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Figure 1 | Arthritis Research & Therapy

Figure 1

From: The association between patellar alignment on magnetic resonance imaging and radiographic manifestations of knee osteoarthritis

Figure 1

Diagram of measured patellar alignment indices. (a) In the sagittal plane, PL is the inner patellar length and TL is the patellar tendon length (PLR, the patellar length ratio, was computed as PL/TL). (b-d) In a transverse (axial) plane, SA is the sulcus angle (b) and LPTA is the lateral patellar tilt angle (c); (d) diagram of bisect offset (BO) measurement.

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