Cardiac Output

Purpose

Calculate cardiac output

Tag(s)

#LV Functional Assessment

Panel

Cardiac 

TOUCH-AI ID

TAI-04180024

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 left ventricular (LV) function is a well-established clinical parameter with fundamental diagnostic, therapeutic, and prognostic implications. Cardiac CT angiography (CCTA) and cardiac magnetic resonance (CMR) allow accurate LV morphological and functional assessment. Automated LV function quantification would prevent detection errors, would save the interpreting physician time by eliminating manual measurements, and would provide structured quantitative data, which could be used in later studies or risk stratification schemes.

Narrative(s)

All patients undergoing CCTA or CMR examinations should have automated quantification of LV function if data are available, which may then be automatically populated into the radiology report or a report supplement.

Workflow Description

The patient receives an ECG-synchronized CCTA of the heart. The algorithm retrieves the imaging data set and may ingest other electronic medical record data such as age, sex, and body surface area (BSA). The algorithm calculates absolute LV end-diastolic volume (EDV), end-systolic volume (ESV), ejection fraction (EF), cardiac output (CO), and myocardial mass. With BSA, the algorithm computes indexed LV EDV, ESV, and myocardial mass. The algorithm returns all measurements. Absolute and indexed EDV, ESV, EF, CO, and myocardial mass may automatically populate the report, possibly within a supplement containing other quantitative data.

Considerations for Dataset Development


Procedures(s): ECG-synchronized cardiac CT

 

View(s): CCTA: Any volumetric imaging dataset

 

Sex at Birth: {Male, Female}

 

Age: [15,90]

 

Body Surface Area: Consider a robust range of BSA

 

Heart Abnormalities: {Congenital heart disease, ventricular septal defects, congenital heart disease repair, mitral valve replacements}

 

Contrast Material: {Contrast-enhanced (CCTA), noncontrast enhanced applications}

Technical Specifications


Inputs

DICOM Study

Procedure

XRAY, Chest

Views

AP, PA/Lat, inclination e.g., upright, semi-upright, supine

Data Type

DICOM

Modality

XRAY

Body Region

Chest

Anatomic Focus

Lung

Pharmaceutical

N/A

Scenario

N/A

 

Primary Outputs

Cardiac Output

RadElement ID

RDE292

Definition

Calculated multiplying LV stroke volume by the heart rate (L/min)

Data Type

Numeric

Value Set

[0,15]

Units

L/min

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.