1. what is the appearance of dense and sparse tissue and why?
white is dense and dark is less dense. denser structures absorb more X-rays and so less energy is passed to receptors.
white is dense and dark is less dense. denser structures absorb more X-rays and so less energy is passed to receptors. images are often inverted.
white is less dense and dark is dense. denser structures absorb more X-rays and so less energy is passed to receptors.
white is less dense and dark is dense. denser structures absorb more X-rays and so less energy is passed to receptors. images are often inverted.
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2. nuclear medicine or radionuclide imaging uses:
X-rays upto 150kup
ionising radiation as gamma rays
non-ionising radiation (high frequency sound waves)
magnetic and sound waves
ionising radiation upto 150kup
ionising radiation between 55-150kup
3. magnetic resonance imaging uses:
non-ionising radiation (high frequency sound waves)
ionising radiation between 55-150kup
magnetic and sound waves
X-rays upto 150kup
ionising radiation upto 150kup
ionising radiation as gamma rays
4. what is shown in MRI
function and physiology of tissues
multiplanar images with good soft tissue display
real time moving images of bony structures and contrast soft tissue
bones and joints and some soft tissue
coronal image of soft tissue - can have colour overlay
cross sectional images of bone and soft tissue
5. how are X- rays produced
applying heat to a filament, which cause it to emit electrons into a target. An electrical current accelerates them, and they generate X-rays which diverge
applying electrical current to a filament, which heats it causing it to emit electrons into a focusing cup. A PD accelerates them, to towards a target, where they generate X-rays which converge
applying heat to a filament, which cause it to emit electrons into a focusing cup. An electrical current accelerates them, to towards a target, where they generate X-rays which converge
applying heat to a filament, which cause it to emit electrons into a target. An electrical current accelerates them, and they generate X-rays which converge
applying electrical current to a filament, which heats it causing it to emit electrons into a focusing cup. A PD accelerates them, to towards a target, where they generate X-rays which diverge
applying heat to a filament, which cause it to emit electrons into a focusing cup. An electrical current accelerates them, to towards a target, where they generate X-rays which diverge
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