Read by QxMD icon Read

99m Tc SPECT

Rumiko Takayama, Katsumi Imai, Hiroko Ikeda, Koichi Baba, Naotaka Usui, Yukitoshi Takahashi, Yushi Inoue
We describe two cases of refractory epilepsy with cerebral hemiatrophy and contralateral electroencephalographic (EEG) abnormalities, in which hemispherotomy of the atrophic hemisphere effectively controlled seizures. Case 1 was a 5-year-1-month-old girl with refractory bilateral asymmetrical tonic posturing seizures predominantly in the right arm. Magnetic resonance imaging showed left porencephaly corresponding to a left middle cerebral artery infarction. Case 2 was a 3-year-8-month-old boy with refractory bilateral asymmetrical tonic posturing seizures predominantly in the right arm due to atrophy of the left cerebral hemisphere after septic meningitis...
March 14, 2018: Brain & Development
C Fielder Camm, Alexander Emery, Elizabeth Rose-Innes, Sergei Pavlitchouk, Nikant Sabharwal, Andrew D Kelion
BACKGROUND: Using myocardial perfusion scintigraphy (MPS), an increase in left ventricular (LV) volumes or a decrease in ejection fraction (EF) from rest to stress may be clinically important. The variation in these measures between the low-dose stress acquisition and high-dose rest acquisition in a one-day stress-rest protocol has not been established. We assessed the reproducibility of gated volumetric indices between stress and rest and the normal variation in ungated TID ratio for a one-day stress-rest99m Tc-tetrofosmin protocol...
March 15, 2018: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
Vikram Khanna, Kashish Khanna, Maddur Srinivas
A day-old neonate presented with bowel obstruction and an abdominal mass. Exploratory laparotomy revealed complete tubular midgut duplication from duodeno-jejunal junction up to terminal ileum which was communicating with the ileum distally. At the proximal end, another 5×5 cm duplication cyst was identified and excised. Postoperatively, complaints were relieved. During follow-up, 99m-Tc-pertechnetate-SPECT scan showed ectopic gastric mucosa in lower abdomen and in the right hemithorax. CECT-chest showed a 3×3 cm foregut duplication cyst, but there were no respiratory symptoms...
March 15, 2018: BMJ Case Reports
Chie Suzuki, Mutsumi Kosugi, Yasuhiro Magata
BACKGROUND: Cerebral blood flow (CBF) quantitation using technetium-99m hexamethylpropyleneamine oxime (99m Tc-HMPAO) generally requires assessment of input function by arterial blood sampling, which would be invasive for small animals. We therefore performed chest dynamic planar imaging, instead of arterial blood sampling, to estimate the input function and establish noninvasive quantitation method of rat CBF using the image-derived input function. RESULTS: Integrated radioactivity concentration in the heart-blood pool on planar images (AUCBlood -planar) was identical to that in arterial blood samples (AUCBlood -sampling)...
March 9, 2018: EJNMMI Research
Trine B Andersen, Ramune Aleksyniene, Søren K Boldsen, Michael Gade, Henrik Bertelsen, Lars J Petersen
OBJECTIVE: The aim of this study was to investigate the contribution of contrast-enhanced computed tomography (CE-CT) to the localization of parathyroid adenomas compared with the dual-phase Tc-99m MIBI SPECT with low-dose CT (LD-CT). PATIENTS AND METHODS: This retrospective study included consecutive patients with primary hyperparathyroidism who underwent a preoperative dual-phase MIBI SPECT/CT followed by surgical resection. The standard of care was dual-phase MIBI SPECT/CT, acquired with LD-CT in the early phase and CE-CT in the late phase (SPECT/CE-CT)...
