Normal Radial Length Size on Wrist Radiography
Normal radial length on posteroanterior wrist radiography measures 10–13 mm, a key parameter for detecting distal radius fractures and malalignment.
Musculoskeletal
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Normal Radiocarpal Joint Space Size on Radiography
Normal radiocarpal joint space measures 2.0–2.5 mm on posteroanterior and lateral radiographs, with deviations indicating arthritis or ligamentous injury.
Normal Radiolunate Angle Size on Radiography
The normal radiolunate angle on lateral wrist radiography ranges from -15° to 15°, a key measurement for detecting carpal instability.
Normal Radioscaphoid Angle Size on Radiography
Normal radioscaphoid angle on lateral wrist radiography measures 30–60°, a key parameter for diagnosing carpal instability and scaphoid malalignment.
Normal Radioulnar Angle Size on Wrist Radiography
Normal radioulnar angle on PA wrist radiography measures 72–95°, a key parameter for assessing distal radius alignment and wrist biomechanics.
Normal Radius Angle Size on Wrist Radiography
Normal radius angle on lateral wrist radiography measures 79–94°, a key parameter for assessing distal radius alignment and fracture reduction.
Normal Radius Palmar Tilt Size on Radiography
Normal radius palmar tilt on lateral wrist radiograph measures 2–20°, a key parameter for assessing distal radius fracture alignment and reduction.
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Normal Scapholunate Angle Size on Radiography
The normal scapholunate angle on lateral wrist radiography measures 30–60°, a key parameter for diagnosing carpal instability and ligamentous injury.
Normal Scapholunate Distance Size on Radiography
Normal scapholunate distance on posteroanterior radiography measures less than 3 mm; values exceeding this threshold suggest ligamentous instability.
Normal Schmidt-Fischer Angle Size on X-ray, CT & MRI
Normal Schmidt-Fischer angle measures 124–127° at the odontoid, a key craniovertebral junction landmark assessed on radiography, CT, and MRI.
Normal Spinal Canal Diameter Size on X-Ray, CT & MRI
Normal spinal canal diameter ranges 17–22 mm in the thoracic spine and 15–25 mm in the lumbosacral spine on radiography, CT, and MRI.
Normal Spinal Canal Size in Stenosis: CT, MRI & X-Ray
Reference thresholds for spinal canal stenosis on CT, MRI, and radiography, covering cervical, thoracic, and lumbosacral measurements for clinical practice.
Normal Stahl's Lunate Index Size on Radiography
Normal Stahl's lunate index ranges from 0.50–0.56 on posteroanterior and lateral radiographs, a key ratio for assessing lunate morphology.
Normal Sulcus Angle Size on Radiography | Knee
The normal sulcus angle of the knee measures 126–150° on sunrise radiography, a key metric for assessing trochlear morphology and patellar instability.
Normal Suprapatellar Bursa Width on MRI
Normal suprapatellar bursa width on MRI measures less than 5 mm in the lateral dimension, with larger values suggesting joint effusion or bursitis.
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Normal Talar Dome–Tibial Plafond Distance on Radiography
Learn the normal talar dome–tibial plafond distance on radiography, including the >3 mm varus stress threshold that indicates ankle instability.
Normal Talar Tilt Angle Size on Radiography
Learn normal talar tilt angle values on radiography, how to measure them, and when values exceeding 10° indicate lateral ankle instability.
Normal Talar Tilt Angle Size on Radiography
Normal talar tilt angle on AP mortise radiography measures less than 10°, a key threshold for detecting lateral ankle ligamentous instability.
Normal Talar–1st Metatarsal Angle Size on Radiography
Reference values for the lateral talar–1st metatarsal angle on radiography in normal infants and children, from newborn through age 9.
Normal Talar–1st Metatarsal Angle Size on Radiography
Normal talar–1st metatarsal angle values on AP foot radiography vary by age, from 20° at birth to 10° at age 4, guiding flatfoot assessment.
Normal Talo-Calcaneal Index Size on Radiography
Learn the normal talo-calcaneal index on radiography, its clinical significance in flatfoot evaluation, and key measurement technique pearls.
Normal Talocalcaneal Angle Dorsiflexion Size on Radiography
Normal lateral talocalcaneal angle at maximal dorsiflexion on radiography ranges from 25–56° in newborns through age 9, varying by age group.
Normal Talocalcaneal Angle Size by Age on Radiography
Normal talocalcaneal angle values on lateral radiography range from 20° at birth to approximately 10° by age 4, varying by skeletal maturity.
Normal Talocalcaneal Angle Size on Radiography
Normal talocalcaneal angle values on radiography range by age, from 27–56° in newborns to 15–56° in children aged 4–9 years.
Normal Talocalcaneal Index Size on Radiography
Reference values for the normal talocalcaneal index on lateral radiographs in infants and children, from newborn through age 9.
Normal Talocrural Angle Size on Radiography
Normal talocrural angle measures 8–15° on AP mortise radiograph; deviations indicate fibular length abnormality or ankle instability.
Normal Talonavicular Coverage Angle Size on Radiography
Normal talonavicular coverage angle is less than 7° on AP radiography; values above this threshold indicate hindfoot malalignment and pes planus.
Normal Talus Declination Angle Size on Radiography
The normal talus declination angle measures 21° on lateral radiography, a key reference for assessing hindfoot biomechanics and foot arch alignment.
Normal Tarsometatarsal Joint Space Size on Radiography
Normal tarsometatarsal joint space measures 2.0–2.5 mm on radiography; deviations may indicate Lisfranc injury or arthropathy.
Normal Thoracic Wedge Compression Fracture Size on X-Ray/CT
Normal anterior-to-posterior vertebral height difference in thoracic wedge compression fracture is less than 3 mm on lateral radiography and CT.
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