NMTCB COMPREHENSIVE STUDY GUIDE
2026 FULL QUESTIONS AND SOLUTIONS
GRADED A+
• In which RP is Tc99m left in the valence state of +7 a. sulfur colloid b.
MAA c. MAG3 d. sestamibi.
Answer: A. Sulfur colloid
• Exposure Limit: Whole Body.
Answer: 5 rem/yr 50 mSv/yr
• Exposure Limit: Skin.
Answer: 50 rem/yr 500 mSv/yr
• Exposure Limit: Extremity.
Answer: 50 rem/yr 500 mSv/yr
• Exposure Limit: Organ/Tissue.
Answer: 50 rem/yr 500 mSv/yr
• Exposure Limit: Lens of Eye.
Answer: 15 rem/yr 150 mSv/yr
• Exposure Limit: Fetus.
Answer: 0.5 rem/yr 5 mSv/yr
• a tech receives a request for a patient to receive Sm153 for palliation of pain
from bone mets. the patient has a WBC count of 3500 and 40000 platelets.
what should happen next? a. the order should be changed to Sr89 b. the tx
should be delayed until the platelet ct is at least 60,000 c. the tx should be
delayed until the WBC is below 2400 d. the Sm153 should be ordered.
Answer: B. the tx should be delayed until the platelet ct is at least 60,000
• Exposure Limit: General Public.
Answer: 0.1 rem/yr 1 mSV/yr
,• Radioactive I White I.
Answer: Surface: 0.5 mR/h 1 m: N/A
• Radioactive II Yellow II.
Answer: Surface: 50 mR/h 1 m: 1 mR/h
• Radioactive III Yellow III.
Answer: Surface: 200 mR/h 1 m: 10 mR/h
• a SC kit requires the addition of 1-3 ml containing no more than 500mCi of
TcO4-. in addition, 1.5 ml of solution A must be added before boiling, and
1.5 ml of Solution B must be added after cooling. If the kit is correctly
prepared, what is the max concentration of Tc99m it could contain? a. 83
mCi/ml b. 125 mCi/ml c. 167 mCi/ml d. 500 mCi/ml.
Answer: B. 125 mCi/ml max. 1 ml TcO4- containing 500 mCi
500/(1.5+1.5+1) = 125 mCi/ml
• A hine-duley phantom is useful for testing the spatial resolution and spatial
linearity with only one image. a. true b. false.
Answer: B. false
• Caution: Radioactive Materials.
Answer: Posted where radioactive materials are stored and exceed the limit:
2 mR/h 0.02 mSv/h
• the advantage of a lung ventilation scan performed with Xenon is a. the
ability to match perfusion and vent positioning b. the ability to detect
delayed washout c. the ability to perform the exam at the patient's bedside d.
the ability to perform perfusion before ventilation without increasing the
dose given for the vent study.
Answer: B. the ability to detect delayed washout
• Caution: Radiation Area.
Answer: Posted where one can receive more than this at 30 cm: 5 mR/h 0.05
mSv/h
• A diphosphonate kit contian 180 mCi of Tc99m in 30 ml when it is prepared
, at 8am. Immediately, a 20 mCi dose is withdrawn for a bone scan. if the
patient arrives late at 9:30 and half the volume is accidentally discharged,
how much volume from the kit must now be added to the syringe to correct
the dose to 20 mCi? (no other doses have been withdrawn meanwhile, and
the decay factor for 1.5 hrs is 0.841) a. 1.5 ml b. 2.0 ml c. 2.3 ml d. 2.5 ml e.
2.7 ml.
Answer: C. 2.3 mL lots of math, sorry :(
• Caution: High Radiation Area.
Answer: Posted where one can receive more than this at 30 cm: 100 mR/hr 1
mSv/h
• Grave Danger: Very High Radiation Area.
Answer: Posted in front of area where one can receive more than this at 1 m:
500 rads/h 5 grays/h
• Reactor produced isotopes.
Answer: Mo-99, Tc-99m, I-131, I-125, Xe-133, Sr-89, Sm-153
• Cyclotron produced radionuclides.
Answer: I-123, Ga-67, Tl-201, In-111, and all positron emitters
• a WBS bone scan film shows a good posterior image, but the anterior view
appears diffuse with greater soft tissue activity. what is the probable cause?
a. wrong collimator used for anterior b. increased patient to detector distance
on the ant relative to the post c. low tagging efficiency of the RP d. patient
was not sufficiently hydrated e. none of the above.
Answer: b. increased patient to detector distance on the ant relative to the
post
• Which of the following will not reduce the probability of contamination
from perspiration and saliva of a therapy patient? a. disposable eating
utensils b. plastic covering over the mattress c. covering the phone receiver
with plastic d. collecting the patient's waste and storing until decayed to
background.
