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Physical principle of nuclear medicine imagining:Since the gamma camera obtain the image in less time, it is usually preferred over the rectilinear scanner
Thyroid imagining:
-About 4MBq of 131I is given orally the body the day before scan, or we can use 99mTcO4 which is taken by the same tissues that take up iodine.-Tc is preferred since it gives a much smaller radiation dose to the patient.-123I it lack of beta emission is also used
Liver:- Normal liver tissue will filter radioactive submicroscopic particles from the blood ,while the tumor in the liver will not and appear on the scan as an area of reduced radioactivity.- For liver scan ,200 Mq of 99m Tc –labeled sulfur colloid with particles about 0.5 µm in diameter is injected into a vein and image is obtained after 10 min.
Brain Tumor:- When injected into the blood ,different radioactive material are taken up bitterly by brain tumors than by surrounding normal brain tissue.- About 500MBq of 99mTc is given ,after 2 hour four gamma camera images (the front ,back ,left and right sides of head) are taken
Illustrate the current-voltage (I-V) characteristic curves if a junction diode in reverse and forward bias.
Electrical equipment in an office takes a current of 13A from a 240V supply. Estimate the cost per week of electricity if the equipment is used for 30 hours every week and 1kW
What makes a flashlight suddenly become dim or bright when you shake it?
example of problem solution of vector quantity
When the two junctions of a thermo couple are maintained at dissimilar temperatures, then a light begins going through the loop called as thermo electric current.
Let's say I have a pinball (solid sphere) with a given mass and radius, and it is held back at a certain distance from equilibrium on a spring. The spring constant k is given, and
Assignment Procedure
Derive the relation Relationship between α and β: Beta factor (β) is the current gain factor of a common emitter circuit is defined as ratio of change in coll
Q. Write the equation of a 25 cycle current sine wave having rms value of 30 A. Data: ν = 25 Hz, Irms = 30 A Solution: i = I o sin ωt =
The conductive method Heat can be transferred by conduction from warmer to cooler objects, the quantity of heat transfer depends on the temperature difference between the two
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