NMTCB CT BOARD UPDATED EXAM WITH MOST TESTED
QUESTIONS AND ANSWERS | GRADED A+ | ASSURED
SUCCESS WITH DETAILED RATIONALES
1. What does CBF stand for in neurological assessments?
A. Cerebral Blood Volume
B. Cerebral Blood Flow ✅
C. Cranial Bone Formation
D. Cortical Brain Function
Rationale: CBF (Cerebral Blood Flow) measures blood circulation in the brain (normal: 50-60
mL/100g/min).
2. What is the normal range for cerebral blood volume (CBV)?
A. 1-2 mL/100g
B. 4-5 mL/100g ✅
C. 8-10 mL/100g
D. 12-15 mL/100g
Rationale: CBV represents total blood in brain vasculature, normally 4-5 mL/100g.
3. A patient’s platelet count is 90,000/µL. What does this indicate?
A. Normal range
B. Thrombocytopenia (increased bleeding risk) ✅
C. Thrombocytosis (clotting risk)
D. No clinical significance
Rationale: Normal platelets = 140,000–440,000/µL. <100,000 = thrombocytopenia.
4. A patient on warfarin has an INR of 3.5. What does this suggest?
A. Subtherapeutic anticoagulation
B. Supratherapeutic (high bleeding risk) ✅
C. Normal for warfarin therapy
D. Indicates liver failure
,Rationale: Therapeutic INR = 2-3 for most conditions. >3.5 = increased bleeding risk.
5. Which PTT value is within the normal range?
A. 10 seconds
B. 30 seconds ✅
C. 50 seconds
D. 70 seconds
Rationale: Normal PTT = 25-35 seconds (assesses intrinsic clotting pathway).
6. A patient’s BUN is 30 mg/dL. What is the most likely concern?
A. Dehydration or renal dysfunction ✅
B. Overhydration
C. Liver failure
D. Hypoglycemia
Rationale: Normal BUN = 7-25 mg/dL. Elevated BUN suggests dehydration or kidney issues.
7. A male patient’s creatinine is 2.0 mg/dL. What does this indicate?
A. Normal kidney function
B. Impaired renal function ✅
C. Muscle wasting
D. Liver disease
Rationale: Normal creatinine = 0.5–1.5 mg/dL. Elevated levels suggest kidney dysfunction.
8. What is the normal GFR for women?
A. 30 ± 5 mL/min
B. 60 ± 10 mL/min ✅
C. 90 ± 15 mL/min
D. 120 ± 20 mL/min
Rationale: Women have slightly lower GFR than men due to muscle mass differences.
, 9. A child weighs 20 kg. What is the maximum IV contrast dose they should receive?
A. 1 mL/kg
B. 3 mL/kg (60 mL max) ✅
C. 5 mL/kg
D. 10 mL/kg
Rationale: Pediatric contrast dose should not exceed 3 mL/kg to prevent toxicity.
10. How long does it take for IV contrast to be half-excreted?
A. 5-10 minutes
B. 1-2 hours ✅
C. 6-8 hours
D. 24 hours
Rationale: IV contrast has a short half-life (1-2 hrs) and is excreted renally.
11. What is the barium sulfate concentration used in GI studies?
A. 0.1-0.5%
B. 1-3% ✅
C. 5-10%
D. 20-30%
Rationale: Barium solutions are typically 1-3% for optimal imaging.
12. What percentage of iodine should water-soluble oral contrast contain?
A. 0.5-1%
B. 2-5% ✅
C. 10-15%
D. 20-25%
Rationale: Water-soluble contrasts (e.g., Gastrografin) contain 2-5% iodine for visibility.
13. What defines high-osmolar contrast media (HOCM)?
A. 100-500 mOsm/kg
B. 1000-2400 mOsm/kg ✅
QUESTIONS AND ANSWERS | GRADED A+ | ASSURED
SUCCESS WITH DETAILED RATIONALES
1. What does CBF stand for in neurological assessments?
A. Cerebral Blood Volume
B. Cerebral Blood Flow ✅
C. Cranial Bone Formation
D. Cortical Brain Function
Rationale: CBF (Cerebral Blood Flow) measures blood circulation in the brain (normal: 50-60
mL/100g/min).
2. What is the normal range for cerebral blood volume (CBV)?
A. 1-2 mL/100g
B. 4-5 mL/100g ✅
C. 8-10 mL/100g
D. 12-15 mL/100g
Rationale: CBV represents total blood in brain vasculature, normally 4-5 mL/100g.
3. A patient’s platelet count is 90,000/µL. What does this indicate?
A. Normal range
B. Thrombocytopenia (increased bleeding risk) ✅
C. Thrombocytosis (clotting risk)
D. No clinical significance
Rationale: Normal platelets = 140,000–440,000/µL. <100,000 = thrombocytopenia.
4. A patient on warfarin has an INR of 3.5. What does this suggest?
A. Subtherapeutic anticoagulation
B. Supratherapeutic (high bleeding risk) ✅
C. Normal for warfarin therapy
D. Indicates liver failure
,Rationale: Therapeutic INR = 2-3 for most conditions. >3.5 = increased bleeding risk.
5. Which PTT value is within the normal range?
A. 10 seconds
B. 30 seconds ✅
C. 50 seconds
D. 70 seconds
Rationale: Normal PTT = 25-35 seconds (assesses intrinsic clotting pathway).
6. A patient’s BUN is 30 mg/dL. What is the most likely concern?
A. Dehydration or renal dysfunction ✅
B. Overhydration
C. Liver failure
D. Hypoglycemia
Rationale: Normal BUN = 7-25 mg/dL. Elevated BUN suggests dehydration or kidney issues.
7. A male patient’s creatinine is 2.0 mg/dL. What does this indicate?
A. Normal kidney function
B. Impaired renal function ✅
C. Muscle wasting
D. Liver disease
Rationale: Normal creatinine = 0.5–1.5 mg/dL. Elevated levels suggest kidney dysfunction.
8. What is the normal GFR for women?
A. 30 ± 5 mL/min
B. 60 ± 10 mL/min ✅
C. 90 ± 15 mL/min
D. 120 ± 20 mL/min
Rationale: Women have slightly lower GFR than men due to muscle mass differences.
, 9. A child weighs 20 kg. What is the maximum IV contrast dose they should receive?
A. 1 mL/kg
B. 3 mL/kg (60 mL max) ✅
C. 5 mL/kg
D. 10 mL/kg
Rationale: Pediatric contrast dose should not exceed 3 mL/kg to prevent toxicity.
10. How long does it take for IV contrast to be half-excreted?
A. 5-10 minutes
B. 1-2 hours ✅
C. 6-8 hours
D. 24 hours
Rationale: IV contrast has a short half-life (1-2 hrs) and is excreted renally.
11. What is the barium sulfate concentration used in GI studies?
A. 0.1-0.5%
B. 1-3% ✅
C. 5-10%
D. 20-30%
Rationale: Barium solutions are typically 1-3% for optimal imaging.
12. What percentage of iodine should water-soluble oral contrast contain?
A. 0.5-1%
B. 2-5% ✅
C. 10-15%
D. 20-25%
Rationale: Water-soluble contrasts (e.g., Gastrografin) contain 2-5% iodine for visibility.
13. What defines high-osmolar contrast media (HOCM)?
A. 100-500 mOsm/kg
B. 1000-2400 mOsm/kg ✅
