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Questions and Answers

What is the purpose of septa in PET imaging?

  • To detect true coincidences
  • To produce positron emitters
  • To reduce random and scatter events from adjacent rings (correct)
  • To label deoxyglucose

What is the half-life of the main positron emitter used in PET imaging?

  • 68 minutes
  • 110 minutes (correct)
  • 10 minutes
  • 1 minute

What type of events can occur in PET imaging?

  • True, random, and scattered events (correct)
  • Only random coincidences
  • Only scattered events
  • Only true coincidences

Why are PET images fused with CT or MRI images?

<p>To locate and visualise functional information within the patient’s anatomy (C)</p> Signup and view all the answers

What is the purpose of detectors in PET imaging?

<p>To detect coincidences (D)</p> Signup and view all the answers

What is the purpose of radionuclide generator in PET imaging?

<p>To produce other useful radionuclides (A)</p> Signup and view all the answers

What type of information do gamma images provide?

<p>Functional and physiological information (A)</p> Signup and view all the answers

Which organs generally receive the highest doses after an intravenous injection?

<p>Organs of interest and excretion (B)</p> Signup and view all the answers

What is the unit of the effective dose?

<p>Sievert (Sv) (A)</p> Signup and view all the answers

What is the purpose of the tissue-weighting factor (WT)?

<p>To weight each organ absorbed dose to produce an equivalent dose (D)</p> Signup and view all the answers

What is the typical effective dose of most nuclear medicine investigations?

<p>Less than 5mSv (B)</p> Signup and view all the answers

Which type of imaging delivers doses in the region of 5mSv?

<p>Bone and static brain imaging (B)</p> Signup and view all the answers

What is the effective dose (E) calculated from?

<p>The differing sensitivities of the various organs and tissues to irradiation (B)</p> Signup and view all the answers

Why is the effective dose (E) calculated?

<p>To give a measure of risk (D)</p> Signup and view all the answers

What is the purpose of imaging with 67Ga?

<p>Tumour or abscess imaging (D)</p> Signup and view all the answers

What is the typical activity of Technetium-99m diphosphonates for bone imaging?

<p>600 MBq (D)</p> Signup and view all the answers

What is the effective dose of Lung ventilation imaging with Technetium-99m DTPA aerosol?

<p>0.1 mSv (C)</p> Signup and view all the answers

What is used to check the accuracy of the dose calibrator?

<p>A reasonably long-lived source, such as 57Co (D)</p> Signup and view all the answers

What is the purpose of placing the vial in the 'well' of a large re-entrant ionisation chamber?

<p>To check and record the activity before administration (C)</p> Signup and view all the answers

What is the effective dose of Heart imaging with Technetium-99m MIBI?

<p>18 mSv (D)</p> Signup and view all the answers

What is the typical activity of Gallium-67 citrate for infection imaging?

<p>150 MBq (D)</p> Signup and view all the answers

What should patients do to minimize their dose?

<p>Drink a good deal of water and empty the bladder frequently (D)</p> Signup and view all the answers

Why should female patients avoid conception for a certain period after administration of long-lived diagnostic radionuclides?

<p>To minimize the dose to the fetus (B)</p> Signup and view all the answers

What advice should be given to male patients?

<p>No particular advice is needed (C)</p> Signup and view all the answers

Why should certain examinations be avoided if a female patient is or may be pregnant?

<p>To minimize the dose to the fetus (C)</p> Signup and view all the answers

What should a breast-feeding mother do when undergoing a diagnostic examination?

<p>Interrupt breast-feeding for a certain period (B)</p> Signup and view all the answers

Why is it important to handle radionuclides carefully?

<p>To avoid internal radiation due to accidental ingestion or inhalation of the radionuclide (D)</p> Signup and view all the answers

What should be controlled when handling radionuclides?

<p>The spread of radioactive materials to the environment, workplace, and persons (C)</p> Signup and view all the answers

What is the purpose of using long-handled forceps in handling radionuclides?

<p>To reduce radiation doses to the fingers (C)</p> Signup and view all the answers

What is the purpose of a lead barrier in handling radionuclides?

<p>To reduce radiation doses to the body and face (A)</p> Signup and view all the answers

What is the purpose of tungsten or lead glass sleeves on syringes?

<p>To reduce radiation doses to the fingers (B)</p> Signup and view all the answers

Why are syringes vented into swabs or closed containers?

<p>To reduce radiation doses to the atmosphere (B)</p> Signup and view all the answers

Why are waterproof surgical gloves worn when handling radionuclides?

<p>To reduce radiation doses to the skin (C)</p> Signup and view all the answers

Why is it important to cover cuts and abrasions when handling radionuclides?

<p>To reduce radiation doses to the skin (B)</p> Signup and view all the answers

Why is it important to monitor hands and work surfaces for radioactive contamination?

<p>To detect radioactive contamination (B)</p> Signup and view all the answers

Why is it important to monitor the air in radiopharmacies?

<p>To detect radioactive contamination in the air (A)</p> Signup and view all the answers

Why are staff monitored for internal contamination?

<p>To detect internal radioactive contamination (B)</p> Signup and view all the answers

Why are swabs taken from the radiopharmacy workstation?

<p>To monitor for radioactive and bacterial contamination (C)</p> Signup and view all the answers
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