Midterm Flashcards
(28 cards)
ALARA principal
ALARA stands for “as low as reasonably achievable”. ALARA means avoiding exposure to radiation that does not have a direct benefit to you, even if the dose is small
Radiography image on either film or digital x-ray will show fat as…
dark grey
All statements regarding Computer Tomography are true except…
Cross sectional images are not obtained with the use of x-ray
Other Answers:
x-ray and detectors rotate around the patient
High density object appears as high attenuation
Contrast material is used to enhance structure imaging
Low density objects appear as low attenuation
Scintigraphy utilizes…
Gamma radiation to form images after the injection of various radiopharmaceuticals.
Magnetic Resonance signal will vary according to the properties of the tissue/ structures being examined, except for…
Rebound fragmentation of the sound wave being received by the antenna
Other Answers:
Proton density of the tissue
Chemical environment of the hydrogen
Flow of fluids
T1 rate of return
Regarding Functional MRI: Perfusion-weighted imaging, the following statements are correct.
contrast material is injected for the evaluation of cerebral blood volume, flow, and transit time of contrast material.
Anaphylactic reactions that associate with Gd-base contrast material include all of the following except…
Tarlov Cystitis
Other Answers (which are true):
Hypotension
Bronchiospasm
Cardiac Arrest
Urticaria
Radiography image on either film or digital x-ray will show soft tissue as…
light grey
Chest X-Ray (CXR) PA in an erect position best permits evaluation of…
cardiac size
Abdominal X-ray is the equivalent to flying at 12,000 meters for …
150 hours
Computer Tomography primary investigates all the following except…
Tissue with elevated Glucose Metabolism
Other Answers (which are true):
Facial Trauma
Chest Trauma
Detection of Pulmonary Metastases
Cerebral Artery Aneurysm
Cerebral Artery Embolism
One hours ago, a 56 year old male has an onset of right side headache, spatial disorientation and left upper extremity weakness. Which is the most appropriate imaging method?
CT scan
Which of the following are not a form of contrast material used in x-ray or ultrasound imaging?
2-deoxyglucose labelled with fluorine-18
Other Answers (which are correct):
iodine
Barium
Micro bubble injection
The benefit of Magnetic Resonance Imaging is that it…
does not use radiation
Magnetic Resonance Imaging utilizes large electromagnets and RF coil to perform all the following except
evaluate tissue density, through electron penetration and RF coil frequency antenna reception.
Other Answers (which are true):
Analyze the volume of hydrogen molecules in the body’s tissue to evaluate anatomy and physiology
align hydrogen atom’s proton to a parallel or anti-parallel to the magnetic field.
align the hydrogen atom’s proton in the transverse plane.
apply a radiofrequency excitation pulse to hydrogen molecules in the body.
Which diagnostic method for Magnetic Resonance is the most often prescribed?
brain
MRI T2
-water is white
Choose the correct statement for T1-weighted Magnetic Resonance Images.
Fat appears as white
Magnetic Resonance Imaging of the brain is indicated for the following conditions except
Acute Cerebral Vascular Accident
Other Answers which are true:
Tumor
Seizures
Multiple Sclerosis
Intracranial Infection
Functional MRI method of FLAIR (FLUID-ATTENUATED INVERSION RECOVERY) provides images that…
Suppresses Cerebral Spinal Fluid to improve viewing of the periventricular hyper-intense lesions
Which of the following statements is true regarding SPECT (Single Photon Emission Computer Tomography)
Highly sensitive imaging that produces two-dimensional images by analyzing the release of gamma rays from radionuclide’s release of photons from radiopharmaceuticals, once injected into a body.
Which radiopharmaceutical has use in bone scintigraphy?
99mTc-Technetium (MDP or HDP)
Which radiopharmaceutical has a use in Thyroid scintigraphy?
99mTc- Technetium (pertechnetae)
