Analysis of Radiological Features of Lateral Femoral Impaction Fracture / Lateral Femoral Notch Sign

Study Overview
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Brief Summary
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Analysis of Radiological Features of Lateral Femoral Impaction Fracture (LFC-IF) / Lateral Femoral Notch Sign will be performed on MRIs of consecutive patients after anterior cruciate ligament (ACL) injuries and without ACL injuries.

Detailed Description
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Two independent measurers will twicely measure the radiological features of Lateral Femoral Impaction Fracture / Lateral Femoral Notch Sign on MRIs of consecutive patients after anterior cruciate ligament (ACL) injuries and without ACL injuries. In cases without ACL injuries, radiological features of terminal sulcus (TS), a native sulcus located on the lateral femoral condyle, will be measured. Intra- and inter-rater agreements will be calculated. The following radiological features will be assessed/ measured: Presence of LFC-IF/ TS LFC-IF/ TS depth LFC-IF/ TS length Distance from Blumensaat line to the front border of LFC-IF / TS Distance from Blumensaat line to the deepest part of LFC-IF / TS Distance from Blumensaat line to the rear border of LFC-IF / TS

Official Title
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Analysis of Radiological Features of Lateral Femoral Impaction Fracture / Lateral Femoral Notch Sign

Conditions
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Anterior Cruciate Ligament Injuries, Anterior Cruciate Ligament Rupture, Anterior Cruciate Ligament Tear

Intervention / Treatment
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* Diagnostic Test: Measurements on knee MRI performed during routine clinical practice


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Performed knee MRI with or without ACL tear Exclusion Criteria: Osteophytes hindering assessment of LFC-IF/ TS morphology Morphological disturbances hindering assessment of LFC-IF/ TS morphology

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 45 Years

Sexes Eligible for Study
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All

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Patients with ACL tear<br>Patients with ACL tear- MRIs will be assessed | Diagnostic Test: Measurements on knee MRI performed during routine clinical practice<br>* Patients after knee injury are often advised to undergo knee MRI for diagnosis. Measurements on knee MRI performed during routine clinical practice will be made.<br>|
| Patients without ACL tear<br>Patients without ACL tear - MRIs will be assessed | Diagnostic Test: Measurements on knee MRI performed during routine clinical practice<br>* Patients after knee injury are often advised to undergo knee MRI for diagnosis. Measurements on knee MRI performed during routine clinical practice will be made.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Distance from Blumensaat line to the rear border of LFC-IF / TS | Distance from Blumensaat line to the rear border of LFC-IF /TS | At the time of MRI exam | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Distance from Blumensaat line to the deepest part of LFC-IF / TS | Distance from Blumensaat line to the deepest part of LFC-IF / TS | At the time of MRI exam | 
| Distance from Blumensaat line to the front border of LFC-IF / TS | Distance from Blumensaat line to the front border of LFC-IF / TS | At the time of MRI exam | 
| LFC-IF / TS length | LFC-IF / TS length | At the time of MRI exam | 
| LFC-IF / TS depth | LFC-IF / TS depth | At the time of MRI exam | 
| Presence of LFC-IF / TS | Presence of LFC-IF / TS | At the time of MRI exam |