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https://www.readbyqxmd.com/read/28629335/utility-of-the-sentinel-node-concept-for-detection-of-lateral-pelvic-lymph-node-metastasis-in-lower-rectal-cancer
#1
Shigehiro Yanagita, Yoshikazu Uenosono, Takaaki Arigami, Yoshiaki Kita, Shinichiro Mori, Shoji Natsugoe
BACKGROUND: There are two lymphatic flows in lower rectal cancer; one along the inferior mesenteric artery and another towards the internal iliac artery. The benefit of dissection of lateral pelvic (LP) lymph nodes (LPLN) remains controversial. This study aimed to clarify the possibility of detecting the sentinel node (SN) of the LP region (LPSN) and examine metastasis, including micrometastasis, using a radio isotope (RI) method. METHODS: In total, 62 patients with clinical (c)T1-T4 rectal cancer were enrolled in this study (11, 16 and 35 patients had tumor located in the upper, middle and lower rectal third, respectively)...
June 19, 2017: BMC Cancer
https://www.readbyqxmd.com/read/28625511/lung-fluid-clearance-in-chronic-heart-failure-patients
#2
Dani-Louise Dixon, Carmine G De Pasquale, Mark D Lawrence, Elena Cavallaro, Vito Rubino, Andrew D Bersten
Chronic elevation of pulmonary microvascular pressure (Pmv) consistently leads to alveolocapillary barrier thickening and reduction in the filtration coefficient. In animal models of chronic heart failure (CHF) the lung remains dry despite hydrostatic forces. As fluid flux is bi-directional, it has been postulated that an increase in alveolar fluid clearance may facilitate the dry lung when Pmv is chronically elevated. In this study we aimed to examine alveolar fluid clearance in ambulatory patients with CHF secondary to left ventricular (LV) systolic dysfunction compared against non-CHF controls...
May 26, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28624009/measuring-hepatic-functional-reserve-using-t1-mapping-of-gd-eob-dtpa-enhanced-3t-mr-imaging-a-preliminary-study-comparing-with-99m-tc-gsa-scintigraphy-and-signal-intensity-based-parameters
#3
Masataka Nakagawa, Tomohiro Namimoto, Kie Shimizu, Kosuke Morita, Fumi Sakamoto, Seitaro Oda, Takeshi Nakaura, Daisuke Utsunomiya, Shinya Shiraishi, Yasuyuki Yamashita
PURPOSE: To determine the utility of liver T1-mapping on gadolinium-ethoxybenzyl-diethylenetriamine-pentaacetic acid (Gd-EOB-DTPA) enhanced magnetic resonance (MR) imaging for the measurement of liver functional reserve compared with the signal intensity (SI) based parameters, technetium-99m-galactosyl serum albumin ((99m)Tc-GSA) scintigraphy and indocyanine green (ICG) clearance. MATERIALS AND METHODS: This retrospective study included 111 patients (Child-Pugh-A 90; -B 21) performed with both Gd-EOB-DTPA enhanced liver MR imaging and (99m)Tc-GSA (76 patients with ICG)...
July 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28618064/technetium-99m-radiochemistry-for-pharmaceutical-applications
#4
REVIEW
Dionysia Papagiannopoulou
(99m) Tc is a widely used radionuclide and the development of (99m) Tc imaging agents continues to be in demand. This overview discusses basic principles of (99m) Tc radiopharmaceutical preparation and design, and focuses on the technetium-99m radiochemistry relevant to its medical applications. The (99m) Tc complexes are described based on the most typical examples in each category, keeping up with the state-of-the-art in the field. In addition, the main current strategies to develop targeted (99m) Tc radiopharmaceuticals are summarized...
June 15, 2017: Journal of Labelled Compounds & Radiopharmaceuticals
https://www.readbyqxmd.com/read/28614625/modified-sentinel-lymph-node-technique-combined-with-endoluminal-loco-regional-resection-for-the-treatment-of-rectal-tumors-a-fourteen-year-experience
#5
Silvia Quaresima, Alessandro M Paganini, Giancarlo D'Ambrosio, Pietro Ursi, Andrea Balla, Emanuele Lezoche
AIM: After Endoluminal Loco-Regional Resection (ELRR) by Transanal Endoscopic Microsurgey (TEM) the N parameter may remain undefined. Nucleotide-Guided Mesorectal Excision (NGME) improves the lymph nodes harvest. The aim of the present study is to evaluate the long term oncological results after ELRR with NGME. METHOD: A total of 57 patients were enrolled over the period January 2001 to June 2015.ed. All patients underwent ELRR by TEM. Prior to surgery, 99m-Technetium-marked nanocolloid was injected in the peritumoral submucosa...