March 6, 2018: Nuclear Medicine Communications
Mohsen Beheshti, Lukas Hehenwarter, Zeinab Paymani, Gundula Rendl, Larisa Imamovic, Rupert Rettenbacher, Oleksiy Tsybrovskyy, Werner Langsteger, Christian Pirich
PURPOSE: In this prospective study we compared the accuracy of18 F-fluorocholine PET/CT with that of99m Tc-MIBI or99m Tc-tetrofosmin SPECT/CT in the preoperative detection of parathyroid adenoma in patients with primary hyperparathyroidism. We also assessed the value of semiquantitative parameters in differentiating between parathyroid hyperplasia and adenoma. METHODS: Both18 F-fluorocholine PET/CT and99m Tc-MIBI/tetrofosmin SPECT/CT were performed in 100 consecutive patients with biochemical evidence of primary hyperparathyroidism...
March 8, 2018: European Journal of Nuclear Medicine and Molecular Imaging
Saurabh Malhotra, Rami Doukky
No abstract text is available yet for this article.
March 6, 2018: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
Fumihito Yoshii, Chikako Kawaguchi, Saori Kohara, Mie Shimizu, Hiroe Onaka, Masafuchi Ryo, Wakoh Takahashi
The Alzheimer Disease Assessment Scale (Japanese version) cognitive subscale (ADAS-Jcog) is composed of a number of subscale tasks. However, it is not clear which subscale tasks are most susceptible to impairment in Alzheimer's disease (AD) or what is the relationship between reduction in regional cerebral blood flow (rCBF) and decreased ADAS-Jcog scores. Subjects were 32 AD patients, aged 52-86 years. We examined the relationship between subscale tasks that showed marked score changes and brain regions that showed reduced rCBF over a 2-year period...
March 5, 2018: Neurological Sciences
Deliang Zhang, Rongqiang Zhuang, Zhide Guo, Mengna Gao, Lumei Huang, Linyi You, Pu Zhang, Jindian Li, Xinhui Su, Hua Wu, Xiaoyuan Chen, Xianzhong Zhang
Extracellular matrix (ECM) accumulation in liver fibrosis is caused by the activation of hepatic stellate cells (HSCs). The goal of this study was to develop a99m Tc-labeled N-acetylglucosamine (GlcNAc) that specifically interacts with desmin and vimentin expressed on activated HSCs to monitor the progression and prognosis of liver fibrosis using single-photon emission computed tomography (SPECT) imaging. Methods: GlcNAc-conjugated polyethylenimine (PEI) was first prepared and radiolabeled with99m Tc. Noninvasive SPECT imaging with99m Tc-GlcNAc-PEI was used to assess liver fibrosis in a carbon tetrachloride (CCl4 ) mouse model...
2018: Theranostics
Denis Agostini, Vincent Roule, Catherine Nganoa, Nathaniel Roth, Raphael Baavour, Jean-Jacques Parienti, Farzin Beygui, Alain Manrique
PURPOSE: We assessed the feasibility of myocardial blood flow (MBF) and flow reserve (MFR) estimation using dynamic SPECT with a novel CZT camera in patients with stable CAD, in comparison with15 O-water PET and fractional flow reserve (FFR). METHODS: Thirty patients were prospectively included and underwent FFR measurements in the main coronary arteries (LAD, LCx, RCA). A stenosis ≥50% was considered obstructive and a FFR abnormal if ≤0.8. All patients underwent a dynamic rest/stress99m Tc-sestamibi CZT-SPECT and15 O-water PET for MBF and MFR calculation...
March 1, 2018: European Journal of Nuclear Medicine and Molecular Imaging
Ryo Toya, Tetsuo Saito, Shinya Shiraishi, Yudai Kai, Ryuji Murakami, Tomohiko Matsuyama, Takahiro Watakabe, Fumi Sakamoto, Noriko Tsuda, Yoshinobu Shimohigashi, Yasuyuki Yamashita, Natsuo Oya
BACKGROUND/AIM: We evaluated the influence of previous treatments on the parametric discrepancies between dose-volume histograms (DVHs) and dose-function histograms (DFHs) generated based on99m Tc-GSA SPECT images of hepatocellular carcinoma (HCC) patients treated with stereotactic body radiation therapy (SBRT). PATIENTS AND METHODS: Twelve patients underwent SBRT at 30-40 Gy. Registration between planning CT and SPECT/CT images was performed, and DFH parameters were calculated as follows: Fx=(sum of the counts within the liver volume receiving a dose of more than x Gy/sum of the counts within the whole liver volume) ×100...
