A false positive In-111 WBC scan may be due to increased abdominal uptake in a patient:
a. that is currently taking antibiotics
b. with a sinus infection
c. with a stomach ulcer
d. with a renal cyst
e. with cholecystitis - ANSWER B. Sinus Infection due to sinus drainage
A patient receives 285uCi of I-123 NaI orally for a thyroid uptake study. Calculate the 24 hour
percent uptake using the given data:
Dose Count= 1425916 cpm
Background= 88 cpm
Patient counts= 193046 cpm
Patient Background count= 473 cpm - ANSWER 14%
(neck-thigh)(100)/(capsule-BKG)
(193046-473)(100)/(1425919-88)
The image was obtained while performing a WBB scan on a 62 year old male, the most prob-
able reason for the appearance on the image is:
a. metastatic disease
b. trauma to chest wall
c. localized osteoporosis
d. osteomyelitis
e. Paget's disease - ANSWER B. Trauma to chest wall
1
,(metastatic will appear sporadically, pagets will show increase brain, femur, and pelvis.
Trauma is usually displayed as a pattern)
You are receiving a completed MPI pharmacologic study which of the following descriptions
suggest that the patient has a myocardial infarction?
a. abnormal resting Tc99m tetrofosmin, normal stress Tc99m tetrofosmin
b. abnormal resting MIBI, normal stress Tl-201 Thallium Cl
c. normal resting Tc MIBI, normal stress Tl201
d. abnormal resting Tl201, abnormal stress Tc MIBI
e. Abnormal stress Tl201, normal redistribution Tl201 - ANSWER D. Both resting and
stress will appear abnormal to indicate an infarction
Which electron transition process involves monochromatic incident X-ray yeilding a photon
and other electron's conservation of energy by moving shells? - ANSWER Characteristic X
Ray Production
How many dpm will yield a count rate of 640 cpm when measured by a detector with a
counting efficiency of 85%? - ANSWER 753 dpm
E=C/A
A= 640cpm/0.85 =753
E=cpm/dpm
Proper patient transfer technique includes all of the following except:
a. letting the patient help as much as possible
b. maintaining a wide base of support
c. having the patient's center of gravity away from your COG
d. using muscles of the arms and legs for lifting
e. getting help when it is needed - ANSWER C. Center of gravity should be close together
2
, prior to performing an oncology PET/CT scan, the patient height and weight is recorded in
order to assist in the circulation of
a. CTDI
b. EF
c. CO
d. SUV
e. CTAC - ANSWER D. standard uptake value
If tracer concentration is visualized in the skeleton, kidneys, and liver on a WBB scan the
most likely explanation for these findings is that:
a. imaging was performed too soon following tracer admin
b. the radiopharm contained excess free Tc
c. the patients renal function is compromised
d. the incorrect radiopharm was administered
e. there is excess alumina in the generator eluate - ANSWER e. excess alumina will cause
hydrolyzed reduced Tc build up in the elution and cause artifacts on WBB images
Which of the following image findings is most consistent with chromatography results of a Tc
SC kit demonstrating 90% radiopharm purity?
a. thyroid uptake
b. bone uptake
c. lung uptake
d. gallbladder activity
c. kidney uptake - ANSWER A. thyroid uptake, 92% is the radiopharm purity required for
SC kits and free Tc will localize in the thyroid naturally
The results shown below were obtained when the Tc99m eluate was assayed for Mo99
breakthrough at 0600, immediately following elution
Mo99 10uCi
3
a. that is currently taking antibiotics
b. with a sinus infection
c. with a stomach ulcer
d. with a renal cyst
e. with cholecystitis - ANSWER B. Sinus Infection due to sinus drainage
A patient receives 285uCi of I-123 NaI orally for a thyroid uptake study. Calculate the 24 hour
percent uptake using the given data:
Dose Count= 1425916 cpm
Background= 88 cpm
Patient counts= 193046 cpm
Patient Background count= 473 cpm - ANSWER 14%
(neck-thigh)(100)/(capsule-BKG)
(193046-473)(100)/(1425919-88)
The image was obtained while performing a WBB scan on a 62 year old male, the most prob-
able reason for the appearance on the image is:
a. metastatic disease
b. trauma to chest wall
c. localized osteoporosis
d. osteomyelitis
e. Paget's disease - ANSWER B. Trauma to chest wall
1
,(metastatic will appear sporadically, pagets will show increase brain, femur, and pelvis.
Trauma is usually displayed as a pattern)
You are receiving a completed MPI pharmacologic study which of the following descriptions
suggest that the patient has a myocardial infarction?
a. abnormal resting Tc99m tetrofosmin, normal stress Tc99m tetrofosmin
b. abnormal resting MIBI, normal stress Tl-201 Thallium Cl
c. normal resting Tc MIBI, normal stress Tl201
d. abnormal resting Tl201, abnormal stress Tc MIBI
e. Abnormal stress Tl201, normal redistribution Tl201 - ANSWER D. Both resting and
stress will appear abnormal to indicate an infarction
Which electron transition process involves monochromatic incident X-ray yeilding a photon
and other electron's conservation of energy by moving shells? - ANSWER Characteristic X
Ray Production
How many dpm will yield a count rate of 640 cpm when measured by a detector with a
counting efficiency of 85%? - ANSWER 753 dpm
E=C/A
A= 640cpm/0.85 =753
E=cpm/dpm
Proper patient transfer technique includes all of the following except:
a. letting the patient help as much as possible
b. maintaining a wide base of support
c. having the patient's center of gravity away from your COG
d. using muscles of the arms and legs for lifting
e. getting help when it is needed - ANSWER C. Center of gravity should be close together
2
, prior to performing an oncology PET/CT scan, the patient height and weight is recorded in
order to assist in the circulation of
a. CTDI
b. EF
c. CO
d. SUV
e. CTAC - ANSWER D. standard uptake value
If tracer concentration is visualized in the skeleton, kidneys, and liver on a WBB scan the
most likely explanation for these findings is that:
a. imaging was performed too soon following tracer admin
b. the radiopharm contained excess free Tc
c. the patients renal function is compromised
d. the incorrect radiopharm was administered
e. there is excess alumina in the generator eluate - ANSWER e. excess alumina will cause
hydrolyzed reduced Tc build up in the elution and cause artifacts on WBB images
Which of the following image findings is most consistent with chromatography results of a Tc
SC kit demonstrating 90% radiopharm purity?
a. thyroid uptake
b. bone uptake
c. lung uptake
d. gallbladder activity
c. kidney uptake - ANSWER A. thyroid uptake, 92% is the radiopharm purity required for
SC kits and free Tc will localize in the thyroid naturally
The results shown below were obtained when the Tc99m eluate was assayed for Mo99
breakthrough at 0600, immediately following elution
Mo99 10uCi
3
