Normal Abdominal Lymph Node Size on CT and MRI
Reference guide for normal abdominal lymph node size thresholds by location on CT and MRI, including porta hepatis, paraaortic, and mesenteric stations.
Abdomen
39 entries · Page 1 of 2
A
Normal Adrenal Gland Arm Thickness Size on CT and MRI
Normal adrenal gland arm thickness measures less than 3 mm on CT and MRI; values above this threshold raise concern for adrenal pathology.
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.
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Normal Caecum Size on Radiography and CT: <9 cm
The normal caecum measures less than 9 cm in anteroposterior diameter on radiography and CT; exceeding this threshold indicates clinically significant distension.
Normal Colon Diameter Size on Radiography and CT
Normal colonic diameter is less than 6 cm on radiography and CT; values above this threshold indicate significant dilation requiring prompt evaluation.
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 Diameter on Cholangiography
Reference values for normal common bile duct maximal diameter on cholangiography in children aged 0–14 years, based on Witcombe & Cremin 1978.
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.
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 Esophageal Diameter in Children: Barium Swallow
Reference values for normal esophageal maximal diameter on barium swallow in pediatric patients, from neonates through adolescents aged 16 years.
Normal Esophageal Wall Thickness on CT: Key Reference
Normal esophageal wall thickness on CT is less than 5 mm; values exceeding this threshold warrant further evaluation for pathology.
F
Normal Feeding Tube Position on Radiography
Normal nasogastric feeding tube tip should lie >10 cm beyond the gastroesophageal junction on radiography to confirm safe gastric placement.
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.
Normal Gallbladder Wall Thickness on Ultrasound
Normal gallbladder wall thickness on ultrasound is under 3 mm in adults and varies by age in pediatric patients, aiding detection of cholecystitis and other pathology.
Normal Gastric Band Size on Fluoroscopy & Radiography
Learn the normal gastric band measurements on fluoroscopy and radiography, including the >5 mm threshold that signals clinically significant slippage or obstruction.
Normal Gastric Distension Size on Radiography
Learn the normal and abnormal thresholds for gastric distension on plain radiography, including clinical implications and measurement technique.
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Normal Intrahepatic Duct Size on Ultrasound, CT & MRI
Normal intrahepatic bile ducts measure less than 2 mm in diameter; values exceeding this threshold suggest biliary dilatation requiring clinical correlation.
L
Normal Liver Diameter Size by Age: Ultrasound, CT & MRI
Reference guide for normal liver diameter measured in the midclavicular line across all age groups on ultrasound, CT, and MRI imaging.
Normal Liver Segments Anatomy on Ultrasound
A concise ultrasound reference for normal liver segment anatomy based on the Couinaud classification, essential for lesion localization and surgical planning.
M
Normal Microcolon Size on Barium Enema: Key Reference
Normal microcolon diameter measures less than 1 cm on barium enema, a critical threshold for diagnosing neonatal bowel obstruction.
N
Normal Neonatal Adrenal Gland Size on Ultrasound
Reference values for normal neonatal adrenal gland size on ultrasound, including maximal diameter, length, and thickness in newborns.
Normal Newborn Gastrointestinal Air Progression on Radiography
Normal newborn gastrointestinal air reaches the stomach by 2 hours, small bowel by 6 hours, and rectum by 24 hours on plain radiography.
P
Normal Pancreas Diameter Size on Ultrasound
Reference guide to normal pancreas anteroposterior diameter on ultrasound across all age groups, from neonates to adults.
Normal Papilla of Vater Diameter on Ultrasound and CT
Normal papilla of Vater diameter is less than 10 mm on CT and ultrasound; enlargement beyond this threshold warrants further clinical investigation.
Normal Phi Angle Size on Fluoroscopy and Radiography
The normal phi angle measures 30–60° on fluoroscopy and radiography, a key landmark for assessing gastric band position after laparoscopic adjustable gastric banding.
Normal Presacral Space Size on Barium Enema in Children
Normal presacral space measures less than 5 mm on barium enema in children aged 0–15 years; enlargement may indicate inflammatory or neoplastic pathology.
Normal Pylorus Diameter & Thickness on Ultrasound
Normal pyloric muscle thickness is <3 mm and channel length <15 mm on ultrasound; values above these thresholds suggest hypertrophic pyloric stenosis.
R
Normal Rectosigmoid Index Size on Barium Enema
Learn the normal rectosigmoid index on barium enema, its measurement technique, and clinical role in diagnosing Hirschsprung's disease.
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