Periodic Reporting for period 1 - VASCOLL (QSM in plaque vulnerability diagnosis – a software tool for early clinical assessment)
Período documentado: 2022-09-01 hasta 2024-02-29
Stroke is the leading cause of disability and the third leading cause of death in the Western World. Over 50% of strokes occur in asymptomatic patients and therefore better indicators of the disease are required. These acute asymptomatic cerebrovascular events are due to vulnerable plaque rupture leading to thromboembolic events, stroke, and/or sudden death. From our work to-date as part of ERC Starting grant FibreRemodel, we have found that that most significant contributor to rupture strength of a plaque is the underlying collagen fibres within this tissue, particularly within the fibrous plaque cap. The underlying structure of the carotid plaque may therefore be used to determine the risk of vulnerable plaque rupture. However, a non-invasive diagnostic technique, which uses knowledge of in vivo arterial collagen content, has yet to be developed. VASCOLL will generate the first software tool that can inform on plaque vulnerability in a non-invasive way, enabling early diagnosis of the predisposition of a carotid plaque to rupture and facilitating the selection of the optimum treatment minimising the need for surgery and healthcare-associated costs. This approach will offer a number of significant benefits over current approaches to vulnerable plaque identification. Firstly, this technique will be the first ex vivo and in vivo application of the QSM technique to human arteries and carotid plaques to exploit the sensitivity of magnetic susceptibility to collagen content in arteries. Secondly, this technique is relatively easy and efficient to translate in vivo. Given that this method determines the underlying plaque and vessel structure, not merely level of stenosis, VASCOLL will transform how vulnerable carotid plaques are identified and treated
We have demonstrated the technical feasibility of VASCOLL in ex vivo and in vivo tissues
o Ex vivo work completed showing QSM sensitivity to collagen and elastin content
o Susceptibility anisotropy in arterial tissue established
o We have optimised QSM sequence and translated it for use in two clinical scanners and susceptibility values show no significant difference between the two scanners.
o Ex vivo work completed showing QSM sensitivity to collagen and elastin content
o Susceptibility anisotropy in arterial tissue established
o We have optimised QSM sequence and translated it for use in two clinical scanners and susceptibility values show no significant difference between the two scanners.
We have optimised a clinical QSM sequence for imaging carotid arteries and translated it for use in two clinical scanners and susceptibility values show no significant difference between the two scanners.