Flow in the Pulmonary Artery

Purpose

Automate measurement of flow in pulmonary artery

Tag(s)

#Qp:Qs

Panel

 Cardiac

TOUCH-AI ID

 TAI-04180021

Originator

 Benoit Desjardins

Panel Chair

 Carlo De Cecco

Panel Reviewers

 Cardiac Panel

License

 Creative Commons 4.0

Status  Public Commenting
                               

Clinical Implementation


Value Proposition

Measurement of flow in the pulmonary artery is a well-established clinical parameter that has fundamental diagnostic, therapeutic, and prognostic implications. Cardiac Magnetic Resonance (CMR) allow accurate assessment of flow parameters. Automated pulmonary artery flow quantification would save the interpreting physician time via elimination of manual measurements, prevent detection errors, and provide structured quantitative data, which could be used in later studies or risk stratification schemes.

Narrative(s)

All patients undergoing CMR examinations which include flow measurements should have automated quantification of pulmonary artery flow if data are available, which may then be automatically populated into the radiology report or a report supplement.

Workflow Description

Patient receives MRI of the chest/heart. Algorithm retrieves pulmonary artery flow imaging dataset if present and may ingest additional EMR data such as age, sex, and body surface area. Algorithm executes and calculates values of net flow, flow volume, maximum flow velocity and flow gradient in the pulmonary artery. Algorithm also determines if aliasing is present. Algorithm returns all measurements, which could populate the report (possibly within a supplement containing other quantitative data). Algorithm flags abnormal values.

Considerations for Dataset Development


Procedures(s): MRI, Cardiac

View(s): CMR velocity-encoded phase contrast images, pulmonary artery

 

Sex at Birth: {Male, Female}

 

Age (years): [0,90]

 

Intervention:  {Congenital heart disease repair, mitral valve replacements}

 

Comorbidities: {Congenital heart disease, Ventricular septal defects}

 

Body Surface Area (m2): [1,3.5]

 

Body Mass Index (kg/m2): [10,52]

 

Pulmonary artery diameter (mm): [10,50]

Technical Specifications


Inputs

DICOM Study

Procedure

MRI, Cardiac

Views

CMR velocity-encoded phase contrast images, pulmonary artery

Data Type

DICOM

Modality

MR

Body Region

Chest

Anatomic Focus

Heart

 

Primary Outputs

Pulmonary Artery Flow Rate

RadElement ID

RDE298

Definition

Measurement of net flow volume in the pulmonary artery above the aortic valve

Data Type

Numeric

Value Set

 

Units

mL/sec

Secondary Outputs

Maximum Flow Velocity in the Pulmonary Artery

RadElement ID

RDE299 

Definition

Measurement of maximum flow velocity in the pulmonary artery above the aortic valve

Data Type

Numeric

Value Set

 

Units

cm/sec

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.