QUIZ ULE P2 Flashcards
Ultrasound was introduced when?
1956
When was CT scan introduced? who are the proponents!
1970, Godfrey Hounsfield and Alan Cormack
Doughnut shape is called? in a CT scan
Gantry
Why are shorter wavelengths better in ultrasound? higher ultrasound frequencies have shorter wavelengths because!
because shorter wavelengths provide detail and spatial resolution, shorter wavelengths are also easier to be absorbed and attenuate
2.5 mHz is? 3.5? 15? and medical ultrasound is ranging from?
2.5 mHz is for deep abdomen, makakapal, obstetric or gynecological
3.5 mHz is for deep abdomen, deep pelvic
15 mHz is for superficial structures, nearer to the surface of the skin, musculoskeletal imaging
general medical ultrasound is 2-15 MHz
2.5 mHz is for deep abdomen, makakapal, obstetric or gynecological
3.5 mHz is for deep abdomen, deep pelvic
15 mHz is for superficial structures, nearer to the surface of the skin, musculoskeletal imaging
2,5
3.5
15
MRI was introduced? who were the three proponents?
1970’s, Dr raymond damadian, dr peter mansfield, dr paul lauterbur
the magnets of MRI is almost 1000x stronger than the magnetic field of earth which is 25-65 micro tesla, mri machine uses?
1.5-3 tesla
where is SPECT used?
for physiologic functions, specifically cardiology, neurology and bone scans
what is the radiopharmaceutical used for SPECT usually? and used for PET
Technicium 99, Iodine 123 and Gallium 67, Fluorodeoxyglucose 18
In SPECT what is the specific like thing test used for cardiology
myocardial perfusion imaging
PET is for?
Oncology
Limit c ray beam to a specific field size
collimator
shades of black in a radiographic image
density
misrepresentation of size or shape of an object in a film
Distortion
