Radiographic image formation MCQs

What is the primary source of radiation used in conventional radiography?
- A) X-rays
- B) Gamma rays
- C) Alpha particles
- D) Beta particles
What is the role of the radiographic film in image formation?
- A) To emit radiation
- B) To capture the X-ray image
- C) To amplify the radiation
- D) To filter the radiation
Which of the following components is essential in a radiographic system to convert X-rays into visible light?
- A) Image intensifier
- B) Collimator
- C) Scintillator
- D) Photomultiplier tube
What is the purpose of using a grid in radiography?
- A) To increase exposure time
- B) To reduce scatter radiation
- C) To enhance image contrast
- D) To minimize patient dose
What phenomenon causes the contrast in radiographic images?
- A) Absorption of radiation
- B) Differential attenuation of X-rays
- C) Scattering of radiation
- D) Image processing
What is the term for the degree of blackening on a radiographic film?
- A) Contrast
- B) Density
- C) Resolution
- D) Sharpness
Which of the following factors affects the quality of a radiographic image?
- A) Kilovolt peak (kVp)
- B) Exposure time
- C) Film speed
- D) All of the above
What does the term “collimation” refer to in radiography?
- A) Limiting the area of exposure
- B) Increasing radiation intensity
- C) Reducing patient movement
- D) Enhancing image resolution
In digital radiography, what is the role of a photostimulable phosphor (PSP)?
- A) To produce X-rays
- B) To store and release latent images
- C) To enhance contrast
- D) To reduce patient dose
What is the purpose of processing in radiographic imaging?
- A) To increase radiation exposure
- B) To convert latent images into visible images
- C) To enhance the quality of X-rays
- D) To reduce film speed
Which of the following factors can increase the sharpness of a radiographic image?
- A) Shorter focal spot size
- B) Increased patient movement
- C) Longer exposure time
- D) Higher kVp
What is the primary difference between film-based and digital radiography?
- A) The type of radiation used
- B) The method of image capture and processing
- C) The exposure time
- D) The quality of images produced
Which component of a radiographic system helps focus the X-ray beam?
- A) Tube housing
- B) Collimator
- C) Image receptor
- D) Grid
In X-ray imaging, what does “magnification” refer to?
- A) Increasing the exposure time
- B) Enlargement of the image compared to the actual size
- C) Enhancement of image contrast
- D) Improvement of spatial resolution
What is the effect of increasing the kilovolt peak (kVp) on image contrast?
- A) Decreases contrast
- B) Increases contrast
- C) No effect
- D) Increases image density only
What is the function of the darkroom in film radiography?
- A) To develop digital images
- B) To process and develop radiographic films
- C) To enhance image quality
- D) To store X-ray machines
Which type of image receptor is used in computed radiography (CR)?
- A) Photostimulable phosphor plates
- B) Film-screen systems
- C) Digital sensors
- D) Ionization chambers
What is the primary benefit of digital radiography over traditional film-based radiography?
- A) Immediate image availability
- B) Lower radiation dose
- C) Higher image quality
- D) All of the above
What does the term “dynamic range” refer to in digital radiography?
- A) The range of motion of the X-ray tube
- B) The range of exposures that can be accurately captured
- C) The variety of imaging modalities
- D) The contrast between tissues
What is the purpose of using a high-speed film in radiography?
- A) To reduce exposure time
- B) To increase image contrast
- C) To enhance image detail
- D) To minimize patient dose
What is the main disadvantage of using high kVp settings in radiography?
- A) Increased patient dose
- B) Decreased image contrast
- C) Longer exposure times
- D) More scatter radiation
In film radiography, what does “fog” refer to?
- A) Excessive exposure to radiation
- B) Unwanted density on the film
- C) Lack of contrast
- D) Improved image quality
What is the role of an anti-scatter grid in radiography?
- A) To absorb scattered radiation
- B) To enhance image brightness
- C) To increase radiation exposure
- D) To focus the X-ray beam
What effect does increasing the distance between the X-ray source and the film have on image quality?
- A) Increases magnification and decreases sharpness
- B) Decreases magnification
- C) No effect
- D) Increases sharpness
Which factor is NOT a part of the image formation process in radiography?
- A) Image processing software
- B) X-ray generation
- C) Image capture
- D) Radiation absorption
What is the significance of the S-number in digital radiography?
- A) It measures radiation dose
- B) It indicates image sharpness
- C) It relates to image exposure level
- D) It determines image processing speed
What does the term “spatial resolution” refer to in radiography?
- A) The ability to distinguish between different tissues
- B) The smallest detail that can be seen in an image
- C) The overall brightness of the image
- D) The contrast between light and dark areas
Which device is used to measure radiation dose in radiographic systems?
- A) Collimator
- B) Dosimeter
- C) Grid
- D) Intensifying screen
What is the primary purpose of using an intensifying screen in film radiography?
- A) To increase exposure time
- B) To convert X-rays into visible light
- C) To enhance image sharpness
- D) To reduce patient dose
What is the primary advantage of using digital subtraction angiography (DSA)?
- A) Enhanced visualization of blood vessels
- B) Increased radiation dose
- C) Simpler imaging process
- D) Lower cost

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