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99m Tc SPECT

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https://www.readbyqxmd.com/read/29145285/degeneration-of-paramedian-nuclei-in-the-thalamus-induces-holmes-tremor-in-a-case-of-artery-of-percheron-infarction
#1
Tz-Shiang Wei, Chun-Sheng Hsu, Yu-Chun Lee, Shin-Tsu Chang
RATIONALE: Holmes' tremor is an uncommon neurologic disorder following brain insults, and its pathogenesis is undefined. The interruption of the dento-rubro-thalamic tract and secondary deterioration of the nigrostriatal pathway are both required to initiate Holmes' tremor. We used nuclear medicine imaging tools to analyze a patient with concurrent infarction in different zones of each side of the thalamus. Finding whether the paramedian nuclear groups of the thalamus were injured was a decisive element for developing Holmes' tremor...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29140573/-99m-tc-labeled-rhuepo-for-imaging-of-the-erythropoietin-receptor-in-tumors
#2
Xiaoqing Zhuang, Dan Zhao, Pengfei Yang, Yingqin Jia, Rui Liang, Qian Zhao, Chunlei Han, Joseph M Kinsella, Ruilong Sheng, Juan Li
To analyze erythropoietin receptor (EpoR) status in tumors, recombinant human erythropoietin (rHuEpo) was labeled with (99m) Tc by (99m) Tc-centered one-pot synthesis, resulting in high radiochemical purity, stability and biological activity. Both in vitro cell culture experiments and biodistribution studies of normal rats demonstrated successful EpoR targeting. The biodistribution of labeled rHuEpo in a NCI-H1975 xenograft model showed tumor accumulation (tumor-to-muscle ratio: 4.27±1.77), confirming the expression of active EpoR in tumors...
November 15, 2017: Journal of Labelled Compounds & Radiopharmaceuticals
https://www.readbyqxmd.com/read/29122401/the-efficacy-of-adrenocorticotropic-hormone-in-a-girl-with-anti-n-methyl-d-aspartate-receptor-encephalitis
#3
Mari Hatanaka, Shuichi Shimakawa, Akihisa Okumura, Jun Natsume, Miho Fukui, Shohei Nomura, Mitsuru Kashiwagi, Hiroshi Tamai
BACKGROUND: Immunomodulatory therapy has shown some therapeutic benefits in patients with anti-N-methyl-D-aspartate receptor (anti-NMDAR) encephalitis. In this report, we describe the use of adrenocorticotropic hormone (ACTH) immunotherapy with good outcome in a patient with anti-NMDAR encephalitis. SUBJECT AND METHODS: A 4-year-old girl developed convulsions in her right arm and leg without impaired consciousness. These convulsions occurred frequently in clusters of 10-20 events of 10-20 s duration...
November 6, 2017: Brain & Development
https://www.readbyqxmd.com/read/29119373/additional-value-of-systolic-wall-thickening-in-myocardial-stunning-evaluated-by-stress-rest-gated-perfusion-spect
#4
Alberto Bestetti, Besart Cuko, Adriano Decarli, Alessio Galli, Federico Lombardi
AIM AND PATIENTS: The aim of the present study is to evaluate the additional value of systolic wall thickening to myocardial perfusion in diagnosing myocardial stunning in patients with angiography proven coronary artery disease. We selected 91 ischemic patients (82 males; mean age 59.7 ± 10.3) with CAD documented by angiography. Ischemia was defined as a summed difference score ≥5. All patients underwent a 2-day gated perfusion SPECT protocol. The patients received a dose of 740 MBq of (99m)Tc-tetrofosmin after stress and at rest...
November 8, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/29116562/prediction-of-long-term-%C3%A2-10%C3%A2-year-cardiovascular-outcomes-in-heart-transplant-recipients-value-of-stress-technetium-99m-tetrofosmin-myocardial-perfusion-imaging
#5
Jesse F Veenis, Hendrik J Boiten, Jan C van den Berge, Kadir Caliskan, Alex P W M Maat, Roelf Valkema, Alina A Constantinescu, Olivier C Manintveld, Felix Zijlstra, Ron T van Domburg, Arend F L Schinkel
BACKGROUND: Myocardial perfusion imaging (MPI) using single-photon emission computed tomography (SPECT) is useful in the evaluation of cardiac allograft vasculopathy (CAV) in heart transplant (HTx) recipients. The current study evaluated the long-term prognostic value of stress SPECT MPI for predicting all-cause mortality and cardiac events in HTx recipients. METHODS: The study population consisted of 166 HTx recipients (mean age 54 ± 10 years, 84% male) who underwent exercise or dobutamine stress (99m)Tc-tetrofosmin SPECT MPI for the assessment of CAV...
