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Radiology Orthopaedic Topics

Imaging interpretation & modalities. 70 evidence-informed references covering conditions, classifications, management and high-yield exam notes for FRCS (Tr&Orth), FRACS, EBOT and ABOS preparation.

Browse & filter all Radiology topics interactively →Exam tracks

All Radiology topics (70)

  • 3D Printing from Imaging: Surgical PlanningGuide to 3D printing applications in orthopaedic surgery including patient-specific models, surgical guides, and custom implants derived from imaging data.
  • Acro-osteolysisPattern and differential for acro-osteolysis: distinguishing tuft from band-like resorption, and the discriminators separating scleroderma, psoriasis, hyperparathyroidism, neuropathy and PVC exposure.
  • AI in Orthopaedic RadiologyOverview of artificial intelligence applications in orthopaedic radiology including fracture detection, arthroplasty planning, and image analysis for fellowship exam awareness.
  • Ankle & Foot Imaging: Systematic InterpretationSystematic approach to ankle and foot imaging including plain radiography, CT, and MRI for trauma, arthritis, osteochondral lesions, and soft tissue pathology.
  • Anterior Vertebral BeakingPattern and differential for anterior vertebral beaking on lateral spine radiographs: central versus inferior beak, dysostosis multiplex, hypothyroidism and the discriminators that separate them.
  • Arthritis on RadiographsPattern-based approach to arthritis on plain films: distribution, erosions, joint space, bone density and new bone formation as the discriminators between the arthritides.
  • Arthrography TechniquesComprehensive guide to arthrography techniques in orthopaedic imaging covering direct and indirect MR arthrography, CT arthrography, joint injection protocols, and clinical applications for fellowship exam preparation.
  • Arthroplasty Imaging: Assessment & ComplicationsComprehensive guide to imaging assessment of joint arthroplasty including component position, alignment, and recognition of complications such as loosening, infection, wear, and instability.
  • Bone Scan InterpretationComprehensive guide to bone scan interpretation covering systematic reading approach, classic uptake patterns, anatomical correlation, and clinical applications in orthopaedic practice for fellowship exam preparation.
  • Bone-in-Bone VertebraPattern and differential for the bone-in-bone (vertebra within a vertebra) sign: physiological neonatal, bisphosphonate therapy, osteopetrosis, growth arrest and the mimics.
  • ChondrocalcinosisPattern and differential page for chondrocalcinosis: how to confirm cartilage calcification, discriminate CPPD from haemochromatosis, hyperparathyroidism and gout, and what to test next.
  • Classic Radiological Signs: ArthritisCollection of classic radiological signs in arthritis and inflammatory conditions including OA, RA, gout, and seronegative arthropathies.
  • Contrast Agents and SafetyComprehensive guide to contrast agents used in orthopaedic imaging covering iodinated CT contrast, gadolinium MRI contrast, allergic reactions, contrast-induced nephropathy, and safety protocols for fellowship exam preparation.
  • CT Imaging PrinciplesComprehensive guide to CT imaging principles covering physics of acquisition, image reconstruction, Hounsfield units, radiation dose considerations, and systematic orthopaedic applications for fellowship exam preparation.
  • CT Physics, Radiation Dose & Hounsfield UnitsFellowship-level guide to the physics of computed tomography for the orthopaedic surgeon - how a rotating X-ray tube and detectors reconstruct cross-sectional images from attenuation data, the Hounsfield (CT-number) scale referenced to water and air with windowing, the key acquisition parameters (kVp, mAs, pitch, slice thickness) and how they trade image quality against radiation dose, dose metrics (CTDIvol, DLP, effective dose) and the ALARA principle - with the practical message of low-dose protocols, harmonisation and protecting young patients/women of childbearing age.
  • Describing a Bone Tumour RadiographA pattern-and-differential approach to the bone lesion radiograph: Lodwick grade, zone of transition, periosteal reaction, matrix and site — with the discriminator for each cause.
