FREE RADIOLOGY AND STUDY GAMES ABOUT RADT 465

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FREE RADIOLOGY AND STUDY GAMES ABOUT RADT 465

UNIT 2 EXAM QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -51 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation Question 1: What will improve the spatial resolution of image-intensified images?

Answer:

A very thin input phosphor layer pg. 218

Question 2: What is geometric sharpness inversely influenced by?

Answer:

OID pg. 168

Question 3: What are results of a decrease in kilovoltage?

Answer:

Decrease in photon energy & receptor exposure pg. 171

Question 4: What is subject contrast related to?

Answer:

Differential tissue absorption & atomic number of tissue being traversed pg. 172

Question 5: How does image resolution improve?

Scintillation increases DEL size decreases Fill factor increases

Answer:

DEL size decreases & fill factor increases pg. 175

Question 6: What is an algorithm?

Answer:

A series of variable instructions pg. 167

Question 7: What is the primary function of x-ray beam filtration?

Answer:

Reduce patient skin dose pg. 171

Question 8: What can grid interspace be made of?

Answer:

Aluminum & plastic fiber pg. 224 Question 9: Which pathologic condition would require a decrease in exposure factors?Osteomyelitis Osteoporosis Osteosclerosis Osteochondritis

Answer:

Osteoporosis pg. 167

Question 10: Decreasing what will improve spatial resolution/detail sharpness?

Answer:

OID and patient/part motion pg. 172

Question 11: Which has the greatest affect on radiographic IR exposure?

Aluminum filtration kV SID Scattered radiation

Answer:

SID pg. 172

Question 12: What contributes to inherent filtration?

Answer:

X-ray tube glass envelope & X-ray tube port window pg. 221 Question 13: What enables the radiographer to reduce the exposure time required for a particular image?Use of a higher mA Use of a higher kV Use of a higher ratio grid

Answer:

Use of a higher mA & use of a higher kV pg. 176 Question 14: _____ determines the fixed spatial resolution characteristic of direct digital systems.

Answer:

TFT and DEL size pg. 167

Question 15: What is x-ray photons energy inversely related to?

Answer:

Photon wavelength pg. 170

Question 16: Unsharp edges of tiny radiographic details is called what?

Answer:

Blur pg. 218 Question 17: Which of the following does not affect the exposure rate of the primary beam?mA kV distance field size

Answer:

Field size pg. 172 Question 18: Known as equalization, the digital imaging processing function is/does what?

Answer:

Is a computer software operation, removes densities that veil image details, and compresses the contrast scale pg. 217

Question 19: What are required corrections done to "raw" image data that occur because of inherent flaws in the image acquisition system called?

Answer:

Preprocessing pg. 226

Question 20: The result of digital imaging subject contrast is

Answer:

Signal differences within the remnant beam pg. 221 Question 21: When a high-speed electron slows down as it becomes attracted to a tungsten atom nucleus.

Answer:

Bremsstrahlung radiation pg. 220

Question 22: To have the same FOV, once the matrix size increases

Spatial resolution increases Image quality increases Pixel size decreases

Answer:

spatial resolution increases, image quality increases, and pixel size decreases pg. 175 Question 23: What's the total number of x-ray photons produced at the target depend on?

Answer:

Tube current, target material & square of the kilovoltage pg. 218 Question 24: As ______ decreases, spatial resolution in compound radiography increases.

Answer:

PSP crystal size decreases & laser beam size decreases pg. 223 Question 25: What controls the subject contrast of the exit/remnant signal in digital imaging?

Answer:

Kilovoltage & Photon energy pg. 167