Ligamentum Teres Injury

Purpose Ligamentum teres injury detection Tag(s)   Panel Musculoskeletal Panel Define-AI  18050005 Originator Woojin Kim Panel Chair Jay Patti  Panel Reviewers Musculoskeletal Panel License Creative Commons 4.0  Status Public Commenting RadElement Set RDES38

Value Proposition

The ligamentum teres (LT) is an important stabilizer of the hip joint. An LT injury can be easily missed by radiologists despite it being one of the common causes of hip and groin pain, particularly in athletes. Radiologists would benefit from an algorithm that segments the LT and detects its abnormality. An AI algorithm meeting this use case would help to reduce the false negative rate, patient risk, and medical-legal risk for the radiologists.

Narrative(s)

A 25-year-old patient with a sudden twisting injury of the hip presents with severe hip pain. The initial radiographs of the hip were negative. Subsequently, an MRI of the hip was obtained. The AI algorithm evaluates the MR images, identifies the LT, and determines it as normal, abnormal, or indeterminate. The abnormal LT can be further subdivided into tendinopathy, partial tear, and full-thickness tear. The radiologist is informed of these findings at the time of interpretation.

Workflow Description

Images obtained from MRI or MR arthrography are sent to PACS/viewer and the AI model. The images are analyzed by the AI model. The model categorizes the LT as either normal, abnormal, or indeterminate. A message is sent to both the PACS/viewer and the reporting solution from the model with the classification information. If the type of injury (ie, tendinopathy, partial tear, full-thickness tear) is also identified, such information can also be sent to PACS/viewer and the reporting solution to highlight the region the engine identified.

Procedures(s): {MRI of the hip, MR arthrography of the hip, and MRI of the pelvis}

View(s): {MRI/A: coronal, axial, and sagittal}

 

Sex at Birth: {Male, Female}

 

Age (years): [0,90]

 

MRI Technique: MR arthrography will likely have the highest accuracy, followed by MRI of the hip, then MRI of the pelvis

 

Planes of Imaging: All three planes should be evaluated, though LT injuries are most often seen on coronal and axial images

Inputs

DICOM Study

Procedure	MRI/A, Hip; MRI, Pelvis
Views	Coronal, axial, sagittal
Data Type	DICOM
Modality	MRI/A
Body Region	Pelvis
Anatomic Focus	Hip

 

Primary Outputs

Ligamentum Teres Status

RadElement ID	RDE235
Definition	Status of the LT
Data Type	Categorical
Value Set	0–Unknown 1–Normal 2–Abnormal
Units	N/A

Secondary Outputs

Ligamentum Teres Abnormality Classification

RadElement ID	RDE236
Definition	If LT is abnormal, classify the injury
Data Type	Categorical
Value Set	0–Unknown 1–Tendinopathy 2–Partial tear 3–Full-thickness tear
Units	N/A

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