1. atomic nuclei emit which of the following particles as? Decay:
A.4He nucleus
B.Electrons
C.Positrons
D.Photons (electromagnetic radiation)
2. The atomic nucleus radiates which of the following particles is? -decay:
A.4He nucleus
B.electron
C.positron
D.photon(electromagnetic radiation)
3. The atomic nucleus radiates which of the following particles as ? + decay:
A.4He nucleus
B.electron
C.positron
D.photon(electromagnetic radiation)
4. The atomic nucleus radiates which of the following particles as? Decay:
A.4He nucleus
B.Electron
C.Positron
D.Photon(electromagnetic radiation)
5. Which of the following is not a normal X-ray manifestation of a long tubular bone:
A.Periosteum
B.Bone Cortex
C.Bone Puffy
D.Bone Marrow cavity<
E. Fracture line
6. Which of the following is not an imaging manifestation of a skeletal abnormality:
A. Osteoporosis
B. Bone softening
C. Bone destruction
D. Uniform and consistent density of the bone cortex
E. Calcification of cartilage
Reference Answer and Explanation<
1. Reference Answer A. Explanation: When decaying, it radiates ? The decay in which the atomic number decreases by 2 and the mass number decreases by 4 is called ? The products of this decay are helium nuclei. The product of this decay is the helium nucleus.
2. Reference answer B. Explanation: Due to the excessive number of neutrons in the nucleus, neutrons, protons, the number of unbalanced, by the conversion of neutrons into protons at the same time by the nucleus radiates ? -ray process, the nuclide mass number remains unchanged and the atomic number increases by 1. ? -decay products are electrons.
3. Reference answer C. Analysis: Because the number of protons in the nucleus is too large, the number of protons and neutrons is not balanced, by the conversion of protons into neutrons at the same time by the nucleus radiates ? + rays of the process, the mass number of the nuclide remains unchanged, the atomic number decreases by 1. The positron is the ? + decay products.
4. Reference answer D. Explanation: It is an energy jump. Radionuclide nucleus from the excited state to the ground state or from the high-energy state to the low-energy state when the leap, the release of ? The process of decay of rays is called ? decay, also known as ? The process of decay, also known as "decay", is also known as "jumping". Decay is often the result of the nucleus releasing excess energy in the form of ? -ray release of excess energy.
5. Refer to Answer E. Explanation: Long tubular bone is normally visualized on X-ray as: periosteum, cortex, cancellous bone, and marrow cavity. The fracture line is the imaging hallmark of a fracture.
6. Answer D. Explanation: Uniform density of the bone cortex is a normal imaging manifestation. Osteoporosis, osteochondral softening, bone destruction, osteomalacia sclerosis, periosteal reaction, cartilage calcification, bone necrosis, mineral deposition in the bone, and skeletal deformity are all abnormal manifestations of the skeleton.
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