Left Ventricle Volume

Purpose	Automate standard left ventricle volumetric measurements
Tag(s)	#LV Functional Assessment
Panel	Cardiac
Define-AI ID	18040010
Originator	Carlo De Cecco
Panel Chair	Carlo De Cecco
Panel Reviewers	Cardiac Panel
License	Creative Commons 4.0
Status	Published

Value Proposition

The measurement of left ventricular (LV) function is a well-established clinical parameter that has fundamental diagnostic, therapeutic, and prognostic implications. Cardiac CT angiography (CCTA) and cardiac magnetic resonance (CMR) allow for accurate LV morphological and functional assessment. Automated LV function quantification would save the interpreting physician time by eliminating manual measurements, preventing detection errors, and providing structured quantitative data, which could then 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

A patient receives ECG-synchronized CCTA of the heart. An algorithm retrieves the imaging data set and may ingest other electronic medical records (EMR) data such as age, sex, and body surface area (BSA). The algorithm calculates the 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, LV ESV, and myocardial mass. The algorithm returns all measurements to the radiologist. Absolute and indexed EDV, ESV, EF, CO, and myocardial mass may automatically populate the report, possibly within a supplement containing other quantitative data.

Procedures(s): ECG-synchronized cardiac CT

 

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

 

Sex at Birth: {Male, Female}

 

Age: [15,90]

 

Body Surface Area: varied

 

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

 

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

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

End Diastolic Volume

RadElement ID	RDE218
Definition	Measure LV end-diastolic volume
Data Type	Numeric
Value Set	[0,200]
Units	mL

 

End Systolic Volume

RadElement ID	RDE219
Definition	Measure LV end-systolic volume
Data Type	Numeric
Value Set	[0,200]
Units	mL

 

Ejection Fraction

RadElement ID	RDE220
Definition	LV ejection fraction, calculated dividing stroke volume by the end-diastolic volume (%). The stroke volume is calculated subtracting LV ESV from LV EDV (EDV-ESV)
Data Type	Numeric
Value Set	[0,1]
Units	%

 

Indexed End Diastolic Volume

RadElement ID	RDE221
Definition	LV end-diastolic volume indexed to body surface area (mL/m2)
Data Type	Numeric
Value Set	[0,100]
Units	mL/m2

 

Indexed End Systolic Volume

RadElement ID	RDE222
Definition	LV end-systolic volume indexed to body surface area (mL/m2)
Data Type	Numeric
Value Set	[0,100]
Units	mL/m2

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