Ibn Khaldun University College MCQ Tomography Equipment 2023-2024 PDF

Ministry of Higher Education ‫وزارة التعليم العالي والبحث العلمي‬ and Scientific Research ‫كــــــــلية ابن خلدون الجامــــــعة‬ Ibn khaldun University College...

Ministry of Higher Education ‫وزارة التعليم العالي والبحث العلمي‬ and Scientific Research ‫كــــــــلية ابن خلدون الجامــــــعة‬ Ibn khaldun University College ‫ تقنيات األشعة والسونار‬: ‫القسم‬ Stage: : second stage ‫ الثانية‬:‫المرحلة‬ Subject: Computed ‫ تقنيات اجهزة التصويرالمقطعي‬:‫المادة‬ Tomography Equipment ‫المحوسب‬ techniques ‫الوقت‬ Time: 2 h. 2023-2024 MCQ Tomography Equipment ‫ فصلي‬/ ‫النظام كورسات‬ techniques c- x-ray energy into light, after which the light is converted into mechanical energy by a photodetector d- light into x -ray energy, after which the light is converted into electrical energy by a photodetector e- x-ray energy into light, after which the light is converted into magnetic energy by a photodetector 73- In CT, scintillation detectors must exhibit a- a high light output, b- short primary decay time (up to tens of μs) c-, low afterglow, d- radiation damage resistance, e- All of the above 74- Gas-ionization detectors, which are based on the principle of ionization, were introduced in a- third- generation scanners b- second - generation scanners c- fourth - generation scanners d- first-- generation scanners e- unique-generation scanners 75- MSCT scanners are all based on the use of a- solid-state detector arrays. b- Gas-ionization detectors c- Xenon detectors d- scintillation detectors e- All of the above 76- the attenuation coefficient of a tissue is a- not constant b- may be altered by the tissue thickness c- depend on the energy of the x ray photon (KeV). d- the higher the tissue density, the higher its μ value. e- All of the above 77- The projected datasets are back-projected to form the corresponding images a- BP1, BP2, BP3 b- BP1, c- , BP3 d- BP2, BP3 e- BP1, BP2, BP3 and BP4 78- The reconstruction involves a- minuses these back-projected images to form an image of the object. Ministry of Higher Education ‫وزارة التعليم العالي والبحث العلمي‬ and Scientific Research ‫كــــــــلية ابن خلدون الجامــــــعة‬ Ibn khaldun University College ‫ تقنيات األشعة والسونار‬: ‫القسم‬ Stage: : second stage ‫ الثانية‬:‫المرحلة‬ Subject: Computed ‫ تقنيات اجهزة التصويرالمقطعي‬:‫المادة‬ Tomography Equipment ‫المحوسب‬ techniques ‫الوقت‬ Time: 2 h. 2023-2024 MCQ Tomography Equipment ‫ فصلي‬/ ‫النظام كورسات‬ techniques b- producing these back-projected images to form an image of the object. c- dividing these back-projected images to form an image of the object. d- summing these back-projected images to form an image of the object. e- All of the above 79- Back-projection can also be explained with the following a-2 × 2 matrix b- 3-3 matrix c- 3 X3 matrix d- 1 X 1 matrix e- 4 X 4 matrix 80- BP advantages include its relatively a- short time for complete reconstruction (≤30–40 slices per minute). b- short time for complete reconstruction (≤30–40 slices per second). c-long time for complete reconstruction (≤30–40 slices per second). d-medium time for complete reconstruction (≤30–40 slices per second). e- short time for complete reconstruction (≤30–400 slices per second). 81- The primary advantages of iterative image reconstruction algorithms are a- to reduce image noise and minimize the higher radiation dose inherent in the filtered back-projection algorithm. b- to reduce image noise and maximize the higher radiation dose inherent in the filtered back-projection algorithm. c- to additive image noise and minimize the higher radiation dose inherent in the filtered back-projection algorithm. d- to reduce image noise and minimize the lower radiation dose inherent in the filtered back-projection algorithm. e- to maximize image noise and minimize the higher radiation dose inherent in the filtered back-projection algorithm. 82- Two significant other differences exist between SSCT and MSCT: a- The first involves the relationship between slice thickness and x ray beam width. Ministry of Higher Education ‫وزارة التعليم العالي والبحث العلمي‬ and Scientific Research ‫كــــــــلية ابن خلدون الجامــــــعة‬ Ibn khaldun University College ‫ تقنيات األشعة والسونار‬: ‫القسم‬ Stage: : second stage ‫ الثانية‬:‫المرحلة‬ Subject: Computed ‫ تقنيات اجهزة التصويرالمقطعي‬:‫المادة‬ Tomography Equipment ‫المحوسب‬ techniques ‫الوقت‬ Time: 2 h. 2023-2024 MCQ Tomography Equipment ‫ فصلي‬/ ‫النظام كورسات‬ techniques B- The second relates to beam configuration effects. c- both a and b. d- the relationship between detector thickness and x ray beam width. e- The second relates to energy effects. 83- MS/MD CT has the advantages of a- Its speed can be used for fast imaging of large area of tissue with wide sections. b- Its speed can be used for fast imaging of large volumes of tissue with wide sections. c- both a and b. d- Their ability to cover large body section in long scan times. e- all of the above. 