be pathophysiological features of functional dyspepsia (FD) that are closely related to dyspepsia symptoms, especially postprandial distress syndrome (PDS). The aims of this study are to (1) investigate the prevalence of gastric motility disorders and (2) evaluate the association between gastric motility abnormalities and dyspeptic symptoms using gastric scintigraphy in the PDS type of FD. Methods: Forty healthy subjects and 94 PDS type FD patients were enrolled in the study...
April 19, 2017: Journal of Neurogastroenterology and Motility
https://www.readbyqxmd.com/read/28423195/noninvasive-imaging-of-c-rgd-2-9r-as-a-potential-delivery-carrier-for-transfection-of-sirna-in-malignant-tumors
#8
Xue Qi Chen, Meng Liu, Rong Fu Wang, Ping Yan, Chun Li Zhang, Chao Ma, Qian Zhao, Lei Yin, Guang Yu Zhao, Feng Qin Guo
The purpose of our study was to develop and evaluate a novel integrin αv β3 -specific delivery carrier for transfection of siRNA in malignant tumors. We adopted arginine-glycine-aspartate (RGD) motif as a tissue target for specific recognition of integrin αν β3 . A chimaeric peptide was synthesized by adding nonamer arginine residues (9R) at the carboxy terminus of cyclic-RGD dimer, designated as c(RGD)2 -9R, to enable siRNA binding. To test the applicability of the delivery carrier in vivo, c(RGD)2 -9R was labeled with radionuclide of technetium-99 m...
April 18, 2017: Journal of Labelled Compounds & Radiopharmaceuticals
https://www.readbyqxmd.com/read/28421626/editorial-comment-from-dr-teishima-and-dr-matsubara-to-clinical-application-of-calculated-split-renal-volume-using-computed-tomography-based-renal-volumetry-after-partial-nephrectomy-correlation-with-technetium-99m-dimercaptosuccinic-acid-renal-scan-data
#9
Jun Teishima, Akio Matsubara
No abstract text is available yet for this article.
April 18, 2017: International Journal of Urology: Official Journal of the Japanese Urological Association
https://www.readbyqxmd.com/read/28418820/case-241-hemiparkinsonism-hemiatrophy-spect-with-99m-tc-trodat-1-and-muscle-mr-imaging-abnormalities
#10
Thiago Cardoso Vale, Flávia Cristina de Lima Pinto, José Luiz Pedroso, Marília Alves Dos Reis, Ilza Rosa Batista, Rodrigo Affonseca Bressan, René Leandro Magalhães Rivero, Renato Adam Mendonça, Orlando G Barsottini
History A 43-year-old right-handed man presented with a history of progressive mild left-sided weakness and slowness of movements. Symptoms began 4 years earlier, and the patient noticed a progressive decline in his daily routine due to gait difficulties in the past year. There was no history of head trauma, surgery, drug therapy, smoking, or alcohol abuse, nor was there any relevant family history. Examination revealed normal cognition (29 of 30 points on the Mini-Mental State Examination and 27 of 30 points on the Montreal Cognitive Assessment) and normal cerebellar, sensory, cranial nerve, and autonomic function...
May 2017: Radiology
https://www.readbyqxmd.com/read/28415513/evaluation-of-radiolabeled-curcumin-loaded-solid-lipid-nanoparticles-usage-as-an-imaging-agent-in-liver-spleen-scintigraphy
#11
Arif Kursad Ayan, Ayse Yenilmez, Hayrettin Eroglu
Curcumin-loaded solid lipid nanoparticles (C-SLNs) were prepared using micro emulsion and ultrasonication methods in the first stage of this study to determine the role of C-SLN on liver-spleen scintigraphy. It was concluded that the curcumin that was encapsulated in solid lipid nanoparticles had a β' polymorph structure according to the X-ray diffraction (XRD) analysis. İt was concluded that these particles were at nano scale according to the laser diffraction (LD) analysis. Fourier transform infrared spectroscopy (FT-IR) analysis suggested an interaction between the curcumin and the solid lipid matrix, and the curcumin was loaded on the solid lipid nanoparticles...
