Aortic Valve Analysis

Purpose

Automate aortic valve measurements

Tag(s)

 

Panel

 Cardiac

TOUCH-AI ID

 TAI-04180019

Originator

Carlo De Cecco

Panel Chair

Carlo De Cecco

Panel Reviewers

Cardiac Panel

License

Creative Commons 4.0

Status Public Commenting

Clinical Implementation


Value Proposition

Measurement of the aortic valve opening area is an important parameter to assess valve stenosis. Cardiac CT angiography (CCTA) allows for accurate aortic valve morphological and functional assessment. Automated aortic valve area measurement would save the interpreting physician time via elimination of manual measurements, would prevent detection errors, and would provide structured quantitative data, which could be used in later studies or risk-stratification schemes.

Narrative(s)

All patients undergoing CCTA with functional data should have automated quantification of the aortic valve opening area if data are available, which may then be automatically populated into the radiology report or a report supplement.

Workflow Description

A patient receives electrocardiogram (ECG)-synchronized CTA of the chest. An algorithm retrieves input for the imaging data set and relevant electronic medical record data, including age, gender, and body surface area (mL/m2). The algorithm then determines the best single diastolic and single systolic phases of CT with the least motion artifact and performs the measurements defined below on systolic phases. Once the maximum aortic valve opening area is measured, all measurements are returned to the radiologist.

Considerations for Dataset Development


Procedures(s): ECG-synchronized cardiac CT

View(s): CCTA: Any volumetric imaging data set

 

Sex at Birth: {Male, Female}

 

Age: [15,90]

 

History: Aortic stenosis

 

CT: Must be gated with multiple diastolic and systolic phases of the cardiac cycle

 

Contrast material: CT w/ IV arterial-phase contrast

 

Position: {Weight bearing, nonweight bearing}

Technical Specifications


Inputs

DICOM Study

Procedure

ECG-synchronized cardiac CT

Views

CCTA: Any volumetric imaging data set

Data Type

DICOM

Modality

CT

Body Region

Chest

Anatomic Focus

Heart

Primary Outputs

Best Systolic Phase

RadElement ID

RDE288 

Definition

Systolic phase

Data Type

Numeric

Value Set

[0,100]

Units

Percentage of cardiac cycle in systole

 

Best Diastolic Phase

RadElement ID

RDE289

Definition

Diastolic phase

Data Type

Numeric

Value Set

[0,100]

Units

Percentage of cardiac cycle in diastole

 

Aortic Valve Opening Area

RadElement ID

RDE290 

Definition

Aortic valve opening area

Data Type

Numeric

Value Set

 

Units

mm2

Public Commenting


Use cases are meant to be a primary vehicle for distributing clinical information to the developer community. They pinpoint precise scenarios within radiology workflows where potential automation could add noticeable value and establish standards for interpreting and passing corresponding common data elements. Implementing effective standards requires the perspective from all stakeholders. So to that end, we encourage your feedback on use cases.

To submit comments, please email DSIUseCases@acr.org with the use case title(s) and relevant comments by January 1, 2019. If more convenient, you may also download this use case and comment directly on the PDF. Just attach the PDF copy on the email.