The “gap” sign refers to the presence of high signal on IW FS or PD FS images between the medial aspect of the lateral femoral condyle and the lateral aspect of the mid-ACL. This may be visible in either the coronal ( Figure 2, A and B ) or axial ( Figure 3A ) planes.

Nov 16, 2024 · gap sign: fluid signal and/or a gap between the medial aspect of the lateral femoral condyle and the lateral aspect of the mid-ACL, can be seen on either axial or coronal MRI images. footprint sign: incomplete coverage of the lateral aspect of the tibial spine of the tibia by the distal ACL attachment, seen only on coronal MRI images 8

ACL tears are common athletic injuries leading to anterior and lateral rotatory instability of the knee. Diagnosis can be suspected clinically with presence of a traumatic knee effusion with increased laxity on Lachman's test but requires MRI studies to confirm diagnosis.

The primary sign of ACL tear is fibre discontinuity (Figure 5A). The oblique sagittal plane is the most helpful in diagnosis supported by coronal and axial imaging. The empty notch sign on coronal imaging is a frequent finding in complete ACL tear.

Jun 30, 2016 · The ACL is an intercondylar ligament that attaches proximally at the medial posterior aspect of the lateral femoral condyle and distally at the medial aspect of the intercondylar eminence of the anterior tibia; its function is to prevent anterior translation of the tibia as well as to prevent hyperextension of the knee.

Aug 3, 2015 · Purpose: To describe 2 MRI signs of partial ACL tear involving the posterolateral bundle on conventional knee MRI sequences, specifically, the "gap" and "footprint" signs. Study design:...

Gap and footprint signs are suggestive of posterolateral bundle tear of the ACL, and the presence of 1 or both imaging findings should alert the radiologist to the possibility of a...

The primary signs of ACL tear (ie, abnormal ACL morphologic features or signal intensity) had respective sensitivity and specificity values of 96% (48 of 50 examinations) and 94% (50 of 53) on sagittal images and 92% (46 of 50) and 83% (43 of 52) on coronal images.

Dec 1, 1994 · PURPOSE: To establish the sensitivity and specificity of indirect signs at magnetic resonance (MR) imaging of anterior cruciate ligament (ACL) tear. MATERIALS AND METHODS: MR images of the knees of 89 consecutive patients …

The ‘‘gap’’ sign refers to the presence of high signal on IW FS or PD FS images between the medial aspect of the lateral femoral condyle and the lateral aspect of the mid-ACL. This may be visible in either the coronal (Figure 2, A and B) or axial (Figure 3A) planes. In patients with an intact ACL, the ACL hugs the lateral wall of the