Radiology Notes

My notes during radiology residency, fellowship, and beyond…

Archive for the ‘ultrasound’ Category

Cord Insertion Types

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Required element in a complete >14wk OB ultrasound report.

Cord Insertion types: central, eccentric, marginal, and velamentous

Nice youtube video for ultrasound images.

Written by lmwong

May 16, 2013 at 11:05 am

Posted in OB, ultrasound

Vascular Anomalies, ISSVA Classification

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2 categories: vascular tumors or vascular malformations. Distinction determines therapy.

Vascular Tumors

  • infantile hemangiomas: grow rapidly after birth, GLUT1+
  • congenital hemangiomas (RICH and NICH): fully mature at birth, GLUT1-
  • Tufted angioma
  • Kaposiform hemangioendothelioma
  • Spindle cell hemangioendotheliomas
  • Dermatologic acquired vascular tumors

Vascular malformations (slow)

  • capillary malformation (port-wine stain, telangiectasia, angiokeratoma)
  • venous malformation
  • lymphatic malformation

Vascular malformations (fast)

  • arterial malformation
  • arteriovenous fistula
  • arteriovenous malformation

PDF link

Written by lmwong

April 23, 2012 at 12:57 pm

Ultrasound Landmarks for Early Pregnancy Failure

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Written by lmwong

March 6, 2011 at 7:45 am

Posted in OB, ultrasound

Beta-HCG levels and Gestational Age

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Discrim. Zone = 1500

3 weeks LMP: 5 – 50 mIU/ml
4 weeks LMP: 5 – 426 mIU/ml
5 weeks LMP: 18 – 7,340 mIU/ml
6 weeks LMP: 1,080 – 56,500 mIU/ml
7 – 8 weeks LMP: 7, 650 – 229,000 mIU/ml
9 – 12 weeks LMP: 25,700 – 288,000 mIU/ml
13 – 16 weeks LMP: 13,300 – 254,000 mIU/ml
17 – 24 weeks LMP: 4,060 – 165,400 mIU/ml
25 – 40 weeks LMP: 3,640 – 117,000 mIU/ml
Non-pregnant females: <5.0 mIU/ml
Postmenopausal females: <9.5 mIU/ml

 

Written by lmwong

December 11, 2010 at 5:04 pm

Posted in OB, ultrasound

Congenital Diaphragmatic Hernia

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  • MC is Bochdalek hernia
  • MC left side
  • diagnosed at prenatal US, follow with MRI
  • up to 50% mortality
  • 50% have CHD
  • most have malrotation

read more

Written by lmwong

January 30, 2010 at 9:47 am

Decreased renal echogenicity

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  • Acute pyelonephritis
  • Renal vein thrombosis
  • Acute glomerulonephritis
  • Lupus nephritis
  • Lymphoma

Written by lmwong

January 22, 2010 at 1:46 am

Increased renal echogenicity

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Cortical only:

  • Acute/Chronic Glomerulonephritis
  • Nephrosclerosis
  • Acute tubular necrosis

Medullary only:

  • Medullary nephrocalcinosis
  • Renal pyramidal fibrosis

Cortical and Medullary:

  • Chronic Plyeonephritis
  • Chronic Glomerulonephritis

Patchy:

  • Infection
  • Scarring
  • Renal Vein thrombosis

Written by lmwong

January 22, 2010 at 1:44 am

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