March 2018: Anticancer Research
Rang Wang, Ke Zhou, Qiuping Fan, Haotian Chen, Chengzhong Fan
RATIONALE: Iodine-131 (I-131) is a sensitive marker for the detection of differentiated thyroid cancer (DTC). I-131 whole-body scintigraphy (WBS) has been used widely in evaluation of DTC patient. However, I-131 WBS exists many false-positive uptake of I-131 because radioiodine uptake can also be seen in healthy tissue or in a variety of benign and malignant non-thyroidal tumors. PATIENT CONCERNS: A 44-year-old woman with a papillary thyroid carcinoma for the purpose of ablation therapy after a total thyroidectomy...
February 2018: Medicine (Baltimore)
Nariman Nezami, Nima Kokabi, Juan C Camacho, David M Schuster, Minzhi Xing, Hyun S Kim
INTRODUCTION: There are two different types of Y90 Microspheres, glass and resin, in the market for Y90 radioembolization (Y90-RE). This study aimed to investigate the dose of radiation delivered through glass vs. resin-based Y90-RE to intrahepatic cholangiocarcinoma (ICC). METHODS: In this retrospective study, 10 patients with ICC underwent Y90-RE, five underwent glass (Glass group) and other 5 resin (Resin group) microspheres. Technetium-99m macro-aggregated albumin (Tc-99m MAA) shunt study was performed two weeks before Y90-RE...
January 16, 2018: Nuclear Medicine and Biology
Güler Silov, Zeynep Erdoğan, Murat Erdoğan, Ayşegül Özdal, Hümeyra Gençer, Tayfun Akalın, Seyhan Karaçavuş
Osteopoikilosis is an inherited condition with autosomal dominant trait resulting in sclerotic foci throughout the skeleton. It has been suggested that loss-of-function mutations of LEMD3 gene located on 12q14.3 result in osetopoikilosis. A bp heterozygote deletion was detected in our patient at the cytosine nucleotide at position 1105 with molecular genetic analysis. Although this mutation has not been previously described, it was considered to be the most likely cause of the disease in our patient due to frame shift and premature stop codon formation...
February 1, 2018: Molecular Imaging and Radionuclide Therapy
Francesca Botta, Mahila Ferrari, Carlo Chiesa, Sara Vitali, Francesco Guerriero, Maria Chiara De Nile, Marta Mira, Leda Lorenzon, Massimiliano Pacilio, Marta Cremonesi
PURPOSE: To investigate the clinical implication of performing pre-treatment dosimetry for 90 Y-microspheres liver radioembolization on 99m Tc-MAA SPECT images reconstructed without attenuation or scatter correction and quantified with the patient relative calibration methodology. METHODS: 25 patients treated with SIR-Spheres® at Istituto Europeo di Oncologia and 31 patients treated with TheraSphere® at Istituto Nazionale Tumori were considered. For each acquired 99m Tc-MAA SPECT, four reconstructions were performed: with attenuation and scatter correction (AC_SC), only attenuation (AC_NoSC), only scatter (NoAC_SC) and without corrections (NoAC_NoSC)...
