Multiscale characterization and constitutive parameters identification of polyamide (PA12) processed via selective laser sintering

This study is focused on multiscale characterization and constitutive parameters identification of selectively laser sintered PA12 specimens. The process parameters and change in crystallinity due to 3D printing were identified via differential scanning calorimetry (DSC). Tension, compression, shear, flexural and fracture tests performed on samples fabricated, both in 0° and 90° directions reveal that the tensile toughness of samples printed in 0° orientation, outperform samples printed in 90° orientation by an average of 24%. Cryogenically fractured samples were analyzed via SEM and micro-computed tomography to analyze 2D/3D defects and correlate the microstructure with macroscopic properties. The constitutive parameters for a strain-rate and temperature-dependent Three Network (TN) material model were identified using the measured mechanical properties. Furthermore, mechanical response of micro-architected Kelvin lattice structure was analyzed by Finite Element Method employing the TN constitutive model and the predictions were corroborated with measurements.Graphical abstract
Source: Polymer Testing - Category: Chemistry Source Type: research

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ConclusionsThe variability of radiocholine uptake in adrenal glands depends probably on overall body metabolism and hypophyseal function expressed by statistically significant correlation with liver and pituitary gland uptake.Predominant focal or mixed with focal areas uptake patterns on positron emission tomography in normal in computed tomography adrenal glands should be assessed with caution to avoid a diagnostic mistake.
Source: Revista Espanola de Medicina Nuclear e Imagen Molecular - Category: Nuclear Medicine Source Type: research
This study aimed to analyse the features of lymphadenopathy and estimate the role of imaging methods, including computed tomography (CT) and positron emission tomography-CT (PET/CT), in the diagnosis of lymphadenopathy in patients with POEMS syndrome. We conducted a retrospective analysis of 23 patients with confirmed POEMS syndrome. All of the patients received chest and abdominal CT scan and/or superficial ultrasound examinations. Four patients underwent PET/CT examinations, and 6 patients received lymph node biopsies. Enlarged lymph nodes (short diameter ≥ 1 cm) were found in 48% (11/23) of patients, but only 1 patie...
Source: International Journal of Clinical and Experimental Pathology - Category: Pathology Authors: Tags: Int J Clin Exp Pathol Source Type: research
CONCLUSIONS: The correct indication (identifying patients at risk) and individualization of treatment, in which endovascular techniques are the first-line option, have significantly improved morbidity and mortality outcomes in our hospital. PMID: 32057214 [PubMed - as supplied by publisher]
Source: International Angiology - Category: Cardiology Tags: Int Angiol Source Type: research
Authors: Ventura L, Scarlattei M, Gnetti L, Silini EM, Rossi M, Tiseo M, Sverzellati N, Bocchialini G, Musini L, Balestra V, Ampollini L, Rusca M, Carbognani P, Ruffini L Abstract OBJECTIVE: To evaluate the prognostic role of maximum standardized uptake value (SUVmax), metabolic tumor volume (MTV), and total lesion glycolysis (TLG) measured by FDG-positron emission tomography (PET)/computed tomography (CT) in patients with primary lung adenocarcinoma undergoing surgical resection. METHODS: All consecutive patients undergoing curative surgery for primary lung adenocarcinoma at the Thoracic Surgery Unit of the Un...
Source: Tumori - Category: Cancer & Oncology Tags: Tumori Source Type: research
Publication date: April 2020Source: Asia-Pacific Journal of Sports Medicine, Arthroscopy, Rehabilitation and Technology, Volume 20Author(s): Adinun Apivatgaroon, Suthee Tharakulphan, Pinkawas Kongmalai, Bancha ChernchujitAbstractBackgroundA hooked acromion on an outlet view and a keeled acromion on Rockwood tilt radiographs are associated with rotator cuff tears. The identification of the acromial morphology may be helpful for acromioplasty planning with regarding the acromial types.MethodsDescriptive Laboratory Study. Three-dimensional computed tomography scans models of 108 shoulders in 91 patients with; (1) Normal shoul...
Source: Asia-Pacific Journal of Sports Medicine, Arthroscopy, Rehabilitation and Technology - Category: Sports Medicine Source Type: research
We report herein a case of mediastinal actinomycosis mimicking lung malignanc y presented with recurrent lymphocyte‐predominant pleural fluid exudate. In patients with a recurrent or unexplained exudative pleural effusion, it may be worthwhile to consider a hidden foci of actinomycosis.
Source: Respirology Case Reports - Category: Respiratory Medicine Authors: Tags: Case Report Source Type: research
ConclusionsTotal shoulder replacement in B2 glenoid is technically demanding. Our radiological results show favourable outcome in terms of correction of gelenoid retroversion and eliminating posterior instability using wedge glenoid component.Level of EvidenceIV
Source: Journal of Clinical Orthopaedics and Trauma - Category: Orthopaedics Source Type: research
Dr Oliver Flower Classic CT brain pathology Andrew Dixon from Radiopaedia covers all the common pathology seen on CT scans in critical care.
Source: Life in the Fast Lane - Category: Emergency Medicine Authors: Tags: Clinical Crit Care Radiology Andrew Dixon Brain pathology CT brain CT scan CTB CTH Source Type: blogs
We reported a case of intermittent massive upper gastrointestinal bleeding in a 33-year-old man with cholangiocarcinoma who underwent surgical resection followed by chemoradiation. A portoduodenal fistula due to chronic duodenal ulceration was identified. The bleeding was successfully controlled by endoscopic ultrasound-guided coil placement through the duodenal bulb using the anchoring technique. Follow-up endoscopy and computed tomography scan showed multiple coil placements between a part of the portal vein and the duodenal bulb without any evidence of portal vein thrombosis. There were no complications, and bleeding di...
Source: Clinical Endoscopy - Category: Gastroenterology Tags: Clin Endosc Source Type: research
Authors: Aoki S, Nagashima K, Furuta M, Makioka K, Fujita Y, Saito K, Kashima T, Nakajima N, Ikota H, Higuchi O, Ikeda Y Abstract We herein report the case of a 65-year-old woman diagnosed with myasthenia gravis (MG) after complaining of double vision. The patient had anti-low-density lipoprotein receptor-related protein 4 (LRP4) antibody in her serum, although antibodies against the acetylcholine receptor and muscle-specific tyrosine kinase were not detected. Chest computed tomography showed an anterior mediastinal tumor with a high uptake on fluorodeoxyglucose-positron emission tomography. Endoscopic thymectomy s...
Source: Internal Medicine - Category: Internal Medicine Tags: Intern Med Source Type: research
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