OBT OBT Equipment & Technology 1 — Questions and Answers
Question 1: What is the primary purpose of a beam collimator in optical beam therapy equipment?
- To amplify laser power output
- To shape and direct the optical beam to the target area (Correct answer)
- To convert electrical energy into heat
- To measure tissue resistance
Correct answer: To shape and direct the optical beam to the target area
A beam collimator shapes and directs the optical beam precisely to the intended treatment target area.
Question 2: Which parameter is most critical to verify during routine calibration of an OBT device?
- Device color and finish
- Output power or irradiance (Correct answer)
- Speaker volume of the unit
- Weight of the handpiece
Correct answer: Output power or irradiance
Output power or irradiance must be verified during calibration to ensure therapeutic doses are accurate and safe.
Question 3: What does the term 'duty cycle' refer to in pulsed optical beam therapy devices?
- The total lifespan of the device in hours
- The ratio of on-time to total cycle time for a pulsed beam (Correct answer)
- The maximum continuous output power rating
- The number of treatments completed per session
Correct answer: The ratio of on-time to total cycle time for a pulsed beam
Duty cycle describes the proportion of time a pulsed beam is active relative to the total pulse period.
Question 4: Which of the following best describes a class IV laser as classified by the FDA?
- A low-power device safe for direct eye viewing
- A high-powered device capable of causing injury to skin and eyes (Correct answer)
- A device limited to non-clinical educational use only
- A device that emits only non-coherent light
Correct answer: A high-powered device capable of causing injury to skin and eyes
Class IV lasers are high-powered devices that can cause serious injury to the eyes and skin even from indirect reflections.
Question 5: What is the function of an optical fiber delivery system in OBT equipment?
- To store electrical charge for the laser diode
- To transmit optical energy from the source to the treatment handpiece (Correct answer)
- To amplify the wavelength of emitted photons
- To cool the patient's skin during treatment
Correct answer: To transmit optical energy from the source to the treatment handpiece
Optical fiber delivery systems guide laser or light energy from the source unit to the handpiece used at the treatment site.
Question 6: Which maintenance task should be performed before each clinical use of an OBT device?
- Replace the internal laser diode
- Inspect the handpiece and fiber optic cable for damage (Correct answer)
- Reprogram the device firmware
- Disassemble and lubricate all moving parts
Correct answer: Inspect the handpiece and fiber optic cable for damage
Inspecting the handpiece and fiber optic cable for damage before each use helps prevent equipment failure and patient injury.
OBT OBT Equipment & Technology 1
What is the primary purpose of a beam collimator in optical beam therapy equipment?