TABLE 2:

Cartilage Evaluation by Semiquantitative Whole-Organ Scoring Systems for Hip Osteoarthritis

Characteristics of MRI and Scoring Systems	Neumann et al. [69]	HOAMS [63]	SHOMRI [12]
Sequences	Sagittal, coronal, and axial T1-weighted fat-saturated spin-echo sequence after direct injection of gadopentetate dimeglumine	Sagittal and coronal proton density–weighted FS FSE sequence and sagittal 2D MEDIC sequence	Sagittal, oblique coronal, and oblique axial intermediate-weighted FS FSE sequence
B0 field strength (T)	1.5	1.5	3
Concept of subregional division	One central subregion and four symmetric radially separated regions	Composite regional scores both for acetabular and femoral cartilage: anterior and posterior regions encompassing 9–10 mm of anterior and posterior femoral head, respectively, as shown in sagittal images; subdivision of central region in subregions follows both anatomic landmarks and geometric measurements	Anterior and posterior regions encompassing 1 cm of anterior and posterior femoral head, respectively, as shown in sagittal images; subdivision of midportion follows anatomic landmarks
Division of acetabular cartilage	5 Subregions: anterior, posterior, central, medial, lateral	9 Subregions, scored together for acetabular and femoral cartilage: anterior-superior, anteroinferior, central-lateral, central-superior, central-central, central-inferior, central-medial, posterior-superior, posterior-inferior	4 Subregions: anterior, superolateral, superomedial, posterior
Division of femoral cartilage	5 Subregions: anterior, posterior, central, medial, lateral	Graded together with acetabular cartilage	6 Subregions: anterior, lateral, superolateral, superomedial, inferior, posterior
Cartilage scoring per subregion	0 = normal, 1 = signal heterogeneity, 2 = fissuring < 1 mm, 3 = thinning < 50%, 4 = thinning > 50%, 5 = full-thickness loss	0 = normal cartilage, 1 = focal partial-thickness defect (< 25% of subregional area), 2 = focal full-thickness defect (≤ 25% of subregional area), 3 = several partial-thickness defects or a single but larger superficial defect (≤ 25% of subregional area), 4 = several large full-thickness defects or single but full-thickness defect (> 25% of subregional area)	0 = no cartilage thickness loss, 1 = partial-thickness loss, 2 = full-thickness loss
Cartilage lesion width scoring	A ≤ 1 cm; B = 1–2 cm; C = 2–3 cm; D = 3–4 cm; E ≥ 4 cm	As part of the subregional score (see above)	Lesions > 1 cm diameter spanning two regions are scored in both regions; smaller lesions are scored in only one region

Note—HOAMS = Hip Osteoarthritis MRI Scoring System, SHOMRI = scoring hip osteoarthritis with MRI, FS = fat-suppressed, FSE = fast spin-echo, MEDIC = Multi-Echo Data Image Combination (Siemens Healthcare).