Objective
To know the clinically meaningful findings of ultrasonography in plantar fasciitis.

Method
Thirty one feet of 24 patients who had clinical diagnosis of plantar fasciitis and 70 feet of 35 healthy volunteers were evaluated with ultrasound. Sagittal sonograms were obtained in the prone position, and the plantar fascia thickness (PFT) was measured at proximal end near its insertion into the calcaneus. Hypoechogenecity, perifascial fluid collection, tendon rupture, calcaneal spur and calcification were also evaluated.

Results
The plantar fascia thickness (PFT) of the symptomatic heels (SH) of patients group (4.83⁑0.86 mm) was significantly greater than that of their asymtomatic heels (ASH) (2.95⁑0.57

mm)(p＜0.05) and it was also greater than that of control group (2.63⁑0.41 mm)(p＜0.05). The range of difference of both PFT was 0.7∼3.2 mm in patients group and 0∼0.8 mm in control group. Hypoechogenecity was found in 22 SH (71%), perifascial fluid collection in 5 SH (16%) and calcification in 2 SH (6%). Calcaneal bony spur was identified in 7 SH (26%) on simple radiography.

Conclusion
Increased thickness (＞3.8 mm), difference of thickness between SH and ASH (＞1.0 mm) and hypoechogenecity of plantar fascia were clinically meaningful ultrasonographic findings of plantar fasciitis, and ultrasonogrphy can be used as the inital imaging modality for the diagnosis. (J Korean Acad Rehab Med 2002; 26: 182-186)