scholarly journals Free Medial Meniscal Fragment Which Mimics the Dislocated Bucket-Handle Tear on MRI

2014 ◽  
Vol 2014 ◽  
pp. 1-3 ◽  
Author(s):  
Faik Türkmen ◽  
İsmail Hakkı Korucu ◽  
Cem Sever ◽  
Mehmet Demirayak ◽  
Gani Goncü ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Diagnostic Tool ◽  
Meniscal Tear ◽  
Intercondylar Notch ◽  
Resonance Imaging ◽  
Magnetic Resonance Imaging Mri ◽  
Bucket Handle Tear ◽  
Bucket Handle ◽  
Bow Tie

The bucket-handle meniscal tear is a specific type of meniscal injuries which has specific signs on MRI. An attached fragment displaced away from the meniscus with any type of tear causes bucket-handle tear of the meniscus. Magnetic resonance imaging (MRI) is the most commonly used diagnostic tool for meniscal injuries. We present a case of free medial meniscal fragment which mimics the dislocated bucket-handle tear on MRI. The presence of “fragment within the intercondylar notch sign” and “the absence of the bow tie sign” may be an indication of a free meniscal fragment. This should be considered during diagnosis.

MRI set-up and safety

2018 ◽  
pp. 55-62
Author(s):  
Roger Luechinger ◽  
Torsten Sommer
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Electromagnetic Fields ◽  
Diagnostic Tool ◽  
Insulin Pump ◽  
Resonance Imaging ◽  
Aneurysm Clip ◽  
Severe Burns ◽  
Magnetic Resonance Imaging Mri ◽  
Set Up

Magnetic resonance imaging (MRI) is a safe diagnostic tool, with several hundred millions of safe diagnostic studies performed to date. However, there have been at least 15 published cases of patient deaths associated with MRI scanning: ten patients with implanted pacemakers, two patients with an insulin pump, one patient with a neurostimulator, one patient with an aneurysm clip, and one child killed by an oxygen tank. Additionally, hundreds of cases of severe burns or injuries due to ferromagnetic projectiles have also been reported. The main sources of all these risks are the electromagnetic fields of the MRI scanner used to create the images.

2020 MR Safety for Cardiac Devices: An Update for Radiologists

2020 ◽  
pp. 084653712096770
Author(s):  
Kiana Lebel ◽  
Blandine Mondesert ◽  
Julie Robillard ◽  
Magali Pham ◽  
Donato Terrone ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Diagnostic Tool ◽  
Implantable Cardioverter Defibrillators ◽  
Resonance Imaging ◽  
Mr Safety ◽  
Cardiac Devices ◽  
Magnetic Resonance Imaging Mri ◽  
Cardioverter Defibrillators ◽  
Powerful Diagnostic Tool

Magnetic resonance imaging (MRI) is a unique and powerful diagnostic tool that provides images without ionizing radiation and, at times, can be the only modality to properly assess and diagnose some pathologies. Although many patients will need an MRI in their lifetime, many of them are still being unjustly denied access to it due to what were once considered absolute contraindications, including MR nonconditional pacemakers and implantable cardioverter-defibrillators. However, there are a number of large studies that have recently demonstrated that MRI can safely be performed in these patients under certain conditions. In addition, there are an increasing number of novel cardiac devices implanted in patients who may require an MRI. Radiologists need to familiarize themselves with these devices, identify which patients with these devices can safely undergo MRI, and under which conditions. In this article, we will review the current literature on MR safety and cardiac devices, elaborate on how to safely image patients with cardiac devices, and share the expertise of our tertiary cardiac institute.

scholarly journals Anatomy, magnetic resonance and arthroscopy of the popliteal hiatus of the knee: normal aspect and pathological conditions

2021 ◽  
Vol 6 (1) ◽  
pp. 941-954
Author(s):  
Alberto Grassi ◽  
Nicola Pizza ◽  
Gian Andrea Lucidi ◽  
Luca Macchiarola ◽  
Massimiliano Mosca ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Meniscal Tear ◽  
Resonance Imaging ◽  
Discoid Meniscus ◽  
Popliteofibular Ligament ◽  
Complex Region ◽  
Pathological Conditions ◽  
Static Assessment ◽  
Bucket Handle

The popliteal hiatus is a complex region, formed by the confluence of various structures connecting the meniscus, popliteal tendon, tibia and fibula. The main structures that can be found are the three popliteomeniscal fascicles (anterior, postero-inferior and postero-superior), the lateral and posterior meniscotibial ligaments, the popliteofibular ligament and the meniscofibular fascicle. These structures can be identified in most cases using magnetic resonance imaging, and their ‘static’ assessment can be performed. Arthroscopic assessment is useful in identifying and testing ‘dynamically’ the integrity of the structures around the popliteal hiatus. Injuries or abnormalities of the popliteal hiatus and its structures could result in meniscal hypermobility and subluxation; however, these injuries are often unrecognized. Possible abnormalities in this region, apart from the well-known bucket-handle meniscal tear, are the Wrisberg Type III discoid meniscus, and meniscal fascicles tears. Cite this article: EFORT Open Rev 2021;6:941-954. DOI: 10.1302/2058-5241.6.200089

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