June 14, 2017: Colorectal Disease: the Official Journal of the Association of Coloproctology of Great Britain and Ireland
https://www.readbyqxmd.com/read/28612866/technetium-99m-complexes-of-l-arginine-derivatives-for-targeting-amino-acid-transporters
#6
Maurício Morais, Vera F C Ferreira, Flávio Figueira, Filipa Mendes, Paula Raposinho, Isabel Santos, Bruno L Oliveira, João D G Correia
Although relevant from the clinical point of view, radiotracers targeting cationic amino acid transporters are relatively unexplored and, in particular, no metal-based radiotracers are known. The rare examples of complexes recognized by amino acid transporters, namely by the Na(+)-independent neutral l-type amino acid transporter 1 (LAT1), are (99m)Tc(i)/Re(i) compounds. Herein, we describe conjugates comprising a pyrazolyl-diamine chelating unit and the cationic amino acid l-arginine (l-Arg) linked by a propyl (L1) or hexyl linker (L2), which allowed the preparation of stable complexes of the type fac-[(99m)Tc(CO)3(k(3)-L)](+) (Tc1, L = L1; Tc2, L = L2) and of the respective surrogates Re1 and Re2...
June 14, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28611963/pelvic-insufficiency-fracture-in-severe-osteoporosis-patient
#7
Woong Chae Na, Sang Hong Lee, Sung Jung, Hyun Woong Jang, Suenghwan Jo
PURPOSE: To evaluate clinical features and the effect of parathyroid hormone (PTH) on treatment outcomes of patients with pelvic insufficiency fractures. MATERIALS AND METHODS: Fifteen patients diagnosed with pelvic insufficiency fractures were evaluated retrospectively. All patients had osteoporosis with mean lumbar T score of -3.9 (range, -3.1 to -6.4) and the mean age was 76.5 years. In all cases, simple radiography and computed tomography was used for final diagnosis; additional magnetic resonance imaging and technetium bone scans were used to confirm the diagnosis in 2 and 6 patients, respectively...
June 2017: Hip & Pelvis
https://www.readbyqxmd.com/read/28611846/safety-of-allogeneic-canine-adipose-tissue-derived-mesenchymal-stem-cell-intraspinal-transplantation-in-dogs-with-chronic-spinal-cord-injury
#8
Cláudia Cardoso Maciel Escalhão, Isalira Peroba Ramos, Camila Hochman-Mendez, Tais Hanae Kasai Brunswick, Sergio Augusto Lopes Souza, Bianca Gutfilen, Regina Coeli Dos Santos Goldenberg, Tatiana Coelho-Sampaio
This is a pilot clinical study primarily designed to assess the feasibility and safety of X-ray-guided percutaneous intraspinal injection of allogeneic canine adipose tissue-derived mesenchymal stem cells in dogs with chronic spinal cord injury. Six dogs with chronic paraplegia (≥six months) were intraparenchymally injected with allogeneic cells in the site of lesion. Cells were obtained from subcutaneous adipose tissue of a healthy dog, cultured to passage 3, labeled with (99m)Technetium, and transplanted into the lesion by percutaneous X-ray-guided injection...
2017: Stem Cells International
https://www.readbyqxmd.com/read/28595542/synthesis-of-99mtc-rifabutin-a-potential-tuberculosis-radiodiagnostic-agent
#9
Syed Qaiser Shah, Mamoona Alam
BACKGROUND: Rifabutin (RFN) is bactericidal antibiotic with a very broad spectrum of activity against gram positive & gram negative organisms including Pseudomonas aeruginosa and specifically Mycobacterium tuberculosis. OBJECTIVE: RFN inhibits DNA dependent RNA polymerase activity in susceptible cells. In the instant work, the therapeutic characteristics of RFN were intended for diagnostic rationale by labeling it with 99mTc (Technetium-99m). The 99mTc labeled RFN (99mTc-RFN) was investigated for labeling capacity, steadiness in saline & serum, in vitro Mycobacterium tuberculosis (MBT) uptake & distribution in MBT stained animal model rats...
June 5, 2017: Infectious Disorders Drug Targets
https://www.readbyqxmd.com/read/28591006/assessment-of-functional-liver-reserve-old-and-new-in-99mtc-sulfur-colloid-scintigraphy
#10
Manuela M Matesan, Stephen R Bowen, Tobias R Chapman, Robert S Miyaoka, James W Velez, Michele F Wanner, Matthew J Nyflot, Smith Apisarnthanarax, Hubert J Vesselle
PURPOSE: A semiquantitative assessment of hepatic reticuloendothelial system function using colloidal particles scintigraphy has been proposed previously as a surrogate for liver function evaluation. In this article, we present an updated method for the overall assessment of technetium-99m (Tc)-sulfur colloid (SC) biodistribution that combines information from planar and attenuation-corrected Tc-SC single-photon emission computed tomography (SPECT) images. The imaging protocol described here was developed as an easy-to-implement method to assess overall and regional liver function changes associated with chronic liver disease...
