The Influence of Patient Positioning in Breast CT on Breast Tissue Coverage and Patient Comfort

Abstract

Purpose: The presented study aimed at optimizing a patient table design for breast CT (BCT) systems with respect to breast tissue coverage and patient comfort. Additionally, the benefits and acceptance of an immobilization device for BCT using underpressure were evaluated. Materials and Methods: Three different study parts were carried out. In a positioning study women were investigated on an MRI tabletop with exchangeable inserts (flat and cone-shaped with different opening diameters) to evaluate their influence on breast coverage and patient comfort in various positioning alternatives. Breast length and volume were calculated to compare positioning modalities including various opening diameters and forms. In the second study part, an underpressure system was tested for its functionality and comfort on a stereotactic biopsy table mimicking a future CT scanner table. In the last study part, this system was tested regarding breast tissue coverage. Results: Best results for breast tissue coverage were shown for cone-shaped table inserts with an opening of 180 mm. Flat inserts did not provide complete coverage of breast tissue. The underpressure system showed robust function and tended to pull more breast tissue into the field of view. Patient comfort was rated good for all table inserts, with highest ratings for cone-shaped inserts. Conclusion: Cone-shaped tabletops appeared to be adequate for BCT systems and to allow imaging of almost the complete breast. An underpressure system proved promising for the fixation of the breast during imaging and increased coverage. Patient comfort appears to be adequate.

Clinical assessment of image quality, usability and patient comfort in dedicated spiral breast computed tomography

“…Another benefit of B-CT is that no compression is needed to perform the scan, which is a common complaint of women undergoing mammography. While older womenwho more frequently suffered from impaired mobilitywere slightly less comfortable, in accordance with prior studies, 9,10,32 the majority of women reported high levels of comfort. Hence, B-CT could constitute an alternative imaging modality in the screening setting for women who would otherwise deny breast cancer screening due to breast compression and mastodynia during mammography.…”

Motion artifacts assessment and correction using optical tracking in synchrotron radiation breast CT

“…Second, synchrotron bCT systems generally feature a better spatial resolution, up to 7 lp/mm at 10% of the modulation transfer function, or ∼0.1 mm at full width at half maximum (FWHM) of the point spread function, 24 being more sensitive to small displacements. To mitigate these effects, the usefulness of dedicated breast immobilizer systems, both for conventional and synchrotron‐based setups, has been proposed 25 , 26 but, at present, such systems are seldom used in clinical practice.…”