Patellar Tendon-Lateral Femoral Condyle Friction Syndrome Detection

Purpose

Identify findings associated with patellar-tendon-lateral femoral condyle friction syndrome

Tag(s)

 

Panel

Musculoskeletal Panel

Define-AI ID

19050021

Originator

Woojin Kim
Lead  Woojin Kim

Panel Chair

Jay Patti

Panel Reviewers

Musculoskeletal Panel

License

Creative Commons 4.0 
Status Public Commenting 
RadElement Set RDES146 
                               

Clinical Implementation


Value Proposition


Patellar tendon-lateral femoral condyle friction syndrome (PT-LFCFS), also known as Hoffa fat pad impingement syndrome is a common cause of anterior knee pain. Related to patellar maltracking, there is impingement of the superolateral aspect of the infrapatellar fat pad (aka Hoffa fat pad) between the patellar tendon and the lateral femoral condyle. This finding can be subtle on MRI and can be missed by the radiologist.

Narrative(s)


A 32-year-old male presents with a history of chronic anterior knee pain. Radiologists can miss subtle cases of PF-LFCFS on MRI (PD-weighted images with fat-saturation/T2-weighted images with fat-saturation/STIR - i.e. fluid-sensitive sequence with fat suppression) and can benefit from an algorithm that can detect and alert the radiologist.

Workflow Description


Images obtained from the MRI are sent to the PACS/viewer and the AI model. The AI model analyzes the images. The model identifies an area of high signal intensity (on PD-WI with FS and T2-WI with FS) in the superolateral aspect of the infrapatellar fat pad. A message is sent to both the PACS/viewer and the reporting solution from the model with this information.


Considerations for Dataset Development



Procedures(s)

{MRI Knee}

View(s)

{Axial, Sagittal}

Sex at Birth

{Male, Female}

Age

[12, 60]

Technical Specifications


Inputs

 

DICOM Study

Procedure

MRI Knee

Views

Axial , Sagittal

Data Type

DICOM

Modality

MRI

Body Region

Lower Extremity

Anatomic Focus

Knee




Primary Outputs


Patellar Tendon-Lateral Femoral Condyle Friction Syndrome Detection

RadElement ID

RDE980

Definition

Patellar tendon-lateral femoral condyle friction syndrome

Data Type

Categorical

Value Set

  • Absent
  • Present
  • Unknown

Units

N/A

Future Development Ideas


For the first version, the detection of abnormal signal intensity of the fat pad can be detected. The AI developers should be aware that this area can have a mass, cystic lesion, and fibrosis as a part of the spectrum of abnormality in this region. Other associated findings like lateral patellar tilt/subluxation and patella alta can be incorporated in the future versions. Of note, a recent surgery can cause abnormality in this region. As a result, future versions of the AI models will need to be able to take this into account.