June 6, 2017: Nuclear Medicine Communications
https://www.readbyqxmd.com/read/28586008/a-nanobody-targeting-carcinoembryonic-antigen-as-a-promising-molecular-probe-for-non-small-cell-lung-cancer
#11
Hao Wang, Ai-Min Meng, Sheng-Hua Li, Xiao-Liang Zhou
Carcinoembryonic antigen (CEA) is a biomarker and therapy target for non‑small cell lung cancer (NSCLC), which is the most common type of lung cancer. Nanobodies with high target specificity are promising candidates to function as anti‑CEA probes. In the present study, the targeting effects of an anti‑CEA nanobody obtained from phage display were investigated using technetium‑99 m (99mTc) and fluorescence labeling. In vitro binding and immunofluorescent staining assays, as well as in vivo blood clearance and biodistribution assays were performed...
July 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28584569/angiographic-diagnosis-of-meckel-s-diverticulum-in-an-adult-patient-with-negative-scintigraphy
#12
Mark Kovacs, Jonathan Botstein, Stuart Braverman
A Meckel's diverticulum was diagnosed by mesenteric angiography in a 34 year-old patient who presented with hematochezia and dropping hemoglobin. The case demonstrates the challenges often encountered in workup of occult gastrointestinal (GI) bleeding, and shows that angiographic diagnosis of Meckel's diverticulum is possible, even in the absence of angiographic evidence of active extravasation. Our patient had a previous non-diagnostic workup including upper and lower endoscopy, videocapsulography, and Technetium-99m pertechnetate (Tc-99m) scintigraphy...
March 2017: Journal of Radiology Case Reports
https://www.readbyqxmd.com/read/28584413/idiopathic-condylar-resorption-the-current-understanding-in-diagnosis-and-treatment
#13
REVIEW
Andrew Young
Idiopathic condylar resorption (ICR) is a condition with no known cause, which manifests as progressive malocclusion, esthetic changes, and often pain. Cone-beam computed tomography and magnetic resonance imaging are the most valuable imaging methods for diagnosis and tracking, compared to the less complete and more distorted images provided by panoramic radiographs, and the higher radiation of (99m)technetium-methylene diphosphonate. ICR has findings that overlap with osteoarthritis, inflammatory arthritis, physiologic resorption/remodeling, congenital disorders affecting the mandible, requiring thorough image analysis, physical examination, and history-taking...
April 2017: Journal of Indian Prosthodontic Society
https://www.readbyqxmd.com/read/28583518/cystatin-c-based-equation-for-predicting-the-glomerular-filtration-rate-in-kidney-transplant-recipients
#14
Y Yang, K Y Kim, I Hwang, T Yim, W Do, M J Kim, S Lee, H-Y Jung, J-Y Choi, S-H Park, Y-L Kim, C-D Kim, J-H Cho
BACKGROUND: Precise monitoring of the glomerular filtration rate (GFR) is needed to estimate the allograft function in kidney transplant recipients (KTRs). The GFR is widely estimated with the use of formulas based on serum cystatin C (SCys) and serum creatinine (SCr) levels. We compared the efficacy of SCys-based equations with that of SCr-based equations to predict the allograft function. METHODS: We calculated the Modification of Diet in Renal Disease (MDRD), Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI Cr), CKD-EPI creatinine-cystatin C (CKD-EPI Cr/Cys), and CKD-EPI cystatin C (CKD-EP ICys) equations in 70 KTRs...
June 2017: Transplantation Proceedings
https://www.readbyqxmd.com/read/28579328/the-evaluations-of-99m-tc-cyclopentadienyl-tricarbonyl-triphenyl-phosphonium-cation-for-multidrug-resistance
#15
Shuting Chen, Ying Zhang, Xiaoyan Li, Hongmei Jia, Jie Lu
A triphenylphosphonium cation, [(99m)Tc]Technetium cyclopentadienyltricarbonyl-6-hexanoyl-triphenylphosphonium cation ([(99m)Tc]3) was prepared to target multidrug resistance (MDR). The radiotracer was evaluated in the MDR-negative MCF-7 and MDR-positive MCF-7/ADR cell lines in vitro, as well as animal models in vivo. [(99m)Tc]3 was proofed to be a substrate of P-glycoprotein and multidrug resistant protein 1, and showed a higher accumulation in the MDR-negative MCF-7 cells compared to (99m)Tc-sestamibi in vitro...
