Normal Main Left Bronchus Diameter on Radiography
The normal main left bronchus diameter on posteroanterior radiography measures less than 2.3 cm, a key threshold for detecting bronchial pathology.
Radiology References
Imaging atlases, normal values, and reporting templates.
302 references · Page 6 of 11
M
Normal Maximum Vertical Pocket Size on Ultrasound
Learn the normal and abnormal Maximum Vertical Pocket thresholds on obstetric ultrasound, including the >8 cm cutoff for polyhydramnios diagnosis.
Normal Maximum Vertical Pocket Size on Ultrasound >24 Weeks
Learn the normal maximum vertical pocket threshold for diagnosing oligohydramnios after 24 weeks on obstetric ultrasound, with clinical and technical guidance.
Normal McGregor's Line Measurement: Radiography, CT, MRI
Normal McGregor's line measures less than 4.5 mm above the line, used to assess basilar invagination on lateral cervical imaging.
Normal McMurtry's Translation Index Size on Radiography
Normal McMurtry's Translation Index on PA wrist radiography ranges from 0.27–0.33, serving as a key measure of carpal translocation.
Normal Metacarpophalangeal Joint Space Size on Radiography
Normal metacarpophalangeal joint space measures 1–2 mm on PA and lateral radiographs — a key reference for detecting arthritis and joint disease.
Normal Metaphyseal-Diaphyseal Tibia Angle Size on Radiography
Normal metaphyseal-diaphyseal tibia angle is less than 11° on AP radiography, helping distinguish physiological bowing from pathological tibia vara.
Normal Metatarsophalangeal Angle Size on Radiography
Normal metatarsophalangeal angle values on weight-bearing AP radiography: <15° at the 1st MTP and <10° at the 5th MTP joint.
Normal Metatarsophalangeal Joint Space Size on Radiography
Normal metatarsophalangeal joint space measures 1–2 mm on radiography; values outside this range suggest arthritis, gout, or joint destruction.
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.
Normal Modified Insall-Salvati Ratio Size on Radiography
The normal modified Insall-Salvati ratio is less than 2 on lateral knee radiography, a key measure for detecting patellar height abnormalities.
N
Normal Nattrass's Carpal Height Index Size on Radiography
Normal Nattrass's Index of Carpal Height on PA wrist radiography ranges from 1.52 to 1.62, a key metric for detecting carpal collapse.
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 Neonatal Trachea Diameter on Radiography
Reference values for normal neonatal tracheal diameter on radiography, including AP and lateral measurements at C5, T1, and T3 levels.
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.
Normal Nuchal Thickness Size 18–22 Weeks Ultrasound
Normal fetal nuchal fold thickness measures less than 6 mm on ultrasound between 18–22 weeks; values at or above this threshold raise concern for aneuploidy.
Normal Nuchal Translucency Size on Ultrasound 11–14 Weeks
Normal nuchal translucency measures less than 3 mm on ultrasound between 11–14 weeks, with values above this threshold raising concern for chromosomal abnormalities.
O
Normal Ovarian Vein Diameter on Ultrasound and CT
Normal ovarian vein diameter measures less than 7 mm on ultrasound and CT; values at or above this threshold may indicate pelvic venous insufficiency.
Normal Ovary Volume in Children: Ultrasound Reference
Reference guide for normal pediatric ovarian volume by age group on ultrasound, from neonates through adolescence, with clinical thresholds.
Normal Ovary Volume Size on Ultrasound, CT & MRI
Normal ovarian volume ranges from <20 mL premenopausal to <10 mL postmenopausal; learn thresholds for PCOS and fertility assessment on ultrasound, CT, and MRI.
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 Patellar Nose Size on Radiography and MRI
Learn the normal patellar nose measurements on radiography and MRI, including key thresholds linked to patellar instability and chondral pathology.
Normal Patellar Tilt Angle: Radiography, CT & MRI
Normal patellar tilt angle is 20° on sunrise view; learn measurement technique and clinical significance on radiography, CT, and MRI.
Normal Patellofemoral Index Size on Radiography
The normal patellofemoral index on sunrise radiograph is less than 1.6, a key metric for diagnosing lateral patellar compression syndrome.
Normal Pelvic Lymph Node Size on CT and MRI
Normal inguinal pelvic lymph nodes measure less than 1.5 cm on CT and MRI; exceeding this threshold warrants further clinical evaluation.
Normal Perirectal Lymph Node Size on CT and MRI
Normal perirectal lymph nodes measure less than 5–8 mm on CT and MRI; exceeding this threshold raises concern for malignant involvement.
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 Physiologic Periosteal Reaction Newborn Radiography
Normal physiologic periosteal reaction in newborns measures less than 2 mm on radiography and must be distinguished from pathologic periostitis.
Normal Physiologic Periosteal Reaction Newborn Radiography
Normal physiologic periosteal reaction in newborns measures less than 2 mm on radiography and must be distinguished from pathologic causes.
No references match your filter.