CT Basics
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Computed tomography review
- 1.All human tissues and organs originates from primary germ layers.which germ layer forms the central nervous system
- A.
Endoderm
- B.
Macroderm
- C.
Mesoderm
- D.
Ectoderm
- 2.Which cranial nerve has the widest distribution
- A.
Trigeminal
- B.
Hypoglossal
- C.
Vagus
- D.
Glossopharyngial
- 3.What is an important funtion of the choroid plexus
- A.
Separates the cerebral hemispheres
- B.
To protect the brains surface
- C.
To produce cerebral spinal fluid
- D.
To provide comunication between right and left cerebellum
- 4.The normal range of respiration for an adult is
- A.
5-10 breaths per minute
- B.
12-20 breaths per minute
- C.
20-30 breaths per minute
- D.
35-50 breaths per minute
- 5.Which of the following is a parenteral route of medication administration
- A.
Sublingual
- B.
Intramuccular
- C.
Transdermal
- D.
Oral
- 6.The preparation for a contrast ct exam of a patient with a prior alergic reaction may include
- A.
Premedication with steroids and antihestamines
- B.
A negative contrast agent
- C.
Increase of fluid intake for 24 hours
- D.
Refraining from urinating for 2 hours before the test
- 7.A common injection site for contrast would be
- A.
Cephalic vein
- B.
Antecubital vein
- C.
Basilic vein
- D.
All of the above
- 8.Which of these technical factors would directly effect patient dose
- A.
Matrix size
- B.
Algorithm
- C.
Mas
- D.
Window level
- 9.Preleminary questions before injection of iv contrast would include1. renal function2. allergic history3 cardiac history
- A.
1 only
- B.
1 and 2 only
- C.
3 only
- D.
1, 2, and 3
- 10.The term__________ refers to the number of ions formed when a substance disassociates in solution. it is used to determine the biological effects of iv contrast
- A.
Concentration
- B.
Osmolality
- C.
Solubility
- D.
Iodination
- 11.Which of the following lab values can be used to eval renal function
- A.
Bun
- B.
Creatinine
- C.
Ptt
- D.
A&b
- 12.An infection a patient aquires during their hospital (common to that hospital) stay is called
- A.
Blood-borne
- B.
Nosocomial
- C.
Iatrogenic
- D.
Staphylococcal
- 13.A contrast material that does not dissassotiate into charged particles in solution is called
- A.
Neutral
- B.
Non ionic
- C.
Osmolar
- D.
Ionic
- 14.The average range for adult bun levels is
- A.
1-4 mg/dl
- B.
5-20 mg/dl
- C.
23-30 mg/dl
- D.
45-60mg/dl
- 15.A condition in which cerebral ischemia is caused by systemic hypotention
- A.
Vasovagal reaction
- B.
Myocardial infarction
- C.
Transient ischemic attack
- D.
Hydrocephalus
- 16.Which interaction between xray beam and matter results in the largest pt. dose
- A.
Characteristic
- B.
Compton's scatter
- C.
Bremsstrahlung
- D.
Photoelectric effect
- 17.What is a common medication used to sedate small children in order to do a ct exam
- A.
Chloral hydrate
- B.
Lithium
- C.
Diazipam(valium)
- D.
Secobarbital sodium
- 18.The purpose of iv contrast adminisration is
- A.
Increase the contrast of adjacent structures
- B.
Increase beam attenuation of enhanced structures
- C.
Increase the cost to the patient
- D.
A and b
- 19.The adult spinal cord ends at what vertebral level
- A.
L1-2
- B.
Ll3-4
- C.
L5
- D.
Superior portion of the coccyx
- 20.The portion of the nephron that filters waste material from the blood plasma is
- A.
Afferent arteriole
- B.
Proximal tubule
- C.
Efferent arteriole
- D.
Glomerulus
- 21.Which of the paranasal sinuses is the last to develope
- A.
Frontal
- B.
Ethmoidal
- C.
Sphenoidal
- D.
Maxillary
- 22.What is an important function of the choroid plexus
- A.
To divide the cerebellum
- B.
To produce cerebrospinal fluid
- C.
To protect the brain
- D.
To provide comunication between the cerebella and cerebrum
- 23.What is the only movable joint in the cranium
- A.
Maxilary
- B.
Zigomatic
- C.
Temporomandibular
- D.
Sphenomandibular
- 24.Which gland can be palpated by placing the index and middle fingers just anterior and inferior to the earlobe
- A.
Parotid
- B.
Parathyroid
- C.
Submandibular
- D.
Sublingual
- 25.The digital to analog converter insures that the data is free from artifacts and contain enough usable data. this is known as
- A.
Formatting
- B.
Continuoussampling
- C.
Quality conversion
- D.
Preprocessing
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