Answer: d. collecting the patient's waste and storing until decayed to
2026 FULL QUESTIONS AND SOLUTIONS
GRADED A+
• In which RP is Tc99m left in the valence state of +7 a. sulfur colloid b.
MAA c. MAG3 d. sestamibi.
Answer: A. Sulfur colloid
• Exposure Limit: Whole Body.
Answer: 5 rem/yr 50 mSv/yr
• Exposure Limit: Skin.
Answer: 50 rem/yr 500 mSv/yr
• Exposure Limit: Extremity.
Answer: 50 rem/yr 500 mSv/yr
• Exposure Limit: Organ/Tissue.
Answer: 50 rem/yr 500 mSv/yr
• Exposure Limit: Lens of Eye.
Answer: 15 rem/yr 150 mSv/yr
• Exposure Limit: Fetus.
Answer: 0.5 rem/yr 5 mSv/yr
• a tech receives a request for a patient to receive Sm153 for palliation of pain
from bone mets. the patient has a WBC count of 3500 and 40000 platelets.
what should happen next? a. the order should be changed to Sr89 b. the tx
should be delayed until the platelet ct is at least 60,000 c. the tx should be
delayed until the WBC is below 2400 d. the Sm153 should be ordered.
Answer: B. the tx should be delayed until the platelet ct is at least 60,000
• Exposure Limit: General Public.
Answer: 0.1 rem/yr 1 mSV/yr
,• Radioactive I White I.
Answer: Surface: 0.5 mR/h 1 m: N/A
• Radioactive II Yellow II.
Answer: Surface: 50 mR/h 1 m: 1 mR/h
• Radioactive III Yellow III.
Answer: Surface: 200 mR/h 1 m: 10 mR/h
• a SC kit requires the addition of 1-3 ml containing no more than 500mCi of
TcO4-. in addition, 1.5 ml of solution A must be added before boiling, and
1.5 ml of Solution B must be added after cooling. If the kit is correctly
prepared, what is the max concentration of Tc99m it could contain? a. 83
mCi/ml b. 125 mCi/ml c. 167 mCi/ml d. 500 mCi/ml.
Answer: B. 125 mCi/ml max. 1 ml TcO4- containing 500 mCi
500/(1.5+1.5+1) = 125 mCi/ml
• A hine-duley phantom is useful for testing the spatial resolution and spatial
linearity with only one image. a. true b. false.
Answer: B. false
• Caution: Radioactive Materials.
Answer: Posted where radioactive materials are stored and exceed the limit:
2 mR/h 0.02 mSv/h
• the advantage of a lung ventilation scan performed with Xenon is a. the
ability to match perfusion and vent positioning b. the ability to detect
delayed washout c. the ability to perform the exam at the patient's bedside d.
the ability to perform perfusion before ventilation without increasing the
dose given for the vent study.
Answer: B. the ability to detect delayed washout
• Caution: Radiation Area.
Answer: Posted where one can receive more than this at 30 cm: 5 mR/h 0.05
mSv/h
• A diphosphonate kit contian 180 mCi of Tc99m in 30 ml when it is prepared
, at 8am. Immediately, a 20 mCi dose is withdrawn for a bone scan. if the
patient arrives late at 9:30 and half the volume is accidentally discharged,
how much volume from the kit must now be added to the syringe to correct
the dose to 20 mCi? (no other doses have been withdrawn meanwhile, and
the decay factor for 1.5 hrs is 0.841) a. 1.5 ml b. 2.0 ml c. 2.3 ml d. 2.5 ml e.
2.7 ml.
Answer: C. 2.3 mL lots of math, sorry :(
• Caution: High Radiation Area.
Answer: Posted where one can receive more than this at 30 cm: 100 mR/hr 1
mSv/h
• Grave Danger: Very High Radiation Area.
Answer: Posted in front of area where one can receive more than this at 1 m:
500 rads/h 5 grays/h
• Reactor produced isotopes.
Answer: Mo-99, Tc-99m, I-131, I-125, Xe-133, Sr-89, Sm-153
• Cyclotron produced radionuclides.
Answer: I-123, Ga-67, Tl-201, In-111, and all positron emitters
• a WBS bone scan film shows a good posterior image, but the anterior view
appears diffuse with greater soft tissue activity. what is the probable cause?
a. wrong collimator used for anterior b. increased patient to detector distance
on the ant relative to the post c. low tagging efficiency of the RP d. patient
was not sufficiently hydrated e. none of the above.
Answer: b. increased patient to detector distance on the ant relative to the
post
• Which of the following will not reduce the probability of contamination
from perspiration and saliva of a therapy patient? a. disposable eating
utensils b. plastic covering over the mattress c. covering the phone receiver
with plastic d. collecting the patient's waste and storing until decayed to
background.
Answer: d. collecting the patient's waste and storing until decayed to
