Medical Physics ABR Part 1 Clinical Exam Questions With Correct Answers

Medical Physics ABR Part 1 Clinical
Exam Questions With Correct Answers


Rate the body systems in order of decreasing radio-sensitivity. -
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CORRECT ANSWER✔✔-1. Hematopoietic, Reproductive (2-5 Gy)
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2. Skin, cornea, lens of eyes, GI organs (10 Gy)
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3. Bone and cartilage
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4. Lungs, kidneys, Liver, Pancreas
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5. Muscle, brain, nerves, spinal cord (20 Gy)
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a. What are the components of the cell cycle & their order?
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b. What is the relative radio-sensitivity of each? - CORRECT
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ANSWER✔✔-Mitosis (M), Gap 1 (G1), Synthesis (S), Gap 2 (G2) | | | | | | | | |




a. M -> G1 -> S -> G2
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b. M > G2 > G1 > S
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Cerebellum: |




a. Function
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b. Location - CORRECT ANSWER✔✔-a. Motor control, balance
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b. Directly posterior to the brain stem.
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,Cerebrum:
a. Function and properties
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b. Divisions - CORRECT ANSWER✔✔-a. Higher functions: thought,
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action. |




b. 4 lobes: frontal (anterior), parietal (superior), occipital (posterior),
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temporal (lateral x 2). | | |




Cerebral cortex - CORRECT ANSWER✔✔-Sheet of neural tissue
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outermost to the cerebrum. Grey matter
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Brain steam function - CORRECT ANSWER✔✔-Basic vital life functions
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(breathing, heartbeat, etc. | |




Corpus callosum - CORRECT ANSWER✔✔-Connects the two parts of the
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cerebrum.
{Lets the two hemispheres talk to each other, i.e. "call" each other}
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Alveoli
a. Location
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b. Function - CORRECT ANSWER✔✔-a. Lungs
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b. Air-lung interface. Diffusion of O2, CO2.
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,Hiatal hernia
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a. Describe condition
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b. Imaging modality to diagnose? - CORRECT ANSWER✔✔-a. Part of the
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stomach sticks upward into the chest through opening in the
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diaphragm.
b. UGI x-ray after ingestion of barium.
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Upper gastrointestinal. - CORRECT ANSWER✔✔-UGI. Esophagus,
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stomach, and duodenum | |




Lower gastrointestinal - CORRECT ANSWER✔✔-LGI. Small and Large
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intestine. Stool. |




US transducers:
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a. What is the angle of orientation of the two surfaces?
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b. How thick are the transducers in terms of the wavelength?
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c. Are the pressure waves and voltage in phase or out of phase? -
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CORRECT ANSWER✔✔-a. 180 degrees.
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b. lambda/2
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c. pressure: in phase. Voltage: out of phase.
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Stroke

, a. Describe
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b. Effects - CORRECT ANSWER✔✔-a. sudden loss of consciousness
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resulting when the rupture or occlusion of a blood vessel leads to
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oxygen lack in the brain
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b. Loss of brain function, ischemia, hemorrhage
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Ischemia - CORRECT ANSWER✔✔-Insufficient blood flow to an area
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Hemorrhage - CORRECT ANSWER✔✔-Flow of blood from a ruptured
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blood vessels.|




Transurethral resection - CORRECT ANSWER✔✔-Small pieces of tissue
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from a nearby structure (typically prostate) are removed through the
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wall of the urethra.
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Foramen magnum - CORRECT ANSWER✔✔-A large hole in the occipital
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bone (base of skull) for the passage of nerves into the spinal cord.
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Liver cirrhosis
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a. Describe
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b. Causes
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c. Effects - CORRECT ANSWER✔✔-a. Cells are progressively destroyed
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and replaced by fatty and fibrous tissue that surrounds the intrahepatic
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