About diagnostic imaging of postoperative complication of anterior cruciate ligament (ACL) reconstruction.
This is the case of a patient the came to my observation for a palpable mass into the anterior-medial pretibial region, two years after ACL reconstruction.
Tunnel cyst formation is a rare complication after ACL reconstruction, usually occurring 1-5 years post-operatively, which may occasionally be symptomatic. The ultrasound exam in this case is not enough. The study is completed with MRI and Cone-Beam CT examination.
Why Cone-Beam CT? Same diagnostic capability of total-body CT but low radiation dose!
The computed tomography dose index (CTDI) is a commonly used radiation exposure index in X-ray computed tomography (CT); in this case 4,74 mGy was the value detected. 16.98 mGy is the estimated absorbed dose by using a total-body CT scan for the same examination.
about ultrasound and mri findings of vastus lateralis injury
This is the case of a young rugby player presenting an high degree strain of the vastus lateralis muscle at its proximal insertion, togheter with an aponeurotic fascial injury on the subcutaneous lateral side.
I always suggest to perform both the Mri and ultrasound investigations; with the Mri exam it is evident the bone marrow edema, due to the avulsion injury at the intertrochanteric line, suspected during the clinical evaluation but impossible to see on ultrasound exam.
Coronal (left) and Sagittal (right) PD-Fs Mri scans (1.5 Tesla).
Axial PD-Fs Mri scan (1.5 Tesla). The bone marrow edema and the avulsion injury are evident.
about ultrasound findings of complete detachment of medial gastrocnemius
In case of major traumas in the calf region, a reminder of its intrinsic anatomy is necessary; I suggest you to read an interesting paper in which all of the tirceps surae anatomical structures are perfectly depicted. https://www.ncbi.nlm.nih.gov/pubmed/25456712
Today I show you the case of a complete detachment of the medial gastrocnemius, togheter with the total rupture of the the so-called intramuscular aponeurosis of the soleus.
Axial T2w (left) and Stir (right) Mri scans (0.3 Tesla)
The Mri images show a gross fluid collection in the aponeurotic space between medial gastrocnemius and soleus muscle; I always perform the ultrasound dynamic examination, both in the acute phase and especially during resting period. The elastosonography study is also useful in the monitoring of the fluid collection evolution.
The elastosonography study is also useful in the monitoring of the fluid collection evolution.
about dynamic ultrasound and mri evaluation of partial patellar tendon tear
Today I show you the case of a partial tear at proximal insertion of the patellar tendon in a professional football player. The patient refears pain during flexion-extension at inferior patellar pole; hystory of repetitive trauma as usual in football players.
about dynamic mri and ultrasound examination of carpal instability
In my previous post Dynamic Evaluation of Dorsal Scapholunate Ligament I showed the usefulness of both ultrasound and Mri dynamic evaluation in the study of this important ligament structure. Today I want to show you the dorsal scapholunate ligament (SL) tear in a patient that came to my observation after a regular healing of post-traumatic scaphoid fracture.
Coronal Stir (left) and T1w (right) Mri scans (0.3 Tesla): correct visualization with no artifacts of post-surgical treatment with scaphoid screw. Tear of the dorsal scapholunate ligament is evident (red arrow).
For the appropriate treatment is crucial to see also the dynamic behaviour of this kind of injuries. I always perform both ultrasound and Mri dynamic evaluation in these cases.
The dynamic ultrasound exam shows the post-traumatic carpal instability; dorsal SL tear is evident, togheter with the scapholunate dissociation and DISI picture.
The Dynamic Mri evaluation (0.3 Tesla) during flexion-extension and ulnar-radial deviation confirms the clinical picture, better defining all the pathologic findings. The radiology technician plays a crucial role for this kind of examination, explaining to the patient the correct wrist movement during the Mri acquisitions.
Today a show you the case of a young football player that came to my observation for a persistent pain on his postero-medial compartment of the leg; as you can see from the dynamic ultrasound examination, a gross irregularity of the cortical tibial surface was evident with intense periostal hypervascularity.
The tibia is the most common site of a stress fracture in the lower body, especially in young athletes. Don’t forget that sensibility of the ultrasound scan with bone-like structures is 100% but 0% specificity. The integration with other imaging modalities is always needed; Mri exam is essential.
Sagittal Stir-3D Shark-T1w Mri scans 0.3 Tesla (from left to right)
Axial Stir (left) and T2w (right) Mri scans (0.3 Tesla); intense periostal reaction is evident.
With plain radiograph positive findings may take months to appear; don’t be surprised if during the first few weeks after the onset of symptoms, x-rays of the damaged area may look normal; not in this case….
Plain radiographs of the same patient: acute phase (left) and two months after (right).