1) If an arm of a patient is to be imaged with a narrow beam of X-ray with 10000 photons at 100 keV. The total thickness of the arm is 8 cm with the bone thickness to be 3 cm and the muscle thickness 5 cm. Assuming HVL values of muscle and bone are 2.5 and 1 cm at 100 keV, respectively. How many photons are absorbed by the arm?
Q: A narrow beam of 0.5 MeV photons is incident normally on a 3 mm iron slab. What fraction of the…
A: Given data: The energy of the photon is E=0.5 MeV. The thickness of the slab is t=3 mm. The mass…
Q: X-rays are generated in a classic tube television, which has a voltage of 30 kW applied to its…
A: Which two fundamentally different processes mainly cause this X-ray radiation? Which of the two…
Q: Explain single-photon-emission computed tomography(SPECT).
A: Given: An explanation of the SPECT is given as,
Q: proton and nucleus
A:
Q: X rays are generated by accelerating electrons through a large potential difference AV and allowing…
A: Given:target used is tungsten, hence its atomic number, Z = 74the potential difference, ΔV = 60 kV =…
Q: What fraction of 5-MeV - particles will be scattered through angles greater than 8° from a gold foil…
A: Given: The value of gold foil is Z = 79, density=19.3 g/cm3
Q: 8. The quantum noise in x-ray imaging obeys Poisson distribution: NK e-N PK K! where: P is…
A: We have given the probability in possion distribution for X ray imaging. We want to calculate the…
Q: Consider a 1 kg mass of material exposed to the photons described below. Write down the energy…
A: Given data: The mass of the material is m=1 kg. Part (a) The energy of the incident photon is…
Q: Suppose the range for 5.0 MeVαray is known to be 2.0 mm in a certain material. Does this mean that…
A: Radiation is the given off energy in the form of high-speed particles or rays. The large unstable…
Q: For 140 keV gamma rays, the mass attenuation coefficients for hydrogen and oxygen are 0.26 and 0.14…
A: Given: For 140 keV gamma rays, The mass attenuation coefficients for hydrogen and oxygen are 0.26…
Q: During the deep X-ray therapy high energy X-rays are used. They are filtered by passing them through…
A:
Q: Typical 10-fold intensity reduction values for X-ray radiation with energy 1 MeV are 30 cm for bone…
A:
Q: The half-value layer for Tc-99m photons in water is 4.6 cm. Since soft tissue has about the same…
A: Given Data: Half value layer =4.6cm To Find: What percent of the beam passes through 3cm of fat.
Q: In a dental office, the person giving a dental x-ray examination leaves the room while the x-ray…
A: Because x-ray photons carry much more energy than the photons of visible light.
Q: At around 150keV, If you know that the mass attenuation coefficient of lead is around 4 cm2 /g, and…
A: Given,Mass attenuation coefficient of lead = 4 cm2 gThe density of lead, ρ=11.34 gcm3a) The half…
Q: Determine the time in seconds required to sputter 50 nm of Si using a 10 µA/cm2 beam of 45 keV ions…
A: The sputtering process involves the removal of atoms from a target material's surface due to the…
Q: energy of the photopeak falling at channel 3345?
A: From the relationship given above Energy = a* channel + constant.... E2 = 1332 keV E1 = 1172 keV…
Q: 8. 5 HVLS will decrease the radiation intensity to what percentage of the original?
A:
Q: Typical 10-fold intensity reduction values for X-ray radiation with energy 1 MeV are 30 cm for bone…
A:
Q: The four particles shown below are connected by rigid rods of negligible mass where y, = 6.30 m. The…
A: Given data: Length of rectangle, l=4 m. Breadth of rectangle, b=6.3 m. Angular speed, ω=5.5 rad/s.…
Q: For the intensity of a monochromatic beam of gamma rays to be reduced to 30% of its initial value,…
A:
Q: Gamma ray that has an energy of 662 MeV incidents on a mass of lead and the penetrating energy of…
A: The energy of the gamma ray is 662 MeV. The energy of lead is 640 MeV.
