I-A-1) Non-specific thickening of synovial membrane

I-A-1) Non-specific thickening of synovial membrane Grayscale Metatarsal Power Doppler Dorsal aspect of metatarsophalangeal joint in right 1 st toe, longitudinal view Asterisks indicate non-specific thickening of synovial membrane

I-A-1) Non-specific thickening of synovial membrane Grayscale Metatarsal Power Doppler Dorsal aspect of metatarsophalangeal joint in right 1 st toe, transverse view Asterisks indicate non-specific thickening of synovial membrane

Dorsal aspect of metatarsophalangeal joint in right 1 st toe, longitudinal view, with and without compression by transducer Asterisks indicate non-specific thickening of synovial membrane (see also Video 1) I-A-1) Non-specific thickening of synovial membrane Not compressed Metatarsal Compressed

Dorsal aspect of metatarsophalangeal joint in right 1 st toe, transverse view, with and without compression by transducer Asterisks indicate non-specific thickening of synovial membrane (see also Video 2) I-A-1) Non-specific thickening of synovial membrane Not compressed Metatarsal ompressed Metatarsal

I-A-2) Non-specific accumulation of synovial fluid Longitudinal Transverse Patella Femur Femur Suprapatellar recess of right knee An asterisk indicates non-specific accumulation of synovial fluid

Medial aspect of right knee, longitudinal view, with and without compression by transducer An asterisk indicates non-specific accumulation of synovial fluid (see also Video 3) I-A-2) Non-specific accumulation of synovial fluid Not compressed Femur Tibia ompressed Femur Tibia

I-B-1) Intra-capsular connective tissues Orthogonal to bone surface Metacarpal Angled Metacarpal Dorsal aspect of left 2 nd metacarpophalangeal joint, longitudinal view, with 2 imaging planes with different angles An asterisk indicates anisotropy of connective tissue (see also Video 4)

I-B-2) Fibrocartilage Orthogonal to bone surface Metacarpal Angled Palmer aspect of left 3 rd metacarpophalangeal joint, longitudinal view, with 2 imaging planes with different angles An asterisk indicates anisotropy of volar plate (see also Video 5) Metacarpal

Medial aspect of right knee, longitudinal view, with 2 imaging planes with different angles An asterisk indicates anisotropy of meniscus (see also Video 6) I-B-2) Fibrocartilage Orthogonal to bone surface Femur Tibia Angled Femur Tibia

I-B-3) Ligament Orthogonal to skin surface Middle Angled Radial aspect of left 2 nd proximal interphalangeal joint, longitudinal view, with 2 different angles of insonation An asterisk indicates anisotropy of ligament (see also Video 7) Middle

Radial aspect of left 2 nd proximal interphalangeal joint, longitudinal view, with 2 imaging planes with different angles An asterisk indicates anisotropy of ligament (see also Video 8) I-B-3) Ligament Orthogonal to bone surface Middle Angled Middle

I-B-4) Pulley Longitudinal Metacarpal Transverse Metacarpal Palmer aspect of left 3 rd metacarpophalangeal joint An arrowhead indicates A1 pulley (see also Video 9)

I-B-5) Retinaculum Orthogonal to tendon surface Vein Radius Lunate Capitate Angled Vein Radius Lunate Capitate Compartment IV of extensor tendons in left wrist, longitudinal view, with 2 imaging planes with different angles An asterisk indicates anisotropy of retinaculum (see also Video 10, 11)

Compartment IV of extensor tendons in left wrist, transverse view, with 2 different imaging planes Asterisks indicate anisotropy of retinaculum (see also Video 12) I-B-5) Retinaculum Vein Radius Ulna Distal Vein Scaphoid Lunate

Extensor carpi ulnaris tendon (Compartment VI) of left wrist, transverse view, with 2 different angles of insonation An asterisk indicates anisotropy of retinaculum (see also Video 13) I-B-5) Retinaculum Dorsal Ulnar

Orthogonal to tendon I-B-6) Tendon Middle Angled With flexion Dorsal aspect of left 3 rd proximal interphalangeal joint, longitudinal view, with 2 different angles of insonation and with flexion An asterisk indicates anisotropy of extensor digitorum tendon (see also Video 14, 15)

I-B-6) Tendon Orthogonal to tendon Angled Dorsal aspect of left 3 rd proximal interphalangeal joint, transverse view, with 2 imaging planes with different angles An asterisk indicates anisotropy of extensor digitorum tendon (see also Video 16)

I-B-7) Muscle ompartment IV Vein Radius Ulna part Radius Vein Compartment IV of extensor tendons in left wrist and its proximal part, transverse view Asterisks indicate muscle (see also Video 17)

I-B-7) Muscle Grayscale Radius Ulna Power Doppler part of extensor tendon compartment IV in left wrist, transverse view Asterisks indicate muscle Arrows indicate power Doppler signals in muscle (see also Video 18)

I-B-7) Muscle Vein Without flexion Radius Vein With flexion Radius Compartment IV of extensor tendons in left wrist and its proximal part, longitudinal view, with and without flexion of wrist Asterisks indicate muscle (see also Video 19)

Dorsal aspect of left wrist, longitudinal view An arrow indicates power Doppler signal in normal vessel R, radius; MC, metacarpal (see also Video 20) II-A Intra-articular normal vessels Grayscale R Scaphoid Trapezoid MC Power Doppler

II-A Intra-articular normal vessels Grayscale Trapezoid Capitate Power Doppler Dorsal aspect of left wrist, transverse view Arrows indicate power Doppler signals in normal vessel (see also Video 21)

II-B Reverberation Grayscale Metacarpal Artery Power Doppler Dorsal aspect of left 1 st metacarpophalangeal joint, longitudinal view Arrows indicate reverberation due to superficial artery (see also Video 22)

II-B Reverberation Grayscale Metacarpal Power Doppler Dorsal aspect of left 1 st metacarpophalangeal joint, transverse view Arrows indicate reverberation due to superficial artery (see also Video 23)