CT-COMPUTED TOMOGRAPHY COMPREHENSIVE FINAL ACTUAL EXAM QUESTIONS AND CORRECT ANSWERS (100% CORRECT) ALREADY GRADED A+

CT-COMPUTED TOMOGRAPHY COMPREHENSIVE FINAL ACTUAL EXAM QUESTIONS AND CORRECT ANSWERS (100% CORRECT) ALREADY GRADED A+ Three-dimensional algorithms, or rendering techniques, transform the trans axial computed tomography data into simulated three-dimensional images. True Computed tomography has been applied to the study of internal log defects and Egyptian mummies. True The detectors convert the attenuation data into ____________ signals. electrical Who developed the first whole-body computed tomography scanner? Ledley Which analog-to-digital converter (ADC) is more accurate with respect to sampling an analog signal? 1. 2- bit ADC 2. 16-bit ADC 3. 8-bit ADC 4. 4-bit ADC 16-bit ADC Which type of artifact will appear on a digital image as a result of poor sampling of the analog signal? 1. partial volume 2. beam hardening 3. aliasing 4. poor sampling does not create artifacts aliasing Which type of image processing technique is intended to modify the spatial position of the pixels in an image? 1. geometric processing operation 2. local processing operation 3. global processing operation 4. point processing operation geometric processing operation Which type(s) of image compression results in no loss of information in the compressed image data? I. lossless II. lossy III. reversible IV. irreversible I and III Which image processing hardware is responsible for high-speed processing of the input digital data? 1. digitizer 2. internal image processor 3. host computer 4. image memory internal image processor Explain briefly what is meant by convolution. A technique of filtering in the spatial domain rather than in the frequency domain What is the purpose of the host computer in a digital image processing system? The host computer performs several functions that ranges reading and writing in the image storage and provides for archival storage on tape and disk storage systems. The host computer also plays a significant role in applications that involve the transmission of images to another location. The most obvious difference between computed tomography and radiography is that: 1. radiograph shows cross-sectional images 2. radiography uses sodium iodide detectors 3. A computed tomography shows cross sectional images or transaxial anatomy 4. A computer is used to produce the film in radiography A computed tomography shows cross-sectional images or transaxial anatomy The British Department of Health and Social Security assisted in the development of the first clinically useful computed tomography scanner True Which of the following best describes the term "data acquisition geometry" in computed tomography? 1. the size and shape of the x-ray beam 2. the stationary ring of detectors 3. the arrangement of the x-ray tube and detectors 4. the rotation of the x-ray tube the arrangement of the x-ray tube and detectors Data processing includes all of the following except: 1. raw data preprocessing 2. image storage 3. analog to digital conversion 4. image reconstruction image storage If the linear attenuation coefficients for bone and water are 0.380 and 0.190, respectively, and the scaling factor of the scanner is 1000, the computed tomography number for bone is: 1. +380 2. +1000 3. +190 4. +1000 +1000 Quality control is well established in computed tomography. True Who developed the first clinically useful computed tomography scanner? Hounsfield Which of the following uses software as a tool to provide additional information to the radiologist to make a diagnosis? computer-aided detection (CAD) The computer science application that deals essentially with the display of pictures on a computer screen is called: computer graphics A bit is a contraction for binary digit. true or false True A computer system consists of: hardware, software, and people (3) An eight-bit microprocessor can represent 64 numbers 8 numbers 256 numbers 16 numbers 256 numbers