November 7, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/29105797/-99m-tc-mip-1404-spect-ct-for-the-detection-of-psma-positive-lesions-in-225-patients-with-biochemical-recurrence-of-prostate-cancer
#6
Christian Schmidkonz, Claudia Hollweg, Michael Beck, Julia Reinfelder, Theresa I Goetz, James C Sanders, Daniela Schmidt, Olaf Prante, Tobias Bäuerle, Alexander Cavallaro, Michael Uder, Bernd Wullich, Peter Goebell, Torsten Kuwert, Philipp Ritt
BACKGROUND: (99m) Tc-MIP-1404 (Progenics Pharmaceuticals, Inc., New York, NY) is a novel, SPECT-compatible (99m) Tc-labeled PSMA inhibitor for the detection of prostate cancer. We present results of its clinical use in a cohort of 225 men with histologically confirmed prostate cancer referred for workup of biochemical relapse. METHODS: From April 2013 to April 2017, (99m) Tc-MIP1404-scintigraphy was performed in 225 patients for workup of PSA biochemical relapse of prostate cancer...
November 6, 2017: Prostate
https://www.readbyqxmd.com/read/29097923/radiolabeling-and-quantitative-in-vivo-spect-ct-imaging-study-of-liposomes-using-the-novel-iminothiolane-99m-tc-tricarbonyl-complex
#7
Zoltán Varga, Imola Cs Szigyártó, István Gyurkó, Rita Dóczi, Ildikó Horváth, Domokos Máthé, Krisztián Szigeti
The in vivo biodistribution of liposomal formulations greatly influences the pharmacokinetics of these novel drugs; therefore the radioisotope labeling of liposomes and the use of nuclear imaging methods for in vivo studies are of great interest. In the present work, a new procedure for the surface labeling of liposomes is presented using the novel (99m)Tc-tricarbonyl complex. Liposomes mimicking the composition of two FDA approved liposomal drugs were used. In the first step of the labeling, thiol-groups were formed on the surface of the liposomes using Traut's reagent, which were subsequently used to bind (99m)Tc-tricarbonyl complex to the liposomal surface...
2017: Contrast Media & Molecular Imaging
https://www.readbyqxmd.com/read/29089770/bupropion-interferes-with-the-image-diagnosis-of-parkinson-s-disease
#8
Chieh-Hsin Lin, Hsien-Yuan Lane
Major depressive disorder (MDD) and Parkinson's disease (PD) share symptoms such as tremor. Bupropion, a norepinephrine-dopamine reuptake inhibitor, shows weak dopamine transporter (DAT) occupancy. We report here on a patient with MDD whose hand tremors might have been misdiagnosed as PD by single-photon emission computed tomography (SPECT) under bupropion use. A 66-year-old male patient with MDD had been receiving bupropion 150 mg per day for 6 months. His mood symptoms improved partially with bupropion treatment, however, hand tremors persisted...
2017: Neuropsychiatric Disease and Treatment
https://www.readbyqxmd.com/read/29057777/evaluation-of-accuracy-for-quantitative-predictor-of-hepatic-functional-reserve-using-planar-and-spect-images-in-the-99m-tc-gsa-scintigraphy
#9
Daisuke Hasegawa, Hideo Onishi
PURPOSE: The purpose of this study was to evaluate the accuracy for quantitative predictor of hepatic functional reserve using planar and single photon emission computed tomography (SPECT) images. METHODS: We acquired planar and SPECT images of the myocardial torso phantom and calculated LHL (uptake ratio of the liver to the liver plus heart). Planar images were used with and without scatter correction. Myocardial torso phantom was simulated radioactivity distribution of normal liver function and poor liver function...
2017: Nihon Hoshasen Gijutsu Gakkai Zasshi
https://www.readbyqxmd.com/read/29057775/influence-of-the-pixel-sizes-of-reference-computed-tomography-on-single-photon-emission-computed-tomography-image-reconstruction-using-conjugate-gradient-algorithm
#10
Kyohei Okuda, Shota Sakimoto, Susumu Fujii, Tomonobu Ida, Shigeru Moriyama
PURPOSE: The frame-of-reference using computed-tomography (CT) coordinate system on single-photon emission computed tomography (SPECT) reconstruction is one of the advanced characteristics of the xSPECT reconstruction system. The aim of this study was to reveal the influence of the high-resolution frame-of-reference on the xSPECT reconstruction. METHODS: (99m)Tc line-source phantom and National Electrical Manufacturers Association (NEMA) image quality phantom were scanned using the SPECT/CT system...
