80 research outputs found
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Radiographer reporting: A literature review to support cancer workforce planning in England
YesObjective: Clinical Imaging contributes to screening, diagnosis, planning and monitoring of treatment
and surveillance in cancer care. This literature review summarises evidence about radiographer reporting
to help imaging service providers respond to Health Education England's 2017 Cancer Workforce Plan
project to expand radiographer reporting in clinical service provision.
Key findings: Papers published between 1992 and 2018 were reviewed (n ¼ 148). Evidence related to
dynamic examinations (fluoroscopy, ultrasound) and mammography was excluded. Content was analysed
and summarised using the following headings: clinical scope of practice, responsibilities, training,
assessment, impact in practice and barriers to expansion.
Radiographer reporting is well established in the United Kingdom. Scope of practice varies individually
and geographically. Deployment of appropriately trained reporting radiographers is helping the NHS
maintain high quality clinical imaging service provision and deliver a cost-effective increase in diagnostic
capacity.
Conclusion: Working within multiprofessional clinical imaging teams, within a defined scope of practice
and with access to medical input when required, reporting radiographers augment capacity in diagnostic
pathways and release radiologist time for other complex clinical imaging responsibilities
Peak Stir Zone Temperatures during Friction Stir Processing
The stir zone (SZ) temperature cycle was measured during the friction stir processing (FSP) of NiAl bronze plates. The FSP was conducted using a tool design with a smooth concave shoulder and a 12.7-mm step-spiral pin. Temperature sensing was accomplished using sheathed thermocouples embedded in the tool path within the plates, while simultaneous optical pyrometry measurements of surface temperatures were also obtained. Peak SZ temperatures were 990 ⁰Cto 1015 ⁰C (0.90 to 0.97 TMelt) and were not affected by preheating to 400⁰C, although the dwell time above 900 ⁰C was increased by the preheating. Thermocouple data suggested little variation in peak temperature across the SZ, although thermocouples initially located on the advancing sides and at the centerlines of the tool traverses were displaced to the retreating sides, precluding direct assessment of the temperature variation across the SZ. Microstructure-based estimates of local peak SZ temperatures have been made on these and on other similarly processed materials. Altogether, the peak-temperature determinations from these different measurement techniques are in close agreement
Use of a trabecular metal implant in ankle arthrodesis after failed total ankle replacement: A short-term follow-up of 13 patients
Patients and methods 13 patients with a migrated or loose total ankle implant underwent arthrodesis with the use of a retrograde intramedullary nail through a trabecular metal Tibial Cone. The mean follow-up time was 1.4 (0.6-3.4) years. Results At the last examination, 7 patients were pain-free, while 5 had some residual pain but were satisfied with the procedure. 1 patient was dissatisfied and experienced pain and swelling when walking. The implant-bone interfaces showed no radiographic zones or gaps in any patient, indicating union. Interpretation The method is a new way of simplifying and overcoming some of the problems of performing arthrodesis after failed total ankle replacement
The Morphology, Crystallography, and Chemistry of Phases in Wire-Arc Additively Manufactured Nickel Aluminum Bronze
A new Wire-Arc Additive Manufacturing (WAAM) technique is used to produce Nickel Aluminum Bronze (NAB) components for marine applications in view to mitigate the problems that typically arise in a cast microstructure. In cast condition, the alloy typically exhibits microstructure that consists of an FCC Cu-rich solid solution (or α-phase), some retained β-phase, and several intermetallic phases collectively referred to as κ-phase. This study aims to characterize the crystal structures of the various κ-phases or precipitates, their distribution, morphology, orientation relationships with the α-matrix, and their chemical compositions in WAAM-NAB alloy using electron microscopy. The precipitation of κ-phase differs in morphology and chemical composition to those present in a cast NAB. In addition, some uniaxial tensile coupons were machined out of the WAAM-NAB samples, where tensile mechanical properties are superior to those of cast NAB. The effects of microstructural differences in both alloys on the mechanical properties are correlated
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