PET Didactic Test Out

Which of the following instructions should be given to patients after administration of F-18 FDG PET imaging?

a) The patient may leave the imaging area and return in approximately 90 min.

B) The patient may read or watch television until imaging begins

C) The patient should consume a fatty meal to clear excess tracer from the hepatobiliary system.

D) The patient should rest quietly in a designated waiting area until imaging begins.

D) The patient should rest quietly in a designated waiting area until imaging begins.

Property of PET detectors that allows them faster timing signals for coincidence detection and to work at high counts rates is called _________.

The stopping power

Standardized uptake value (SUV) measurements are performed on _________.

Attenuation-corrected (AC) images only

Ovarian uptake of F-18 FDG in a postmenopausal patient indicates ________.

Malignancy

Which of the following radionuclides commonly used in PET imaging has the highest energy?

A) Fluorine-18

B) Rubidium-82

C) Carbon-11

D) Nitrogen-13

B) Rubidium-82

Daily quality control checks on the PET scanner should be performed __________.

Before the patient is injected

When monitoring response to treatment with PET-FDG imaging, it is essential to obtain a(n) ________.

Baseline PET-FDG scan

Which of the following is a cyclotron produced positron-emitting radionuclide?

A) Rubidium-82

B) Nitrogen-13

C) Technetium-99m

D) Copper-62

B) Nitrogen-13

The pattern of F-18 FDG uptake in the bowel most likely associated with a neoplastic process can be described as ______.

Focal

One disadvantage of nuclear medicine study over a PET-FDG study in infection and inflammation imaging lies in its ____ ________.

Low resolution

The use of a low-dose CT scan in place of a conventional PET transmission scan _____________.

improves accuracy of the scan interpretation

PET images that are distinguished by "hot skin" and the manifestation of the lungs with high tracer uptake and the low tracer concentrations in the mediastinum are _________.

Non-attenuation-corrected (NAC) images

In preparation for F-18 fluorodeoxyglucose (FDG) imaging, patient are required to fast to _________.

maximize tumor uptake

Which of the following scintillators is commercially available in a time-of-flight (TOF) PET scanner?

A) BGO

B) GSO

C) LSO

D) NaI(TI)

C) LSO

CT and PET scans demonstrate different aspects of disease indicating regions with _________.

altered metabolism (PET) and areas of structural change (CT)

A dose of F-18 FDG is calibrated to have 14 mCi at 12:00PM. How many millicuries of F-18 FDG will remain at 12:40PM?

A) 2.6 mCi

B) 18 mCi

C) 19.6 mCi

D) 11 mCi

D) 11mCi

Preparation of patients undergoing PET imaging for an oncologic clinical indication includes all of the following EXCEPT _________.

A) 12-lead ECG monitoring

B) checking blood glucose levels

C) installation of an IV

D) hydration

A) 12-lead ECG monitoring

After completion of the F-18 FDG study, the patient's fluid intake _______.

should be continued

In the PET/CT acquisition, the CT component is performed for _________.

Attenuation correction

All of the following interventions can be used to reduce urinary tract F-18 activity EXCEPT _________.

A) patient hydration

B) furosemide administration

C) foley catheter placement

D) Valium administration

D) Valium administration

An oncology patient referred for a positron emission tomography scan should fast prior to their appointment for a minimum of ________.

4 hours

When septa separate each crystal ring and coincidences are only recorded between detectors within the same ring and/or in closely neighboring rings the data are acquired ________.

In 2D mode

The main source of potential radiation hazard to a breastfeeding infant of the postpartum woman undergoing a FDG PET scanning is from ________.

proximity to the breast

The property of the scintillation detector described as the number of scintillations produced by each incident photon is called ________.

light output

Why do we check a patient's blood glucose level before F-18 FDG administration?

Hyperglycemia reduces tumor uptake of the tracer

F-18 FDG-PET is considered as a superior modality, compared with CT, for evaluating post-treatment response in lymphoma patients because of _______.

The ability to differentiate viable tumor from fibrosis

Which of the following substrates, under normal conditions, are the major sources of myocardial energy?

Free fatty acids and glucose

Dental fillings, hip prosthetics, or chemotherapy ports are examples of PET/CT imaging artifacts described as _________ artifacts.

metallic implant

Two photons arising from the same annihilation event and detected by two detectors within the coincidence time-window are ______.

true coincidences

The major limitation of PET in head and neck imaging is its _______.

poor spatial resolution

A breastfeeding patient referred for PET imaging should discontinue breastfeeding for how long after injection of the radiotracer?

12 hours

The initial diagnosis of melanoma is established by _______.

histologic evaluation

Which of the following is the correct order of scanning when a typical PET/CT protocol is applied?

A) Emission PET; transmission CT; topogram

B) Transmission CT; emission PET; topogram

C) Transmission CT; topogram; emission PET

D) Topogram; transmission CT; emission PET

D) Topogram; transmission CT; emission PET

Does extravasation at the antecubital injection site can cause ________.

Ipsilateral axillary node uptake

Which of the following scintillators commonly used in PET imaging has the highest stopping power?

A) BaF2

B) BGO

C) GSO

D) LSO

B) BGO

The pattern of F-18 FDG in the normal palatine and lingual tonsils is described as _________.

symmetrical and increased

A PET system's capacity to distinguish between two points after image reconstruction is called ________.

Resolution