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Image Acquisition
and Evaluation for ARRT Registry
| Question | Answer |
|---|---|
| Pathologic or abnormal conditions that would require an increase in exposure factors includes all of the following except; atelectasis, pneumoperitoneum, Paget disease, congestive heart failure | pneumoperitoneum (question 37, page 201) |
| In radiography of a large abdomen, which of the following is(are) effective ways to minimize the amount of scatter radiation reching the image receptor (IR)? 1. use of close collimation 2. use of low mAs 3. use of a low-ratio grid | 1. use of collimation (question 38, page 201) |
| Which of the following factors contribute(s) to the efficient performance of a grid? 1. grid ratio 2. number of lead strips per inch 3. amount of scatter transmitted through the grid | 1,2,& 3 (question 39, page 201) |
| In comparison with 60 kV, 80 kV will: 1. permit greater exposure latitude 2. produce more scattered radiation 3. produce shorter-scale contrast | 1. permit greater exposure latitude & 2. produce more scattered radiation (question 46, page 203) |
| The term pixel is associated with all of the following except: two dimensional, picture element, measured in xy direction, how much of the part is included in the matrix | how much of the part is included in the matrix (question 47, page 203) |
| Misalignment of the tube-part-IR relationship results in | shape distortion (question 48, page 203) |
| A particular radioraph was produced using 12 mAs and 85 kV with a 16:1 ratio grid. The radiograph is to be repeated using an 8:1 ratio grid What should be the new milliampere-seconds value? | 8 (question 58, page 204) |
| Types of shape distortion include: 1. magnification 2. elongation 3. foreshortening | 2. elongation & 3. foreshortening (question 67, page 206) |
| During CR imaging, the latent image present on the PSP is changed to a computerized image by the | ADC (question 69, page 206) |
| All the following are related to recored detail except; milliamperage, focal-spot-size, SID, OID | milliamperage (question 70, page 206) |
| Pathologic or abnormal conditions that would require a decreases in exposure factors include all of the following except; osteoporosis, osteomalacia, emphysema, pneumonia | pneumonia (question 74, page 207) |
| A 15% decrease in kV accompanied by a 50% increase in mAs will result in a(n) | shorter scale of contrast (question 77, page 207) |
| Which of the following factors impact(s) recorded detail? 1. focal-spot size 2. subject motion 3. SOD | 1,2, &3 (question 78, page 207) |
| Focal- spot blur is greatest | toward the cathode end of the x ray beam (question 80, page 207) |
| If a radiograph exposed using a 12:1 ratio grid exhibits increased brightness/loss of density at its lateral edges, it is probably because the | SID was too great (question 84, page 208) |
| Practice(s) that enable the radiographer to reduce the exposure time required for a particular image include; 1. use of a higher mA 2. use of a higher kV 3. use of a higher ratio grid | 1 & 2 (question 85, page 208) |
| Which of the following materials may be used as grid interspace material? 1. lead 2. plastic 3. aluminum | 2 & 3 (question 8, page 208) |
| An increase in the kV applied to the x ray tube increases the; 1. x ray wavelength 2. exposure rate 3. patient absorption | 2. exposure rate (question 90, page 209) |
| What is the correct order of radiographic film processing? | developer, fixer, wash, dry (question 92, page 209) |
| If the radiographer is unable to achieve a short OID because of the structure of the body part or patient condition, which of the following adjustments can be made to minimize magnification distortion? | a longer SID should be used (question 93, page 209) |
| the reduction in x ray photon intensity as the photon passes through material is termed | attenuation (question 94, page 209) |
| Diagnostic x rays are generally associated with | high frequency and short wavelength (question 98, page 210) |
| The function(s) of the developer in film processing is (are) to; 1. remove the unexposed silver bromide crystals 2. change the exposed silver bromide crystals to black metallic silver 3. hard the emulsion | 2. change the exposed silver bromide crystals to black metallic silver (question 105, page 211) |
| Although the stated focal spot size is measured directly under the actual focal spot, focal spot size actually varies along the length of the x ray beam. at which portion of the x ray beam is the effective focal spot the largest? | at the cathode end (question 106, page 211) |
| HVL is affected by the amount of; 1. kVp 2. beam filtration 3. tissue density | 1 &2 (question 115, page 212) |
| The differences between CR and DR include; 1. DR images are displayed immediately 2. DR has higher DQE and lower patient dose 3. DR uses IPs | 1 and 2 (question 118, page 212) |
| The process of "windowing" of digital images determines the image | contrast (question 120, page 213) |
| What is the purpose of thin layer lead that is often located in the rear portion of an IP? | to prevent scattered radiation fog (question 121, page 213) |
| The purpose of the electroconductive layer of a CR PSP plate is to | facilitate transportation though the scanner/reader (question 122, page 213) |
| Which of the following combinations is the most likely to be associated with quantum mottle? | decreased mAs and increased kV (question 123, page 213) |
Created by:
ljkivett