2017: Nihon Hoshasen Gijutsu Gakkai Zasshi
https://www.readbyqxmd.com/read/29057056/2-4-aminophenyl-benzothiazole-labeled-with-99m-tc-cyclopentadienyl-for-imaging-%C3%AE-amyloid-plaques
#11
Christos Kiritsis, Barbara Mavroidi, Antonio Shegani, Lazaros Palamaris, George Loudos, Marina Sagnou, Ioannis Pirmettis, Minas Papadopoulos, Maria Pelecanou
The development of a (99m)Tc-radiotracer for imaging of β-amyloid (Aβ) plaques with single photon emission computed tomography (SPECT) is strongly anticipated to provide a low cost and broadly accessible diagnostic tool for Alzheimer's disease (AD). Within this framework, 2-(4'-aminophenyl)benzothiazole, known to display affinity and specificity for Aβ plaques, has been joined to the tricarbonyl fac-[M(CO)3](+) (M = Re(I), (99m)Tc(I)) core through the cyclopentadienyl moiety to yield stable, neutral, and lipophilic complexes (Re-1 and (99m)Tc-1, respectively)...
October 12, 2017: ACS Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/29054361/metastatic-melanoma-imaging-using-a-novel-tc-99m-labeled-lactam-cyclized-alpha-msh-peptide
#12
Liqin Liu, Jingli Xu, Jianquan Yang, Changjian Feng, Yubin Miao
The purpose of this study was to determine the metastatic melanoma imaging property of (99m)Tc(EDDA)-HYNIC-Aoc-Nle-CycMSHhex {hydrazinonicotinamide-8-aminooctanoic acid-Nle-c[Asp-His-DPhe-Arg-Trp-Lys]-CONH2}. HYNIC-Aoc-Nle-CycMSHhex was synthesized using fluorenylmethyloxy carbonyl (Fmoc) chemistry. The IC50 value of HYNIC-Aoc-Nle-CycMSHhex was 0.78 ± 0.13 nM for B16/F10 melanoma cells. (99m)Tc(EDDA)-HYNIC-Aoc-Nle-CycMSHhex displayed significantly higher uptake (14.26 ± 2.74 and 10.45 ± 2.31% ID/g) in B16/F10 metastatic melanoma-bearing lung than that in normal lung (0...
November 15, 2017: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/29053416/imaging-of-integrin-%C3%AE-v%C3%AE-3-expression-in-lung-cancers-and-brain-tumors-using-single-photon-emission-computed-tomography-with-a-novel-radiotracer-99m-tc-ida-d-c-rgdfk-2
#13
Yoo Sung Song, Hyun Soo Park, Byung Chul Lee, Jae Ho Jung, Ho-Young Lee, Sang Eun Kim
Integrin αvβ3 is a molecular marker for the estimation of tumor angiogenesis and is an imaging target for radiolabeled Arg-Gly-Asp (RGD) peptides. In this study, the authors investigated the clinical efficacy and safety of a novel radiolabeled RGD peptide, (99m)Tc-IDA-D-[c(RGDfK)]2, for the imaging of integrin αvβ3 expression, as a measure of tumor angiogenesis in lung cancers and brain tumors. Five patients with lung cancers and seven with brain tumors underwent (99m)Tc-IDA-D-[c(RGDfK)]2 single-photon emission computed tomography (SPECT) imaging...
October 2017: Cancer Biotherapy & Radiopharmaceuticals
https://www.readbyqxmd.com/read/29042166/radiolabeling-and-preliminary-biodistribution-study-of-99m-tc-labeled-antibody-mimetic-scaffold-protein-repebody-for-initial-clearance-properties
#14
Sajid Mushtaq, Jong Kook Rho, Jung Ae Kang, Joong-Jae Lee, Jung Young Kim, You Ree Nam, Seong-Jae Yun, Gyeong Hee Lee, Sang Hyun Park, Dong-Eun Lee, Hak-Sung Kim
Antibody-mimetic proteins are intensively being developed for biomedical applications including tumor imaging and therapy. Among them, repebody is a new class of protein that consists of highly diverse leucine-rich repeat (LRR) modules. Although all possible biomedical applications with repebody are ongoing, it's in vivo biodistribution and excretion pathway has not yet been explored. In this study, hexahistidine (His6)-tag bearing repebody (rEgH9) was labeled with [(99m)Tc]-tricarbonyl, and biodistribution was performed following intravenous (I...
November 15, 2017: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/29039109/a-novel-utility-of-99m-tc-gsa-spect-ct-fusion-imaging-detection-of-inadequate-portal-vein-embolization
#15
Tatsuaki Sumiyoshi, Yasuo Shima, Takehiro Okabayashi, Yasuhiro Hata, Yoshihiro Noda, Michihiko Kouno, Yuichi Saisaka, Kenta Sui, Sojiro Morita, Yuji Negoro, Taijiro Sueda
PURPOSE: Our aim was to determine the utility of Tc-99m-diethylenetriaminepentaacetic acid-galactosyl human serum albumin single-photon-emission computed tomography ((99m)Tc-GSA SPECT/CT) fusion imaging for detecting incomplete portal vein embolization (PVE). MATERIALS AND METHODS: Fifty-five candidates underwent PVE. Among them, five underwent second PVE. Detectability of first inadequate PVE using CT and (99m)Tc-GSA SPECT/CT fusion imaging was analyzed. RESULTS: Cases of inadequate PVE were detected in three patients using CT and in five using (99m)Tc-GSA SPECT/CT fusion imaging...
