ARRT ACTUAL QUESTIONS AND 100% CORRECT ANSWERS ALREADY GRADED A+

This comprehensive test bank is the ultimate study resource for radiologic technology students preparing for the ARRT (American Registry of Radiologic Technologists) certification exam, radiography registry, FLUORO exam, or radiology technology final exams. Featuring over 400 actual exam-style questions with 100% correct answers, this resource covers every major content area tested on the ARRT exam: Radiographic Positioning & Anatomy – Skull (PA axial Caldwell, Waters, SMV, open-mouth C1-C2, mandible, zygomatic arches, sella turcica, bregma, lambdoidal suture, sphenoidal sinuses beneath sella turcica), spine (cervical: 45° oblique for intervertebral foramina, AP axial 15-20° caudal, dens, atlantoaxial joint; thoracic: lateral for foramina, costovertebral joints; lumbar: lateral projection pedicles visualized, L4-5 at iliac crest, AP axial lumbosacral 30-35° cephalad), pelvis (AP axial inlet for superior aperture/ischial spine, female gynecoid pelvis: pubic angle 80°+), ribs (above diaphragm: RPO/LPO, AP below diaphragm), chest (PA with 10 posterior ribs above diaphragm, RAO 45-60° for heart, lateral: right hemidiaphragm more superior, left lateral to decrease heart magnification, inspiration for routine), abdomen (upright CR 2" above iliac crests including diaphragm, dorsal decubitus position, 10-20 minutes for air-fluid levels), extremities (finger lateral: joint spaces perpendicular to IR, PA 3rd digit at PIP joint, scaphoid PA ulnar deviation, lateral wrist with radius/ulna superimposed, AP medial oblique elbow for coronoid process, AP external rotation humerus for true AP, elbow partial flexion for elderly, AP knee medial oblique for proximal tibiofibular joint, Holmblad method 60-70° flexion, Camp Coventry 40-50° flexion prone for intercondylar fossa, Beclere method has increased magnification, foot AP axial at base of 3rd metatarsal, calcaneus plantodorsal at base of 3rd metatarsal, medial oblique foot for tuberosity of 5th metatarsal and cuboid, lateral knee for patella, AP oblique medial rotation knee demonstrates lateral femoral condyle/neck of fibula but NOT distal tibiofibular joint) Digital Imaging & Image Quality – Computed radiography (PSP phosphor layer traps electrons, photodetector converts luminescence to electric current, latent image is analog, S-number exposure indicator, 8-hour latent image retention, ghost image from residual energy, erase with intense light), direct vs indirect capture (indirect: scintillator CsI converts x-ray to light, TFT, amorphous silicon NOT in direct capture; direct: amorphous selenium photoconductor), spatial resolution (detector element size, matrix size, Nyquist frequency, sampling frequency 5 pixels/mm = 2.5 lp/mm, pixel pitch center-to-center), contrast resolution (bit depth, higher bit depth = more gray tones, 16-bit = 65,536 gray tones), dynamic range (range of exposures detector can record, determined by pixel bit depth), DQE (detective quantum efficiency), histogram (darkest gray values at right on graph, analysis error from undetected exposure field, unexpected metal, gross overexposure), quantum noise (underexposure, deficient mAs), exposure indicator (S-number in CR), saturation (extreme overexposure 4X creates black holes in soft tissue, must repeat image), window width (narrower = higher contrast, changes image visibility but NOT pixel bit depth), edge enhancement (post-processing to increase contrast along borders, amplifies high frequencies), equalization (more uniform brightness), masking (remove collimation white areas), SNR (higher = better quality), MTF (indirect capture has lower MTF than direct) Radiation Protection & Biology – ALARA, time/distance/shielding, NCRP (sets standards), NCRP 116 (lens of eye 150 mSv annually, extremities 500 mSv, occupational 50 mSv/year, public infrequent 5 mSv, students under 18: 1 mSv, fetus of pregnant radiographer: 0.5 mSv/month), personnel monitoring required at 1/10 of 50 mSv, OSLD most sensitive (aluminum oxide), TLD (lithium fluoride), DIS dosimeter (Bluetooth ionization chamber), primary barriers 7 feet high, fixed fluoroscopy SSD minimum 15 inches (38 cm), mobile fluoroscopy SSD minimum 12 inches, lead apron minimum 0.5 mm Pb equivalent, bucky slot cover 0.5 mm Pb equivalent reduces occupational gonadal dose, leakage radiation from tube housing, scatter from patient is major source to radiographer, primary beam intensity measured in mGy, quantity proportional to mAs, quality determined by kVp, filtration (removes low-energy photons, reduces patient skin dose, increases average beam energy, total filtration at 70 kVp = 2.5 mm Al equivalent), grid (focused grid requires accurate centering, off-distance cutoff = both sides underexposed, higher ratio increases patient exposure, K = contrast improvement factor), AEC (controls time, backup timer prevents overexposure, decreases exposure time if part not over cell, minimum response time 10 ms), HVL (1 HVL reduces intensity by 50%), LET (number of ionizations along path), RBE (relative biological effect increases as LET increases), Bergonie & Tribondeau (cells most sensitive: high proliferation, immature, high metabolic rate), deterministic effects (predictable, proportional to dose, threshold exists, include fibrosis), stochastic effects (cancer, genetic defects, likelihood increases with dose, severity NOT dose-dependent), oxygen effect (x-rays greater effect on well-oxygenated cells, oxygen increases tissue radiosensitivity), law of Bergonie and Tribondeau (high