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CT imaging.
| Question | Answer |
|---|---|
| Ionic contrast | Diatrizocite...metrizoate....Ioxoglate |
| None Ionic | Iopamidol.....Iohexol..... |
| Pitch | Table movement /slice thickness. |
| Normal Creatine | 0.6-1.2 mg/dl |
| Quantum Noise | Number of detected photons. |
| Contrast media used for byopsys | Water soluble iodinated. |
| Where are the seminal vessels located? | Posterior to bladder anterior to rectum and superior to the prostrate gland. |
| What does PTT measure? Why is it used? An average range for activated PTT is ? | Blood coagualtion,invasive procedures byopsi etc. 25-35 sec |
| Correct angle of IV insertion for vein? | 15 degrees |
| You are giving a IV bolus of 125mls via injector for a delay of 50sec what is your rate of flow? | 2.5 mls mls÷flow rate. |
| CTD1 is used to describe ? | Radiation dose to or during scanning. |
| While interviewing to give contrast you main 2 questions are | Allergy history to contrast media and asthma |
| Which factors affect GFR | Age,race,sex |
| When administering IV contrast which has the greatest overall plasma iodine concentration. | Bolus technique .required entire volume over short period of time. |
| Simple cysts of the kidneys have an HU of | 0 to +20 |
| After giving a rapid bolus arterial phase of hepatic contrast enhancement occurs approx | 25-35sec. |
| The abdominal aorta bifurcates at level of and into which arteries? | L4 bifurcates into left and right common iliac arteries |
| On an EGG of a complete cycle which portion of the R-R interval is the heart in dystole | 55 -75% |
| The accumulation of gas such as within the internal disk is called the | Nitrogen , Vaccume phenomenon |
| During a spiral helical exam the scanner aquires data | Continuously aquiring data as the patient moves through the gantry acquiring volumetric data containing all attenuation from anatomy scanned. |
| A brain without is performed without contrast for ? Why. | Subderal hematoma increased CT value eliminates the need for contrast . |
| When scanning for TCC (tranisiinal cell carcinoma) of the bladder which phase best demonstrates renal enhancement | Excretory phase ; 3 to 15 minutes delay filling defects within the bladder,ureters and renal pelvis. |
| CT General survey of neck section width and spacing | 3 mm thick every 3mm. |
| The still viable ischemic tissue that surrounds the infarct core with an acute stroke is known as ? Normal range of CBV | Penumbra , 2.5 mL per 100grm of tissue. |
| HRCT of chest is used to survey the .... | Lungs |
| When doing a PE study this technique can be used to remove unwanted pulsation artifacts from cardiac motion . | Retrospective ECG gating. |
| Explain retrospective gating | Scanning throughout the entire cardiac cycle only data from specific user determined portions of the ECG waveform are recontructed and used to create an image. |
| Venous phase only general abdomen CT is given at a flow rate of | 1.0 to 3.0 |
| Diffuse fatty infiltration of the hepatic parenchyma is referred to as | Hepatic Steatosis or fatty liver disease |
| Normal liver HU | 10HU anything less then 10 HU less then spleen is considerd steatosis. |
| 30 to 40 sec after injection this phase is known as ....best demintrastes? | Corticomedullary phase best demonstrates optimal enhancement of renal cortex from renal medulla . |
| During CT survey of the brain the gantry should be angled | 15 degrees above the (IOML) |
| When scanning the larynx what letter is the patient instructed to say and why? | E",evaluate mobility of vocal cords |
| Imaging plane parallel to the foots surface is | Axial plane is parallel to the foots plantar surface. |
| The oblique axial plain is parallel to which part of the foot ? | Metatarsal 20 to 30 degrees caudaul from direct axial plane. |
| The intermittent cramping in the legs due to poor circulation is known as | Claudation |
| Complex fractures of the worst are most common in which carpal bones. | Scaphoid (navicular). |
| Prior to CT colonography a bowel cleansing is termed | Catharsis. |
| An entervesicle fistula is communicating between the | Bowel and bladder. |
| This pathological disease process is considered interstitial disease of the lungs. | Bronchiectasis,emphysema,abestosis and sarcoidosis. |
| The cul-de-sac is the. | Posterior to the uterus and overiesand coming site for ascites with pelvic pathology. |
| Pituitary gland and the sella turcica is best demonstrates in which plane? | Coronal plane, involves less partial volume averageing. |
| Most common site for injury due to blunt trauma is the which injuries are most common | Spleen , hematoma,hemorrhage,laceration. |
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kitcc
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