RAD 150 Final Study Guide Practice 2025 Test, Exams of Radiology

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RAD 150 Final Study Guide Practice 2025 Test

RAD 150 Final Study Guide Practice 2025 Test : T/F: An optimal diagnostic quality radiograph is always within acceptable limits. - CORRECT ANSWER True T/F: Effective image critique should involve a determination of the cause of the problem. -¢ ANSWER-True T/F: If an image is oulside aceceplable limits, crilique is mandatory prior to allempting a T/F: The determination of the cause of an unacceptable or suboptimal image includes NSWER-False technical factors only. - C' T/F: Technical factor problems can include both photographic and geometric problems. - FeTruc TYF: Density problems include mAs selection and focal spot size.- CORRECT ANSWER-False TYF: Geometric problems include magnification and patient motion. - CORRECT ANSWER-True T/F: The three alignment factors include the tube, the part, and the image receptor. - CORRECT ANSWER True T/F: Equipment malfunction involves radiographic/fluoroscopic equipment only. - CORRECT ANSWER-False Generally speaking, the process of image analysis should start with? - CORRECT A review of the entire image Geometric problems dealing with distortion could be due to? - ¢ ray tube alignment An image is presented to the department quality control coordinator by a disgruntled radiologis| thal shows an asymmetrically narrowed ankle motions an an AP projection. His/Her dissatisfaction would be most likely classified as a? - CORRECT ANSWER- Procedural factor patient positioning problem. As medical imaging continues to adopt digital imaging technologies, one of the greatest challenges for t s will be? - CORRECT ANSWER Clearly ide: th detail, identifying possible causes that may be electronic in nature, and determining if past chnologist regarding image analys ing the problem as a photographic vs. geometric problem w processing algorithms are accurate. A photographic problem with visibility of detail would be likely due to?- CORRECT AN, Which of the following clemenls would attenuate a greater percentage of the x-ray beam? -Hydrogen Which pathologic condition involves the accumulation of fluid in the peritoneal cavity? - Which type of specialized photoreceptor cells are found in the retina? - C. ANSWER-cones Which effect occurs because the visual system has difficulty in perceiving contrast differences that are distant from one another? - CORRECT ANSWEF-boundary effect Pattern recognition involves comparing mental image of pattems Lo arrive at a diagnostic opinion. - CORR. recognition is very intensely studied as part of a radiologists education. Computers operate from a _ language. - binary machine The window lovel controls lhe (density) Computed Radiography is also referred to as PSP technology A common feature between. indirect and direct DR technology is .- CORRECT ANS All of the following are related except one. Select the choice that is not related to the others. -Loeal Processing -Manual processing -Point processing -geometric processing - CORRECT ANSWER manual processing in digital image processing, the digital data set is arranged into a histogram distribution in order to determine the WER-exposure index, values of interest (VOD In digital image pra ing, an overexposed or underexposed image can be modified to achicve an acceptable “look” through histogram analysis. This is the result of the Digital processing technique of? - CORRECT ANSWER-Histogram stretching, histogram modification, rescaling The purpose of an LUT is to .- CORRECT. scale of contrast to the digital data set The relationship between digital image resolution ___.- CORRECT ANSWER- is direcL with matrix size, and direct with pixel bit depth The window width controls the ANSWER-image contrast ACR imaging plate that has been grossly overexposed can demonstrate if the erasure process is incomple’ Areadout of CR data from the imaging plate is a line-by-line process which creates a?- CORRECT ANSWER raster pattern In CR technology, preprocessing of data includes? - CORR. ER-histogram analysis. gray scale analysis. exposure data recognition (EDR). Grossly overexposed digital images will demonstrate? - CORRECT ANSWER-noisy images The luminescence of bluc-violet light from a CR Iluorohalide, duc to laser stimulation? - CORRECT ANSWETF-is proportional the the x-ray cnergy exposure When using CR technology, il is important to remember that? - Ci The IP is very sensitive to scatter, making grids very important. the IP will loose about 25% of its signal in 8 hours if not processed, the IP is extra sensitive to exposure after the initial x-ray exposure Positioning of an AP wrist projection off center using a CR receptor, will likely lead to? - Ci A sub optimum image quality As you complete your daily, late afternoon duties as a radiographer, you notice a CR cassette that was exposed earlier in the morning. When you process the cassette in the ceproprocessing crrors af the data, an incorrect histogram analysis, reader, the resultant image will demonstrate? - CORRECT ANSWEF High levels of quantum noise Select the true statement regarding computer radiography (CR). -CR imaging plates are sensitive to post-exposure radiation -Radiographic grids are of little value with CR, due to histogram analysis -CR plate sampling rates determine image brightness Running a CR plate in the fixed mode for a Fuji system requires precise positioning. - -R imaging plates are very sensitive to post-exposure radiation. In computer radiography, if the reader scanning frequency and the radiographic grid = same orientation, what is likely to occur?