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Can Computed Tomography Angiography Image Acquisition be Improved through Analysing Heartflow CT-Fractional Flow Reserve Rejections?
EP33157
Poster Title: Can Computed Tomography Angiography Image Acquisition be Improved through Analysing Heartflow CT-Fractional Flow Reserve Rejections?
Submitted on 16 Oct 2020
Author(s): JCR Wadkin, A Delport, F Mugabe, V Majuran
Affiliations: Kingston Hospital NHS Foundation Trust
This poster was presented at BIR Annual Congress 2020
Poster Views: 47
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Poster Information
Abstract: In patients with stable or suspected ischaemic heart disease, non-invasive functional imaging is recommended to ascertain the severity of coronary arterial disease. If vessel disease is noted on coronary computed tomography angiography (CCTA), these images can then be sent for further functional analysis.

Heartflow uses CCTA images to perform CT-fractional flow reserve (CT-FFr) analysis, providing functional information regarding the ischaemic disease. This information can then be utilised in guiding subsequent investigation and management strategies. High quality image acquisition during initial CCTA imaging is extremely important to enable CT-FFr analysis to be performed.

A retrospective analysis was performed of the CCTA images acquired which were sent to Heartflow for CT-FFr analysis. The data was collected at our large district general hospital over a 10 month period. The total number of patient images sent to Heartflow for analysis in this time period was 85. Of the total number of patient images sent, 22% (19) were rejected and returned without functional CT-FFr analysis. Of the returned images, 63% (12) were rejected due to misalignment. Other causes for rejection included motion 16% (3), pixel spacing 5% (1), noise 5% (1), stent 5% (1) and a clipped coronary artery 5% (1).

CT-FFr provides valuable functional data. High quality image acquisition during initial CCTA imaging is essential to enable CT-FFr analysis to be performed. Further radiographer training with greater heart rate control aiming to reduce misalignment errors may facilitate improved image acquisition and fewer image rejections.
Summary: Can Coronary Computed Tomography Angiography Image Acquisition be Improved through Analysing Heartflow CT-Fractional Flow Reserve Rejections?Report abuse »
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