Musculoskeletal Imaging
Bone lesion reporting and follow-up frameworks.
ACR Bone-RADS (2023) scores six radiographic features of a potentially neoplastic bone lesion — margination, periosteal reaction, endosteal scalloping, pathological fracture, extra-osseous soft-tissue mass, and known primary cancer — and maps the point total to risk categories 1–4 with management suggestions.
Classifies pediatric growth-plate (physeal) fractures into types I through V by the path of the fracture line relative to the metaphysis, physis, and epiphysis. Higher types carry progressively greater risk of growth arrest and more often need surgery.
Estimates remaining skeletal growth from ossification and fusion of the iliac apophysis on a frontal pelvis or scoliosis radiograph. Both grading traditions are supported: the US system (stages 0-5, dividing the crest into quarters) and the French system (stages 0-4, dividing it into thirds).
Grades intracapsular femoral neck fractures I through IV on an AP radiograph by completeness and displacement, using the alignment of femoral head and acetabular trabeculae. The key clinical dichotomy is nondisplaced (I-II) versus displaced (III-IV).
Classifies proximal humerus fractures by counting how many of the four anatomic segments - articular head, greater tuberosity, lesser tuberosity, and shaft - are displaced. A segment counts as displaced when it is separated by more than 1 cm or angulated more than 45 degrees.
Radiographic grading of osteoarthritis severity from 0 (none) to 4 (severe) based on osteophytes, joint-space narrowing, subchondral sclerosis, and bony deformity. Originally described for multiple joints and most often applied to the knee.
Grades anterior vertebral slip in spondylolisthesis by the percentage of the superior vertebral body overhanging the inferior endplate. Enter percent slip; the tool assigns Meyerding grade I–V (spondyloptosis).
Assesses thoracolumbar fracture stability by which of Denis’s three spinal columns are injured. Select involved columns; the result states the stability implication (middle-column and two-contiguous-column injuries are unstable).
Unified staging calculator for femoral head osteonecrosis. Choose Ficat-Arlet or the revised ARCO system, then select the stage whose imaging criteria match the study.
Classifies lateral malleolar (fibular) fractures by height relative to the distal tibiofibular syndesmosis: A infrasyndesmotic, B transsyndesmotic, C suprasyndesmotic. Guides stability and fixation decisions.
Mechanism-based ankle fracture classification. Select the injury pattern (foot position + force) and the highest stage reached; the tool lists the expected sequential structures injured.
Grades open fractures by wound size, contamination, soft-tissue damage/coverage, and vascular injury (I, II, IIIA, IIIB, IIIC). Drives antibiotic choice, timing of debridement, and reconstructive needs. Final grade is intraoperative.
Six-type classification of tibial plateau fractures by location and morphology (lateral split, split-depression, pure depression, medial, bicondylar, and metadiaphyseal dissociation). Higher types reflect higher energy and worse prognosis.
Six-type classification of acromioclavicular joint injuries based on AC and coracoclavicular ligament integrity and the direction/magnitude of clavicular displacement relative to the acromion.
Classifies pediatric extension-type supracondylar humerus fractures (I–III, optional IV) and checks the Baumann angle against the normal complementary range (~9–26°) to flag coronal malalignment risk.
Mechanism-based classification of pelvic ring injuries (LC-I/II/III, APC-I/II/III, vertical shear, combined mechanism). Result notes approximate Tile/AO stability letter (A/B/C) as a cross-reference.
Grades articular cartilage lesions from 0 (normal) to IV (full-thickness with exposed bone) using descriptors aligned with modified Outerbridge (MRI/arthroscopy) and ICRS depth-based criteria.
Grades radiographic aggressiveness of lytic bone lesions by margin and zone of transition (modified Lodwick-Madewell IA–IIIC). Higher grades imply faster growth and greater likelihood of malignancy, with important benign exceptions.
Assigns the ASIA Impairment Scale (AIS A–E) from ISNCSCI criteria based on sacral sparing and motor completeness. Result details include the roughly corresponding historical Frankel grade.