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Updated: Jun 5, 2026

Identifying Coronary Artery Calcification on Non-gated Computed Tomography Scans
Published on: August 28, 2018
A Novel Descriptive, Intelligible and Ordered (DINO) classification of coronary bifurcation lesions. Review of
Shams Y-Hassan1, Magnus C Lindroos, Christer Sylvén
1Department of Cardiology, Karolinska Institute, Karolinska University Hospital, Huddinge, S-141 86 Stockholm. shams.younis-hassan@karolinska.se
Insights
A new classification system for coronary artery bifurcation lesions (CABL), called DINO, offers a more detailed and clinically relevant approach. This system aims to improve multicenter studies and meta-analyses by providing standardized terminology for CABLs.
Area of Science:
- Interventional Cardiology
- Cardiovascular Research
Background:
- Existing coronary artery bifurcation lesion (CABL) classification systems have limitations.
- A need exists for a more comprehensive and clinically applicable CABL classification.
Purpose of the Study:
- To introduce the Descriptive, INtelligible and Ordered (DINO) classification system for CABLs.
- To provide a clinically oriented and detailed system for CABL assessment.
Main Methods:
- Development of the DINO classification system for CABLs.
- Incorporation of side branch angulation details relative to the main branch.
- Utilizing self-explanatory terms and mnemonic characters for classification.
Main Results:
- The DINO system offers a descriptive and clinically oriented approach to CABL classification.
- It considers detailed side branch angulation and lesion localization.
- The system uses self-explanatory terms and mnemonic acronyms.
Conclusions:
- The DINO system is the first verbally anchored, all-inclusive CABL classification.
- It precisely describes side branch angulation, lesion distribution, and localization.
- DINO provides a basis for standardized multicenter investigations and meta-analyses.
Background:
Several classification systems for coronary artery bifurcation lesions (CABL) have been described in the literature, but despite the commendable effort to simplify a difficult subject in interventional cardiology, all of them have certain limitations and shortcomings.
Methods And Results:
The proposed Descriptive, INtelligible and Ordered (DINO) is a new descriptive and clinically oriented system of classifying CABLs. This classification system takes into consideration more details of the side branch angulation relative to the main branch. It uses self-explanatory terms and mnemonic characters (acronyms related to the branches of the bifurcation and the shape of side branch angulation). The DINO classification describes the extent of CABL distribution and designates its localization at the bifurcation region. Moreover, systematized simple and easy to remember terms may form a relevant classification basis for multicenter and meta-analysis investigations.
Conclusions:
The DINO is the first verbally anchored, all-inclusive classification system of CABLs. It describes precisely side branch angulation, using self-explanatory and instructive terms that describe both the extent of the lesion's distribution and its localization. The current coronary bifurcation lesion classifications are reviewed.
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