Intraoperative Probe Spatial Resolution-CHAPTER 3

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

How are spatial resolution and sensitivity related for a given detector?

  • They are directly proportional
  • They are not related
  • They are inversely proportional (correct)
  • They are both constant

What factor affects spatial resolution in the context of an intraoperative probe?

  • Battery check
  • Detected activity
  • Scattering medium (correct)
  • Energy window setting

What is the purpose of verifying the energy window setting before using an intraoperative probe with multiple radionuclides?

  • To ensure proper operation (correct)
  • To affect spatial resolution
  • To improve sensitivity
  • To perform constancy testing

What is the recommended frequency for calibrating semiconductor detectors?

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

Which radionuclide is recommended for constancy testing of an intraoperative probe?

<p>Cobalt-57 (C)</p> Signup and view all the answers

What is the purpose of the amplifier gain tweaking during calibration?

<p>To correlate the energy window with the gamma ray photopeak energy (B)</p> Signup and view all the answers

Why is checking the energy window visually not feasible for most intraoperative probes?

<p>Unavailability of a multichannel analyzer display (A)</p> Signup and view all the answers

What problem might be indicated by a lower than expected constancy reading in intraoperative probes?

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

What is the purpose of extraneous radiation source in detector's line of sight troubleshooting procedure?

<p>To troubleshoot lower than expected constancy reading (B)</p> Signup and view all the answers

Why is it important to test the probe's performance annually?

<p>To ensure optimal function (B)</p> Signup and view all the answers

What effect does a scattering medium, such as tissue, have on spatial resolution in the context of an intraoperative probe?

<p>It degrades spatial resolution (B)</p> Signup and view all the answers

How are spatial resolution and sensitivity related for a given detector in the context of an intraoperative probe?

<p>They are inversely related (B)</p> Signup and view all the answers

What is the recommended radionuclide for constancy testing of an intraoperative probe, and why is it recommended?

<p>Cobalt-57, due to its photon energies being close to that of Tc-99m (A)</p> Signup and view all the answers

Why is it important to verify the energy window setting before using an intraoperative probe with multiple radionuclides?

<p>To ensure accurate detection of the targeted radionuclide (D)</p> Signup and view all the answers

What is the purpose of calibrating semiconductor detectors quarterly or semiannually?

<p>To ensure the energy window is correctly centered on the photopeak (C)</p> Signup and view all the answers

Why is it challenging to visually check the energy window of most intraoperative probes?

<p>The probes lack a multichannel analyzer display (D)</p> Signup and view all the answers

What problem might be indicated by a lower than expected constancy reading in intraoperative probes?

<p>Energy window not correctly centered on photopeak (B)</p> Signup and view all the answers

In the context of semiconductor detectors, what is the purpose of a daily constancy check?

<p>To maintain a consistent count rate capability (D)</p> Signup and view all the answers

Why are most intraoperative probes not equipped with a multichannel analyzer display?

<p>To reduce the complexity and cost of the probes (C)</p> Signup and view all the answers

What is the purpose of the recommended quality control test for checking battery daily in semiconductor probes?

<p>To maintain an optimal count rate capability (B)</p> Signup and view all the answers

What is the impact on spatial resolution if a scattering medium like tissue lies between the detector and the radiation source?

<p>It degrades spatial resolution (A)</p> Signup and view all the answers

What does the operator need to remember about the probe's 'view' of the patient's tissue?

<p>The probe 'sees' a solid column of tissue extending through the entire patient (D)</p> Signup and view all the answers

How are spatial resolution and sensitivity related for a given detector in the context of an intraoperative probe?

<p>They are inversely related; an improvement in sensitivity results in a degradation of spatial resolution (C)</p> Signup and view all the answers

What is the impact on spatial resolution and sensitivity if there is a change that improves sensitivity in a given detector?

<p>It degrades spatial resolution but improves sensitivity (A)</p> Signup and view all the answers

What is the purpose of calibrating semiconductor detectors quarterly or semiannually?

<p>To ensure the preset energy window correlates with the gamma ray photopeak energy (D)</p> Signup and view all the answers

Why are most intraoperative probes not equipped with a multichannel analyzer display?

<p>To make it challenging to visually check the energy window (D)</p> Signup and view all the answers

In the context of semiconductor detectors, what is the purpose of a daily constancy check?

<p>To verify that the energy window is correctly centered on the photopeak (C)</p> Signup and view all the answers

What problem might be indicated by a lower than expected constancy reading in intraoperative probes?

<p>Incorrect source-detector geometry (C)</p> Signup and view all the answers

What is the recommended radionuclide for constancy testing of an intraoperative probe, and why is it recommended?

<p>$^{99m}$Tc, because of its wide clinical use and availability (B)</p> Signup and view all the answers

Why is checking the energy window visually not feasible for most intraoperative probes?

<p>Because they lack a visual display for the energy window (D)</p> Signup and view all the answers

Flashcards are hidden until you start studying

More Like This

Intraoperative Awareness Quiz
10 questions
Reasons for Intraoperative Cholangiogram
8 questions
Intraoperative Nursing Management
5 questions
Use Quizgecko on...
Browser
Browser