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NMTCB Board Exam review
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NMTCB Board Exam reviewWhat are the 3 phases of Xe-133 ventilation? - answer1. Single Breath
2. Equilibrium
3. Washout
How much blood flow is supplied to lungs from bronchial circulation?
A. 10%
B. 5%
C. 20%
D. 50% - answerB. 5%
What is the min. number of particles to be injected in adults?
A. 50,000
B. 60,000
C. 200,000
D. 800,000 - answerB. 200,000-700,000 range
What is the particle size of an MAA particle?
A. 0.1 - 0.3 um
B. 1 - 3 um
C. 0.5 - 0.10 um
D. 5 - 100 um - answerD. 5 - 100 um
Biological Half-life of MAA in the lungs?
A. 2 -4 hrs
B. 4 - 5 hrs
C. 6 hrs
D. 24 hrs - answerA. 2 - 4 hrs
What radiopharmaceutical is used for aerosol?
A. 99mTc MAA
B. DTPA
C. 133- Xe gas
D. B and C - answerB. DTPA (99m Tc-diethylenetriamine pentaacetic acid)
How much aerosol is administered?
A. 5 mCi
B. 15 mCi
C. 25mCi
D 40mCi - answerC. 25 mCi (range: 25-35mCi)
What view is used when performing lung scans?
, A. Posterior
B. Anterior
C Anterior & Posterior
D. RAO - answerA. Posterior
What is a fissure sign in a lung scan? - answerlinear defects in regions caused by fluid
in the fissure of patient with CHF
What is a stripe sign in a lung scan? - answer~ indication of a low probability of
pulmonary embolus
~ associated with atelectasis (Collapsing of the lung)
Beta Minus Decay - answerNucleus is neutron rich and adds 1 to the atomic number to
gain more protons (neutron converted to a proton)
Alpha Decay - answerstructurally identical to a helium atom
~ occurs in heavy atomic nuclei (atomic mass > 150)
~ consist of 2 protons and 2 neutrons
~ subtract 4 from mass number and 2 from the atomic number
What type of particle is big, heavy and slow? Can be stopped by a sheet of paper. The
range is limited. Destructive to internal cells and organs. - answerAlpha
Wha type of particle is small, light, and fast? Can be stopped by dense plastic but
destructive to dense tissue. Moderate travel range. - answerBeta
Positron Decay - answerHaving excess protons (proton is converted into a neutron)
~ So you subtract 1 from the atomic number
Electron Capture - answer~ Alternative to Positron decay
~ Frequent in heavier elements
~ So you subtract 1 from the atomic number
Internal Conversion - answerA way for an electron to reach from an excited state to a
metastable state.
Hine-Duley Phantom - answerThis phantom contains lead bars and spaces of 3
different widths and requires multiple images to assess resolution over entire detector
Thick crystal results in better - answersensitivity
What are the two types of radioactive emissions? - answerParticulate (particles) and
Electromagnetic (photons)
Beta particles originate in the nucleus. (T/F) - answerTrue
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