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The Ottawa knee rules are a set of rules used to help physicians determine whether an x-ray of the knee is needed. [1] They state that an X-ray is required only in patients who have an acute knee injury with one or more of the following: Age 55 years or older; Tenderness at head of fibula; Isolated tenderness of patella
That means the use of the above rules has a false negative result of 1% and a false positive result of 40%. [1] From a medical point of view, the false positive result is less important as if the patient is positive, they should receive an X-ray to assess for a possible fracture, which has a much higher specificity.
A joint space of between 1.5 and 4 mm is regarded as normal. [15] Ankle osteoarthritis. For the ankle, the Kellgren–Lawrence scale, as described for the hip, has been recommended. [16] The distances between the bones in the ankle are normally as follows: [17] Talus - medial malleolus: 1.70 ± 0.13 mm; Talus - tibial plafond: 2.04 ± 0.29 mm
Front page of ACR/NEMA 300, version 1.0, which was released in 1985 DICOM is a standard developed by American College of Radiology (ACR) and National Electrical Manufacturers Association (NEMA). In the beginning of the 1980s, it was very difficult for anyone other than manufacturers of computed tomography or magnetic resonance imaging devices ...
A Settegast is a standard medical x-ray projection that presents a tangential view of the patella. To acquire such an image the patient is placed in a prone position with the knee flexed at least 90 degrees and the field of view centered on the patellofemoral joint space.
A PACS consists of four major components: The imaging modalities such as X-ray plain film (PF), computed tomography (CT) and magnetic resonance imaging (MRI), a secured network for the transmission of patient information, workstations for interpreting and reviewing images, and archives for the storage and retrieval of images and reports.
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The most common knee problems are: soft tissue inflammation, injury, or osteoarthritis. The mechanism of the knee injury can give a clue of the possible structures that can be injured. For example, applying valgus stress on the knee can cause medial collateral ligament rupture, meanwhile a varus force can cause lateral collateral ligament rupture