MEDRADSC 3DA3 Lecture Notes - Lecture 5: Virtual Colonoscopy, Paranasal Sinuses, Hysterosalpingography

• School: McMaster University
• Department: Medical Radiation Sciences
• Course: MEDRADSC 3DA3
• Professor: Dwight Mountford

Document Summary

Saturations 95% room air, ecg described as unremarkable. Objectives: uses, technical considerations, virtual bronchoscopy versus fiberoptic, virtual hysterosalpingography, colonography vs colonoscopy. If done with ct: radiation, contrast (if needed- usuall(cid:455) do(cid:374)(cid:859)t(cid:895) Applications of virtual endoscopy: colon**, airways, hysterosalpingography, paranasal sinuses, bladder, spinal canal, cbd and pancreatic duct. Technical considerations: four fundamental requirements, data acquisition. Image pre-processing: function optimize image quality by further processing, applications noise filtering algorithms and image segmentation. Image segmentation can be automatic or semi automatic (structures are defined by technologist) 3d rendering: 2 techniques - ssd & vr are used, vr = superior quality images, gives some density information, v pa(cid:396)tial (cid:448)olu(cid:373)e a(cid:448)e(cid:396)agi(cid:374)g a(cid:396)tifa(cid:272)ts because looking at the whole data set. Image display & analysis: powerful workstation, applications, fly through, controlled by the computer, navigate the 3d anatomical models by using auto flight path programs, split or unfold structures, cad, computer aided detection/diagnosis, panoramic displays. V. e: accessory bronchus- anatomical variant, not necessarily a problem.