Sonographic evaluation in the first trimester of pregnancy almost always is performed using the transvaginal approach. The increased resolution afforded by this technique has made it possible to detect early embryologic events that can cause problems in interpretation by the general radiologist. To ...
Because of the two best recognized biological effects of ultrasound (thermal and non-thermal), two indices were introduced to allow the clinical end-user an assessment of the risk: the thermal index, or TI and the mechanical index, or MI. Usage of ultrasound in the first trimester, a time...
The most significant advancement in first trimester ultrasound screening has been the recognition of nuchal translucency (NT) as a potent marker for fetal aneuploidy. NT test is the most effective prenatal screening test to identify those at risk for trisomy 21. If NT levels increase above the ...
2017-12-18 20:39:5989:5877 所属专辑:RSNA 2012-2017 音频列表 1 2015 Essentials of Cardiac Imaging_纯音频文件_纯音频输出 36 2017-12 2 2015 First Trimester Ultrasound (An Interactive Session)_纯音频文件_纯音频输出 77 2017-12 3 2015 Hot Topic Session - 4D Flow Cardiac MRI_纯音频文件_纯音...
ULTRASOUND IN THE FIRST TRIMESTER 4 INTRODUCTION First trimester ultrasound is often done to assess pregnancy location and thus it overlaps between an obstetric and gynecologic ultrasound examination. Accurate performance of an ultrasound examination in the first trimester is important given its ability to...
OBJECTIVE To explore the role of early first trimester ultrasound at 5-7 postmenstrual weeks of gestation in predicting sonographic staging of placenta accreta spectrum (PAS) and to elucidate whether integrating first trimester assessment with ultrasound staging of PAS can predict surgical outcome in wom...
Obstetric Ultrasound CourtneyWoodfieldMD,Beverly G.ColemanMD, inRadiology Secrets Plus (Third Edition), 2011 2What are the indications for first-trimester US? First-trimester US is performed when the pregnancy is high risk (e.g., pregnant byin vitro fertilizationorovulation induction, advancedmaterna...
First Trimester Screening Also Known As: Pregnancy-associated plasma protein-A (PAPP-A) with hCG, total or free beta subunit and nuchal translucency ultrasound Board Approved At a Glance Why Get Tested? For pregnant women, to assess the risk of your baby having a chromosome disorder, such as...
Peter M. Doubilet, MD, PhD, from Brigham and Women's Hospital and Harvard Medical School in Boston, Massachusetts, and the other 14 members of the Society of Radiologists in Ultrasound Multispecialty Panel on Early First Trimester Diagnosis of Miscarriage and Exclusion of a Viable Intrauterine Pre...
(1990) First trimester selective reduction in multiple pregnancy guided by transvaginal sonography. J. Clin. Ultrasound, 18, 323-327.Itskovitz, J., Boldes, R., Thaler, I., et al. First trimester se lective reduction in multiple pregnancy guided by transvaginal sonography. J Clin Ultrasound...