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ASRT Image Analisys

Image quality and analisys

QuestionAnswer
Which of the following are characteristics of a high quality radiographic image 1.max recorded detail 2.Optimum patient positioning 3. no motion a.1&2 b. 1&3 c. 2&3 d. 1,2,3 d. 1, 2, 3,
Radiographers may perform non interpretive fluoroscopic procedures & assist licensed practitioners w fluoro & specialized interventional imaging procedures, when appropriate & in accordance w state statutes a. True b. False a. True
A RA is responsible for a. evaluating images for completeness and diagnostic quality b.interpreting images c. communicating findings to patients and their families d. ordering imaging exams from diff modalities when studies are inconclusive a. evaluating images for completeness and diagnostic quality
When performing an image analysis the tech should determine whether the acquired images 1define bony cortical outlines 2reflect use of the largest possible receptor size 3satisfy the imaging procedure order & indicaions for the exam a1&2 b1&3c.2&3 d.1,2,3 b 1 & 3
The universal protocol identifies 3 actions that should be performed before an invasive procedure. Which is 1 of those actions a.obtaining informed consent b. marking the site c.providing postprocedure instructions d.performing appropriate lab test b. marking the site
Basic info that must be present on diag images includes 1. tech name 2. pt name 3. pt DOB a 1&2 b 1 & 3 c 2 & 3 d. 1,2,3 c 2 & 3
A repeat exposure should be made if the anatomical side marker is missing on a radiograph a. true b. false A. True
What are the advantages of proper collimation 1.reduces rad dose 2. improves the visibility of recorded detail 3. increases image contrast a. 1, 2 b. 1,3 c. 2, 3 d. 1, 2, 3, d. 1, 2, 3,
___is minimized by keeping the anatomical part parallel to the image receptor and aligning the central ray to pass perpendicular through them a. magnification b. shape distortion c. mottle d. noise b. shape distortion
In _ PT, the stomach is positioned horizontally across the upper potion of the abdomen a. sthenic b. asthenic c. hyposthenic d. hypersthenic d. hypersthenic
Which basic body type makes up about half of the population a. sthenic b. hypersthenic c. asthenic d. hyposthenic a. sthenic
During a BE, the cecum is considered entirely visualized when there is a retrograde filling of the a. jejunum b. terminal ileum c. ascending colon d. descending colon b. terminal ileum
Which of the following is NOT a special positioning concern for geriatric patients a. fragile skin b. hearing loss c. lack of muscular strength d. increased medication tolerance D. increased medical tolerance
Immobilization devices should be used when 1. ordered by the physician in charge 2. less restrictive methods have failed to protect the patient 3. an anatomical variation prevents adequate visualization a1,2 b.1,3 c.2,3 d.1,2,3 d. 1, 2, 3
A grid should be used if the anatomical part being imaged is more than _ inches thick and the exposure requires more than 70 kVp a2 b. 3 c. 4 d. 5 d. 5
Which of the following factors should be considered before administering a contrast agent1.Viscosity 2. toxicity 3. price a.1,2 b.1,3 c.2,3 d. 1,2,3 a 1,2
The required volume of contrast varies according to patient size, anatomy and _ a.pathology b. age c. sex d. preperation a. pathology
Which of the following could be a source of an internal artifact a. PT's hand b. objects behind the imaging plate c. pacemaker d. debris blocking light emission c. pacemaker
Which of the following could produce a moire pattern a. the CR cassette was stored incorrectly b. the lines of a low line-rate grid are parallel to the readers scan lines c. cracks appear near the edges of the IP d. erasure setting was not set properly b. the lines of a low line-rate grid are parallel to the readers scan lines
Detection efficiency is defined as the efficiency with which incident x-rays are a. refracted b. reflected c. scattered d. absorbed d. absorbed
which technical factor related to image quality describes the ability of an imaging system to visualize 2 adjacent structures as separate entities a. spatial sampling b. spatial resolution c. dynamic range d. noise b. spatial resolution
operators should consider using grids with high frequency grid strips during mobile and table top exposures to a. compensate for patient motion b. avoid aliasing patterns c. prevent sampling errors d. increase receptor sensitivity b. avoid aliasing patterns
When using digital systems , operators tend to increase dose to avoid image noise, a concept called a. emission escalation b. dose creep c. exposure expansion d. dose spread b. dose creep
magnification can be minimized by always placing the anatomy of interest as _ the _ as possible a. far from; IR b. close to;IR c. far from; II d. close to ; II b close to; IR
usually, patient possessions and medical devices leave artifacts that _ than the surrounding structures a. are lighter density b. are darker density c. have more contrast d. have less contrast a. Are lighter density