Giant cell tumor

  Clinical History: 40 year old man with left knee pain for three months Diagnosis: Giant cell tumor involving the proximal tibia with intratumoral hemorrhage MR Technique: Knee imaging was performed on a 3T MR system (Skyra, Siemens). (A) Axial T1-weighted TSE (TR/TE 700/12ms) images and (B) axial T2-weighted TSE images with Dixon fat suppression […] [...]

Improving MR Joint Diagnostics with T1 Water Contrast Using a RESTORE Pulse

The article discusses technical considerations and various clinical applications of the DESS sequence. 3D DESS techniques have advantages in assessment of pediatric cartilage pathology including higher SNR, increased cartilage-to-fluid contrast and isotropic resolution, which helps to reduce partial volume effects. 3D DESS techniques are also of essential importance in the pediatric population due to the lack of ionizing radiation. [...]

Case Report: Assessment of Renal Allograft Function with DTI and Tractography

The article discusses technical considerations and various clinical applications of the DESS sequence. 3D DESS techniques have advantages in assessment of pediatric cartilage pathology including higher SNR, increased cartilage-to-fluid contrast and isotropic resolution, which helps to reduce partial volume effects. 3D DESS techniques are also of essential importance in the pediatric population due to the lack of ionizing radiation. [...]

3T MR Imaging of the Pediatric Cartilage Using 3D Dual Echo Steady State (DESS)

The article discusses technical considerations and various clinical applications of the DESS sequence. 3D DESS techniques have advantages in assessment of pediatric cartilage pathology including higher SNR, increased cartilage-to-fluid contrast and isotropic resolution, which helps to reduce partial volume effects. 3D DESS techniques are also of essential importance in the pediatric population due to the lack of ionizing radiation. [...]

MRI Assessment of Articular Cartilage Repair

The evolution of sophisticated surgical repair procedures for the treatment of isolated, focal traumatic or degenerative cartialge lesions has created the need for accurate, non-invasive assessment of the repair tissue. MRI depicts well subchondral bone and bone marrow, allowing examination of repair tissue and its interface with parent cartilage and complications of repair surgeries such as graft hypertrophy and delamination. [...]

Jumper’s knee

A 26 year old male with left knee pain. [...]

Tear of the prepatellar quadriceps continuation

A 71 year old male presenting with pain in the right knee. [...]

Radial tear with flipped meniscus

50 year old man with left knee pain which worsens with activity. [...]

Synovial Osteochondromatosis

59 yr old woman with left knee pain. [...]

Cortical desmoid (distal femoral cortical irregularity)

12 year old female ballet dancer with slowly progressive knee pain, aggravated with flexion. [...]

Transient Patellar Dislocation

This is a 13-year-old male who presented for initial evaluation of his left knee, after having a non-contact injury during athletics at school one week prior. He was unsure of the position of his knee at the time of injury. The patient localized the pain to the medial aspect of his knee. He ambulates with difficulty using a single crutch. [...]

Osteochondral defect (unstable)

This is a 14-year-old female with right knee pain for several months. She first started noticing the pain while running track, which she has stopped due to the degree of pain. She obtained radiographs (not shown) which showed an osteochondral defect. An MRI was then obtained to determine stability of the lesion. [...]

Bucket handle tear in the left medial meniscus

58 yr old man with left knee pain. [...]

Articular Cartilage Defect

47 year old man presented with left knee pain and swelling and some loss of range of motion. He has no history of trauma to the left knee or locking of the left knee. [...]

Partial Rupture of the Posterior Cruciate Ligament

This 29-year-old man presented to his physician with pain in his left knee. He could remember a minor knee injury several weeks ago. In his spare time he goes running three times a week. His past medical history showed no relevant disease. [...]

Anterior Cruciate Ligament Disruption

.ima file Zip Download .ima file Zip Download .ima file Zip Download Clinical Topic Orthopedics Subtopic Trauma Examination Region Knee Key Points ACL disruption Bone marrow contusion Image Findings A complete ACL disruption is demonstrated. (ACL = Anterior Cruciate Ligament; figure A) Bone marrow contusion is seen involving the lateral femoral condyle. (figures B and C) Images Sagittal […] [...]

Neurofibroma

This 35-year-old female presented to clinic complaining of pain and swelling posterior to her right knee of approximately 3 months duration. Physical examination confirmed the presence of a soft tissue mass in the patient’s right posterior lower leg. An MRI scan demonstrated a well-defined oval lesion, confirmed to be a neurofibroma by subsequent surgery. [...]

3D High Resolution MRI of the Knee at 3T Using a Moderately T2-weighted 3D-TSE-fs (syngo SPACE) sequence – Useful or Not?

3D High Resolution MRI of the Knee at 3T SPACE is a new approach to MRI of the knee at 3T. It allows high spatial resolution isotropic true 3-dimensional acquisition and subsequent reconstruction. Overall acquisition time is shorter than that of three separate 2-dimensional datasets and SNR for 1 mm reconstructions is similar to conventional 2D-TSE-fs. The identification of anatomical structures is in general equal or superior to conventional scans, with superior discrimination of relevant small ligamentous structures. A simple protocol comprising 1 mm SPACE reconstructions in all three orientations is extremely useful for clinical evaluation. The additional possibility of free 3- dimensional reconstruction depending on the specific clinical need may become useful for diagnosis in difficult cases or with complex anatomy, and in particular for presurgical planning, i.e. for traumatic ligamentous lesions or complex meniscal tears. [...]

Case Report: Fast Joint Imaging at 1.5 Tesla with a Combination of the Quadrature Knee and Body Matrix Coil in Case of Severe Knee Pain of an Obese Patient

Knee MRI is challenging in both obese patients and patients in pain, requiring in some cases special coil setups as imaging is impossible with a conventional closed knee coil. In the presented case, a flexible coil setup is demonstrated in combination with open-bore MR technology. This illustrates the benefit of such setups in the diagnosis of knee pain in obese patients. [...]

Case Report: Knee MR Imaging of Haemarthrosis in a Case of Haemophilia A

Imaging pediatric joints is often still a domain of x-ray and ultrasound. However, the application of MRI is of growing importance, not only because of its excellent soft tissue contrast but also because of its capability to early and precisely detect bone destruction. In this case, Prof. Marc-André Weber (University of Heidelberg, Germany) reports on the imaging findings of a 14-year-old male with known hemophilia A. [...]