NT scan is an antenatal ultrasound which is advised for early screening of the baby to look for risk of trisomies (a type of genetic abnormality). It is performed between 11-13.6 weeks gestation age. Few anomalies may also show up at this early gestation.
It aims at evaluation of fluid collection at the nape of neck of the baby. However this must be done keeping in mind the strict guidelines because the risk estimation is not valid if the guidelines are not followed. Additional markers (NB, DV, TR) should also be looked for to increase the detection rate and reduce false positive rates of the test.
The test must be combined with a blood test (Dual marker test) which further increases the detection rate of trisomies.
It is estimated that combining NT scan with Dual marker, may increase the detection rate above 95% and reduce false positive rate below 3%.
Note: NT scan is a screening test and not a diagnostic test.
Copyrights © ShiviRadiology. All rights reserved.
Dr Ayush Goel
Subscribe To This Blog
The information on this BLOG is not intended or implied to be a substitute for professional medical advice, diagnosis or treatment. All content, including text, graphics, images and information, contained on or available through this blog is for medical education and enlightenment only.
While the goal of this blog is to provide complete, correct and accurate information, none of the authors/contributors can be made responsible for any incompleteness, incorrectness and inaccuracy.
If you are a patient, please see your doctor for evaluation of your individual case. Under no circumstances will the authors be liable to you for any direct or indirect damages arising in connecting with the use of this blog.