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Technical considerations

3D/4D OB Ultrasound: Basics, Tips, and Possibilities Diana M. Strickland, RDMS, RDCS East Carolina University – Brody School of Medicine Greenville, NC. Technical considerations. Surface Rendering:. Optimal Body surfaces Tissue/fluid interfaces Suboptimal Oligohydramnios

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Technical considerations

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  1. 3D/4D OB Ultrasound: Basics, Tips, and Possibilities Diana M. Strickland, RDMS, RDCSEast Carolina University – Brody School of MedicineGreenville, NC

  2. Technical considerations Surface Rendering: • Optimal • Body surfaces • Tissue/fluid interfaces • Suboptimal • Oligohydramnios • Fetal part against uterine wall • Strong Echoes • Bone/ Spine

  3. Measurements • More accurate CRL • Weight volume • Quantify AFV

  4. Artifacts • Some will be unique to 3D • need to recognize • Dropout • may simulate missing limbs • Fetal small parts • Fetal motion

  5. Gynecology • Coronal and transverse vaginal quality images of entire uterus • Septums • Adnexal masses • size, wall structure, internal characteristics, vascularity • Follicles • Fibroids • Endometrial thickness, Sonohysterography

  6. Comparison with 2D Imaging • Multiple views, planes, and angles • Volumetric storage -Better appreciate size • Photographic quality image • Improved patient understanding ADVANTAGES

  7. Slow learning curve Placental interference Obesity Oligohydramnios Small parts interference Fetal motion (20%) Expert sonographer Expense Comparison with 2D Imaging DISADVANTAGES

  8. Clinical Applications • Still not a necessary component for diagnosis (Adjunct) • May Improve Diagnosis • Confirmation of a 2D diagnosis • Helps to re-evaluate after initial diagnosis • Counseling • Help patient to conceptualize diagnosis

  9. 4D or STIC Serial 3D Gated 3D • Dynamic view of beating heart • Fetal movement and behavior * • Placental blood Flow * http://www.ob-ultrasound.net/images/yawn.mov

  10. Transparency Mode X-ray Mode

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