October 16, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/29038813/targeted-tumor-spect-ct-dual-mode-imaging-using-multifunctional-rgd-modified-low-generation-dendrimer-entrapped-gold-nanoparticles
#16
Xiaoying Xu, Lingzhou Zhao, Xin Li, Peng Wang, Jinhua Zhao, Xiangyang Shi, Mingwu Shen
Multifunctional low-generation dendrimer-entrapped gold nanoparticles (Au DENPs) were designed and synthesized. The formed Au DENPs modified with an arginine-glycine-aspartic peptide and labeled with (99m)Tc possess a uniform size distribution, desirable colloidal stability and biocompatibility, and can be used as a promising nanoprobe for targeted SPECT/CT imaging of αvβ3 integrin-expressing tumors.
October 17, 2017: Biomaterials Science
https://www.readbyqxmd.com/read/29031229/-99m-tc-duramycin-for-cell-death-imaging-impact-of-kit-formulation-purification-and-species-difference
#17
Luca Palmieri, Filipe Elvas, Christel Vangestel, Koon Pak, Brian Gray, Sigrid Stroobants, Steven Staelens, Leonie Wyffels
INTRODUCTION: [(99m)Tc]duramycin is a SPECT tracer for cell death imaging. We evaluated the impact of kit formulation, purification and species difference on the pharmacokinetic profile and cell death targeting properties of [(99m)Tc]duramycin in order to define the optimal conditions for (pre-)clinical use. METHODS: Three kits were prepared (A: traditional formulation, B: containing 1/3 of ingredients, C: containing HYNIC-PEG12-duramycin). Following labeling, the kits were used without purification, or with SPE or HPLC purification...
September 14, 2017: Nuclear Medicine and Biology
https://www.readbyqxmd.com/read/29030760/patient-specific-dosimetry-of-99m-tc-hynic-tyr-3-octreotide-in-children
#18
Xinchi Hou, Bozena Birkenfeld, Hanna Piwowarska-Bilska, Anna Celler
BACKGROUND: Technetium-99m-hydrazinonicotinamide-Tyr(3)-octreotide ((99m)Tc-HYNIC-TOC) is recognized as a promising radiopharmaceutical for diagnosing neuroendocrine tumors (NETs). However, (99m)Tc-HYNIC-TOC dosimetry has been investigated only for adults. As pediatric radionuclide therapies become increasingly common, similar dosimetric studies for children are urgently needed. The aim of this study is to report personalized image-based biodistributions and dosimetry evaluations for children studies performed using (99m)Tc-HYNIC-TOC and to compare them with those from adult subjects...
October 13, 2017: EJNMMI Physics
https://www.readbyqxmd.com/read/29023951/synthesis-99m-tc-labeling-and-preliminary-biological-evaluation-of-dtpa-melphalan-conjugates
#19
Jianjun Wang, Wenjiang Yang, Jinquan Xue, Yanhua Zhang, Yu Liu
Melphalan (MFL) is a typical nitrogen mustard for the treatment of many types of cancer. For the purpose to develop novel (99m) Tc-labeled tumor imaging agents with SPECT, MFL was directly labeled by (99m) Tc using DTPA (diethylene triamine pentacetate acid) as bifunctional chelating agent. The novel ligands were successfully synthesized by conjugation of DTPA to melphalan to get mono-substituted DTPA-MFL and bis-substituted DTPA-2MFL. Radiolabeling was performed in high yield to get (99m) Tc-DTPA-MFL and (99m) Tc-DTPA-2MFL respectively, which were hydrophilic and stable at room temperature...
October 11, 2017: Journal of Labelled Compounds & Radiopharmaceuticals
https://www.readbyqxmd.com/read/29023153/predictability-of-99m-tc-galactosyl-human-serum-albumin-scintigraphy-for-posthepatectomy-liver-failure
#20
Ayako Kato, Yuji Nakamoto, Takayoshi Ishimori, Satoru Seo, Shinji Uemoto, Kaori Togashi
OBJECTIVE: Posthepatectomy liver failure (PHLF) is one of the most serious complications after hepatectomy. The objective of the present study is to assess the potential diagnostic ability of (99m)Tc-galactosyl human serum albumin (GSA) scintigraphy to predict PHLF as defined by the International Study Group of Liver Surgery (ISGLS). MATERIALS AND METHODS: Data from 100 patients who underwent (99m)Tc-GSA scintigraphy and subsequent hepatectomy were retrospectively analyzed...
October 12, 2017: AJR. American Journal of Roentgenology
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