CTTG Quiz September 2010 Answer

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CTTG QUIZ : 

CTTG QUIZ SEPTEMBER 2010 Compiled by Christine Vanderley-Reichner

50 QUESTIONS : 

50 QUESTIONS A Mixture of general CT knowledge, physics, anatomy and physiology

Q1 –The X-Ray generator for CT scanners is usually a? : 

Q1 –The X-Ray generator for CT scanners is usually a? single phase , half wave rectified high frequency unit three phase, six pulse three phase, 12 pulse

Q2- Slice broadening occurs when the table travel during one rotation is : 

Q2- Slice broadening occurs when the table travel during one rotation is equal to the slice thickness less than the slice thickness greater than the slice thickness Zero

Q3- Which of these techniques will increase the radiation dose to the patient( assume other factors remain constant)? : 

Q3- Which of these techniques will increase the radiation dose to the patient( assume other factors remain constant)? Increase the pitch Decrease the pitch Decrease the acquisition slice thickness Increase of the rotation time

Q4-One of these statements is true? : 

Q4-One of these statements is true? CT is a low dose examination CT has the highest spatial resolution of all medical imaging techniques CT has the highest contrast resolution of all medical imaging techniques CT is a high dose medical imaging technique

Q5- Beam Hardening artifact may be reduced by : 

Q5- Beam Hardening artifact may be reduced by Changing patient position Increasing mAs Increasing the kVp Decreasing slice acquisition thickness All of the above

Q6- Which of the following image reconstruction technique is designed to reduce noise and allow dose reduction : 

Q6- Which of the following image reconstruction technique is designed to reduce noise and allow dose reduction iterative algorithms back projection filtered back projection Fourier reconstruction

Q7- Windowing refers to : 

Q7- Windowing refers to changing the image grey scale changing the image contrast changing the window width or level or both all of the above

Q8. International standards for a routine CT head recommend a DLP ( +/- 10%) : 

Q8. International standards for a routine CT head recommend a DLP ( +/- 10%) 60 600 1080 2000

Q9- Aliasing is an artefact that appears as a result of : 

Q9- Aliasing is an artefact that appears as a result of partial volumeing a bad detector insufficient data samples metal in the scan field beam hardening

Q10. A description of MIP is? : 

Q10. A description of MIP is? The most dense voxels in a volume in the line of view are seen All of the voxels in the volume are displayed The least dense images in a volume in the line of view are seen Only contrast enhanced vessel are seen

Q11. Which of these statements is true? : 

Q11. Which of these statements is true? The intraluminal view seen in virtual colons is a MIP rendered imaged Volume rendered(VR) images are only useful for bones MPR is a form of VR Any 3D technique may be applied to any volume data set

Q12. A routine VQ and perfusion scan will give the patient an effective radiation dose of 1-2mSv. According to ARANSA, what is the average dose for a CT Pulmonary angiogram in Australia : 

Q12. A routine VQ and perfusion scan will give the patient an effective radiation dose of 1-2mSv. According to ARANSA, what is the average dose for a CT Pulmonary angiogram in Australia 20mSv 1mSv 5mSv 0.5mSv

Q13. Approximately how many grams of iodine are contained in a 100mls bottle of 300 concentration IVCM? : 

Q13. Approximately how many grams of iodine are contained in a 100mls bottle of 300 concentration IVCM? 10 20 30 40

Q14. What is the approximate osmolality of non ionic iso- osmolar IVCM? : 

Q14. What is the approximate osmolality of non ionic iso- osmolar IVCM? 200 300 400 500

Q15. According to the RANZCR what precautions should be taken prior to the administration of IVCM for a patient with a suspected phaeochromocytoma? : 

Q15. According to the RANZCR what precautions should be taken prior to the administration of IVCM for a patient with a suspected phaeochromocytoma? None apart from routine Hydrate Do not give IVCM in any circumstances Wait for results of catecholamine's

Q 16- The most effective way to reduce CIN from the highly nephro- toxic IV contrast media is : 

Q 16- The most effective way to reduce CIN from the highly nephro- toxic IV contrast media is fast from all food and drink prior to the study Hydrate your system before and after the injection insist on ionic contrast eat as much food as you can before the test

Q17. eGFR is a measure of renal function using which of the following? : 

Q17. eGFR is a measure of renal function using which of the following? Age sex Age, sex, weight Age, sex ethnicity Age, sex, Creatinine , ethnicity

Q18 –If a mass on the adrenal gland is 10HU or less it is most likely ? : 

Q18 –If a mass on the adrenal gland is 10HU or less it is most likely ? A cyst contains a benign adenoma contains a malignant adenoma requires an IV contrast scan to characterise its nature

Q 19- The vascular arrowed structure is which vessel ? : 

Q 19- The vascular arrowed structure is which vessel ? Splenic vein Superior mesenteric artery S. M. Vein Splenic artery

Q20. This patient has suffered a CVA of which region : 

Q20. This patient has suffered a CVA of which region Insula Thalamus Internal capsule pons

Q 21- Which bone is indicated by the arrow : 

Q 21- Which bone is indicated by the arrow trapezium lunate scaphoid trapezoid

Q 22- What is this common lung abnormality? : 

Q 22- What is this common lung abnormality? metastasis bullae atelectasis bronchiectasis lobar fissure

Q 23- Which coronary artery is indicated with the blue arrow : 

