Open AccessThe effect of X‐ray beam distortion on the Edwards Sapien XT ™ trans‐catheter aortic valve replacement prosthesis
Author(s) -
Crowhurst James A.,
Poon Karl K.,
Murdoch Dale,
Incani Alexander,
Raffel Owen C.,
Liddicoat Annelise,
Walters Darren
Publication year - 2015
Publication title -
journal of medical radiation sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.484
H-Index - 18
eISSN - 2051-3909
pISSN - 2051-3895
DOI - 10.1002/jmrs.131
Subject(s) - aortic valve , fluoroscopy , prosthesis , catheter , medicine , rotation (mathematics) , coaxial , valve replacement , implant , biomedical engineering , materials science , radiology , surgery , computer science , artificial intelligence , stenosis , telecommunications
Profiling the Aortic root perpendicular to the fluoroscopic image plane will achieve a more successful implant position for trans‐catheter aortic valve replacement ( TAVR ). This study aimed to investigate whether the divergent nature of the X‐ray beam from the C‐arm altered the appearance of the TAVR device. Methods Under bench‐top testing, a 23, 26 and 29 mm Edwards Sapien XT valve was positioned coaxially at the bottom of a fluoroscopic image utilising 22 and 32 cm fields of view ( FOV ). The table was then moved so that the valve was positioned at the top of the image. The valve's appearance was scored using a previously published three tier classification tool (excellent, satisfactory and poor) and quantified with measurements. The number of degrees of C‐arm rotation that were required to bring the valve back to a coaxial appearance was recorded. Results When using the 32 cm FOV , the valve's appearance changes from excellent to satisfactory. When a 22 cm FOV was used, the change is less marked. More C‐arm rotation is required to bring the appearance back to coaxial with the 32 cm FOV . Conclusion Not maintaining the valve in the centre of the image can distort the valves appearance. This has the potential to affect the final implantation depth.