medical imaging Flashcards
X-ray
structural creates a 2D image using radiation
idenitfy dense/ hollow structures and able to understand fractures
computed tomography CT scan
multiple x ray create a 3D image
structural
measure the relative tissue type
CT Scan White
metal/bone
CT Scan black
CSF/ AIR
CT scan dark grey
fat/ white matter
CT scan light grey
grey matter
ADV of CT
inexpensive
quick
depicts fratures/ bone abnomralities
intracranial haemorraghe
DIS ADV of CT
not good for fine tissue detail/ radiation exsposure
magnetic ressonance imagery MRI process
magnetic field cause hydrogen protons to allign
radiofrequency waves pulsed to tissue cause the protons to change allignment
creat an extrememly detailed image
MRI is good for
soft tissue/ tumours/ MS/ inflammation
MRI is not ideal for
acute haemorraghe
metal implants
claustrophobic
diffusion tensor imaging
measures how water diffuses around axon
shows the effects of a stroke
cerebral angiography
3D reconstruction of blood vessels
use radio opaque contrast
can see stenosis/ aneurysm
functional imagery
task is performed during image process
functional MRI
detect changes in blood flow and O2 in the brain
Positional emmision tomography
injection of radiotopic isotope attracted to brain area with high metabolisim
Electroencephalic graphy
details record electrical actiity of brin
MEG
identifies functional areas of the brain
