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.
Ultrasound
89 entries · Page 1 of 3
A
Normal Amniotic Fluid Index Size on Ultrasound
Learn the ultrasound threshold for polyhydramnios: an amniotic fluid index (AFI) greater than 25 cm defines abnormal amniotic fluid volume in pregnancy.
Normal Amniotic Fluid Index Size on Ultrasound >24 Weeks
Learn the normal amniotic fluid index (AFI) threshold on ultrasound after 24 weeks and the clinical significance of AFI below 5 cm.
Normal Aortic Diameter Size on Ultrasound, CT & MRI
Reference guide to normal aortic diameter measurements by segment on ultrasound, CT, and MRI, based on EAE clinical practice recommendations.
Normal Appendix Wall Thickness on Ultrasound, CT & MRI
Normal vermiform appendix wall thickness measures less than 3 mm on ultrasound, CT, and MRI — a key threshold for excluding appendicitis.
B
Normal Bladder Wall Thickness on Ultrasound, MRI & CT
Normal bladder wall thickness is <3 mm when distended and <5 mm when non-distended on ultrasound, MRI, and CT imaging.
C
Normal Cephalic Index Size on Obstetric Ultrasound
The normal fetal cephalic index ranges from 75–85 on obstetric ultrasound, helping detect head shape abnormalities that affect biometric accuracy.
Normal Cervical Length in Pregnancy: Ultrasound Reference
Normal cervical length before 36 weeks gestation is greater than 3 cm on ultrasound; shorter measurements indicate increased risk of preterm labor.
Normal Cervical Lymph Node Size on CT, MRI & Ultrasound
Reference thresholds for pathological cervical lymph node enlargement by level on CT, MRI, and ultrasound in head and neck imaging.
Normal Cervical Lymph Node Size on Ultrasound, CT & MRI
Learn the pathological enlargement thresholds for cervical lymph nodes by level on ultrasound, CT, and MRI, based on evidence-based radiology criteria.
Normal Colon Wall Thickness on Ultrasound and CT
Normal colon wall thickness measures less than 3–5 mm on CT and ultrasound; values above this threshold suggest pathology requiring further evaluation.
Normal Common Bile Duct Diameter by Age: Ultrasound
Reference values for normal common bile duct maximal diameter on ultrasound in pediatric patients, from neonates through adolescence.
Normal Common Bile Duct Size on CT, MRI & Ultrasound
Normal common bile duct diameter is <6 mm without cholecystectomy and <10 mm post-cholecystectomy on CT, MRI, and ultrasound.
Normal Common Hepatic Duct Size on Ultrasound, CT & MRI
The normal common hepatic duct measures less than 5 mm in diameter on ultrasound, CT, and MRI in adults without biliary pathology.
Normal Common Iliac Artery Diameter: Ultrasound, CT & MRI
Normal common iliac artery diameter ranges 7.9–12.1 mm on axial imaging; learn measurement technique and clinical thresholds across ultrasound, CT, and MRI.
D
Normal Duct of Wirsung Diameter: Ultrasound, CT & MRI
Normal Duct of Wirsung diameter is <3 mm at the pancreatic head and <2 mm in the body/tail on ultrasound, CT, MRI, and cholangiography.
E
Normal Endometrium Thickness on Ultrasound and MRI
Reference guide to normal endometrial thickness by menopausal status on ultrasound and MRI, with clinical thresholds for workup.
Normal Epididymis Resistance Index on Ultrasound
Normal epididymis resistance index on Doppler ultrasound ranges from 0.46 to 0.68, a key parameter for evaluating scrotal pathology.
Normal Epididymis Size on Ultrasound: Key Dimensions
Reference guide to normal epididymis dimensions on scrotal ultrasound, including head, body, and tail measurements for clinical practice.
F
Normal Fallopian Tube Size on Ultrasound, CT & MRI
Normal fallopian tube length is <14 cm and diameter <4 mm; learn measurement techniques across ultrasound, CT, MRI, and hysterosalpingography.
Normal Femoral Artery Diameter on Ultrasound, CT & MRI
Reference values for normal femoral artery diameter on ultrasound, CT, and MRI: common femoral 6.6–9.6 mm, superficial femoral 4.3–7.2 mm.
Normal Femoral Artery Peak Systolic Velocity on Ultrasound
Normal femoral artery peak systolic velocity ranges 89–141 cm/s (common) and 77–108 cm/s (superficial) on duplex ultrasound.
Normal Fetal Heart/Thorax Area Ratio Size on Ultrasound
Normal fetal heart/thorax area ratio on ultrasound measures 0.2–0.35, a key four-chamber view parameter for detecting cardiomegaly or small heart.
Normal Fetal Heart/Thorax Circumference Ratio Ultrasound
Normal fetal heart circumference to thorax circumference ratio is less than 0.5 on ultrasound, a key marker for cardiomegaly assessment.
Normal Fetal Lateral Ventricle Diameter Size on Ultrasound
Normal fetal lateral ventricle diameter measures less than 10 mm on coronal ultrasound — a key threshold for detecting ventriculomegaly in obstetric imaging.
Normal Fetal Renal Pelvis Diameter Size on Ultrasound
Normal fetal renal pelvis diameter is <4 mm before 32 weeks and <7 mm after 32 weeks on prenatal ultrasound, guiding hydronephrosis assessment.
Normal Fetal Thorax/Abdomen Circumference Ratio on Ultrasound
Normal fetal thorax-to-abdomen circumference ratio is >0.77 on ultrasound, a key marker for detecting thoracic hypoplasia and lethal skeletal dysplasias.
Normal Filum Terminale Size on Ultrasound and MRI
Normal filum terminale diameter is less than 2 mm on ultrasound and MRI; values at or above this threshold suggest a thickened filum and possible tethered cord.
Normal Fourth Ventricle Size on Ultrasound MRI CT: Neonates
Normal fourth ventricle sagittal diameter measures 4 mm in newborns on ultrasound, MRI, and CT—key reference for neonatal neuroimaging.
G
Normal Gallbladder Diameter & Size on Ultrasound
Reference values for normal gallbladder diameter and dimensions on ultrasound in adults and children, with clinical thresholds and measurement technique pearls.
No entries match your filter.