PET Blackboard

Which PET radionuclide is produced by a generator? A. 82Rb B. 15O C. 18F D. 13N

A. 82Rb

B. Mass at the right lung base with rim of increased activity...physiologic uptake in the bladder

A. Hypermetabolic activity in the infracarinal region...increased activity in both adrenal glands B. Mass at the right lung base with rim of increased activity...physiologic uptake in the bladder C. The chest demonstrates several punctate hypermetabolic foci....liver metastases D. The chest demonstrates several punctate hypermetabolic foci...physio- logic uptake in the abdomen and pelvis

C. Atrial Fibrillation

A. Ventricular fibrillation B. Normal Rhythm C. Atrial Fibrillation D. Ventricular tachycardia

Patients injected for a F-18 FDG tumor scan may do which of the following during the uptake phase? A. listen to music or audio books B. exercise C. eat D. leave the PET area and return in 4 hours

A. listen to music or audio books

PET imaging with F-18 FDG is suboptimal for prostate cancer because: A. the gland has low glycolytic activity B. its proximity to the bladder makes the images difficult to interpret C. the gland is too small to visualize D. the normal prostate gland has generally increased uptake

A. the gland has low glycolytic activity

In a negative-ion cyclotron the function of the stripping foil is to: A. keep the beam of charged particles focused B. extract the beam and guide it onto the target C. compensate for the relativistic mass increase D. slightly reduce the beam's energy E. make the beam's orbit perfectly circular

B. extract the beam and guide it onto the target

Compared with conventional (axial) CT scanning, spiral-helical CT has: A.longer interscan delays. B. faster imaging times. C.increased misregistration artifacts. D. B and C are correct.

B. faster imaging times.

Which statement is FALSE about C-11 in PET imaging? A. 20 minute half-life makes transport of isotope difficult B. has a better resolution than F-18 C. it is a cyclotron produced isotope D. short half-life makes long uptake times impractical

B. has a better resolution than F-18

A patient arrives for a C-11 Choline scan. The patient is a diabetic and just took their insulin. What should you do? A. call the physician and ask if the insulin will interfere with the exam B. insert an IV and and prep patient for scan C. reschedule the scan for another day D. have patient wait four hours and return for the scan

B. insert an IV and and prep patient for scan

How can partial volume averaging be reduced? A.scanning with thicker slices B.scanning with thinner slices C.using a half-scan algorithm D. B and C are correct.

B. scanning with thinner slices

A negative-ion cyclotron is kept at a very high vacuum to: A. hold the pole pieces together B. allow the magnetic field to fill the accelerating chamber C. insulate the high voltage on the accelerating electrodes D. reduce the loss of charged particles during acceleration

C & D

If an 18F-FDG dose is prepared at 05:30am and contains 2080 MBq, how much activity will be left at 08:00am for administration? A. 15.6 mCi B. 18.4 mCi C. 21.8 mCi D. 24.6 mCi

C. 21.8 mCi

A pitch of _____ results in the highest dose to the patient. A. 1 B. 2 C.less than 1

C. less than 1

During cyclotron operation, particles are generated in bursts by the ion source. Name the two negative charged ions that can be generated. A. Nitrogen and Helium B. Helium and Hydrogen C. Helium and Deuterium D. Hydrogen and Deuterium E. all of the above

D. Hydrogen and Deuterium

In PET, the normalization correction is used to: A. convert counts/pixel to activity/volume B. correct for nonuniform attenuation correction C. remove random coincident events D. correct for the variations in efficiency in the lines of response

D. correct for the variations in efficiency in the lines of response

Patient care procedures performed immediately prior to the F-18 FDG injection for a PET tumor study include: A. catheterization B. 12-lead EKG monitoring C. EEG monitoring D. glucose level testing

D. glucose level testing

Which of the following conditions would indicate that F-18 FDG should NOT be injected for a F-18 FDG tumor scan? A. EEG shows seizure activity B. patient had just taken Ativan C. patient had a CT with contrast earlier in the day D. patient glucose level >200 mg/dl E. patient has IV bag containing antibiotics in normal saline

D. patient glucose level >200 mg/dl

A hospital patient comes for a F-18 FDG PET scan with heparin running in 5% dextrose solution at 20ml per hour. The patient has not eaten for 12 hours and is non-diabetic. The blood glucose measures 125 mg/dL. It is permissible to inject this patient. True False

False

Rubidium-82 is produced by deuteron bombardment of C-12 in a cyclotron. True False

False

Sites of infection may be seen on FDG PET images. True False

True

If the patient is able, have him bring his arms up, above his head. Increase the kVp to reduce streaking caused by arms. Increase mA to reduce noise in image. Increase slice thickness to reduce noise in image.

What could be done differently to reduce the artifacts seen in the following images?

The blood glucose of an asymptomatic diabetic FDG PET patient prior to injection is measured to be 51 mg/dl. As the injecting technologist, what should you do A. reschedule the patient because their blood glucose is below the normal limit B.have the patient leave to eat to raise their blood glucose and return later in the day C. inject and give the patient a can of juice to drink immediately post injection D.inject and wait 30-45 minutes before giving juice to raise blood glucose

inject and wait 30-45 minutes before giving juice to raise blood glucose