Automatic Segmentation and Measurement on Knee Computerized Tomography Images for Patellar Dislocation Diagnosis

Table 4

Geometric measurement results on four patients’ left or right legs at four time instances (, , , and ).

Patient number	Type	Method
	Angle	Automatic	2.1	4.4	1.6	2.0
		Manual	2.0	4.5	1.5	2.0
	Distance	Automatic	0.6	0.7	0.7	0.3
		Manual	0.5	0.7	0.6	0.3
	Angle	Automatic	6.9	4.5	8.1	8.8
		Manual	6.5	4.3	7.8	8.9
	Distance	Automatic	2.3	2.4	3.3	3.7
		Manual	2.4	2.2	3.2	3.5
	Angle	Automatic	18.2	17.3	19.5	18.2
		Manual	18.4	17.5	19.2	18.2
	Distance	Automatic	7.9	8.3	7.5	8.0
		Manual	7.7	8.0	7.7	8.1
	Angle	Automatic	38.0	39.8	39.4	38.5
		Manual	38.5	40.3	39.2	38.9
	Distance	Automatic	—	—	—	—
		Manual	—	—	—	—

The units of degree and millimeter are used for angle and distance, respectively.