FREE RADIOLOGY AND STUDY GAMES ABOUT CH 10

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FREE RADIOLOGY AND STUDY GAMES ABOUT CH 10

IMAGE QUALITY EXAM QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -86 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation Question 1: _____ is a reduction is image size; related to the angle of inclincation of the object.

Answer:

Forshortening Question 2: Fast image receptors have ___ noise and ____ spatial resolution and ___ contrast resolution.

Answer:

high; low; low Question 3: Contrast media are effective because they accentuate subject contrast through _____ absorption.

Answer:

photoelectric Question 4: A low kVp results in high subject contrast, sometimes called ___ gray scale.

Answer:

short (few shades of gray)

Question 5: Radiographic contrast formula?

Answer:

Radiographic contrast = IR contrast x subject contrast

Question 6: ____ is the most important influence of subject contrast.

Answer:

kVp Question 7: The degree of subject contrast is ______ proportional to the relative number of x-rays leaving those sections of the body.

Answer:

directly Question 8: Use of intensifying screens decreases patient dose by a factor of ___.

Answer:

20 Question 9: The reciprocity law fails for screen-film exposures at exposure times less than approximately ___ ms or longer than ___ seconds.

Answer:

10; 2

Question 10: Base plus fog OD has a range of approximately ___ to ___.

Answer:

0.1; 0.3

Question 11: _____ refers to the degree of sharpness of structural lines on a radiograph.

Answer:

Detail (recorded detail)

Question 12: Focal spot blur is decreased when ___ is decreased.

Answer:

OID

Question 13: High spatial resolution and high contrast resolution require ___ noise and slow image receptors.

Answer:

low Question 14: The contrast of a radiograph viewed on an illuminator is called ____ contrast.

Answer:

radiographic Question 15: ____-____ blur is the blurred region on the radiograph which the technologist has littl control.

Answer:

Focal-spot (occurs because the focal spot is not a point)

Question 16: ____ density is the OD that is inherent in the base of the film.

Answer:

Base (value of 0.1) Question 17: The focal-spot blur is ____ on the anode side and ____ on the cathode side of the image.

Answer:

small;large Question 18: The ability of an IR to respond to a low x-ray exposure is a measure of its _____.

Answer:

speed (or sensitivity) Question 19: Focal spot blur is the most important factor for determining _____ _____.

Answer:

spatial resolution Question 20: The characteristic curve is a digital representation between ___ and ______.

Answer:

OD; exposure

Question 21: Thick objects are more ____ than thin objects.

Answer:

distorted

Question 22: Four factors that may affect the finished radiograph?

Answer:

concentration of processing chemicals, degree of chemistry agitatoin during development, development time/temperature Question 23: The high atomic numbers of iodine(53) and barium(56) result in ____ subject contrast.

Answer:

increased

Question 24: What is the magnification factor formula?

Answer:

MF=Image size/object size

MF=SID/SOD

Question 25: What are the three interrelated characteristics of radiographic quality?

Answer:

resolution, noise and speed Question 26: Film contrast is related to the ___ of the straigh line portion of the chacteristic curve.

Answer:

slope (a curve with a greater slope will have greater contrast) Question 27: Most radiographic IR's have an average gradient in the range of ___ to ___.

Answer:

2.5; 3.5

Question 28: As kVp is increased, both the ____ and ____ of radiation are increased.

Answer:

quantity; quality