- CORRECT frequency are similar and in tl All of the following are related lo EXCEPT? -Semi-automatic rable -automatic -fixed - A\n indirect flat panel digital radiography system us ay photons to light. - CORRECT ANSWER Scintillator Lo convert A direct flat panel digital radiography system uses a(n) to convert light into an TYF: One purpose of a charge-couple device (CCD) when used with a DR detector is to collect the light from the scintillator and convert it to electrons. - CORRECT ANSWER- True The relationship between detector "fill-factor” and spatial resolution is? - CO. T/F: The component that converts light to an electronic signal in a digital detector is the photoconductor. - CORRECT ANSWER-True Auto-detection technology with a DR panel? - CORRECT ANSWER-is often referred to as a trigger panel ANSWER-True Producing an acceptable radiograph requires consideration of -Lechnical factor selection. -pathalogy. -film processing. All of the above When many radiographic factors are acting upon one other, it is known as afn) problem. - CORRECT. ANSWER-image repeat rates may be high Which of these activit: radiograp. s would be inconsistent with the “scape of practice” of the -suggesting methods to improve fluoroscopic image quality to a radiologist -obtaining additional patient information to add to an existing patient history that was taken by a nurse = was too low -repeating a suboptimal radiograph after determining the E -identify pneumonia on a chest radiograph for an ER physician - C' TANSWER- identify pneumonia on a chest radiograph for an ER physician Visibility of detail quality factors includes all of the following EXCEPT: -radiographic positioning. -x-ray tube focal spot size -image contrast. -radiographic grids - CORRECT ANSWER radiographic positioning Image quality is primarily the domain of the? - C. ER-radiographer Which phase of the imaging process incorporates the concepts of spatial resolution, brightness, and contrast and dynamic range>? - image: display Factors that affe nc shape of lhe acceplance limil curve of medical images include all of the following EXCEPT -oqmipmen|. condition. -department quality standards. -department location. -positioning abilities of the radiographer. - C T ANSWER department location -Increasing the SID -high mA and shorter exposure times -using lower kVp values -using a small focal spot - CORRECT ANSWER-using a lower kVp values DR detector element saturation can result in image?- CORRECT ANSWER-data drop Fixed kVp exposure techniques systems require? - CORRECT ANSWER-an optimum threshold kVp With digilal detector technology, the tradilional rules of exposure and image quality do ,. One of these rules is that? not necessarily apply complete: amount of sealtor formation is primarily a finction of mAs rath With a variable kVp exposure techniqne system, the threshold kVp is typically sel. at? - CORRECT AN, Essential to ALARA compliance is?- CORRECT ANSWEI-using accurate exposure techniques based upon patient measurement All of the following are related EXCEPT: -Making phantom test exposures -clinical fine-Luning -selecting optimum phantom images from the internet -clinical trials - CORRECT ANSWER-Selecting optimum phantom images from the intermet NSWER-photon Underexposed radiographic images demonstrate? - CORRECT A starvation The total amount of clinically significant diagnostic image on a medical image is referred toas?- CORRECT ANSWER-diagnostic yield Akey feature of DR/CR technologies is the increased sensitivity of the receptor to a wider range of remnant radiation energies, when compared to conventional film-screen systoms. The foature is referred to as? - CORRE! WER-low contrast resolution (LCR) According to the AAPM, a DI value of 4 indicates? and an ALARA violation -OVETEXPOSUTE T/F: Fogging from background radialion is duc to imaging platcs being more sensilive than film.- CORRECT ANSWER-True When adding annotation to a digital radiographic image, it is important to remember that? ANSWEF-electronic annotation for patient laterality is unacceptable. Extraneous information the appears on a medical image, that does not represent the patient and their medical condition, is referred to as? - CORRECT ANSWEF-an artifact The DICOM standard has established 2 classes of information. They are?- CORRECT The acronym PACS stands for? - CORRECT ANS. Communication $ Microsoft Windows 10 is an example of a(n)? - CORRECT ANSWER-operating system In a modern medical imaging department, images are interpreted as images on displays. - CORRE' ‘-Softcopy, flat screen In today’s complex, medical community, guidelines have been established to assist ordering practitioners when they select medical imaging exams for their patients. Many hospitals have incorporated a to assist with these complex decisions. - clinical decision support system. Computer-rclated commutications involving hoalllicare information such as patient demographics, that are widely adopted throughout medical community adhere to? - CORRECT ANSWER-HL-7 Standards Quality assurance includes each of the following EXCEPT: -Equipment maintenance -diagnosis of images -radiology reports accuracy -scheduling - C' WER-diagnosis of images The largest hospital accreditation agency is the?- CORRECT ANSWER-The Joint on (TJC) Comm. The Joint Commission approval is linked to reimbursements. -Insurance company -federal -state all of the above Installation and acceptance testing of equipment is the responsibility of the? - CORRECT ANSWER radiology equipment vendor Routine quality management procedures should be performed by the? - CORRECT ANSWET-qualitied radiographer Which quality control should be done on a regular, ongoing basis? -Collimator accuracy -beam HVL -image repeat analysis -focal spot size estimation - CORR! Test tools for focal spot size estimation include each of the following EXCEPT a? -Motorized synchronous top -pinhole camera -line pair resolution tool When testing collimator accuracy, an SID error of ____ is allowed. - CORRE: ANSWER2% -AEC reproducibility - C( fluoroscopic contrast, image display monitor brightness/contrast, and AEC reproducibility Acommon device to measure display monitor quality and characteristics is a/an? - CORRECT ANSWER-Luminance meter