Volumetric Quantification of Pericardial Effusion on CCTA

Purpose	Pericardial effusion is difficult to assess and may show inter-observer variability, depending on what location the effusion is measured.
Tag(s)
Panel	Cardiac
Define-AI ID	19040033
Originator	Moritz H. Albrecht
Lead	Moritz H. Albrecht
Panel Chair	Carlo De Cecco
Panel Reviewers	Cardiac Panel
License	Creative Commons 4.0
Status	Public Comment
RadElement Set	RDES131

Clinical Implementation

Value Proposition

Added value for patients with pericardial effusion, in particular, patients with inflammatory heart disease. Follow-up evaluation of effusion and greater accuracy compared to mere diameter measurements. Furthermore, it is yet not possible in clinical routine to provide the absolute volume of effusion.

Narrative(s)

First patient shows pericardial effusion, however, it is located more adjacent to the RV and not circumferential. The reader is uncertain on how the effusion should be quantified.
Second patient with previous pericarditis and coronary artery disease is scanned sequentially for follow-up. Diameter measurements are not sufficiently accurate to detect dynamics in volume, however, volumetric assessment reveals significant changes.

Workflow Description

The reader detects pericardial effusion, though the effusions seems to have a similar density to water, complicating the quantification. An algorithm is triggered, which analyzes the image and returns the volume of effusion. Algorithm also segments areas of the image consistent with effusion to determine the homogeneity of the effusion and provide some interpretability for the output.

Considerations for Dataset Development

Age	Varied
Sex at Birth	male, female
pericardium thickness	varied
Spread	global effusion, locaulated effusions
Cardiothoracic ratio	varied
pulmonary edema	absent, present
pericardial lesions	absent, present
constrictive pericarditis	absent, present

Technical Specifications

Inputs

 

DICOM Study

Procedure	ECG triggered contrast-enhanced CCTA datasets
Views	N/A
Data Type	DICOM
Modality	CCTA
Body Region	Chest
Anatomic Focus	Heart

Primary Outputs

Pericardial effusion volume

RadElement ID	RDE867
Definition	pericardial effusion volume
Data Type	Numeric
Value Set	N/A
Units	ml

Average Density of the Effusion

RadElement ID	RDE868
Definition	average density of the effusion
Data Type	Numeric
Value Set	N/A
Units	HU