RTE 1401 Exam 2 2026/2027 | 100+ Questions & Answers | X-Ray Production, Digital Imaging, mAs, kVp, Radiation Interactions & Image Quality

This RTE 1401 Exam 2 2026/2027 study resource contains 100+ questions, definitions and correct answers covering essential radiographic physics and imaging concepts. Across 27 pages, the document reviews x-ray production, radiation attenuation, digital and computed radiography, exposure factors, image quality, mAs and kVp, SID and OID, the inverse square law, grids, beam limitation, x-ray tube construction, focal spots, anode and cathode principles, radiation interactions, CR/DR detector technology and fluoroscopic image intensification. The cover page identifies the resource specifically as RTE 1401 Exam 2 for the 2026/2027 academic period. The opening section introduces key radiographic imaging and digital-image terminology, including attenuation, automatic rescaling, brightness, density, distortion, exposure index, exposure latitude, latent images, grids and penetrating ability. It distinguishes direct detector technology using amorphous selenium (a-Se) from indirect detector technology using amorphous silicon (a-Si), while also reviewing film-screen radiography, fluoroscopy and digital/computerized imaging as major imaging classifications. The document provides extensive review of exposure factors and image quality. Topics include milliampere-seconds, milliamperage, exposure time, kilovolt peak, source-to-image distance, object-to-image distance, focal-spot size, patient factors and image-receptor characteristics. Students review the 15% rule, reciprocity law, inverse square law and exposure-maintenance formula, as well as the four primary image-quality factors of exposure/brightness, contrast, spatial resolution and distortion. Digital concepts include window level, window width, deviation index, exposure index, automatic rescaling, quantum mottle, dynamic range, pixels and matrices. Another major section covers radiation classification and x-ray production. The material distinguishes primary, scatter, absorbed and remnant radiation and explains radiolucent versus radiopaque materials. It identifies four requirements for producing x-rays: a vacuum, source of electrons, method of accelerating electrons and method of stopping electrons. Students also review beam quantity, beam quality, filtration, differential absorption, transmission and scatter control. Pages 10–20 provide detailed coverage of the x-ray tube, anode and cathode assemblies. Topics include the filament, focusing cup, thermionic cloud, space-charge effect, target, focal point, actual and effective focal spots, line-focus principle, stationary and rotating anodes, rotor, stator, induction motor, protective housing, tube window, leakage radiation and the anode heel effect. The resource explains that radiation intensity is greater on the cathode side during the heel effect and discusses tungsten, rhenium and molybdenum in relation to filament and anode construction. It also includes the heat-unit formula (kVp × mA × seconds × rectification factor) and rectification constants for single-phase, three-phase and high-frequency equipment. The x-ray interaction section distinguishes five interactions listed in the document: coherent, Compton, photoelectric absorption, pair production and photodisintegration. Students review their relative energy ranges and characteristics, including Compton scatter as an important source of occupational exposure and photoelectric absorption as a contributor to patient dose. The material also covers Bremsstrahlung and characteristic x-ray production, including electron interactions with the target and characteristic energy transitions. The final portion compares computed radiography, direct DR, indirect DR and film-screen imaging. CR is described using photostimulable storage phosphor and barium fluorohalide crystals, including the sequence from PSP plate through laser scanning, light emission, photomultiplier detection and analog-to-digital conversion. Direct DR is associated with amorphous selenium and conversion of x-rays to an electronic signal, whereas indirect DR uses a scintillator and amorphous silicon in an x-ray-to-light-to-electrical-signal process. The closing pages also review fluoroscopic image-intensifier components, including the input phosphor, photocathode, electrostatic focusing lenses, anode and output phosphor. Relevant Students: This resource is relevant to students enrolled in RTE 1401 or comparable introductory radiographic physics and imaging courses, particularly radiography and radiologic technology students preparing for Exam 2 during 2026/2027. It is especially useful for students reviewing exposure techniques, digital imaging, x-ray tube construction, radiation interactions, CR and DR technology, image quality, radiographic geometry and fluoroscopy. The uploaded document does not identify a specific college or university, so an institution has not been assigned without source support. 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