MCQ Tomography Equipment Techniques PDF 2023-2024 - Ibn Khaldun University

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 1- The third generation of CT scanners allowed for further reduction in _____. a- scanning time b- scattered radiation.c- fan-beam width d-. both a and b e- both a and c 2- Filtered back projection in CT refers to _____. a- pre-patient collimation b-image reconstruction c- beam filtration d- spatial resolution e- - beam scattering 3- In helical CT, a single transverse slice represents a.A plane through the body perpendicular to the scan axis b. A plane through the body oblique to the scan axis c. A reconstruction made from projections at neighboring scan axis positions d. Different window levels in CT images e- Different patient dose 4 -In helical CT, pitch is defined as a -Table movement in 360 degrees / beam width b- Patient dose in 360 degrees / beam width c- Reconstructed slice thickness / beam width d- Gantry angle with respect to the scan axis e-Detecting a subtle liver lesion 5- In helical CT, a low-pitch technique might be most helpful for a. Scanning a tachypneic patient b. Detecting a non-displaced fracture c. Detecting a subtle liver lesion d. Scanning a young child e- Accurate multiplanar reconstructions 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 6- Which of the following numbers reported by the scanner best reflects the total amount of radiation delivered to the patient a. Dose b. CT Dose Index (CTDI) c. Pitch d. Dose-length product (DLP) e. Effective mAs 7- The following term refers to a measure designed to reflect stochastic (cancer) risk from radiation a. Dose b. CT Dose Index (CTDI) c. Average dose d. Effective dose e. Dose-length product (DLP) 8- The dose parameter used to correct CTDI for patient size is the a. Effective dose b. Dose-length product (DLP) c. Dose-area product (DAP) d. Size-specific dose estimate (SSDE) e. CTDI Volume (CTDIvol) 9- Positioning the patient off-center within the CT gantry will result in a. Decreased dose b.Increased dose c. Reconstruction artifacts d. Incorrect Hounsfield unit numbers e- Increasing patient size causes increased dose 10- The major determinant of temporal resolution in CT is a. Gantry rotation speed b. Reconstruction algorithm c. Fan-beam angle d. Detector collimation e. Computer processing power 11-A dose-reduction strategy in prospectively gated cardiac CT would be 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. Increasing tube mAs b. Increasing tube kV c. Utilizing ultrahigh pitch technique d. Utilizing a scanner with more detector rows e. Changing the heart rate 12-High radiation doses seen in retrospectively gated cardiac CT, as compared to prospectively gated CT, are a result of a. Increased scanner mAs b. Increased scanner kV c. Increased scanner pitch d. Decreased scanner pitch e. Increased axial coverage 13- 1. The most important physical process responsible for tissue contrast in CT imaging is a. Coherent (Rayleigh) scatter b. Photoelectric absorption c. Incoherent (Compton) scatter d. Characteristic x-ray production e- Increasing kV 14- The CT number (Hounsfield unit) of fat depends on a. kV b. mAs c. Reconstruction algorithm d. Nothing - it is constant e- Decreasing heart rate 15- Beam hardening in x-ray imaging refers to a. Decreasing x-ray beam strength as it passes through a dense material. b. Decrease in a photon's energy as it is scattered by a dense material. c. Increase in a photon's energy as it is scattered by a dense material.d. Decreased average x-ray energy as a beam passes through a dense material 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 e. Increased average x-ray energy as a beam passes through a dense material 16-A hardened beam has what effect on the CT appearance of soft tissue a. No change b. Darker with poorer contrast c. Darker with better contrast d. Brighter with the same contrast e We can achieve very high concentrations in target organs 17- Advantages of dual-energy CT include all the following except a. Virtual non-contrast images b. Separation of dozens of different materials c. Organ perfusion maps d. Calcium subtraction e- Decrease radiation dose 18- When compared with conventional X-ray, CT produces diagnostic images with improved a- Low contrast resolution. b- Spatial resolution c-Minute detail d-PT dose e-All of the above 19- IN 1917, the Austrian mathematician _____________ proved that it was possible to reconstruct a three-dimensional object from the infinite set of all projections. a- Radon b- Tsien c-Bracewell d- Cormack e- Einstein 20- Which of the following is not commonly used as a CT scintillation detector? a- Ceramic rare earth b-Silver halide c- Bismuth germinate d-Cadmium tungstate e- Gold 21- Which of the following able to measure the density of the body tissue? 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- X-ray b-Fluoroscopy c- CT d- MRI e- UV 22- Patient had head trauma and you suspect that he has “intracranial hemorrhage”, Which of following modalities you will choose? a- CT b- Conventional x-ray c- MRI d- X-ray with contrast e-All of the above 23- On which amount of exposure to radiation the patient will suffer from CNS symptoms and could die within 1-2days? a- 200 rem b- 400 rem c- 1000 rem d- 5000 rem e-10 rem 24- The radiologist wears ………….... to know the amount of exposure: a- Film packet b- Thermoluminescent Dosimeter(TLD) c- Geiger-Müller (GM) Detector d- Scintillation Detector e-all above 25- In the Negative-contras t the organ become ……….. Because of …………. ; a- Radiolucent - High atomic weight b- Radiolucent - Low atomic weight c- Radiopaque - High atomic weight d- Radiopaque - Low atomic weight e- Radiolucent - High atomic number 26- CAT scan is essentially _________ a) a finer X-ray of bones b) a detailed x-ray c) x-ray of soft tissues d) x-ray of brain e) all above 27- Why is contrast used in CT scan? a) To suppress particular tissues b) To enhance a particular tissue c) To ensure correct tissue is being imaged d) To reduce bone interference e) To increase bone interference 28- The current generation CT scanner use __________ for scanning 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) pencil beam and stationary detectors b) pencil beam and rotating detectors c) fan beam and detectors d) electron beam and detectors e) photon beam and detectors 29- In order to visualize the flow of blood in the renal arteries, what process is done with CT? a) CT Angioplasty b) CT Angiography c) Simple CT d) CT Cardiography e) all above 30- X-rays are modified a) Protons b) Electrons c) Neutrons d) Positrons e) photons 31- Best imaging modality to diagnose liver mass is a) Plain film b) Angiography c) C. T. Scan d) Nuclear Scan e) MRI 32- Generally, the total work load that an x-ray tube can be safely operated at is limited by a) radiation intensity at 1 meter b) line voltage to the high tension transformer c) heat generated at the target and anode d) high melting point e- none of the above 33- In an x-ray tube, the target , usually tungsten, is mounted in the solid copper a) filament b) focusing cup c) cathode d) anode e) filter 34- If 5000 Joules of energy are released in a 100mA, 1 second exposure, the tube potential is a) 5 kV b) 50 kV c) 500 kV d) 5000 kV e) 1000 Kv. 35- For maximum image sharpness the plane of the film and the plane of the object should be a) parallel b) perpendicular c) at 45 degree d) imaginary e) perpendicular