RAD 231:QC/IA

Fluoroscopy

100

In a fluoroscopic system, high contrast resolution allows the tests the systems ability to display details of ...... objects.

(A.)  Large

(B)  Small

Small objects

200

ABC performance in Fluoroscopic equipment evaluates image quality for changes in exposure parameters such as:

(A) high dose rate

(B) pulsed modes

(C) FOV (field of view)

(D) A & B

(E) A, B, C 

E.  A, B, & C

300

This evaluates quality of the displayed fluoroscopic image, including image distortion or lag.

A. Exposure Rates

B. Alignment Tests

C.  Phantom Image quality

C.  Phantom image quality

400

Alignment tests ensures the radiation beam aligns with the center of the image intensifier within ____% of the SID.

A.1%

B. 2%

C. 3%

B.  2%

500

This evaluates proper function of patient dose monitoring systems such as DAP meters.

A. Phantom Image quality

B. Exposure Rates

C.  Patient dose monitoring system calibration (if present)

C.  Patient Dose monitoring system calibration

Fluoroscopy

100

When parked at foot of the table, metal cover should expand and cover the entire opening.

A. bucky slot cover

B.  protective curtain

C.  collimator shutters

A. bucky slot cover

200

Operates the x-ray tube only while in depressed mode

Exposure Switch (deadman switch)

300

Collimator shutters in the fully open position should restrict the beam to the size of the input phospher and be accurate to within +/- ____% variance.

(A)  1%

(B)  2%

(C) 3%

C - 3%

400

Fluoro timer should buzz audibly after ___ mins of "beam-on" time.

5 mins.

500

While exposing a penetrometer through a fluoro phantom, the monitor image is adjusted to display as many of the penetrometer steps as possible. 

This is

Monitor brightness

AEC/Grids

100

This should provide consistent densities for variations in exposure factors, patient thicknesses, and detector selection.

AEC

200

Several Aspects of the AEC performance can be monitored with a densitometer by imagining a homogenous patient-equivalent phantom plus additional thickness plates.

True or False

True

300

Consistency of exposures with varying mA, kVp, part thickness, and detector selection can be evaluated individually and in combination by imaging the phantom and measuring the resultant densities.  Optical densities should be within +/- ___ for proper performance of the AEC device.

Reproducibility of exposures for a given set of exposure factors and selected detectors should result in optical densities within +/- ____.

Part 1 Q. 

(A) 0.1

(B) 0.2

Part 2 Q.

(A)  0.1

(B) 0.2

Part 1:  (B) 0.2

Part 2:  (A) 0.1

400

nonuniformity of a grid (lack of uniform lead strips) may create ____ on the image

artifacts

500

Grid uniformity can be easily evaluated by imaging a grid and measuring optical densities throughout the image.  Optical density readings should be within +/- ____ for proper uniformity.

A.  0.10

B. 0.20

C. 0.30

A. 0.10

Collimator/beam alignment

100

A collimator and beam alignment test tool template and cylinder can be easily radiographed and evaluated for proper....

Alignment

200

Collimator misalignment should be less than ____% of the SID used; and the perpendicularity of the x-ray CR must not be misaligned more than ___ degree(s).

A.  1%; 1 degree

B.  2%; 1 degree

C.  1%; 2 degree

D.  2%; 2 degree

B.  2%; 1 degree

300

With digital imaging systems, spatial resolution can be monitored by imaging a __________ test tool.

line-pair resolution

400

QC test devices for evaluating the performance of the display monitor include what two test patterns?

AAPM TG18-QC test pattern

SMPTE test pattern

500

The DICOM Grayscale Standard Display Function (GSDF) as recommended by the AAPM Task Group 18 should not vary by more than ____%

(A) 1%

(B) 5%

(C) 10%

C - 10%

KV/Timer accuracy

100

QC Check for kVp accuracy maximum variability of the kV is +/- ____%

5%

200

QC check for timer accuracy uses two testing devices.  What are they?  Which one is used on HF or Three phase equipment?

Spinning top test device and 

Synchronous spinning top test timer

part b:  Synchronous.

300

The maximum variability of the exposure timer is:

A. greater than 10ms 

B.  Less than 10 ms

A.  +/- 5%

B.  +/- 10%

400

QC check on radiation output involves the use of a dosimeter to evaluate the radiation output by measuring the radiation intensity. What are the 3 QC tests used with a dosimeter to evaluate radiation output by measuring radiation intensity?

Exposure reproducibility

mAs reciprocity  

mA & exposure time linearity

500

Radiation output QC test

This verifiies the consistency of the radiation output for a given set of exposure factors

What is the maximum variability of the reproducibility of radiation exposures +/- ___%

Reproducibility of exposure

5%