Normal Ventriculomegaly Grading Size on Ultrasound MRI CT
Learn the standard ventriculomegaly grading thresholds—mild, moderate, and severe—measured on coronal imaging by ultrasound, MRI, and CT.
CT
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Normal Vermiform Appendix Diameter: Ultrasound, CT & MRI
Normal vermiform appendix diameter is <6 mm on ultrasound and <8 mm on CT; exceeding these thresholds raises concern for acute appendicitis.
Normal Vestibular Aqueduct Canal Size: CT Reference
Normal vestibular aqueduct canal diameter is less than 1.5 mm on CT; values at or above this threshold suggest enlargement and inner ear pathology.
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Normal Wackenheim's Angle Size on X-ray, CT & MRI
Normal Wackenheim's angle measures >150° on lateral imaging; learn its clinical significance for craniocervical junction stability assessment.
Normal Wedge Compression Fracture Size on Radiography & CT
Normal anterior-posterior vertebral height difference for lumbosacral wedge compression fracture is <3 mm on lateral radiography and CT.
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