Hb Bart's Disease — Use of 3D/4D Ultrasound in the Evaluation of Fetal Anomalies
Citation(s)
Cheong Kah-bik, Ng EHY The use of volumetry by three-dimensional ultrasound in the first trimester. 2009. Postgraduate Thesis. The HKU Scholars Hub (thesis online).
Cheong KB, Leung KY, Chan HY, Chen M, Tang MHY Comparison of volumetry fetus, gestational sac, and placenta obtained from two three- dimensional ultrasound machines. 18th World Congress on Ultrasound in Obstetrics and Gynecology. Ultrasound Obstet Gyneco
Cheong KB, Leung KY, Chan HY, Chen M, Tang MHY Comparison of volumetry of fetus, gestational sac, and placenta in normal pregnancies obtained by two kinds of three dimensional ultrasound machines. 4th Asia Pacific Congress inMaternal Fetal Medicine. 17Th
Cheong KB, Leung KY, Chan HY, Lee YP, Tang MHY Comparison of inter- and intraobserver agreement between three different types of fetal volume measurement techniques (XI VOCALTM, VOCALTM and multiplanar). 13th Postgraduate Symposium, Li Ka Shing Faculty o
Cheong KB, Leung KY, Chan HY, Lee YP, Yang F, Tang MH Comparison of inter- and intraobserver agreement between three types of fetal volume measurement technique (XI VOCAL, VOCAL and multiplanar). Ultrasound Obstet Gynecol. 2009 Mar;33(3):287-94. doi: 10.
Cheong KB, Leung KY, Li TK, Chan HY, Lee YP, Tang HY Comparison of inter- and intraobserver agreement between three different types of placental volume measurement techniques (XI VOCALTM, VOCALTM and multiplanar). 13rd -17th Sept 2009. Ultrasound Obstet
Cheong KB, Leung KY, Li TK, Chan HY, Lee YP, Tang MH Comparison of inter- and intraobserver agreement and reliability between three different types of placental volume measurement technique (XI VOCAL, VOCAL and multiplanar) and validity in the in-vitro s
KB Cheong, KY Leung, HY Chan, YP Lee, F Yang, MHY Tang Comparison of inter- and intra-observer agreement between three different types of fetal volume measurement techniques (XI VOCAL, VOCAL, and multiplanar). 18th World Congress on Ultrasound in Obstetr
KY Leung, KB Cheong, MHY Tang 2D and 3D Ultrasound Prediction of Homozygous aº-thalassemia. Donald School Journal of Ultrasound in Obstetrics and Gynecology, April-June 2010;4(2):123-126.
Leung KY, Cheong KB, Lee CP, Chan V, Lam YH, Tang M Ultrasonographic prediction of homozygous alpha0-thalassemia using placental thickness, fetal cardiothoracic ratio and middle cerebral artery Doppler: alone or in combination? Ultrasound Obstet Gynecol. 2010 Feb;35(2):149-54. doi: 10.1002/uog.7443.
Interventional studies are often prospective and are specifically tailored to evaluate direct impacts of treatment or preventive measures on disease.
Observational studies are often retrospective and are used to assess potential causation in exposure-outcome relationships and therefore influence preventive methods.
Expanded access is a means by which manufacturers make investigational new drugs available, under certain circumstances, to treat a patient(s) with a serious disease or condition who cannot participate in a controlled clinical trial.
Clinical trials are conducted in a series of steps, called phases - each phase is designed to answer a separate research question.
Phase 1: Researchers test a new drug or treatment in a small group of people for the first time to evaluate its safety, determine a safe dosage range, and identify side effects.
Phase 2: The drug or treatment is given to a larger group of people to see if it is effective and to further evaluate its safety.
Phase 3: The drug or treatment is given to large groups of people to confirm its effectiveness, monitor side effects, compare it to commonly used treatments, and collect information that will allow the drug or treatment to be used safely.
Phase 4: Studies are done after the drug or treatment has been marketed to gather information on the drug's effect in various populations and any side effects associated with long-term use.
