ARRT Practice Questions and Verified Answers

ARRT Practice Questions and Verified Answers "Touching a patient without permission" is the legal definition of: - ANSWER-Battery .A caliper is a tool used by the radiologic technologist to accurately measure body part thickness. Which method below describes how to properly use this tool? - ANSWER-Place the tool around the body part in such a manner as to measure the central ray entrance and exit positions .A chest radiograph is taken with a patient erect against the bucky with a 12:1 grid using technical factors of 110 kVp and 5 mAs. What factors should be used on a dedicated chest unit with an 8:1 grid? - ANSWER-110 kVp, 4 mAs .A common group of drugs that are used to promote defecation are termed: - ANSWER-Cathartics .A device that acts like a camera in an indirect conversion detector is known as a _________. - ANSWER-charge coupled device .A disadvantage of using magnification mode during fluoroscopy is: - ANSWER-the patient receives additional dose .A metastatic bone survey usually involves imaging these bones: 1. Skull 2. Hands 3. Humeri 4. Femora 5. Pelvis 6. Spine 7. Feet - ANSWER-1, 3, 4, 5, 6 .A patient develops hives several minutes after a radiographic contrast medium is injected. Which type of drug may be given to the patient to counteract this reaction? - ANSWER-Antihistamine .A patient is scheduled for a UGI and small bowel radiological procedures. The patient is suspected of having a perforated colon. Which type of contrast medium is contraindicated for the procedures? - ANSWER-Barium Sulfate .A patient is to be scheduled for a BE, Abdominal US, and UGI. The proper sequence for performing the procedures is: - ANSWER-Abdominal US, BE, UGI .A radiographic contrast medium that absorbs more radiation than the organ in which it is placed is termed a(n) - ANSWER-Positive agent .A radiologist asks you to administer a radiographic contrast medium. The patient collapses from anaphylactic shock. You may be protected from a lawsuit under the doctrine of respondeat superior, meaning: - ANSWER-Let the master answer .A right lateral decubitus radiograph is taken of a patient with the grid placed behind the patient. This is an example of a(n): - ANSWER-AP Projection .Added filtration in a diagnostic x-ray machine is used for the main purpose of reducing radiation dose to the: - ANSWER-Patient's skin .All of the following are true of oxygen therapy EXCEPT: - ANSWER-oxygen therapy can be prescribed by pharmacists and respiratory therapists .An extremity encased in a fiberglass cast requires what modification to exposure factors? - ANSWER-Usually no increase in exposure factors is needed .An older x-ray tube that has evaporated tungsten on the tube window may cause which of the following problems: 1) decreased tube output, 2) decreased half-value layer (HVL), 3) arcing of the tube current - ANSWER-1 & 3 .An optimal radiograph of the lumbar vertebrae of a geriatric patient requires a technique of 70 kilovolts (peak) and 40 mAs. To reduce exposure to the patient and maintain adequate radiographic density: - ANSWER-Increase kilovolts by 15 percent with a 50 percent decrease in milliamperage-seconds .As the field size is increased with all other factors remaining constant, the scale of radiographic contrast will: - ANSWER-Be lengthened .Automatic brightness control (ABC) and Automatic exposure rate control (AERC) are components of fluoroscopic systems whose purpose is to ensure creation of images with appropriate brightness while not exposing the patient to excess radiation. Of the following examples of ABC programming, which one will deliver the lowest dose to the patient? - ANSWER-System will increase kVp to a maximum before increasing mA. .Cells are most sensitive to radiation when they are immature, undifferentiated, and rapidly dividing. This summarizes: - ANSWER-The law of Bergonie & Tribondeau .Computed radiography acquires an image through: - ANSWER-the use of a storage phosphor plate .Computed radiography plates respond to radiation with _____. - ANSWER-photostimulable luminescence .Determination of radiological bone age is most frequently applied to the: - ANSWER-hand and wrist .Direct action may occur after exposure to any type of radiation, but it is much more likely to happen after exposure to: - ANSWER-high-LET radiation such as alpha particles .Dose area product (DAP) is a method of quantifying radiation dose based upon the dose received by local tissue and the volume of tissue irradiated. Which of these statements is/are accurate? 1. DAP may be a better indicator of stochastic risk than effective dose alone 2. DAP increases with increasing field size. 3. Exposing less tissue decreases DAP 4. DAP accounts for primary and leakage radiation - ANSWER-1, 2 and 3 .During an ERCP, an endoscope is passed into the duodenum under fluoroscopic control. "Spot" images are usually taken of the _____ duct(s) .1. pancreatic 2. hepatic 3. common bile - ANSWER-1 & 3 .During an operative cholangiogram, the surgeon injects the contrast medium directly into the biliary system. Which of the following projections are typically done during this procedure in surgery? 1. AP 2. AP oblique, RPO 3. AP oblique, LPO - ANSWER-1 & 2 .During cardiopulmonary resuscitation (CPR) of an adult, the cardiac compression rate should be about: - ANSWER-at least 100 compressions per minute .During cystography, when ureteral reflux is suspected, it is often necessary to include a __________ radiograph. - ANSWER-Voiding .For persons with hematopoietic syndrome, survival time shortens as the radiation dose: - ANSWER-Increases .For the AP projection of the forearm, the hand is: - ANSWER-Supinated .For the cervicothoracic region lateral projection (swimmer's technique), the recommended position of the humeral head closest to the IR is move - ANSWER-anteriorly .For which type of habitus will the diaphragm be at the highest position? - ANSWER-Hypersthenic .Grid use for PSP examinations is more critical than in film/screen radiography because CR: - ANSWER-Imaging plates are more sensitive to low energy photons .Grids can cause the moiré effect on digital images if this principle has not been satisfied: - ANSWER-Nyquist criterion .How is the central ray directed to obtain AP axial C-spine? - ANSWER-15 to 20 degrees cephalad .How many degrees and in which direction should the central ray be directed for an AP projection of the sacrum? - ANSWER-15 degrees cephalic .How many heat units (HU) are generated when setting a technique of 75 kVp, 400 mA, 250 milliseconds, on a 3-phase, 12-pulse generator? - ANSWER-10,575 HU