84- The photosensitive material used in X-rays films consists of a) Cellulite b) Silver bromide c) Zinc sulphide d) Cadmium e- Iron. 85- DSCT include three unique operating modes: a- Dual Source mode b- Dual Source Single Energy (DSSE) c- Dual Source Dual Energy (DSDE) d- at different energies (different kV-settings, e.g., 20 kVp and 140 kV), e- both a , b and c. 86- Which of the following is acute/deterministic effect? a- High level of radiation over short period of time. b- High level of radiation over long period of time. c- low level of radiation over long period of time. d- low level of radiation over short period of time. e- all of the above. 87- The maximum field of view which can be obtained with a specific radiographic system is generally limited by the: a. Focal spot size. b. Anode size. c. Anode angle. d. Focal Length e- cathode angle. 88- The primary factor that limits the maximum MA that can be used during a radiographic exposure is: a. Anode angle. b. Focal spot size. c. Cathode temperature. Ministry of Higher Education ‫وزارة التعليم العالي والبحث العلمي‬ and Scientific Research ‫كــــــــلية ابن خلدون الجامــــــعة‬ Ibn khaldun University College ‫ تقنيات األشعة والسونار‬: ‫القسم‬ Stage: : second stage ‫ الثانية‬:‫المرحلة‬ Subject: Computed ‫ تقنيات اجهزة التصويرالمقطعي‬:‫المادة‬ Tomography Equipment ‫المحوسب‬ techniques ‫الوقت‬ Time: 2 h. 2023-2024 MCQ Tomography Equipment ‫ فصلي‬/ ‫النظام كورسات‬ techniques d. Exposure time. e- all of the above. 89-. The primary x-ray beam penetration (percent) through a patient can be increased by increasing the: a. KV. b. MAS. c. Film-focus distance d. Beam area. e- all of the above. 90- Relatively low KV values are used in some x-ray procedures for the purpose of: a. Increasing penetration. b. Increasing contrast sensitivity. c. Decreasing patient exposure. d. Decreasing area contrast. e- all of the above. 91- Changing the KV from 90 to 70 will generally: a. Decrease calcium-soft tissue contrast. b. Require an increase in MAS by at least a factor of 4 c. Increase patient exposure. d. Decrease iodine-soft tissue contrast.. e- all of the above. 92-. Changing from a 5:1 ratio to a 10:1 ratio grid will : a. Decrease Patient exposure. b. Increase Image contrast. c. Decrease Required KV or MAS. d. Decreased X-ray tube heating.. e- all of the above. 93-. The radiographic visibility and contrast of a 1 cm soft tissue mass in the body would generally be decreased by an increase in all of the following EXCEPT; a. Focal spot size. b. Field of view. c. KV. d. Object-receptor distance.. e- all of the above. 94-. If a "medium" speed intensifying screen is replaced with a "high" speed screen (same phosphor material) for the purpose of reducing patient exposure, there will be less: a. Contrast. b. Visibility of anatomical detail. c. Quantum noise. d. Exposure latitude. b.. e- all of the above. 95-. The thickness of an intensifying screen has a significant effect on all of the following EXCEPT: a. Image contrast. b. Image blurring. c. Receptor sensitivity. d. Patient exposure.. e- all of the above. 96- The third and final step in the CT process a- involves image display, b- storage, c-communication. d- a , b and c. e- all of the above. 97- The specific number of shades of grey chosen for presentation the CT image’s on the compressed scale is called a- the window space b- the window width (WW) c- the window long (Wl) d- the window area e- all of the above. 98- the center or midpoint of the CT number range that composes a CT image’s gray scale; is called Ministry of Higher Education ‫وزارة التعليم العالي والبحث العلمي‬ and Scientific Research ‫كــــــــلية ابن خلدون الجامــــــعة‬ Ibn khaldun University College ‫ تقنيات األشعة والسونار‬: ‫القسم‬ Stage: : second stage ‫ الثانية‬:‫المرحلة‬ Subject: Computed ‫ تقنيات اجهزة التصويرالمقطعي‬:‫المادة‬ Tomography Equipment ‫المحوسب‬ techniques ‫الوقت‬ Time: 2 h. 2023-2024 MCQ Tomography Equipment ‫ فصلي‬/ ‫النظام كورسات‬ techniques a- the window level (WL) b- the window space c- the window length d- a, b and c e- all of the above. 99- The grayscale image is displayed on a television monitor called a- (Cathode ray tube [CRm]) b- - (Cathode ray tube [CRT]) c- - (Cathode ray tube [CtT]) d- a , b , and c e- CEIA 100- CT Scan stand for__________. a-Computed Tomography Scan b-Computerized Topography Scan c-Coloured Topography Scan d-Computer Tomography Scan e--Computer Scan 101- Computed tomography is identified as a-Reflection tomography b-Emission tomography c-Volumetric tomography d- Transmission tomography e- No all above 102- When compared to projection radiography, conventional tomography shows a- Better spatial resolution Improved contrast resolution b- Relaxed quality control c- Less operator involvement e- No all above 103- Some of the key uses for industrial computed tomography scanning are i. flaw detection ii. reverse engineering iii. failure investigation a- Only (i) and (ii) are correct b- Only (ii) and (iii) are correct c-All are correct d- Only (i) and (iii) are correct e-Only (i) 104- Industrial CT scan not used for a- Assembly analysis b-Material analysis c- Void, cracks and defect detection d-Mathematical analysis e- None of the above 105- _______for industrial CT scanning allow measurements even of hidden part. a- Software programs b-Flat panel X-ray detector c- Cone beam X-ray source a- d-X-ray line detector e- None of the above