Question 1

Fluoroscopic equipment should be inspected every:

Accepted Answer

According to the guidelines of the Joint Commission on Accreditation of Healthcare Organizations (JCAHO), fluoroscopic equipment should be inspected at least every 6 months. This is to ensure the proper functioning of the equipment and to prevent unnecessary radiation exposure to patients and staff.

Question 2

Which of the following produces an image with more noise?

Accepted Answer

Tube-type cameras produce more noise due to the physical design of the camera technology. CCDs have better signal-to-noise ratio and therefore produce less noise.

Question 3

Which of the following requires more radiation to produce quality fluoroscopic images?

Accepted Answer

The flat-panel detector is capable of reducing the radiation dose during fluoroscopy by as much as 50%.

Question 4

The newest fluoroscopy systems use a flat-panel detector:

Accepted Answer

The newest fluoroscopy systems use a flat-panel detector in place of the image intensifier, as it provides better image quality, lower radiation dose, and larger field of view.

Question 5

Which of the following has a rectangular field of view and a wider dynamic range?

Accepted Answer

Flat-panel detectors have a rectangular field of view and wider dynamic range compared to conventional image intensifiers.

Question 6

Digital fluoroscopy is improved by using:

Accepted Answer

CCD (charge-coupled device) technology is superior to vidicon cameras and videotape. A beam splitting mirror may be used in conjunction with a CCD to improve the image further, but on its own, it does not improve digital fluoroscopy.

Question 7

Flat-panel detectors for fluoroscopic imaging can be the:

Accepted Answer

Both amorphous silicon indirect capture and amorphous selenium direct capture types are commonly used in flat-panel detectors for fluoroscopic imaging. The photostimulable phosphor plate type is used in computed radiography, not in flat-panel detectors. Therefore, the best choice is D.

Question 8

The analog to digital converter:

Accepted Answer

An analog to digital converter (ADC) converts analog signals into digital data, making them understandable to computers, and it plays a role in determining the contrast resolution and image matrix in imaging systems.

Question 9

The radiographer may be responsible for the ________________ inspection of the fluoroscopic equipment for QC purposes.

Accepted Answer

The answer of The radiographer may be responsible for the...

Question 10

Which of the following does not require any additional devices for spot filming during the fluoroscopic procedure?

Accepted Answer

Using a flat-panel detector in place of an image intensifier does not require any additional devices for spot filming during the fluoroscopic procedure.

Question 11

Use of which of the following systems will result in less radiation dose to the patient?

Accepted Answer

CCD (Charge-Coupled Device) results in less radiation dose to the patient compared to a tube-type camera because CCD sensors are more sensitive and efficient in converting X-rays into digital signals, requiring less exposure time and thus less radiation dose to the patient.

Question 12

The x-ray beam used with a digital fluoroscopic unit uses ___________ mA and a ______________ beam.

Accepted Answer

The digital fluoroscopic unit uses a high mA and a pulsed beam to reduce radiation exposure to the patient while still producing high-quality images.

Question 13

As compared to the tube-type camera, the CCD:

Accepted Answer

The CCD (Charge-Coupled Device) is smaller than tube-type cameras and does not use an electron gun to produce the video signal.

Question 14

Which of the following is more light-sensitive?

Accepted Answer

CCDs are more light-sensitive than tube-type cameras because they are able to convert more photons into electrical signals. They are also able to capture images in low light conditions without the need for additional light sources.

Question 15

The SSD should be no less than ___________ for a fixed or stationary fluoro unit and no less than ____________ for a mobile fluoro unit.

Accepted Answer

For a fixed or stationary fluoroscopy unit, the Source-to-Skin Distance (SSD) should be no less than 38 cm, and for a mobile fluoroscopy unit, it should be no less than 30 cm.

Question 16

Inspecting the protective curtain, Bucky slot cover, and fluoroscopic timer are part of the:

Accepted Answer

Operational QC testing involves routine checks and inspections of equipment components like the protective curtain, Bucky slot cover, and fluoroscopic timer to ensure they are functioning properly.

Question 17

Which of the following has the possibility of demonstrating veiling glare and pincushion distortion?

Accepted Answer

Conventional image intensifiers have a curved input phosphor and an output screen, which can cause veiling glare and pincushion distortion. Flat-panel detectors do not have this issue.

Question 18

In comparison, the vidicon camera tube has ______________ spatial resolution, and the CCD requires ________________ radiation to produce a good fluoroscopic image.

Accepted Answer

The vidicon camera tube has less spatial resolution than the CCD. The CCD requires less radiation to produce a good fluoroscopic image.

Question 19

Which of the following has more spatial distortion?

Accepted Answer

Tube-type cameras have more spatial distortion than CCDs because they use an electron beam to scan the image, which can cause variations in the intensity of the signal and distortions in the image. CCDs, on the other hand, use a grid of light-sensitive elements to capture the image, resulting in less distortion.

Question 20

Which of the following is easier to move around and allows better access to the patient during a procedure?

Accepted Answer

Flat-panel detectors are lighter and more compact than conventional image intensifiers, making them easier to move around. They also have a larger field of view and can be positioned closer to the patient, providing better access during procedures.

Quiz 10: Dynamic Imaging: Fluoroscopy