  • DEXA Bone DensitometryComprehensive guide to DXA bone densitometry covering physics, T-score and Z-score interpretation, WHO classification, FRAX risk assessment, and clinical decision-making for osteoporosis management in fellowship exam preparation.
  • Diaphyseal Bone LesionPattern and differential for a lesion centred on the shaft of a long bone: how to describe it, the discriminators that separate each cause, and the next test.
  • Epiphyseal Bone LesionPattern and differential for a lucent lesion centred on the epiphysis or subarticular bone: age-based discriminators, must-not-miss causes and the next investigation.
  • Erlenmeyer Flask DeformityPattern and differential for the Erlenmeyer flask deformity: how to confirm the sign, the discriminators that separate Gaucher, thalassaemia, osteopetrosis and Pyle disease, and the next test.
  • Fluoroscopy PrinciplesComprehensive guide to fluoroscopy principles covering image generation, radiation exposure, dose reduction strategies, and intraoperative orthopaedic applications for fellowship exam preparation.
  • Generalised OsteopeniaPattern and differential for generalised osteopenia on radiographs: separating osteoporosis from osteomalacia, hyperparathyroidism, myeloma and marrow infiltration by discriminating features.
  • Generalised OsteosclerosisPattern and differential for diffusely dense bones on radiograph: how to confirm true generalised sclerosis, the discriminators separating myelofibrosis, sclerotic metastases, renal osteodystrophy and osteopetrosis.
  • Imaging in Pregnancy: Safety and Decision-MakingEvidence-based guide to imaging pregnant orthopaedic patients, covering radiation risk, modality choice, contrast use, and emergency imaging decisions.
  • Imaging Musculoskeletal InfectionComprehensive guide to systematic imaging of musculoskeletal infection covering osteomyelitis, septic arthritis, PJI, and spinal infection with modality selection and MRI interpretation for fellowship exam preparation.
  • Imaging the ElbowComprehensive guide to systematic elbow imaging covering standard radiographic views, fat pad signs, MRI assessment, and clinical applications for fractures, ligament injury, and epicondylar pathology.
  • Imaging the KneeComprehensive guide to systematic knee imaging covering standard radiographic views, weight-bearing assessment, MRI for ligaments and menisci, and clinical applications for fellowship exam preparation.
  • Imaging the Pelvis and HipComprehensive guide to systematic pelvis and hip imaging covering AP pelvis assessment, Shenton line, neck of femur fracture detection, AVN staging, and hip labral evaluation for fellowship exam preparation.
  • Imaging the ShoulderComprehensive guide to systematic shoulder imaging covering standard radiographic views, MRI sequences, rotator cuff assessment, instability imaging, and clinical decision-making for fellowship exam preparation.
  • Imaging the SpineComprehensive guide to systematic spine imaging covering radiographic alignment assessment, MRI for disc herniation and cord compression, fracture characterisation, and red flag detection for fellowship exam preparation.
  • Ivory Vertebra: Pattern and DifferentialA single diffusely sclerotic vertebral body — how to confirm the sign, separate metastasis from lymphoma from Paget's disease, and choose the next investigation.
  • Labelled White Cell Scanning for InfectionEvidence-based guide to labelled white cell scintigraphy for osteomyelitis and prosthetic joint infection, including protocol, interpretation, and limitations.
  • Lucent Bone LesionPattern and differential for the lucent (radiolucent) bone lesion: how to describe it, the FEGNOMASHIC differential with real discriminators, and how to narrow by age, site and zone of transition.
  • Lytic Lesion with a Sclerotic RimPattern and differential for a lytic bone lesion with a sclerotic margin: how to confirm a genuine narrow zone of transition, the discriminators for each cause, and when to stop imaging.
  • Metabolic Bone Disease: Imaging FeaturesComprehensive guide to imaging features of metabolic bone diseases including osteoporosis, Paget's disease, hyperparathyroidism, and renal osteodystrophy for fellowship exam preparation.
