RIU 320 Lecture Notes - Lecture 44: Image Resolution, Grafting, Sound Energy

• School: GVSU
• Department: Radiation and Imaging - Ultrasound
• Course: RIU 320
• Professor: Angela Malone

Document Summary

Slice thickness or elevational resolution: resolution is accuracy in imaging. Which transducer types have the best elevational resolution: active elements that are disc shaped provide the thinnest ultrasound slices and the best elevational resolution within the focal zone. Disc-shaped crystals are found in mechanical and annular phased array transducers: with disc shaped crystals, the cross section of a sound beam is a circle. The width of the circle in one direction indicates the beam diameter (determining lateral resolution) , and the height of the circle indicates the beam thickness (determining elevational resolution). The elevational resolution is identical to the lateral resolution with disc-shaped active elements. 3: what determines elevational resolution in phased array, these array probes have rectangular shaped active linear array, and convex array transducers? elements placed side by side. With phasing, the beam is focused or narrowed only side to side in the imaging plane, but not above and below.