January 31, 2018: Medical Physics
Bhagwant R Mittal, Apurva Sood, Jaya Shukla, Rakhee Vatsa, Priya Bhusari, Ritu Shree, Sahil Mehta, Manoj Goyal, Manish Modi
INTRODUCTION: Parkinson's disease (PD) and Parkinson plus syndromes (PPS) are neurodegenerative movement disorders caused by loss of dopamine in the basal ganglia. The diagnosis of both PD and PPS is complex as it is made solely on the basis of clinical features, with no established imaging modality to aid in the diagnosis. Technetium-99m-labeled tropane derivative (Tc-TRODAT-1) binds to the dopamine transporters present in the presynaptic membrane of the dopaminergic nerve terminal. The aim of this prospective study was to investigate the potential usefulness of Tc-TRODAT-1 imaging in the diagnosis of PD and PPS...
January 29, 2018: Nuclear Medicine Communications
Hendrik Rathke, Ali Afshar-Oromieh, Frederik L Giesel, Christophe Kremer, Paul Flechsig, Sabine Haufe, Walter Mier, Tim Holland-Letz, Maximilian de Bucourt, Thomas Armor, John Babich, Uwe Haberkorn, Clemens Kratochwil
To evaluate the detection rate of bone metastases obtained with the PSMA targeting tracer 99mTc-MIP-1427 as opposed to the conventional bone scan with 99mTc-MDP in a collective of advanced stage patients with known osseous metastasized prostate cancer. Methods: 21 Patients with known metastatic disease were staged with both, conventional bone scan and PSMA-ligand scintigraphy, within a time-frame of <10 days. Imaging included planar whole-body scans and SPECT or SPECT/CT with two bed positions 3 h after injection of either 500-750 MBq 99mTc-MIP-1427 or 600-750 MBq 99mTc-MDP...
January 25, 2018: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
Helmut J M H Dittmann, Daniel Kopp, Juergen Kupferschlaeger, Diana Feil, Gerd Groezinger, Roland Syha, Matthias Weissinger, Christian La Fougère
Hepatopulmonary shunt fraction (LSF)-estimation using Tc-99m-Macroalbumine (MAA) imaging is performed prior to selective internal radiotherapy (SIRT) of the liver in order to reduce risk of pulmonary irradiation burden. Generally, planar scans are acquired after injection of MAA into the hepatic artery. However, validity of this approach is limited by different attenuation of liver and lung tissue as well as inaccurate segmentation of the organs. Aim of this study was to evaluate quantitative SPECT/CT for LSF-assessment in a prospective clinical cohort...
January 25, 2018: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
Xuran Zhang, Linyi You, Shuting Chen, Mengna Gao, Zhide Guo, Jin Du, Jie Lu, Xianzhong Zhang
The chemokine receptor 4 (CXCR4) has been an attractive molecular target for tumor imaging, since it is overexpressed in many tumor types and involved in tumor progression and metastasis. The purpose of this study is to examine the CXCR4 targeting properties of 99m Tc-labeled AMD3465, a small molecule antagonist of CXCR4. 99m Tc-AMD3465 was prepared in high yield (>95%) and stable in mice serum at least for 4 h. In vitro cell binding experiments were performed with CHO (Chinese hamster ovary), MCF-7 (breast cancer) and CHO-CXCR4 (CHO stably transfected to express CXCR4) cell lines...
January 25, 2018: Journal of Labelled Compounds & Radiopharmaceuticals
Derya Çayir, Mine Araz, Ali Yalçindağ, Erman Çakal
OBJECTIVE: The relationship between multiple semiquantitative indices on technetium-99m metoxyisobutylisonitrile (Tc-99m MIBI) parathyroid single-photon emission computed tomography (SPECT) and clinical, laboratory, and radiological data was investigated in primary hyperparathyroidism. PATIENTS AND METHODS: Ninety-three patients who had a histopathologically confirmed single parathyroid adenoma (PT) were enrolled. Regions of interests were drawn around the PT, neighboring thyroid (T), and background in early and late planar images and isocontour regions of interests around the adenoma in SPECT images (PT SPECT)...
January 22, 2018: Nuclear Medicine Communications
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"