Table 2.

Descriptive data of the anatomical structures assessed

Anatomical structure	N	Median [minimum - maximum]
Cartilage*
Femoral head	488	2.5 [0.4–10.3]
Trochlea knee	496	3.0 [1.4–5.8]
Talar dome	494	1.5 [0.1–6.1]
Head of 1st metatarsal bone	489	1.8 [0.4–7.3]
Head of 2nd metacarpal bone	489	1.5 [0.5–6.9]
Bone-capsular distance#
Acetabulofemoral recess	485	3.4 [0.9–9.1]
Suprapatellar recess	489	0.0 [0.0–11.6]
Parapatellar recess	461	0.0 [0.0–3.2]
Tibiotalar recess	495	0.0 [0.0–3.7]
Recess MTP1 joint	494	0.0 [0.0–4.1]
Lateral radiohumeral recess	495	0.0 [0.0–0.8]
Anterior radiohumeral recess	495	0.0 [0.0–4.2]
Posterior fossa elbow	493	0.0 [0.0–5.1]
Radiolunate recess	473	0.0 [0.0–2.8]
Lunate-capitate recess	472	0.0 [0.0–1.5]
Capitate-metacarpal 3 recess	473	0.0 [0.0–1.8]
Recess MCP2 joint	492	0.0 [0.0–1.8]
Tendons†
Biceps tendon	497	5.0 [1.5–9.3]
Patellar tendon	497	22.3 [2.9–40.6]
Extensor digitorum communis tendon	489	10.7 [3.4–24.6]
Extensor carpi ulnaris tendon	481	6.1 [2.0–11.5]
Flexor digitorum (superficial and profound) tendon of the 2nd finger	484	6.4 [2.7–10.8]

All measures are in millimeters (mm). N = number; MCP2: 2nd metacarpophalangeal joint; 1st MTP: first metatarsophalangeal joint

*: the maximal thickness of the cartilage layer was measured (incl. hyaline cartilage and cartilage surface if visible), perpendicular to the bone cortex

#: the maximal distance between the capsular layer and underlying bone cortex was measured

†: the maximum diameter of the tendon in the transverse view was measured, including the synovial sheet if present