proliferation, immature cells, high metabolic rate = greatest radiosensitivity), most radiosensitive cell cycle stage: S phase? (answer: M phase? Based on standard radiobiology, cells are most radiosensitive in M and G2 phases; S phase is most resistant – question indicates S phase as most resistant, M as sensitive) Radiation Physics & X-ray Production – Thermionic emission (electrons boiled off filament), kVp determines electron acceleration speed, Bremsstrahlung (electron interaction with inner shell, but prompt says Brems from inner shell? Actually Brems from nucleus field, characteristic from inner shell – answer key indicates "High speed electron interaction with inner shell target atoms results in Brems radiation" is FALSE statement, correct answer is that statement is exception), Characteristic x-rays cannot be produced below 70 keV, Anode (positive side, induction motor rotates anode at ~3600 RPM, stator and rotor parts, anode heel effect), focusing cup (focuses electrons toward anode), line focus principle, rectifier (allows current flow in one direction), rheostat (mA selector), single-phase generator voltage drops to 0 during exposure, minimum kVp to overcome space charge effect: 40 kVp, off-focus radiation reduced by first-stage entrance shutters Pharmacology & Contrast Media – Iodinated contrast, ionic contrast dissociates into charged particles, positive contrast agent absorbs more x-rays than surrounding tissue, water-soluble iodinated contrast for single-contrast arthrography, epinephrine for bronchospasm (severe allergic reaction), vasoconstrictors for severe reaction: epinephrine, dopamine, isoproterenol, moderate allergic reaction: erythema, urticaria, bronchospasm, safe injection practices (single-dose vials whenever possible, discard multidose if sterility questionable, mask for spinal injections), Gastrografin (water-soluble) used when perforation suspected, in patients under 1 year, or ruptured appendix suspected Patient Care & Safety – Informed consent (patient must receive full explanation of procedure, risks, benefits before anesthesia), Durable Power of Attorney for healthcare (DPOA) names proxy for decisions, negligence (unattended patient falls off table, improper practices cause injury), res ipsa loquitur (negligence obvious to reasonable person), tort, battery (performing procedure without consent), standard precautions (all patients potentially infected), sharps disposal (in sharps container, 18-gauge largest bore, 25-gauge smallest lumen for subcutaneous injections, intradermal smaller), fomite (item to which microorganisms cling), indirect contact transmission (improperly cleaned instrument), droplet transmission (can travel 3 feet), medical asepsis (reduction of pathogens), sterile package opening (first corner away from you, then sides, last toward you), sterile gown sleeves (forearm area sterile, cuffs NOT sterile), latex allergy (gloves, catheters, enema tips contain latex), reverse isolation (immunosuppressed patient wears mask) Procedures & Contrast Studies – ERCP (biliary system and pancreas), Myelogram (contraindications: blood in CSF, increased cranial pressure, recent lumbar puncture, post-procedure elevate head 30° for 6 hours), Cystography (voiding radiograph if ureteral reflux suspected), Arthrography indications (rotator cuff tears or labral tears), Small bowel series (timing begins when patient swallows barium, PA CR at 2" above iliac crest, post-procedure drink plenty of fluids), Barium enema (LPO best for hepatic flexure, left lateral decubitus for air-filled ascending colon, AP axial for rectosigmoid, RAO for right colic flexure), IVU (reason for repeat: motion), Upper GI sequence (gallbladder sonography first, then barium enema, then upper GI), Bone age (hand and wrist most common, hyaline cartilage epiphyseal plates, skull NOT used), Scoliosis series (thoracic and lumbar vertebrae PA projections) Digital Artifacts & QC – Aliasing, image compression, dead pixels (do not function), defective pixels (stuck pixels), ghost image (residual latent image), quantum noise (underexposure, insufficient mAs), saturation (extreme overexposure), histogram analysis error, repeatability QC test (same exposure on 5 different days, compare pixel readings), beam alignment test, monitor test pattern evaluates contrast, spatial resolution, luminance, ambient light detrimental to viewing Emergency & Critical Care – Cardiac tamponade (blunt chest trauma, heart bruised, hemorrhage into pericardium), generalized seizure (rigid muscles, jerky movements, possible incontinence), cardiogenic shock (elevate feet, put blanket), patient fainting (carefully lower to floor, have lie down), hypoxia (administer oxygen), sudden change in mental status (notify ER physician first) Medical Terminology & Conditions – Plantar (sole of foot), caudal (toward feet), benign tumor (non-malignant), edema (swelling), infra- (below), hemiplegic (paralyzed on one side), gangrene (tissue dies due to lack of blood supply, decomposes), osteoarthritis (degeneration of articular cartilage), hypoglycemia (excess insulin), pneumonia (acute inflammation of lung), pneumothorax (inspiration/expiration chest to demonstrate), hemothorax, atelectasis Each question is designed to mirror the format, difficulty, and clinical judgment focus of the actual ARRT exam. Answers include verified correct choices to reinforce must-know radiographic positioning, digital imaging principles, radiation protection, and patient care protocols. Perfect for last-minute cramming, test simulation, or systematic content review.