7.1 Show that 1u is equivalent to 931 MeV.
1 u = 931 MeV
Rest mass of electron = 511 keV
mp = 1.00726 u
me = 0.000548
Rme 511 keV
1u= 931 M eV
7.5 Consider the problem in Example 7.1 suppose we have 1
BMET Radiology Test
(TCO 1) What is the name of the medical imaging system that uses an emission signal from a
human body to create the image of the organ?
Answer: PET imaging
Explanation: PET images use the radioisotopes injected to the human body that e
4.6 Ultraviolet light is defined as electromagnetic waves having wavelengths in the range of 4-400 nanometers.
(a) Determine the frequency range of ultraviolet light.
(b)Determine the photon energy range of ultraviolet
6.1 A CT calibration experiment measures two Hounsfield numbers: h m =10 for water and
=1100 for air.
(a) Find expressions for a and b so that
b = 0 10
b = -10
3.5 Consider an organ with a tumor in imaged. In the resulting image, the organ has intensity I0, and the
tumor has intensity It > I0. Which of the following methods can improve the local contrast if the organ is
12.1 A non-uniform magnetic field B pointing in the z-direction is applied to a sample of protons. The
field B (in Tesla) varies as a function of z(in cm):
B(z)= 1 + 0.5z.
The magnetization vector M precesses around z-
Homework # 4
10.1 Suppose a steady-state sinusoidal wave with frequency 2-MHz is travel in the +z direction in the bone.
What is the wavelength? c= 4080 m/s in the bone
c 4080 ms1
f 2106 Hz
10.3 Suppose medium 1 is f