Normal Acetabular Angle Size in Boys: X-Ray & CT
Normal acetabular angle values in boys from newborn to age 2, measured on anteroposterior radiography, with clinical thresholds for developmental dysplasia.
Musculoskeletal
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Normal Acetabular Angle Size in Girls: Radiography & CT
Normal acetabular angle values in girls from newborn to age 2, measured on AP radiography, with clinical thresholds for developmental dysplasia of the hip.
Normal Achilles Tendon Width Size on Radiography, Ultrasound, CT & MRI
Normal Achilles tendon width measures 4–9 mm on lateral imaging; values outside this range suggest tendinopathy, partial tear, or rupture.
Normal Acromioclavicular Joint Space Size on Radiography
Normal acromioclavicular joint space measures less than 2–4 mm side-to-side difference on AP radiography, aiding detection of AC joint injury.
Normal Acromiohumeral Distance Size on Radiography
Learn the normal acromiohumeral distance on AP shoulder radiography and how values below 7 mm indicate rotator cuff pathology.
Normal Acromiohumeral Distance Size on Radiography
Normal acromiohumeral distance on AP shoulder radiography measures 7–11 mm; values below 7 mm suggest rotator cuff pathology.
Normal Anterior Drawer Sign Size on Radiography
Learn the normal threshold for the anterior drawer sign on lateral ankle radiography, its clinical significance, and measurement technique for ATFL instability.
Normal Atlanto-Temporomandibular Index Size on Radiography, CT, MRI
The atlanto-temporomandibular index normal value exceeds 22 mm on lateral imaging, serving as a key marker for craniocervical instability assessment.
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Normal Bernageau Length Size on Radiography
Normal Bernageau length ranges from -6 to +6 mm on lateral knee radiography, a key measurement for assessing patellar height and patellofemoral alignment.
Normal Blackburne-Peel Index Size on Radiography
The normal Blackburne-Peel Index on lateral knee radiography ranges from 0.5 to 1.0, serving as a key measure of patellar height.
Normal Böhler's Angle Size on Radiography and CT
Normal Böhler's angle measures 25–40° on lateral radiography and CT, serving as a key indicator of calcaneal fracture depression and alignment.
Normal Boogaard's Angle Size on X-ray, CT & MRI
Normal Boogaard's angle measures less than 135° on lateral imaging; values at or above this threshold suggest basilar invagination or platybasia.
Normal Bouman's Index No 1 Size on Radiography
Normal Bouman's Index No 1 ranges from 0.83–0.91 on posteroanterior radiography, serving as a key measure of ulnar carpal translation.
Normal Bouman's Index No 2 Carpal Height on Radiography
Normal Bouman's Index No 2 for carpal height on posteroanterior radiography ranges from 0.62 to 0.66, a key ratio for assessing wrist collapse.
Normal Bull's Angle Size on X-ray, CT & MRI
Normal Bull's angle of the cervical spine measures less than 13° on lateral radiography, CT, and MRI, serving as a key indicator of atlantoaxial instability.
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Normal Calcaneal Pitch Angle Size on Radiography
Normal calcaneal pitch on lateral foot radiography ranges from 10–30°, a key measurement for evaluating flatfoot and cavus deformities.
Normal Calcaneal-Fifth Metatarsal Angle Size on Radiography
Reference values for the normal calcaneal–fifth metatarsal angle on AP foot radiography across pediatric age groups, from newborn to age 9.
Normal Calcaneus–2nd Metatarsal Angle Size on Radiography
Normal calcaneus–2nd metatarsal angle on AP radiography measures 12–18°, a key landmark for assessing hindfoot and forefoot alignment.
Normal Capitolunate Angle Size on Radiography
Normal capitolunate angle on lateral wrist radiography ranges from -15° to 15°, a key measure for detecting carpal instability.
Normal Carpometacarpal Joint Space Size on Radiography
Normal carpometacarpal joint space measures 1–2 mm on radiography; learn measurement technique, clinical significance, and common pathology.
Normal Caton-Deschamps Index Size on Radiography
Normal Caton-Deschamps Index on lateral knee radiography ranges from 0.6 to 1.2, guiding diagnosis of patella alta and baja.
Normal Cervical Basal Angle Size on X-ray, CT & MRI
Normal cervical basal angle ranges from 125–143° on lateral imaging; values outside this range may indicate platybasia or craniovertebral junction anomalies.
Normal Cervical Interspinous Distance Size on Radiography, CT, MRI
Normal cervical interspinous distance should be less than 1.5× the mean interspinous distance — a key radiologic marker for ligamentous injury.
Normal Cervical Posterior Line Alignment on X-ray, CT, MRI
Normal cervical posterior line displacement is less than 2 mm on lateral radiography, CT, and MRI — a key marker for detecting instability.
Normal Cervical Wedge Compression Fracture Size on X-Ray & CT
Normal cervical wedge compression fracture threshold: posterior-to-anterior vertebral height difference less than 3 mm on lateral radiography and CT.
Normal CFL/ATFL Angle Size on MRI: Reference Values
The normal CFL/ATFL angle on MRI ranges from 70° to 140°, a key measurement for assessing lateral ankle ligament anatomy and injury.
Normal Chamay's Translation Index Size on Radiography
Normal Chamay's Translation index on posteroanterior wrist radiography ranges from 0.25 to 0.31, a key metric for assessing carpal ulnar translation.
Normal Chamberlain's Line Measurement: X-Ray, CT & MRI
Normal Chamberlain's line measures less than 3 mm odontoid tip projection on lateral radiography, CT, and MRI for craniovertebral junction assessment.
Normal Coracoclavicular Distance Size on Radiography
Normal coracoclavicular distance on AP radiography measures 11–13 mm, with a side-to-side difference of less than 5 mm indicating ligamentous integrity.
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Normal Digastric Line Cervical Measurements on X-ray, CT, MRI
Learn normal digastric line thresholds for atlanto-occipital and odontoid distances on radiography, CT, and MRI in cervical spine assessment.
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