  • MRI Bone Marrow SignalComprehensive guide to MRI bone marrow signal interpretation including normal marrow conversion, red vs yellow marrow, pathological signal patterns, and systematic differential diagnosis of marrow lesions for fellowship exam preparation.
  • MRI Cartilage AssessmentComprehensive guide to MRI cartilage assessment including optimal sequences, grading systems, cartilage repair monitoring, and clinical decision-making for fellowship exam preparation.
  • MRI Contraindications and ImplantsComprehensive guide to MRI safety in patients with orthopaedic and non-orthopaedic implants, covering absolute and relative contraindications, MRI-conditional labelling, and artefact reduction strategies for fellowship exam preparation.
  • MRI Imaging PrinciplesComprehensive guide to MRI physics including magnetic field principles, signal generation, T1 and T2 relaxation, pulse sequences, and systematic orthopaedic applications for fellowship exam preparation.
  • MRI Metal Artefact Reduction (MARS)Comprehensive guide to MRI metal artefact reduction techniques for imaging patients with orthopaedic implants including MARS sequences, protocol optimisation, and clinical applications.
  • MRI Neurography: Peripheral Nerve ImagingGuide to MRI neurography for peripheral nerve imaging including techniques, normal anatomy, and pathological patterns for fellowship exam preparation.
  • MRI SequencesComprehensive guide to MRI pulse sequences used in orthopaedic practice including T1, T2, PD, STIR, GRE, and advanced techniques with clinical applications and protocol selection for fellowship exam preparation.
  • MRI Soft Tissue InterpretationGuide to MRI interpretation of soft tissue structures including muscles, tendons, ligaments, and soft tissue masses with signal characteristics and pathological patterns.
  • Multiloculated (Bubbly) Bone LesionPattern-based approach to the multiloculated soap-bubble bone lesion: discriminators for ABC, GCT, NOF, chondromyxoid fibroma, fibrous dysplasia and telangiectatic osteosarcoma.
  • Nuclear MedicineComprehensive guide to nuclear medicine imaging in orthopaedics covering bone scintigraphy, three-phase bone scan, PET-CT, labelled white cell scans, and clinical applications for infection, tumour, and metabolic bone disease evaluation.
  • Paediatric Imaging PrinciplesComprehensive guide to paediatric imaging principles covering radiation safety, ALARA, modality selection for the growing skeleton, ossification centre assessment, and age-appropriate imaging protocols for fellowship exam preparation.
  • Periosteal Reaction PatternsHow to read periosteal reaction on plain film: continuous versus interrupted, Codman triangle, onion-skin and sunburst, and the differential each pattern generates.
  • PET-CT in Orthopaedic OncologyGuide to PET-CT applications in orthopaedic oncology including staging, treatment response assessment, and detection of recurrence for fellowship exam preparation.
  • Plain Radiography PrinciplesComprehensive guide to plain radiography principles including X-ray production physics, image formation, systematic interpretation approaches, radiation safety, and quality optimisation for orthopaedic fellowship exam preparation.
  • PlatyspondylyPattern and differential for platyspondyly: how to confirm flattened vertebrae, discriminate universal from focal forms, and the imaging that separates dysplasia from malignancy.
  • Polyostotic Bone LesionsPattern and differential for multiple bone lesions: metastases, myeloma, fibrous dysplasia, Langerhans cell histiocytosis, enchondromatosis and infection, with the discriminator for each.
  • Predicting Bone Tumour by AgeAge is the single most powerful discriminator in bone tumour radiology. A pattern page for generating and narrowing a lesion differential by decade, site and matrix.
  • Radiation SafetyComprehensive guide to radiation safety for orthopaedic surgeons covering ionising radiation biology, occupational exposure, dose limits, protection equipment, and ALARA implementation for fellowship exam preparation.
  • Radiological Signs in Bone TumoursComprehensive guide to radiological signs in bone tumours covering aggressive vs non-aggressive features, periosteal reactions, matrix mineralisation, tumour location, and staging imaging for fellowship exam preparation.
