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Analytical, Diagnostic and Therapeutic Techniques and Equipment Commons™
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- Antennas (1)
- Attenuation correction (1)
- Four dimensional positron emission tomography magnetic resonance imaging (4D-PET/MRI) (1)
- Head and Neck Cancer (1)
- Highly crosslinked polyethylene (1)
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- Indentation testing (1)
- MRI Engineering (1)
- MRI Hardware (1)
- Magnetic Resonance Imaging (1)
- Magnetic resonance imaging (MRI) (1)
- Mechanical properties (1)
- Microwave Electronics (1)
- Nutrition Screening (1)
- Oxidation (1)
- PG-SGA (1)
- PG-SGA SF (1)
- Phantom (1)
- Positron emission tomography (PET) (1)
- Pt-Global (1)
- Quality of Life (1)
- Radio-Frequency Arrays (1)
- Radio-Frequency Engineering (1)
- Respiratory motion (1)
- Rim fractures (1)
- Total hip arthroplasty (1)
Articles 1 - 4 of 4
Full-Text Articles in Analytical, Diagnostic and Therapeutic Techniques and Equipment
The Application Of Self-Administered Nutrition Screening Tools And Evaluations Of The Impact Of Malnutrition On Quality Of Life In Individuals With Head And Neck Cancer, Mark J. P. Lynch
Electronic Thesis and Dissertation Repository
Abstract
Background: Individuals with head and neck cancer (HNCa) are at an increased risk of malnutrition. Therefore, self-administered nutrition screens which attempt to address their nutritional concerns may yield benefits for treatment outcomes and quality of life (QOL).
Methods: 34 participants (26 men, 8 women) completed one demographic and two QOL surveys, two nutrition self-screening tools, a nutrition assessment and an ease-of-use questionnaire. Results of the screens were compared to those of the assessment, and relationships between QOL, nutrition status, and demographics were examined.
Results: 32.3% of participants were identified as nutritionally compromised. The sensitivity and specificity for the PG-SGA …
Mechanical Properties Of Retrieved Highly Cross-Linked Polyethylene Acetabular Liners In Total Hip Arthroplasty, Gurpreet Singh
Mechanical Properties Of Retrieved Highly Cross-Linked Polyethylene Acetabular Liners In Total Hip Arthroplasty, Gurpreet Singh
Electronic Thesis and Dissertation Repository
Highly cross-linked polyethylene (HXLPE) has replaced the conventional ultra-high-molecular-weight-polyethylene (UHMWPE) as the gold standard bearing surface in total hip arthroplasty (THA) due to superior wear characteristics and survivorship. However, HXLPE has demonstrated poorer mechanical properties, in vivo oxidation, and concerns of rim fractures. The purpose of this project was to study the mechanical properties at the rim of retrieved HXLPE acetabular liners.
We developed a simple technique for measurement of hardness at the rim of irradiated, remelted, HXLPE liners of a specific design. The effect of shelf time on mechanical properties of retrieved liners was determined and showed no correlation …
Developments In Pet-Mri For Radiotherapy Planning Applications, John Christian Patrick
Developments In Pet-Mri For Radiotherapy Planning Applications, John Christian Patrick
Electronic Thesis and Dissertation Repository
The hybridization of magnetic resonance imaging (MRI) and positron emission tomography (PET) provides the benefit of soft-tissue contrast and specific molecular information in a simultaneous acquisition. The applications of PET-MRI in radiotherapy are only starting to be realised. However, quantitative accuracy of PET relies on accurate attenuation correction (AC) of, not only the patient anatomy but also MRI hardware and current methods, which are prone to artefacts caused by dense materials. Quantitative accuracy of PET also relies on full characterization of patient motion during the scan. The simultaneity of PET-MRI makes it especially suited for motion correction. However, quality assurance …
Design Of Radio-Frequency Arrays For Ultra-High Field Mri, Ian R O Connell
Design Of Radio-Frequency Arrays For Ultra-High Field Mri, Ian R O Connell
Electronic Thesis and Dissertation Repository
Magnetic Resonance Imaging (MRI) is an indispensable, non-invasive diagnostic tool for the assessment of disease and function. As an investigational device, MRI has found routine use in both basic science research and medicine for both human and non-human subjects.
Due to the potential increase in spatial resolution, signal-to-noise ratio (SNR), and the ability to exploit novel tissue contrasts, the main magnetic field strength of human MRI scanners has steadily increased since inception. Beginning in the early 1980’s, 0.15 T human MRI scanners have steadily risen in main magnetic field strength with ultra-high field (UHF) 8 T MRI systems deemed to …