Lumbar Spine - Basic projections include an AP, two Obliques, a Lateral, and a Lateral L5-S1 spot to better visualize the L5-S1 interspace.

Through the spot test, the paper studies the forced mechanism of soil anchor bolting and lateral displacement of the foundation pit.

But now the solid focused laser spot is commonly used in this technology, and the type of material feeding is the lateral material feeding or coaxial material feeding outside the laser.