Publications by authors named "Robert A Shields"
Objective: Traditional supine imaging with arms raised for myocardial perfusion imaging (MPI) is uncomfortable for many cardiac patients. Seated imaging with arms resting at shoulder level is an attractive alternative. This study aimed to compare the patient comfort and image appearance of seated MPI with traditional supine MPI.
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- The study investigates how mis-registration between emission and transmission scans affects the interpretation of myocardial perfusion imaging, particularly concerning anterior/apical defects.
- It found that while attenuation correction reduced the size of inferior wall defects, it often led to an increase in anterior/apical defects, especially in women.
- Correcting for this mis-registration significantly lowered the incidence of these anterior/apical defects, emphasizing the importance of thorough three-dimensional evaluation before final reports.
Objectives: Artefacts caused by tissue attenuation can create problems in the interpretation of myocardial perfusion studies. This study aimed to determine if attenuation correction using the 'Hawkeye' low-resolution X-ray computed tomography facility attached to a GE Millennium VG gamma camera reduced attenuation artefacts in our patient group. This technique offers potential advantages over isotope transmission methods of attenuation correction because of the lack of noise in the transmission images.
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