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Fig. 1 | Arthritis Research & Therapy

Fig. 1

From: Power Doppler ultrasonographic assessment of the joint-draining lymph node complex in rheumatoid arthritis: a prospective, proof-of-concept study on treatment with tumor necrosis factor inhibitors

Fig. 1

B-mode and power Doppler parameters assessed in axillary LNs by ultrasonography. a Representative image of an axillary LN showing the short axis (SA) and long axis (LA) used for volume calculation (see Methods for description of the formula). b Representative images of the same axillary LN showing three independent cortical measurements parallel to LN axes (upper, middle, and lower panels). The major of the cortical measurements (presented in the upper panel) is defined as lymph node cortical width (LNCW). The capsule, the hypoechoic cortical area (cortex), and the hyperechoic medullary region (medulla) of the LN are outlined. c Representative images of the PD grading system. Four different axillary LNs characterized by progressive PD grades with progressive involvement of the cortical region are shown. White arrows indicate the number of PD-positive signals in the cortex. VH vascular hilum (anatomic entry site of blood vessels into the node)

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Arthritis Research & Therapy

ISSN: 1478-6362

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