Quality improvements for radiology measurements for Antenatal screening for Down syndrome and other conditions

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The NSU is working with the radiology sector on making improvements on the measurements of nuchal translucency (NT) and crown rump length (CRL) that are provided for first trimester combined screening for Antenatal screening for Down syndrome and other conditions.

Accurate nuchal translucency (NT) and crown rump length (CRL) ultrasound measurements are essential for high quality risk results for women who choose to participate in antenatal screening for these conditions.

To support best practice, the NSU is providing information to radiology practices, radiologists and NT practitioners on the quality of NT and CRL measurements. This is starting with measurements performed during the January to December 2014 period. This feedback has been endorsed by the New Zealand branches of the Royal New Zealand and Australian College of Radiologists (RANZCR) and Australasian Society for Ultrasound in Medicine (ASUM).  

As part of this feedback the NSU has produced guidance and a best practice video to help support improvement. The Guidelines for nuchal translucency (NT) and crown rump length (CRL) measurement is available to download from this site.

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Page last updated: 15 May 2017