Consider the schematic view (figure below) of a profile in depth of a head scann
ID: 1644747 • Letter: C
Question
Consider the schematic view (figure below) of a profile in depth of a head scanned with ultrasound imaging. The structures are successively skin, bone, brain and bone again, characterized by impedances Z1, Z2, and Z3 (=1.12*106, 7.8*106 and 1.09*106 rayls respectively). Consider that the transducer is in close contact with the skin and neglect absorption as well as signal coming from multiple reflections.
What is the portion of signal coming back from the brain (i.e. from the second brain/bone interface) to the transducer?
What do you conclude on the efficiency of ultrasound imaging for brain studies?
In practice, gel is always spread between the transducer and the skin. Explain why.
Z3 2 2 Skin Bone Brain BoneExplanation / Answer
What is the portion of signal coming back from the brain (i.e. from the second brain/bone interface) to the transducer?
Brain signals generate electro magnetic fields & can be captured by different kind of coils designed & wrapped in the lab by the Lab people.Understanding these signals, enters you in a new world where all kind of incurable diseases become transparent & find immediate cure with no danger & side effect.
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What do you conclude on the efficiency of ultrasound imaging for brain studies?
Exciting advances in anatomical imaging have greatly improved our capacity to detect pathologic processes in the nervous system, localize these processes precisely, and predict the type of disease more accurately than ever before .These advances, coupled with new and emerging therapies for previously untreatable diseases, have expedited the evaluation of patients with neurologic disorders and permitted the rapid initiation of therapy.
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In practice, gel is always spread between the transducer and the skin. Explain why.?
Ultrasound gel is a type of conductive medium which makes a strong bond between the skin and the probe or transducer, which allows the waves to travel directly to the tissues beneath and to the parts that need to be imaged. It is formulated to act as a coupling agent and reduce static.