S-Scan
Sector (or sectoral) Scan
S-Scan refers to a Sector (or sectoral) Scan which is produced when a phased array is used to electronically sweep an ultrasonic beam through a range of angles. The data collected is displayed as a B-scan image which shows the angular segment covered by the beam. See image.
![](/Images/What the Hec/0907 Hec S-scan.jpg)
The probe generally stays in one place as the beam is scanned and the index point moves along the shoe as the angle is increased.
The S-Scan is a particularly powerful tool when the available surface for scanning is limited, allowing the inspection volume to be covered with the sound beam.
For more information on S-scan see:
'Resolving capabilities of phased array sectorial scans (S-Scans) on diffracted tip signals', by J M Davis and M Moles, Insight Vol 48 No 4, pp 233-239, April 2006.
What the hec?! articles are not intended to be the definitive account on the topic or acronym in question. Readers’ comments and contributions are welcomed. Email: ndtnews@bindt.org
![](/Images/What the Hec/0907 Hec S-scan.jpg)
The probe generally stays in one place as the beam is scanned and the index point moves along the shoe as the angle is increased.
The S-Scan is a particularly powerful tool when the available surface for scanning is limited, allowing the inspection volume to be covered with the sound beam.
For more information on S-scan see:
'Resolving capabilities of phased array sectorial scans (S-Scans) on diffracted tip signals', by J M Davis and M Moles, Insight Vol 48 No 4, pp 233-239, April 2006.
What the hec?! articles are not intended to be the definitive account on the topic or acronym in question. Readers’ comments and contributions are welcomed. Email: ndtnews@bindt.org