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Table 1: The patient and volunteer characteristics and MR imaging findings
Volunteers Patients
Cases 17 144
    Male 12 34
    Female 5 110
Age (yr) 
    Range 23–32 11–80
    Median 26 36
Articular disk position and function (joints) 
    Normal superior 34 113
    PADDWR 0 18
    PADDWOR 0 2
    ADDWR 0 48
    ADDWOR 0 107
Articular disk configuration (joints) 
    Biconcave 32 143
    Biplanar 2 20
    Hemiconvex 0 37
    Thickening of the posterior band 0 36
    Biconvex 0 7
    Folded 0 45
Joint effusion (joints) 
    None or minimal fluid 34 169
    Moderate fluid 0 80
    Marked fluid 0 24
    Extensive fluid 0 15
Osteoarthritis (joints) 
    Negative 34 237
    Positive 0 51
Bone marrow abnormality (joints) 
    Negative 34 260
    Positive 0 28

	Volunteers	Patients
Cases	17	144
Male	12	34
Female	5	110
Age (yr)
Range	23–32	11–80
Median	26	36
Articular disk position and function (joints)
Normal superior	34	113
PADDWR	0	18
PADDWOR	0	2
ADDWR	0	48
ADDWOR	0	107
Articular disk configuration (joints)
Biconcave	32	143
Biplanar	2	20
Hemiconvex	0	37
Thickening of the posterior band	0	36
Biconvex	0	7
Folded	0	45
Joint effusion (joints)
None or minimal fluid	34	169
Moderate fluid	0	80
Marked fluid	0	24
Extensive fluid	0	15
Osteoarthritis (joints)
Negative	34	237
Positive	0	51
Bone marrow abnormality (joints)
Negative	34	260
Positive	0	28