June 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28411704/lymphoscintigraphic-abnormalities-in-the-contralateral-lower-limbs-of-patients-with-unilateral-lymphedema
#12
Camila Alcoforado de Almeida, Esdras Marques Lins, Simone Cristina Soares Brandão, Álvaro Antônio Bandeira Ferraz, Flavia Cristina Morone Pinto, Silvio Romero de Barros Marques
OBJECTIVE: The contralateral limbs of patients with unilateral lymphedema in the lower limbs (LLs) can exhibit abnormal lymphatic circulation, even in the absence of lymphedema. This idea is based on a number of reports that have studied isolated cases using lymphoscintigraphy. It is likely that these patients previously had some form of lymphopathy, and the lymphedema arose after the action of some external factor. However, there are no studies in the literature that adequately assess the asymptomatic contralateral limbs of these patients or address the prevalence and characteristics of the abnormal lymphatic circulation in these limbs...
May 2017: Journal of Vascular Surgery. Venous and Lymphatic Disorders
https://www.readbyqxmd.com/read/28410289/initial-experience-with-real-time-hybrid-single-photon-emission-computed-tomography-computed-tomography-guided-percutaneous-transthoracic-needle-biopsy
#13
Qian Hua, Xiangyun Zhu, Lei Zhang, Yanjun Zhao, Ping Tang, Jianming Ni
The aim of this study was to explore a technique that uses real-time fusion image of single-photon emission computed tomography/computed tomography (SPECT/CT) to guide percutaneous transthoracic needle biopsy (PTNB) and test its feasibility and safety in patients. Twelve patients with intrathoracic lesions suspicious for malignancy underwent real-time 99m-technetium sestamibi SPECT/CT-guided PTNB. Chest SPECT/CT fusion images were used for biopsy planning and intraprocedure fusion of SPECT with guiding CT was used to adjust the puncture angle and direction...
April 13, 2017: Nuclear Medicine Communications
https://www.readbyqxmd.com/read/28410210/non-invasive-assessment-of-murine-pd-l1-levels-in-syngeneic-tumor-models-by-nuclear-imaging-with-nanobody-tracers
#14
Katrijn Broos, Marleen Keyaerts, Quentin Lecocq, Dries Renmans, Tham Nguyen, David Escors, Adrian Liston, Geert Raes, Karine Breckpot, Nick Devoogdt
Blockade of the inhibitory PD-1/PD-L1 immune checkpoint axis is a promising cancer treatment. Nonetheless, a significant number of patients and malignancies do not respond to this therapy. To develop a screen for response to PD-1/PD-L1 inhibition, it is critical to develop a non-invasive tool to accurately assess dynamic immune checkpoint expression. Here we evaluated non-invasive SPECT/CT imaging of PD-L1 expression, in murine tumor models with varying PD-L1 expression, using high affinity PD-L1-specific nanobodies (Nbs)...
March 30, 2017: Oncotarget
https://www.readbyqxmd.com/read/28407050/infarct-size-left-ventricular-function-and-prognosis-in-women-compared-to-men-after-primary-percutaneous-coronary-intervention-in-st-segment-elevation-myocardial-infarction-results-from-an-individual-patient-level-pooled-analysis-of-10-randomized-trials
#15
Ioanna Kosmidou, Björn Redfors, Harry P Selker, Holger Thiele, Manesh R Patel, James E Udelson, E Magnus Ohman, Ingo Eitel, Christopher B Granger, Akiko Maehara, Ajay Kirtane, Philippe Généreux, Paul L Jenkins, Ori Ben-Yehuda, Gary S Mintz, Gregg W Stone
Aim: Studies have reported less favourable outcomes in women compared with men after primary percutaneous coronary intervention (PCI) in ST-segment elevation myocardial infarction (STEMI). Whether sex-specific differences in the magnitude or prognostic impact of infarct size or post-infarction cardiac function explain this finding is unknown. Methods and results: We pooled patient-level data from 10 randomized primary PCI trials in which infarct size was measured within 1 month (median 4 days) by either cardiac magnetic resonance imaging or technetium-99m sestamibi single-photon emission computed tomography...
