PSYC 1000 Lecture Notes - Lecture 9: Magnetic Resonance Imaging, Diffusion Mri, Positron Emission Tomography

• School: Memorial University
• Department: Psychology
• Course: PSYC 1000
• Professor: Elizabeth Russell

Document Summary

Neuroimaging (ct, mri, fmri, pet, dti: structural imaging: provides picture of brain only (not activity, functional imaging: reveals areas of brain activity. Used to see if parts of the (cid:271)rai(cid:374) are(cid:374)"t (cid:449)orki(cid:374)g. Used to see what areas of the brain are active during certain tasks: computerized axial tomography (ct): Series of x-rays fused together to form a 3d image. Used best for hard objects like bones. Not so good for observing the brain but is good for finding tumours. Detailed (cid:454) ra(cid:455) i(cid:373)aged fro(cid:373) (cid:373)ultiple a(cid:374)gles (cid:894)(cid:862)a(cid:454)ial(cid:863)(cid:895) Used in to visualize sizable abnormalities: magnetic resonance imaging (mri): Lines up all the atoms in the brain and when magnet is released, they fling back and release energy which can be detected to determine how much mass is there and can determine a 3d image from this. Uses strong magnetic fields and radio waves. Provides structural image of soft brain tissue. Can also see an outline of the brain: diffusion tensor imaging.