May 17, 2017: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/28573537/derivation-of-new-equations-to-estimate-glomerular-filtration-rate-in-pediatric-oncology-patients
#16
Vanessa E Millisor, Jessica K Roberts, Yilun Sun, Li Tang, Vinay M Daryani, David Gregornik, Shane J Cross, Deborah Ward, Jennifer L Pauley, Alejandro Molinelli, Rachel C Brennan, Clinton F Stewart
BACKGROUND AND OBJECTIVE: Monitoring renal function is critical in treating pediatric patients, especially when dosing nephrotoxic agents. We evaluated the validity of the bedside Schwartz and Brandt equations in pediatric oncology patients and developed new equations for estimated glomerular filtration rate (eGFR) in these patients. METHODS: A retrospective analysis was conducted comparing eGFR using the bedside Schwartz and Brandt equations to measured GFR (mGFR) from technetium-99m diethylenetriamine pentaacetic acid ((99m)Tc-DTPA) between January 2007 and August 2013...
June 2, 2017: Pediatric Nephrology: Journal of the International Pediatric Nephrology Association
https://www.readbyqxmd.com/read/28571944/indocyanine-green-versus-radiotracer-%C3%A2-blue-dye-for-sentinel-lymph-node-mapping-in-stage-ib1-cervical-cancer-2-cm
#17
Giampaolo Di Martino, Cinzia Crivellaro, Elena De Ponti, Beatrice Bussi, Andrea Papadia, Ignacio Zapardiel, Enrico Vizza, Federica Elisei, Maria Dolores Diestro, Luca Locatelli, Maria Luisa Gasparri, Paolo Di Lorenzo, Michael Mueller, Alessandro Buda
STUDY OBJECTIVE: To compare sentinel lymph node (SLN) mapping in women with cervical cancer stage > IB1 (tumor > 2 cm) by using indocyanine green (ICG) versus the standard radioisotope technetium 99m radiocolloid (Tc99(m)) radiotracer ± blue-dye technique. DESIGN: European multicenter, retrospective observational study (Canadian Task Force Classification II-2) SETTING: Four academic medical centers PATIENTS: 95 women with stage IB1 (> 2 cm) who underwent SLN mapping with Tc99(m) ± blue dye or ICG and radical hysterectomy INTERVENTION: Detection rate and bilateral mapping rate of ICG were compared with those obtained using the standard Tc99(m) radiotracer ± blue dye...
May 29, 2017: Journal of Minimally Invasive Gynecology
https://www.readbyqxmd.com/read/28559948/bone-scintigraphy-and-tenofovir-induced-osteomalacia-in-chronic-hepatitis-b
#18
Alex Khoo Cheen Hoe, Lee Yeong Fong
Tenofovir, used in the treatment of chronic hepatitis B and HIV, is known for its side effects on the kidneys and bones. We share interesting images of a patient with tenofovir-induced osteomalacia on Technetium-99 m hydroxymethyelene (Tc-99 m HDP) bone scintigraphy. Pattern recognition of this bone scintigraphy and correlation with the clinical history is essential to avoid misdiagnosis.
June 2017: Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/28559941/comparison-of-two-different-segmentation-methods-on-planar-lung-perfusion-scan-with-reference-to-quantitative-value-on-spect-ct
#19
Minseok Suh, Yeon-Koo Kang, Seunggyun Ha, Yong-Il Kim, Jin Chul Paeng, Gi Jeong Cheon, Samina Park, Young Tae Kim, Dong Soo Lee, E Edmund Kim, June-Key Chung
PURPOSE: Until now, there was no single standardized regional segmentation method of planar lung perfusion scan. We compared planar scan based two segmentation methods, which are frequently used in the Society of Nuclear Medicine, with reference to the lung perfusion single photon emission computed tomography (SPECT)/computed tomography (CT) derived values in lung cancer patients. METHODS: Fifty-five lung cancer patients (male:female, 37:18; age, 67.8 ± 10...
June 2017: Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/28555448/new-synthesis-route-of-active-substance-d-l-hmpao-for-preparation-technetium-tc99m-exametazime
#20
Justyna Pijarowska-Kruszyna, Urszula Karczmarczyk, Antoni Włodzimierz Jaroń, Ewa Laszuk, Marcin Radzik, Piotr Garnuszek, Renata Mikołajczak
BACKGROUND: Technetium Tc99m Exametazime (99mTc-HMPAO) is currently used as a radiopharmaceutical for determining regional cerebral blood flow and for the labelling of autologous leucocytes for infection and inflammation imaging. The HMPAO ligand exists in two diastereomeric forms: d,l and meso. Usually, the substance is obtained in low chemical yield in a time consuming procedure. Furthermore, the final product still contains some amounts of the meso-form. The aim of this study was to develop the efficient, reliable and fast method for isolation of the d,l-HMPAO, which would provide the ligand with high purity and free from the meso-diastereomer...
2017: Nuclear Medicine Review. Central & Eastern Europe
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