April 12, 2017: European Heart Journal
https://www.readbyqxmd.com/read/28406001/disabling-osteopetrosis-in-an-young-lady
#16
Gouranga Santra, Shinjan Patra, Partha Pratim Chakraborty
Osteopetrosis is a rare disorder of osteoclastic bone resorption leading to hyperostosis. Albers-Schonberg disease, an autosomal dominant variant of osteopetrosis occurs in young adults and has a benign course. A 17 year old female presented with generalized weakness and pallor for last two months. She had insidious onset and gradually progressive loss of vision and hearing for last two years. Plain x-ray of skull revealed increased radio-opacity of skull bones specially in the base, severe under-pneumatization of frontal and sphenoidal sinuses...
December 2016: Journal of the Association of Physicians of India
https://www.readbyqxmd.com/read/28400059/maximum-standardised-uptake-value-of-quantitative-bone-spect-ct-in-patients-with-medial-compartment-osteoarthritis-of-the-knee
#17
J Kim, H-H Lee, Y Kang, T K Kim, S W Lee, Y So, W W Lee
AIM: To evaluate the correlation between the maximum standardised uptake value (SUVmax) from bone single-photon-emission computed tomography/computed tomography (SPECT/CT) and other imaging parameters for medial compartment osteoarthritis (OA) of the knee. MATERIALS AND METHODS: Patients (n=26; male:female=2:24; age, 55.3±5.8 years) underwent quantitative knee SPECT/CT using technetium-99m (Tc-99m) hydroxymethylene diphosphonate (HDP) before surgical operation for medial OA of the knee...
April 8, 2017: Clinical Radiology
https://www.readbyqxmd.com/read/28399034/sentinel-lymphadenectomy-in-vulvar-cancer-using-near-infrared-fluorescence-from-indocyanine-green-compared-with-technetium-99m-nanocolloid
#18
Philipp Soergel, Hermann Hertel, Anna Kaarina Nacke, Rüdiger Klapdor, Thorsten Derlin, Peter Hillemanns
OBJECTIVE: Nowadays, sentinel diagnostic is performed using technetium 99m (Tc) nanocolloid as a radioactive marker and sometimes patent blue. In the last years, indocyanine green has been evaluated for sentinel diagnostic in different tumor entities. Indocyanine green is a fluorescent molecule that emits a light signal in the near-infrared band after excitation. Our study aimed to evaluate indocyanine green compared with the criterion-standard Tc-nanocolloid. METHODS: We included patients with primary, unifocal vulvar cancer of less than 4 cm with clinically node-negative groins in this prospective trial...
May 2017: International Journal of Gynecological Cancer
https://www.readbyqxmd.com/read/28392947/nuclear-imaging-to-detect-diaphragmatic-perforation-as-a-rare-complication-of-microwave-ablation
#19
Stephanie Cull, Gebran Khneizer, Abhishek Krishna, Razi Muzaffar, Sameer Gadani, Zafar Jamkhana
Acquired diaphragmatic perforation leading to massive hepatic hydrothorax and respiratory failure is a rare complication of microwave ablation (MWA) of hepatocellular carcinoma (HCC). Imaging modalities to detect pleuroperitoneal communication remain poorly described. We report a nuclear imaging technique used to efficiently diagnose and locate diaphragmatic defects. A 57-year-old male with cirrhosis and HCC presented with respiratory distress after undergoing MWA of a HCC lesion. He was admitted to the intensive care unit for noninvasive positive pressure ventilator support...
2017: Case Reports in Critical Care
https://www.readbyqxmd.com/read/28388273/musculoskeletal-imaging-findings-of-hematologic-malignancies
#20
Shannon M Navarro, George R Matcuk, Dakshesh B Patel, Matthew Skalski, Eric A White, Anderanik Tomasian, Aaron J Schein
Hematologic malignancies comprise a set of prevalent yet clinically diverse diseases that can affect every organ system. Because blood components originate in bone marrow, it is no surprise that bone marrow is a common location for both primary and metastatic hematologic neoplasms. Findings of hematologic malignancy can be seen with most imaging modalities including radiography, computed tomography (CT), technetium 99m ((99m)Tc) methylene diphosphonate (MDP) bone scanning, fluorine 18 ((18)F) fluorodeoxyglucose (FDG) positron emission tomography (PET)/CT, and magnetic resonance (MR) imaging...
April 7, 2017: Radiographics: a Review Publication of the Radiological Society of North America, Inc
keyword
keyword
70032
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"