Q 23- Which coronary artery is indicated with the blue arrow Right Coronary Artery Left Coronary Artery Circumflex artery Left anterior descending( LAD)

Q24- If a patient presented with hirsutism. Which organ would you most likely be scanning : 

Q24- If a patient presented with hirsutism. Which organ would you most likely be scanning orbit temporal bones thyroid pituitary fossa

Q25. Steotosis refers to : 

Q25. Steotosis refers to A fatty infiltration as in the liver Bad breath Calcification of the pancreas varicose veins

Q26- Anosmia is the inability to : 

Q26- Anosmia is the inability to Taste Smell Hear See

Q 27-The lower limit of the crus of the diaphragm is ? : 

Q 27-The lower limit of the crus of the diaphragm is ? T10 T12 L1 L2/3

Q28.The scan indicates what common abnormality : 

Q28.The scan indicates what common abnormality Aortic aneurysm Stomach ulcer Oesophageal varicose Hiatus hernia

Q29 – The area circled is mostly responsible for : 

Q29 – The area circled is mostly responsible for Motor Speech Touch Balance

Q30.What is this common congenital abnormality? : 

Q30.What is this common congenital abnormality? Agenesis of corpus callosum Cavum septum arteriosa Cavum septum vergae Cavum septum diesis

Q31. this is an example of? : 

Q31. this is an example of? Dandy Walker Syndrome Cerebellar cyst Mega cisterna magna Cerebellar atrophy

Q32. this is an example of which pleural based neoplasm? : 

Q32. this is an example of which pleural based neoplasm? Mesothelioma Sarcoma Pleurisy Toxoplasmosis

Q33 . According to common aortic aneurysm description, which is this? : 

Q33 . According to common aortic aneurysm description, which is this? Fusiform Abdominal Saccular Pseudo Degenerative

Q34. The thin white rim seen in this scan of abdominal mass is the? : 

Q34. The thin white rim seen in this scan of abdominal mass is the? Renal vein Aorta Inferior vena cava Enhancing tumour

Q35. What is the best description for this abnormality? : 

Q35. What is the best description for this abnormality? SDH EDH EDH with areas of contusion EDH with SAH and areas of contusion

Q36. In this sagittal view of an anterior abdominal wall ( 15HU). What is the most likely diagnosis. ( the patient was on Warfarin) : 

Q36. In this sagittal view of an anterior abdominal wall ( 15HU). What is the most likely diagnosis. ( the patient was on Warfarin) Lipoma Haematoma Hernia infection

Q37. This patient has an obvious deformity in his right hemisphere. What is the likely scenario? : 

Q37. This patient has an obvious deformity in his right hemisphere. What is the likely scenario? Recent CVA Recent head injury Old CVA Old head injury

Q38. What condition best describes this scan? : 

Q38. What condition best describes this scan? Acute mastoidits Acute Otitis media Cholesteatoma Chronic Otomastoiditis

Q39. The gas seen in this degenerative disc is mainly what gas? : 

Q39. The gas seen in this degenerative disc is mainly what gas? Oxygen Nitrogen Hydrogen Air

Q40 The thin dark line in the middle of this cord ( extends from L3 to S1) most likely represents a? : 

Q40 The thin dark line in the middle of this cord ( extends from L3 to S1) most likely represents a? Fatty phylum Syringomyelia Artefact Haematoma

Q41. The abnormality in this orbit scan is consistent with? : 

Q41. The abnormality in this orbit scan is consistent with? Graves Disease Lymphoma Neurofibromatosis amyloidosis

Q42. The arrowed liver 2° is in which segment? : 

Q42. The arrowed liver 2° is in which segment? 5 6 7 8

Q43. This acute/chronic lesion in the lung scan is consistent with? : 

Q43. This acute/chronic lesion in the lung scan is consistent with? Pulmonary TB Bronchogenic cyst Aspergilloma Cystic adenoma

Q44. This brain tumour was proven to an example of? : 

Q44. This brain tumour was proven to an example of? Metastasis Meningioma Astrocytoma Ependymoma

Q45. What is the correct description for this kidney abnormality? : 

Q45. What is the correct description for this kidney abnormality? Crossed fused ectopia Lateral fusion ectopia Horseshoe Horseshoe without rotation

Q46.What is this well defined kidney anatomy? : 

Q46.What is this well defined kidney anatomy? Column of Bertin Column of Burton Renal hilum Renal pyramid

Q47. What is the abnormality in this scan? : 

Q47. What is the abnormality in this scan? Cancer of the caecum Appendicitis with faecoelith Crohns Disease Bowel perforation

Q48. What is the shown abnormality? : 

Q48. What is the shown abnormality? Chronic Sub dural haematoma Lipoma Post operative defect Arachnoid cyst

Q49. What is the most likely description for this mass? : 

Q49. What is the most likely description for this mass? Teratoma Dermoid Cyst Hydra form mole Multi Cystic ovary

Q50. What is the abnormality on this scan? : 

Q50. What is the abnormality on this scan? Carcinoma of the caecum Small bowel obstruction Small bowel intussusception Epiploic appendagitis

THE ENDThanks to my colleagues who supplied some of the images. Make sure that your name is on the answer sheet : 

THE ENDThanks to my colleagues who supplied some of the images. Make sure that your name is on the answer sheet

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