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