  • Radiological Signs in Paediatric OrthopaedicsComprehensive guide to radiological signs in paediatric orthopaedics covering DDH assessment lines, SUFE Klein line, Perthes staging, Salter-Harris classification, and growth plate imaging for fellowship exam preparation.
  • Radiological Signs in TraumaComprehensive guide to classic radiological signs in musculoskeletal trauma covering named fractures, pathognomonic signs, and pattern recognition for fellowship exam preparation.
  • Regional (Local) OsteopeniaPattern and differential for regional osteopenia on radiographs: disuse, CRPS, transient osteoporosis, infection, inflammatory arthritis and permeative tumour, with discriminators.
  • Schmorl NodePattern and differential for the Schmorl node — vertebral endplate depression on radiograph and MRI, how to confirm it, and how to separate benign herniation from infection, metastasis and fracture.
  • Sclerotic Bone LesionPattern and differential for the sclerotic bone lesion: bone island vs osteoblastic metastasis vs osteosarcoma, with discriminators, algorithm and viva scenarios.
  • Sclerotic Cortical LesionPattern and differential for a sclerotic cortical bone lesion: discriminators separating osteoid osteoma, stress fracture, Brodie's abscess, adamantinoma and cortical osteosarcoma.
  • Small Round Blue Cell Tumours of BonePattern and differential page for the small round blue cell tumour of bone: Ewing sarcoma, lymphoma, metastatic neuroblastoma, LCH and osteomyelitis, with the discriminator for each.
  • Soft-Tissue Calcification versus OssificationA pattern-based approach to distinguishing soft-tissue calcification from heterotopic ossification on radiographs, with discriminators for each cause and the next test that changes management.
  • SPECT-CT ApplicationsComprehensive guide to SPECT-CT in orthopaedics covering technology principles, clinical applications for arthritis, prosthetic assessment, infection, and tumour evaluation for fellowship exam preparation.
  • Trauma ImagingSystematic approach to trauma imaging including modality selection, ATLS principles, polytrauma protocols, and imaging pitfalls in the acute setting.
  • Tumour Imaging: ABCDS ApproachSystematic approach to musculoskeletal tumour imaging using the ABCDS framework, including characteristic features of common benign and malignant lesions for fellowship exam preparation.
  • Ultrasound in Musculoskeletal PracticeComprehensive guide to musculoskeletal ultrasound covering physics, transducer selection, systematic examination technique, common orthopaedic applications, and ultrasound-guided interventions for fellowship exam preparation.
  • Ultrasound Physics (Principles, Transducers, Doppler & Artefacts)Fellowship-level guide to the physics of diagnostic (musculoskeletal) ultrasound - high-frequency sound generated by a piezoelectric transducer, the pulse-echo principle and the fundamental frequency-resolution-penetration trade-off, image modes (A/B/M-mode) and Doppler (colour, power, spectral), and the common artefacts (anisotropy, acoustic shadowing, posterior enhancement, reverberation, mirror image) - emphasising how recognising artefacts (especially anisotropy) avoids misdiagnosis and how to optimise the image, for the orthopaedic exam.
  • Vertebra PlanaPattern and differential for vertebra plana: how to confirm complete vertebral body collapse, discriminate LCH from malignancy and infection, and choose the next investigation.
  • Weight-Bearing CT: Principles & ApplicationsEvidence-based guide to weight-bearing CT in orthopaedics, covering technique, indications, systematic interpretation, and current foot-and-ankle applications.
  • Wrist & Hand Imaging: Systematic InterpretationSystematic approach to wrist and hand imaging including plain radiography, CT, and MRI for trauma, carpal instability, and soft tissue pathology.

Other subspecialties

TraumaSpineHand & Upper LimbFoot & AnkleSports MedicineAdult ReconstructionPaediatricsOncologyBasic ScienceInfectionAnatomy & ApproachesProfessionalism & Ethics