Automatic determination of optimal view for the visualization of coronary lesions by rotational X-ray angiography

Feuillâtre, Hélène; Sanokho, B.; Nunes, Jean‐Claude; Bédossa, Marc; Toumoulin, Christine

doi:10.1016/j.irbm.2013.08.004

Cited by 3 publications

(2 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As a foreword, it is important to consider developments in coronary imaging technology, including magnetic resonance angiography (MRA) and rotational X-ray angiography [ 41 , 42 ]. This allows for more accurate coronary imaging, detection and identification of pathologies.…”

Section: Introductionmentioning

confidence: 99%

Critical evaluation of stents in coronary angioplasty: a systematic review

Stevens¹,

Zamani

Osborne³

et al. 2021

BioMed Eng OnLine

View full text Add to dashboard Cite

Background Coronary stents are routinely placed in the treatment and prophylaxis of coronary artery disease (CAD). Current coronary stent designs are prone to developing blockages: in-stent thrombosis (IST) and in-stent re-stenosis (ISR). This is a systematic review of the design of current coronary stent models, their structural properties and their modes of application, with a focus on their associated risks of IST and ISR. The primary aim of this review is to identify the best stent design features for reducing the risk of IST and ISR. To review the three major types of stents used in clinical settings today, determining best and relevant clinical practice by exploring which types and features of offer improved patient outcomes regarding coronary angioplasty. This information can potentially be used to increase the success rate of coronary angioplasty and stent technology in the future taking into account costs and benefits. Methods Scientific databases were searched to find studies concerning stents. After the exclusion criteria were applied, 19 of the 3192 searched literature were included in this review. Studies investigating three major types of stent design were found: bare-metal stents (BMS), drug-eluting stents (DES) and bioresorbable stents (BRS). The number of participants varied between 14 and 1264. On average 77.4% were male, with a mean age of 64 years. Results From the findings of these studies, it is clear that DES are superior in reducing the risk of ISR when compared to BMS. Conflicting results do not clarify whether BRS are superior to DES at reducing IST occurrence, although studies into newer BRS technologies show reducing events of IST to 0, creating a promising future for BRS showing them to be non-inferior. Thinner stents were shown to reduce IST rates, due to better re-endothelialisation. Scaffold material has also been shown to play a role with cobalt alloy stents reducing the risk of IST. This study found that thinner stents that release drugs were better at preventing re-blockages. Some dissolvable stents might be better at stopping blood clots blocking the arteries when compared to metal stents. The method and procedure of implanting the stent during coronary angioplasty influences success rate of these stents, meaning stent design is not the only significant factor to consider. Conclusions Positive developments in coronary angioplasty could be made by designing new stents that encompass all the most desirable properties of existing stent technology. Further work is needed to investigate the benefits of BRS in reducing the risk of IST compared to DES, as well as to investigate the effects of different scaffold materials on IST and ISR outcomes.

show abstract

Section: Introductionmentioning

confidence: 99%

Critical evaluation of stents in coronary angioplasty: a systematic review

Stevens¹,

Zamani

Osborne³

et al. 2021

BioMed Eng OnLine

View full text Add to dashboard Cite

show abstract

“…The hydraulic dilatation of this balloon dilates the narrowed, occluded vessel [3,6,7]. The balloon is monitored in the body using X-ray fluoroscopy [9][10].…”

Section: Introductionmentioning

confidence: 99%

Visibility of Balloon Dilatation Catheters

Pelyhe¹,

Bognár²

2015

Period. Polytech. Mech. Eng.

View full text Add to dashboard Cite

In this study, an easy to use measurement method was developed to quantify the balloon dilatation catheters visibility, thus making them comparable. The visibility of the distal and proximal markers and the balloon (average values of the markers Keywords balloon dilatation catheter, radiodetectability, visibility IntroductionCardiovascular diseases are the number one cause of death worldwide. 41% of death is caused by ischaemic heart disease and 35% by stroke [1]. These emergences are caused by stenosis or occlusion of the vessels in the heart or brain [2]. One of the potential medical devices used for the dilatation of the vascular system is the balloon dilatation catheter [3].The balloon dilatation catheter (so called balloon catheter [4][5]) is an intravascular catheter (single or multilumen tube), on which a balloon is located near the distal end (this end is introduced into the body). The hydraulic dilatation of this balloon dilates the narrowed, occluded vessel [3,6,7]. The balloon is monitored in the body using X-ray fluoroscopy [9-10].The current standard for balloon dilatation catheters (ISO 10555-1:2013, ISO 10555-4:2013) and the guide of the U.S. Food and Drug Administration (FDA) specify that the balloon shall be radio-detectable when it is inserted into the body [3,6,11]. The placement of the balloon to the target place in the patient's vasculature is facilitated with radiopaque material. This radiopaque material is typically a metal marker band. It may be placed on the centre of the balloon (single metal marker) or on the ends of the balloon (double metal marker) [12,13].In the standard for general requirements of the intravascular catheters (ISO 10555-1:2013), Part 4 relates to the balloon dilatation catheters, and requests the test method of visibility according to the standard ASTM F640-12 [3,6,14]. It contains standard test methods for determining radiopacity however; it does not specify the type of the medical devices. The guide of the FDA indicates that the radiopaque markers on the balloon should be investigated [11,14,15], but unified measure method is not recommended in the standards and literature. The manufacturer can measure this visibility by different methods, therefore they are not comparable. The methods of the manufacturer are not available. According to the standard (ASTM F640-12) pixel density or optical density are determined by some method.The measured visibility values are not quantified; instead of terms were used for visibility's characterisation, such as: excellent [16], optimal radiopacity [17], optimal visibility [18], and increased radiopacity [19], extremely visible [20].

show abstract

GAN-based heterogeneous network for ancient mural restoration

Zhao,

Ren,

Sun

et al. 2024

Herit Sci

View full text Add to dashboard Cite

Ancient murals, invaluable cultural artifacts, frequently suffer damage from environmental and human factors, necessitating effective restoration techniques. Traditional methods, which rely on manual skills, are time-consuming and often inconsistent. This study introduces an innovative mural restoration approach using a generative adversarial network (GAN) within a UNet architecture. The generator integrates Transformer and convolutional neural network (CNN) components, effectively capturing and reconstructing complex mural features. This work's novelty lies in integrating the Group-wise Multi-scale Self-Attention (GMSA), an Encoder-Decoder Feature Interaction (EDFI) module, and a Local Feature Enhancement Block (LFEB). These components allow the model to better capture, reconstruct, and enhance mural features, leading to a significant improvement over traditional restoration methods. Tested on a dataset of Tang Dynasty murals, the method demonstrated superior performance in PSNR, SSIM, and LPIPS metrics compared to seven other techniques. Ablation studies confirmed the effectiveness of the heterogeneous network design and the critical contributions of the GMSA, EDFI, and LFEB modules. Practical restoration experiments showed the method's ability to handle various types of mural damage, providing seamless and visually authentic restorations. This novel approach offers a promising solution for the digital preservation and restoration of cultural heritage murals, with potential applications in practical restoration projects.

show abstract

Automatic determination of optimal view for the visualization of coronary lesions by rotational X-ray angiography

Cited by 3 publications

References 11 publications

Critical evaluation of stents in coronary angioplasty: a systematic review

Critical evaluation of stents in coronary angioplasty: a systematic review

Visibility of Balloon Dilatation Catheters

GAN-based heterogeneous network for ancient mural restoration

Contact Info

Product

Resources

About