|
Purpose |
Automated detection of cerebral aneurysms on contrast enhanced CT angiography or on non-contrast MR angiography |
|
Tag(s) |
Neurovascular disorders, cerebral aneurysm |
|
Panel |
Neuroradiology |
|
Define-AI ID |
22030023 |
|
Originator |
Houman Sotoudeh, Abhi Jain |
| Lead | Abhi Jain, Ryan Lee |
|
Panel Chair |
Alexander Norbash |
|
Panel Reviewers |
Adam Flanders, Alexander Norbash, John Tsiouris |
|
License |
Creative Commons 4.0 |
| Status | Public Comment |
| RadElement Set | RDES211 |
CT angiograms of the brain are commonly performed for assessment of the intracranial arteries. Accurately identifying intracranial saccular cerebral aneurysms can be challenging, especially in practices with high volumes and with non-specialized interpreting radiologists. An AI algorithm may assist with increasing the accuracy of diagnosis. Prior iterations of conventional CAD models to detect cerebral aneurysms have been limited by high false positive results. Currently published deep learning methods have also shown that aneurysm detection algorithms currently have poor specificity.
A 60-year-old female presents to the emergency department with a severe headache. A non-contrast head CT demonstrates acute subarachnoid hemorrhage (SAH) within the basilar cisterns and scattered along the cerebral convexities. A contrast enhanced CT angiogram or a non-contrast MR angiogram is urgently performed to determine the underlying etiology of the SAH.
The axial source CTA (0.5 to 1 mm slice thickness), 3 plane maximum intensity projections, and 3D volume rendered reconstructions of the circle of Willis (if available) are exported in DICOM format to the AI server/algorithm and assessed. Any blind ending vascular protrusion projecting from the intracranial vasculature or focal dilatation of an intracranial artery is detected, annotated, and displayed for review by the interpreting radiologist.
|
Procedures |
CTA (contrast enhanced) |
|
Sex |
M,F |
|
Age |
[0,100] |
DICOM Study
|
Procedure |
CTA |
|
Views |
Axial source data at 0.5 to 1.0 mm, maximum intensity projections (MIPs), 3D volume rendered reconstructions (3D VR) |
|
Data Type |
DICOM |
|
Modality |
CT, MRI |
|
Body Region |
head |
|
Anatomic Focus |
brain |
Location of Aneurysm
|
RadElement ID |
RDE1381 |
|
Definition |
Location |
|
Data Type |
Categorical |
|
Laterality |
Left, Right |
|
Value Set |
None, anterior communicating artery (ACoA), internal carotid artery-posterior communicating (ICA-PCoA), internal carotid artery-anterior choroidal (ICA-ACh), internal carotid artery/ophthalmic (ICA-Ophth), internal carotid artery terminus (ICA-T), middle cerebral artery bi/trifurcation (MCA), middle cerebral artery-M2 branch (MCA-M2), middle cerebral artery-M3 branch (MCA-M3), middle cerebral artery-M4 branch (MCA-M4), anterior cerebral artery-A2 branch (ACA-A2), anterior cerebral artery-A3 branch (ACA-A3), anterior cerebral artery-A4 branch (ACA-A4), vertebral artery-posterior inferior cerebellar artery (V-PICA), basilar artery-anterior inferior cerebellar artery (B-AICA), basilar artery-superior cerebellar artery (B-SCA), basilar terminus (B-T), posterior cerebral artery-P2 branch (PCA-P2), posterior cerebral artery-P3 branch (PCA-P3), posterior cerebral artery-P4 branch (PCA-P4) |
|
Units |
NA |
Diameter of Aneurysm
|
RadElement ID |
RDE1382 |
|
Definition |
Diameter of the aneurysm dome |
|
Data Type |
Numeric |
|
Value Set |
Diameter |
|
Units |
mm |
Diameter of Aneurysm Neck
|
RadElement ID |
RDE1383 |
|
Definition |
Diameter of the aneurysm neck |
|
Data Type |
Numeric |
|
Value Set |
Diameter |
|
Units |
mm |
Aspect Ratio (Dome:Neck) of Aneurysm
|
RadElement ID |
RDE1384 |
|
Definition |
Ratio of dome diameter to neck diameter |
|
Data Type |
Numeric |
|
Value Set |
0-10 |
|
Units |
Ratio |
Width of Aneurysm
|
RadElement ID |
RDE1385 |
|
Definition |
Width of the aneurysm dome |
|
Data Type |
Numeric |
|
Value Set |
Width of dome |
|
Units |
mm |
Length of Aneurysm
|
RadElement ID |
RDE1386 |
|
Definition |
Length of the aneurysm dome |
|
Data Type |
Numeric |
|
Value Set |
Length of dome |
|
Units |
mm |
Shape of Aneurysm
|
RadElement ID |
RDE1387 |
|
Definition |
Shape of the aneurysm |
|
Data Type |
Categorical |
|
Value Set |
Fusiform, saccular, lobulated, bilobular |
|
Units |
NA |
Orientation of Aneurysm Dome
|
RadElement ID |
RDE1388 |
|
Definition |
Orientation of the aneurysm dome |
|
Data Type |
Categorical |
|
Value Set |
Anterior, posterior, medial, lateral, cranial, caudal |
|
Units |
NA |