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Core Mock Exams > Core Mock Exam > Flashcards

Core Mock Exam Flashcards

1
Q

Medical Term for dizziness

A

Vertigo

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2
Q

When using indirect conversion DR System ,the light in the flat-panel detector is converted to an electrical signal by the

A

Photodiode

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3
Q

Noise on a digital image is the summation of inherent electron system noise and quantum noise .Of these two,the radiographer can improve the noise on an image by

A

Increasing the exposure technique

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4
Q

Which of the following transformers reduces the voltage on the secondary side to provide an appropriate current to heat the filament

A

Step-Down Transformers

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5
Q

The unit of Potential Difference is the

A

Volt

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6
Q

The unit of Resistance is

A

Ohm

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7
Q

The unit of Current is

A

Ampere

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8
Q

As a general rule,a grid should be employed when the part thickness is greater than

A

10 cm

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9
Q

Which of the following are types of technique charts

A

Variable kVp and Fixed kVp

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10
Q

Which of the following imaging modalities does not use ionizing radiation to produce the image

A

Sonography

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11
Q

A series of warm up exposures is made on a cold x-ray tube to:

A

Prevent damage to the anode form sudden heating

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12
Q

Which of the following changes decreases the dose to the limited operator:

A

1.Minimize the time spent in the radiation area 2.Increase distance between operator and source to radiation 3.Use shielding (control booth and lead apparel)

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13
Q

If an exposure time is measured as 35 milliseconds ,what is the exposure time in seconds:

A

0.035 seconds

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14
Q

The artifact that will occur when the grid lines are not aligned with the CR readers laser light is:

A

Moire Pattern

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15
Q

Free electrons at the cathode that are used for x-ray production come from the:

A

Filament

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16
Q

A “Cassettee-based” digital imaging system is termed:

A

Computed Radiography (CR)

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17
Q

The ability to distinguish anatomical structures of similar subject contrast is termed :

A

Contrast Resolution

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18
Q

In radiology ,80,0000 volts is converted to:

A

80 KVp

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19
Q

If there is a fire in your immediate area,the first thing you should do is:

A

Evacuate the area

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20
Q

Of the choices below,the greatest ALARA violation would be:

A

Repeating an image with an S number of 210 because of exposure technique

21
Q

Test tools for focal spot size estimation include each of the following except-

A

Motorized Synchronous Top

22
Q

A gonad shield should be used whenever the edge of the radiation field is within of the gonads:

A

5 cm

23
Q

The most widely used and most accurate personnel monitor is the-

A

Optically Stimulated Luminescence (OSL)

24
Q

A 28 year old radiation worker can have an annual cumulative effective dose of-

A

280 mSv

25
Q

Which control on the viewing station can blacken out the clear or white areas around the collimation edges of a radiograph-

A

Shuttering

26
Q

The device that is placed between the patient and the IR to absorb scatter radiation is called a-

A

Grid

27
Q

The purpose of the photostimulable phosphor plate is to-

A

Store the image of the body part until processed

28
Q

The current across the X-Ray tube is measured in units of-

A

Milliamperes

29
Q

Which of these statements is true -

A

If the KVp increases ,the scatter radiation fog increases

30
Q

The penetrating power of an X-ray beam is determined-

A

By its energy as expresses in its wavelength

31
Q

The process of reducing the probability of infection or organisms being transmitted to a susceptible individual is called-

A

Asepsis

32
Q

Which of the following are the types of radiation produced in the anode-

A

Characteristics and Bremsstralung

33
Q

What is Erythema-

A

Reddening of the skin caused by high dose of radiation

34
Q

What is the normal range of temperature when measured orally-

A

96.8 to 99.6 degrees

35
Q

How is the wavelength of a sine wave measured-

A

The distance from one crest to the next crest

36
Q

The anode heel effect is a phenomenon of X-Ray production that results in-

A

Uneven distribution of radiation within the field

37
Q

Which control on the viewing station controls the density or brightness in the radio graphic images-

A

Window level

38
Q

The auto transformer is primarily used for -

A

Variable kVp selection

39
Q

The accuracy of three-phase generator time settings can be measured with a -

A

Motorized synchronous spinning top test

40
Q

The radiation weighing factor for X-Ray photons is,which of the following-

A

1

41
Q

The number of gray shades that a digital system can reproduce is termed-

A

Dynamic Range

42
Q

What is Sepsis-

A

A serious condition resulting from the presence of harmful microorganisms in the blood or other tissues and the body response to their presence ,potentially leading to the malfunctioning of various organs,shock or death

43
Q

Appears because of insufficient exposure to IP and by low mA or low kVp,images will have a grainy,or sandlike appearance

A

Quantum mottle

44
Q

Occurs when the grid lines are not aligned with the laser scanning frequency of CR reader

A

Moire Pattern

45
Q

May appear as a result of incomplete IP erasure and can lead to incorrect diagnosis-

A

Phantom or ghost images

46
Q

Is used to blacken out the white collimation borders

A

Electronic cropping also known as masking or shuttering

47
Q

Is a plot between frequencies of occurrence versus the digital value of each pixel
A graph of the minimum and maximum signals in the image

A

Histogram

48
Q

Creates a radiograph image by converting x-rays energy into a digital image electronic signal-

A

Digital Radiography (DR)

Core Mock Exams (1 decks)

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