Q: The linear absorption coefficients for 0.05-nm x-rays in lead and in iron are, respectively, 5.8 ×…
A: When high-energy beams like x-rays go through the material there will be a reduction of intensity…
Q: Two photopeaks due to two g-rays of energies 1172 keV and 1332 keV of 60Co falls on channels 2871…
A: Given: Two g rays of energies 1172keV and 1332keV of 60CO Channels 2871 and 3264
Q: (a) What voltage must be applied to an X-ray tube to obtain 0.0100-fm-wavelength X-rays for use in…
A: The energy of the X-ray can be given using the following equations Substituting the values give,
Q: (a) Calculate the Ngas (Gy/C) for the chamber. (b) Calculate the absorbed dose (Gy) in Perspex at…
A: (a) To calculate the Ngas (Gy/C) for the particle chamber, we will use the subsequent formula: Ngas…
Q: A patient is being given a chest X-ray. The X-ray beam is turned on for 0.20 s, and its intensity is…
A: Intensity is defined as energy per unit area per unit time. I=EAt
Q: Lead aprons are the primary radiation protective garments used by personnel during fluoroscopy. An…
A:
Q: Compton scattering occurs for 0.662 MeV gamma rays. If a photon is dispersed at an angle of 60.0…
A: Here is the explaination in the given image
Q: The linear absorption coefficient of 1 MeV X-rays in water is 7.06 m-1. How many times will the…
A: As beam passes through a medium its attenuation is given by, I = I0 e-µxWhere: I = the intensity of…
Q: a) If the intervening tissue has a thickness of 5 mm, calculate the fraction of the 20- keV…
A: Given: A dentist places the window of a 100 kVp (100-kV , peak voltage ) The inverting tissue has a…
Q: What are some important practical differences that you have observed between spectroscopies of…
A: Gamma rays: The Gamma rays are uncharged waves and they interact with matter in three different…
Q: (d) volume (e) Show that the total number of photons per unit at temperature Tis kT N' = 8π hc.…
A:
Q: Nuclear radii may be measured by scattering high-energy electrons from nuclei. (a) What is the de…
A:
Q: The radionuclide Tc-99m is a gamma photon emitter. The emitted gamma photon energy is 141 keV. The…
A: Given: wavelength of each visible photon = λ = 550 nm energy of emitted gamma photon = Eg = 141 keV…
Q: Čalculate the density of a material if the number of gamma from 5206 to 2210 after passing through…
A: Given: The number of gamma photons initially is 5206. The number of gamma photons finally are 2210.…
1) If an arm of a patient is to be imaged with a narrow beam of X-ray with 10000 photons at 100 keV. The total thickness of the arm is 8 cm with the bone thickness to be 3 cm and the muscle thickness 5 cm. Assuming HVL values of muscle and bone are 2.5 and 1 cm at 100 keV, respectively. How many photons are absorbed by the arm?
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
- H IS mear atenualion coeiciem (17m). PROBLEMS 1. Find maximum frequency and minimum wavelength of X-ray radiation, if the potential difference between cathode and anode was (a) Ual = 3 kV and Ua2 = 15 kV. 2 The 10-fold X-rav reduction values for (a) water (h).concreate (c) iron and (d) lead are equalPROBLEM: The lifetime of a nucleus in an excited state is 10-12²s. Calculate the probable uncertainty in the energy and frequency of a y-ray photon emitted by it.5. An XPS with an instrument work function of 4.5eV was used to analyze a surface. An observed kinetic energy of 795.2 eV was observed when a(n) MgKα (1253.6 eV) X-ray source was used. What was the binding energy of the electron coming from this surface?
- Typical 10-fold intensity reduction values for X-ray radiation with energy 1 MeV are 30 cm for bone tissue, 100 cm for muscle tissue. Find mass and linear attenuation coefficients if densities are 1.85 g/cm3, 0.994g/cm3, respectively. can you use the formulas from the pictures please ? thank you1 For the Rutherford (Geiger and Marsden) experiment with 5.5 MeV alpha particles on a 1 um gold foil, and for the six angles (decades) between 10-5 and 10° rad, calculate the Rutherford differential cross section (DCS), dor/d2, (a) without and (b) with screening. Represent both results graphically and draw conclusions. Answer: The nonscreened DCS values vary between 1.7137x10-3 and 2.0273×10 23 cm? rad-' in the interval [10-5-1 rad]. The screening angle is 3.7 x 10-3 rad, and the corresponding screened DCS values vary between 9.3620 x 10-14 and 2.0273 x 10-23 cm² rad-'. The screening Xa cuts off the otherwise increasing DCS with decreasing angle, which remains practically constant below XIf an average of 10000 photons are detected per mm2 the probability of detecting between 9800 and 10200 counts in any exposed mm2 is approximately: a) 59 b) 75 c) 89 d) 95 e) 99
- The speed of the alpha particles in Rutherford experiment was 0.01c, the scattering material was gold. What was the impact parameter of the alpha particle scattered by 60°?Applying x-rays for diagnosis or therapy requires a good understanding of the effects the radiation causes in biological tissue. A lead apron that would stop 3⁄4 of the radiation would already provide passable protection. Find thickness of the apron, if lead mass attenuation coefficient for a radiationsource with an energy of 140 keV is μm = 2.32 cm2/g. Density of lead ρ = 11.35 g/cm3Compare the wavelength of 1.0-MeV gamma-ray photon with that of a neutron having the same kinetic energy. (for a neutron, mc² = 939 MeV)