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Nuclear medicine imagining devices :Imagining ,or producing pictures of the distribution of the radioactivity is the most important aspect of nuclear medicine.
Rectilinear scanner-It use a NaI(Tl) detectors.-Two images are made of the radiation distribution -It use a focused collimators-A few scanners have two detectors focusing each other.
Gamma camera- It produces an image while stationary.- It has a large NaI(Tl) scintillation crystal about 1 cm thick and 30 to 45 cm in diameter.- The scintillation are viewed through a light pipe by an array of 19 or 37 PTMs.- A computer can be used in conjunction with gamma camera to obtain quantitive information.- A parallel hole collimator is usually used with gamma camera
A car is moving along a straight horizontal road at a speed of 20 meters per second. The brakes are applied and a constant force of 5000 Newtons decelerates the car to a stop in 1
Can an ordinary diode be used as a zener diode? Justify your answer. Ans Ordinary diode can't be used as a Zener diode, since ordinary diodes aren't operated in the rever
laws of successive disintegration
#question.An experminet to prove that a substance is ferrmoanetic
Q. What is a frame of reference? A system of co-ordinate axes which describe the position of a particle in two or three dimensional space is called a frame of reference.
A wooden ring stand The bottom for this ring stand is made from a piece of wood 40 cm long, 15 cm wide and 1 cm thick. A whole 1 cm in diameter is bored by the centre of the ba
Can several fibers gives the same amount of light? No, some fibers do not give similar amount of light. If a no. of fibers or light guides are coupled similar illuminator, this
The phase of weightlessness may be observed in the following situations: (i) When objects fall freely under gravity : For example, a lift goes down freely, or an airship showing
what is torsion of cylinder ?
find the number of electric lines of force that radiate outwards from one coulomb charge in vaccum
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