Camrt exam stuvia - Study guides, Class notes & Summaries

You receive a req on a 1yr old who is Dx with Talipes equinovarus. What body part should you expect to x-ray? - ACCURATE ANSWER-Feet What formula is used to calculate mAs when SID has been altered? - ACCURATE ANSWER-Old mAs/new mAs = old SID squared/new SID squared When doing single contrast barium enemas, what is the predominant type of electron interaction occurring in the patient? - ACCURATE ANSWER-Photoelectric What is an advantage of CT over conventional radiography? - ACCURATE ANS...

What is cerebral angiography - ACCURATE ANSWER-study of blood vessels in the brain, to provide a vascular road map that enabled physicians to localize and diagnose pathology or other anomalies of the brain and neck Contrast range for cerebral angiography - ACCURATE ANSWER-5-10ml What is thoracic angiography - ACCURATE ANSWER-Demonstrates the contour and integrity of the thoracic vasculature What is pulmonary angiography - ACCURATE ANSWER-Study of the pulmonary vessels How much contra...

artifact - ACCURATE ANSWER-optical density / brightness on an image unrelated to the intended patient anatomy, at the time prosthesis and fixation - ACCURATE ANSWER-internal fixators, external fixation devices and prostheses are not considered to be artifacts and often must be fully included implanted devices - ACCURATE ANSWER-implanted devices such as pacemakers, neurostimulators, breast and cochlear implants are also not considered to be artifacts Exposure or Acquisition Artifacts - A...

Stimulate nerves in the body to stimulate epinephrine/norepinephrine - ACCURATE ANSWER-What do adrenergics do? Epinephrine Dopamine - ACCURATE ANSWER-Examples of adrenergic medications Eliminate sensation - ACCURATE ANSWER-What do anaesthetics do? Xylocaine (lidocaine) - ACCURATE ANSWER-Examples of anaesthetics medications used in MI Reduce abnormal electrical activity in the brain - ACCURATE ANSWER-What do anti anxiety pharmaceuticals do? Ativan (lorazepam) Versed (midazolam) -...

How far away must the operator stand from the xray tube if not covered with lead? - ANSWER 3 meters 90% of man made radiation to the population is related to? - ANSWER Medical Radiography and Dental For each peak xray voltage, what lead equivalent is required? 100kV or less (o-100) Between 101kV-149kV 150kV or greater (150+) - ANSWER 0-100kV = 0.25mm of lead Greater than 100kV but less then 150kV = 0.35mm of lead 150kV or greater = 0.50mm of lead What protective equipment is ...

Radiation worker = 20mSv Public = 1mSv - ACCURATE ANSWER-What is the whole body dose for radiation workers? Members of the public? Radiation worker = 150mSv Public = 15mSv - ACCURATE ANSWER-What is the dose for the lens of the eye for radiation workers? Members of the public? Radiation worker = 500mSv Public = 50mSv - ACCURATE ANSWER-What is the dose for the skin for radiation workers? Members of the public? The patient - ACCURATE ANSWER-Who/what/where is the largest source of scatte...

mAs - ACCURATE ANSWER-mA x s = mAS milliaperage x seconds = mAs kV - ACCURATE ANSWER-kilovolt = 15% rule increase kV by 15% = double the amount of radiation emitted decrease kV by 15% = half the amount of radiation emitted Watts (W) - ACCURATE ANSWER-Volts x Amps V x A = W grid ratio - ACCURATE ANSWER-GR = h/D

What are the four safety zones - ACCURATE ANSWER-Zone 1: public area, hallways etc Zone 2: Patients screened here, under supervision not free to roam. Zone 3: physically restricted entry, key locks. Screened patients and personnel only. Zone 4: magnet room What is the difference between level one personnel and level two personnel? - ACCURATE ANSWER-Level one are those with minimal safety MRI training, office staff etc. Level two is techs, rads, nursing staff with extensive trai...

half-life and energy of Tc-99m - ANSWER T= 6hrs 140keV half-life and energy of Mo-99 - ANSWER T=66hrs 740keV and 778keV half-life and energy of I-131 - ANSWER T=8 days 364keV half-life and energy of I-123 - ANSWER T=13hrs 159keV half-life and energy of In-111 - ANSWER T=67hrs 171keV and 245keV Half life and energy of Xenon-133? - ANSWER 5 days. 81 keV. half-life and energy of Tl-201 - ANSWER T=3 days 69-82keV (Hg x-rays), 135keV, 167keV half-life and energy of Ga-67 -...

Representative of Ontario (CAMRT) - Answer Liz Lorusso President of CAMRT - Answer Karren Fader CEO of CAMRT - Answer Francois Couillard Director of Education of CAMRT - Answer Elaine Dever Essay awards open to students - Answer Dr. Petrie Memorial Award L.J. Cartwright Award Sister Mary Arthur Sharing The Light Award