Difference between revisions of "Ultrasound basics"
From Radipedia
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:Proliferative Phase (between the start of menses and ovulation measures) <8mm | :Proliferative Phase (between the start of menses and ovulation measures) <8mm | ||
:Secretory Phase (from ovulation to start of menses) can be 15mm or thicker. | :Secretory Phase (from ovulation to start of menses) can be 15mm or thicker. | ||
| − | :Post menopausal | + | :Post menopausal greater than 5mm if bleeding, greater than 11 mm if asymptomatic warrents biopsy |
| − | :Post menopausal on Tamoxifen less than 8 mm | + | :Post menopausal on Tamoxifen should be less than 8 mm |
'''Uterus''' | '''Uterus''' | ||
Revision as of 16:11, 27 April 2011
Contents
Abdomen
Gallbladder Wall: <3mm
Gallbladder Size: 4cm transverse
Intrahepatic Bile Duct: <2mm
Common Bile Duct
- Normal < 6mm
- Intermediate 6-8mm
- Abnormal > 8mm
- Post cholecystectomy < 10mm
Spleen: <13cm length, <6cm thick
Kidneys: average 11cm (9-13cm)
Liver:
- <17cm sagittal length
- Diffusely Hyperechoic: Fatty liver, Hemochromatosis, fibrosis
- Diffusely Hypoechoic: congestion, acute hepatitis, amyloidosis
Head and Neck
Thyroid Lobes: 4-6cm in length, <2cm in AP or transverse diameter
Thyroid Isthmus: <4mm thick
OB/GYN
Endometrial Stripe
- Includes the uterine canal and two layers of endometrium
- At the end of menses meaures 2-3mm thick
- Proliferative Phase (between the start of menses and ovulation measures) <8mm
- Secretory Phase (from ovulation to start of menses) can be 15mm or thicker.
- Post menopausal greater than 5mm if bleeding, greater than 11 mm if asymptomatic warrents biopsy
- Post menopausal on Tamoxifen should be less than 8 mm
Uterus
- Nulliparous: 7x5x3cm
- Multiparous: (2-3) 9x6x4
Ovaries:
- Premenopausal 18-22 cc
- Postmenopausal: depends on age and hormone status but late menopause < 5cc
Ovarian Follicles
- Less than 2.5-3 cm
- Ovulation occurs when dominant follicle reaches 2.0 cm
Ovarian Cysts
- Persistent simple nonfunctioning cyst less than 5 cm is almost always benign but should be followed to confirm stability
- If the cyst is more than 5 cm and persists, the likelihood of malignancy increases.
Fetus:
- Fetal heart beat should be detected if embryo is >5mm
