STUDY GUIDE FOR ARRT EXAM 2024 (WITH COMPLETE ANSWERS 100% CORRECT) A+ GRADED.

STUDY GUIDE FOR ARRT EXAM 2024 (WITH COMPLETE ANSWERS 100% CORRECT) A+ GRADED. A total of ________ dots on the receptor is the proper number during a spinning top test of a single-phase, fully rectified generator at 0.10 seconds. - CORRECT ANSWER-12 Using a 75 kVp x-ray beam with a 0.25 mm lead-equivalent apron provides protection from _______ of the beam. - CORRECT ANSWER-66% When discussing the grid, the letter "K" represents the ________. - CORRECT ANSWER-The letter "K" represents the contrast improvement factor for a grid. The radiographer can best control the production of scatter radiation by: - CORRECT ANSWER-Reducing the field size Scatter production is affected by: - CORRECT ANSWER-Compton interactions The portion of the light localizing collimator that reduces off-focus radiation striking the patient is the: - CORRECT ANSWER-shutters closest to the tube port Contrast resolution of a CR/DR image is determined by the ________ of the system. - CORRECT ANSWER-bit depth The measurement of the half-value layer of the beam is an assessment of: - CORRECT ANSWER-beam filtration The ICRP dose equivalent limit for the skin is_______ mSv. - CORRECT ANSWER-550 mSv The ________ risk model predicts that excess cancer deaths from irradiation will increase over time as the naturally occurring risk increases with age in the nonirradiated population. - CORRECT ANSWER-absolute Another name for the calcaneus is the: - CORRECT ANSWER-os calcis The right kidney is placed perpendicular to the image receptor in the ________ position. - CORRECT ANSWER-RPO Which of the following is NOT an effective way to predict risk of a patient falling in the radiology department? - CORRECT ANSWER-asking the pt family For a lateral projection of the humerus, it is necessary to have the coronal plane passing through the humeral epicondyles aligned ________ to the image receptor. - CORRECT ANSWER-perpendicular On an axiolateral projection of the temporomandibular joints (TMJs), the patient's head is placed in a lateral position with the TMJ of interest closest to the image receptor. The central ray is angled caudally about 30°. On the image, the TMJ of interest will be projected ________ to the other TMJ. - CORRECT ANSWER-superiorly The unit of measurement for absorbed dose is the: - CORRECT ANSWER-Gray what is the MOST likely to result in changes in the DNA of circulating lymphocytes. - CORRECT ANSWER-cardiac catheterization The _____________ shows the lesser tubercle of the humerus in profile and directed anteriorly. - CORRECT ANSWER-The Lawrence method, inferosuperior axial projection, demonstrates the scapulohumeral joint, coracoid process, lesser tubercle (directed anteriorly), AC joint, acromion, and acromial end of the clavicle. A negative charge is applied to the _______to minimize electrostatic repulsion. - CORRECT ANSWER-the focusing cap If an individual receives an acute, high dose of radiation to the forearm, what is the correct order in which the following effects will occur? - CORRECT ANSWER-erythema, epilation and thn desquamation Exposure of an embryo or fetus to radiation from _____________ is MOST likely to result in a skeletal abnormality. - CORRECT ANSWER-3 weeks to 20 weeks of development All of the following are located in the secondary x-ray circuit EXCEPT for:A)rectifiers. B) the anode. C) filaments. D) stators - CORRECT ANSWER-filaments Technologists should be aware that one of the greatest concerns for an elderly patient is fear of: - CORRECT ANSWER-falling The anteroposterior (AP) oblique projection of the ribs with the patient in the right posterior oblique (RPO) position best shows the ________ portion of the ribs. - CORRECT ANSWER-right axillary Which of the following urography examinations demonstrates the physiologic function of the urinary system? A) intravenous urography B) percutaneous antegrade pyelography C) retrograde urography D) cystography - CORRECT ANSWER-Intravenous urography For a lateral projection of the orbit, the central ray is perpendicular to the image receptor and enters: - CORRECT ANSWER-outer canthus While in the x-ray tube, x-rays travel at: - CORRECT ANSWER-c=3 x 10 to the 8th power m/s The decreased brightness along the periphery of an image that occurs when using image-intensified fluoroscopy is referred to as: - CORRECT ANSWER-vignetting is decreased brightness that results from the curved shape of the photocathode in the image intensifier. The curvature results in less accuracy in focusing the electrons that are released from the periphery of the photo-cathode. This affects brightness For the right anterior oblique (RAO) position during an upper GI examination, the patient should be rotated approximately: - CORRECT ANSWER-40° to 70°. All of the following EXCEPT _______________can be used to monitor occupational exposure. A) optically stimulated luminescent dosimeters B) dose-area product meters C) thermoluminescent dosimeters D) film badges - CORRECT ANSWER-B) dose-area product meters The ________ is a collection of disc drives that perform together as a single unit and improve reliability of data storage. - CORRECT ANSWER-The redundant array of independent discs (RAID) is a data storage The effective focal spot size is affected by - CORRECT ANSWER-the anode, or target, angle affects the effective focal spot size. The smaller the anode angle, the smaller the effective focal spot size. There are limitations to how small the angle can be; if it's too small, the x-ray beam area might not be large enough to cover a large receptor size (i.e., 35 cm x 43 cm). Beam penetrability is affected by: - CORRECT ANSWER-a filter As x-rays pass through a filter, the lower energy rays are attenuated. This results in a beam with higher average energy. Collimation affects the volume of tissue that is irradiated; milliamperage affects the quantity of x-rays, and receptor size has no effect on penetrability. Typical grid ratios found in fluoroscopic units are: - CORRECT ANSWER-6:1 and 10:1 The central ray is angled ________ in a ________ direction for the AP axial projection (Ferguson method) of the lumbo-sacral junction. - CORRECT ANSWER-30 to 35 cephalad When evaluating an image of the pelvis, the radiographer notes that there is maximum demonstration of the lesser trochanters. Was this patient positioned correctly for a non-trauma AP projection of the pelvis? - CORRECT ANSWER-No, because the femoral necks are not parallel with the image receptor. When the femora have been medially rotated, the image should show very little or no lesser trochanters. Medially rotating the femora 15° to 20° places the femoral necks parallel with the image receptor. The base layer of a flat-panel detector is made of: - CORRECT ANSWER-The thin-film transistor (TFT) array is mounted onto a glass substrate. If a technologist notices an occurrence such as an accident or emergency in a health care facility that could be potentially harmful to a patient, staff, or visitors, the technologist should immediately: - CORRECT ANSWER-assist the person affected Which of the following statements is TRUE regarding source-to-image distance (SID)? A) decreasing SID decreases Compton scatter B) decreasing SID decreases magnification. C) increasing SID increases receptor exposure D) increasing SID decreases distortion. Result: Incorrect - CORRECT ANSWER-Increasing SID will reduce distortion of the image. Specifically, the image will be less magnified The ________ pleura closely adheres to the surface of the lung. - CORRECT ANSWER-The visceral pleura closely adheres to the surface of the lung, extends into the interlobar fissures, and is contiguous with the outer layer of the hilum. The central ray entrance point for an AP oblique projection, or Grashey method, of the shoulder is: - CORRECT ANSWER-The central ray entrance point of an AP oblique projection, or Grashey method, of the shoulder is 2 inches medial and 2 inches inferior to the super-o-lateral border of the scapula When performing the Rafert-Long method scaphoid series, the radiographer positions the patient's wrist in extreme ulnar deviation and acquires a series of ______ PA and PA axial images with varying central ray angulation. - CORRECT ANSWER-includes 4 images with the patient's wrist positioned in extreme ulna