Aortic Diameter Measurements


Purpose

Measurements relating to the aorta on 3D CT reconstruction

Tag(s)


Panel

Cardiac

Define-AI ID

19040040

Originator

David Pennes, MD

Panel Chair

Carlo De Cecco, MD

Panel Reviewers

Cardiac Panel

License

Creative Commons 4.0

Status

Public Comment

RadElement Set

RDES147

Clinical Implementation


Value Proposition

An algorithm that could quickly pull standard measurements around the aorta would greatly improve radiology practices, especially those that see a lot of patients for aorta aneurysms. These measurements include aortic root, sinotubular junction, mid-ascending, distal ascending, mid-arch, prox. descending, mid descending, diaphragm and celiac origin.
This algorithm would also add value to health care in decreasing variance of these measurements and allowing clinicians to more effectively track changes in these structures over time. Standards on the locales of the aorta and obliquity for a true perpendicular measurement would improve the way radiologists read and report this information.

Narrative(s)

Patient has a chest radiograph or a chest CT scan done for other reasons, demonstrating a thoracic aortic aneurysm. Algorithm is triggered and returns measurements on  the aortic root, sinotubular junction, mid-ascending, distal ascending, mid-arch, prox. descending, mid descending, diaphragm and celiac origin. The measurements are done perpendicular to the aorta at each location taking into account the tortuosity. Radiologist verifies the values and submits the report which impact treatment. These metrics are then compared later in time on followup examinations to monitor the aneurysm dimensional stability. The goal is to assure that followup examinations are handled in an identical manner, measuring diameters at the same locales and with the same perpendicular orientation to the long axis of the aorta to facilitate accurate comparison.

Workflow Description

Patient receives CT examination. The image is obtained from modality and sent to PACS and the AI engine.  The image is analyzed by the engine. The system then measures the aortic root, sinotubular junction , mid-ascending, distal ascending, mid-arch, prox. descending, mid descending, diaphragm and celiac origin. An alert message is sent to PACS from the engine with the information. 

Considerations for Dataset Development



Procedures(s)

CT

View(s)

Axial, Sagittal, Coronal

Sex at Birth

Male, Female

Age

[0,90]

Size of aneurysm

Varied

Pain

Present, absent

Leak/rupture

Present, absent

Shape

saccular, fusiform, eccentric



Technical Specifications


Inputs

DICOM Study

Procedure

CT

Views

Coronal, sagittal, axial

Data Type

DICOM

Modality

CT

Body Region

Chest

Anatomic Focus

Heart

Pharmaceutical


Scenario




Primary Outputs

aortic root

RadElement ID

RDE984

Definition

diameter of the aortic root

Data Type

Numeric

Value Set


Units

mm


sinotubular junction

RadElement ID

RDE985

Definition

sinotubular junction size

Data Type

Numeric

Value Set


Units

mm



mid-ascending aorta diameter

RadElement ID

RDE986

Definition

diameter of the mid-ascending aorta

Data Type

Numeric

Value Set


Units

mm



mid-arch

RadElement ID

RDE987

Definition

diameter of the aortic arch at mid-point

Data Type

Numeric

Value Set


Units

mm


prox. descending

RadElement ID

RDE988

Definition

diameter of the descending aorta

Data Type

Numeric

Value Set


Units

mm


diaphragm and celiac origin

RadElement ID

RDE995

Definition

Diameter of the aorta at the level of the diaphragm and at the celiac artery origin

Data Type

Numeric

Value Set


Units

mm