getCTRate is an iPhone app to measure easily by an Xray photo.
It can make your business more efficient, so you don't have to use a ruler for each measurement.
1. Push the camera button in the upper left corner to capture an Xray photo into your iPhone.
2. Put the green line on the transverse diameter of the thorax by your finger, then slide the red line and put it on the transverse diameter of the heart.
3. Read the measurement result indicated in the upper right corner.
- iPod Touch