Mamm Cht2 Flashcards
What is the frequency of ACR accreditation?
A) every year
B) every two years
C) every three years
D) every five years
C) every three years
The material used for the exit port of the mammography tube is necessary, because:
A) the intensity of the beam is less on the side than on the cathode side
B) regular glass would harden the emerging beam
C) the intensity of the beam is more on the side than on the cathode side
D) regular glass was softened the emerging beam
B) regular glass would harden the emerging beam
The intensity of the x-ray beam from the cathode side of the tube is generally higher because:
A) soft, characteristic radiation, emerges from the anode side
B) the cat side is directed to the thickest part of the breast
C) the heel effect, causes variation in the intensity of the x-ray beam
D) the heel effect, increases the intensity of the beam at the anode side
C) the heel effect, causes variation in the intensity of the x-ray beam
The design of the lip of the compression paddle (both height, and the angle along the chest wall) effects all the following except:
A) it prevents the posterior and auxiliary fat from overlapping the body of the breast
B) it allows uniform compression of the posterior breast tissue
C) it helps increasing the structural strength of the compression paddle
D) it ensures higher compression of the interior breast tissue
D) it ensures higher compression of the interior breast tissue
The primary goal of compression is to:
A) reduce the object to image detector distance (OID) of the lesion:
B) allow uniform penetration of structures within the breast
C) reduce the possibility of motion during the exposure
D) reduce the radiation dose to the breast
B) allow uniform penetration of structures within the breast
What features of the high transmission cellular (HTC) grid allows these grids to maintain equal or less radiation dose to the patient compared with linear grids?
A) these grids use lead as the strips and wood as interspace material
B) they have copper as the strips and air as the interspace material
C) they use aluminum as the strips and the air as the interspace material
D) they use wood as the strips and copper as the interspace material
B) they have copper as the strips and air as the interspace material
In general, mammography units as the port window?
Beryllium
The grade ratio can vary and modern mammography units. A common grade ratio used is.:
A) 8:1
B) 6:1
C) 5:1
D) 2:1
C) 5:1
The chest wall edge of the compression paddle should be aligned just beyond the chest wall edge of the detector to:
A) avoid pushing the patient’s chest away and losing breast
B) properly position and compress the breast
C) permit uniform exposure and reduce patient discomfort
D) avoid projecting the chest edge of the paddle on the mammogram
D) Avoid projecting the chest wall of the paddle on the mammogram
Which of the following affects focal spot size?
A) angle of the anode
B) a decrease in the source to image detector distance (SID)
C) decreasing the size of the collimated beam
D) changing the relationship between the object to image detector distance SID
A) angle of the anode
Which of the following is the commonly used focus spot size for routine, work and mammography
A) 3mm
B) 0.3 mm
C) 1 mm
D) 0.1mm
B) 0.3 mm
Which of the following mammography quality control test is performed as needed?
A) phantom image quality
B) visual checklist
C) repeat analysis
D) mammography, equipment evaluation (MEE)
C) repeat analysis
How often is visual checklist performed?
Monthly
How often is Phantom image performed?
Weekly
The general criteria to pass the new American college of Radiology digital mammography (ACD DM) phantom require a minimum of ______ masses.
A) 2
B) 3
C) 4
D) 5
A) 2
What is the compression thickness indicator test?
A) a check of the minimum and maximum compression force of automatic compression
B) a check of minimum and maximum compression force on manual compression
C) a check to ensure that the indicate compression thickness is within normal range
D) a check of the compression on the breast
C) a check to ensure that the indicate compression thickness is within normal range
How often is the compression thickness indicator performed?
Monthly
What is the name given to the test test to determine whether the unit has consistent detector signal to noise level for all breast thickness
A) KVP accuracy
B) visual checklist
C) acquisition, workstation (AWS) QC
D) AEC test
B) visual checklist
A technologist test is performed semi annually is:
A) phantom image test
B) visual checklist
C) compression force test
D) repeat analysis
C) compression force test
How often is the compression force test performed?
Semi annually
What is the range of pounds should be used for a compression force test
25 pounds (111 N) to 45 pounds (200 N)
Repeats are:
A) images taken during a breast stereolocalization
B) images used for QC
C) images that involve unnecessary exposure to the patient
D) all discarded images
C) images that involve unnecessary exposure to the patient
To get a meaningful analysis, the repeat analysis needs a patient of at least _______ patients
A) 200
B) 150
C) 300
D) 250
D) 250
Mammography facilities can receive certification from
A) ACR
B) FDA
3) states as certifiers (SACs)
A) 1 or 2
B) 2 or 3
C) 1 or 3
D) 1, 2 or 3
B) 2 or 3
Aluminum filtration is likely to be matched with _______ targets
A) molybdenum
B) rhodium
C) tungsten
D) beryllium
C) tungsten
Which of the following visual checklist test must be performed before clinical use?
A) paddles/face shields must not be cracked
B) indicators must be working correctly
C) C arm motion must be smooth
D) collimator light must be working
A) paddles/face shields must not be cracked
What material is mostly used of the exit port?
A single binary digit of data, such as “0” or “1” is called a
A) pixel
B) matrix
C) bit
D) byte
C) bit
In general, higher magnification will require the use of a
A) larger local spot size
B) smaller OID
C) smaller focal spot size
D) larger SID
C) smaller focal spot size
Why is an effective focal spot size used for magnification?
Used to compensate for the loss of image detail
Note: air gap acts like grid
The air gap In magnification allows increase subject contrast by
A) increasing scatter
B) reducing scatter
C) reducing motion
D) increasing motion
B) reducing scatter
A grid is not necessary during magnification because
A) grid use decreases spatial resolution
B) the small focal spot size used will compensate for the loss of image detail
C) the large OID produces the same effect as a grid
D) magnification will magnify the normally invisible grid line
C) the large OID produces the same effect as a grid
The air gap in magnification allows increase subject contrast by
A) increasing scatter
B) reducing scatter
C) reducing motion
D) increasing
B) reducing scatter
If the magnification mammography is performed without using a small focal spot size, the resulting image will be magnified
A) and blurred
B) and sharply outlined
C) with increased subject contrast
D) with increased detail
A) and blurred
