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Mosby's CT Definitions > Part 3 > Flashcards

Part 3 Flashcards

1
Q

What is the series of blood-flow related events that occur from the beginning of one heartbeat to that of the next?

A

Cardiac Cycle

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2
Q

What is a common measurement during CT perfusion studies of the brain?

A

Cerebral Blood Flow (CBF)

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3
Q

What is CBF?

A

Cerebral Blood Flow

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4
Q

What is the quantity of blood (mL) that moves through 100 g of brain tissue each minute?

A

Cerebral Blood Flow (CBF)

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5
Q

What is the normal range of gray matter?

A

50 to 60 ml/100 g/min

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6
Q

What is a common measurement during CT perfusion studies of the brain?

A

Cerebral Blood Volume (CBV)

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7
Q

What does CBV stand for?

A

Cerebral Blood Volume (CBV)

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8
Q

What is the quantity of blood (mL) contained within a 100-g of brain tissue?

A

Cerebral Blood Volume (CBV)

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9
Q

Cerebral Blood Volume (CBV) is the quantity of blood (mL) contained within a 100-g of brain tissue. What is normal range?

A

4 to 5 mL/100g

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10
Q

What is the level of blood flow throughout brain tissue?

A

Cerebral Perfusion

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11
Q

What is the produce of milliamperage (mA) and scan time (seconds) utilized for a CT acquisition?

A

Constant mAs

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12
Q

What does mA stand for?

A

millamperage

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13
Q

What are CT images acquired with equal section thicknesses and reconstruction intervals?

A

Contiguous Images

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14
Q

What is the ability of a CT system to detect an object with a small difference in linear attenuation coefficient from the surrounding tissue?

A

Contrast Resultion

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15
Q

What can also be referred to as: low-contrast detectability or sensitivity?

A

Contrast Resolution

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16
Q

What is a substantial decline in renal function that can occur after a patient receives IV contrast material?

A

Contrast-Induced Nephrotoxicity (CIN)

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17
Q

What does CIN stand for?

A

Contrast-Induced Nephrotoxicity (CIN)

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18
Q

What is usually signified by a marked increase in serum creatinine over a baseline measurement obtained prior to contrast agent administration?

A

Contrast-Induced Nephrotoxicity (CIN)

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19
Q

What is the mathematical filtration used by the CT system to remove blurring artifact during the back-projection method of image reconstruction?

A

Convolution

20
Q

What is a late arterial phase of renal enhancement beginning 30 to 40 seconds after the initiation of contrast agent administration?

A

Corticomedullary Phase

21
Q

When does optimal enhancement of the renal cortex and renal veins occur?

A

During the Corticomedullary Phase

22
Q

What is a waste product of metabolism found in the bloodstream and measured as an indicator of renal function?

A

Creatinine

23
Q

What is the normal range of creatinine?

A

0.5 to 1.5 mg/dL

24
Q

What is the CT evaluation of a joint after the intra-articular injection of iodinated contrast material?

A

CT Arthrography

25
Q

What is the specialized MSCT examination of the tracheobronchial tree consisting of MPR and volume-rendered 3D images reconstructed from thin, overlapping MDCT axial images through the airways?

A

CT Bronchography

26
Q

What is a specialized CT evaluation of the large intestine used primarily for colon cancer screening?

A

CT Colongraphy

27
Q

What specialized CT evaluation of the large intestine is extended and scanned with thin-section CT?

2D and 3D models are constructed, including virtual endoscopic fly-through views.

A

CT Colongraphy

28
Q

What is a specialized CT examination of the bladder whereby iodinated contrast material is administrated directly under gravity into the bladder via Foley catheter?

A

CT Cystography

29
Q

What is the approximate measure of the radiation dose received in a single CT section or slice?

A

CT Dose Index (CTDI)

30
Q

What does CTDI stand for?

A

CT Dose Index (CTDI)

31
Q

What is a specialized CT evaluation of the small bowel whereby enteral contrast material is administered directly into the duodenum through a nasogastric catheter placed under fluoroscopic guidance?

A

CT Enteroclysis

32
Q

What is a specialized CT evaluation of the small bowel after the oral administration of low-density (0.1%) barium?

A

CT Enterography

33
Q

What percentage is low-density barium?

A

0.1%

34
Q

What is continuous, real-time CT imaging used predominantly for CT-guided interventional procedures?

A

CT Fluoroscopy

35
Q

CT evaluation of the spinal cord and nerve roots after the intrathecal administration of iodinated contrast material?

A

CT Myelography

36
Q

What is the relative value assigned to each pixel to quantify the attenuation occurring in each voxel in comparison with the attenuation of water?

A

CT Number

37
Q

The calculated CT number for a given pixel is given in?

A

Housfield Units (HU)

38
Q

What does HU stand for?

A

Housfield Units (HU)

39
Q

What may also be referred to as Pixel Value?

A

CT Number (Hounsfield Units {HU})

40
Q

What is the CT angiographic assessment of the peripheral arterial tree from the renal arteries through the lower extremities?

A

CT Runoff

41
Q

What is the process of obtaining anatomic information with CT imaging that is used to calculate the beam arrangement for radiotherapy?

A

CT Simulation

42
Q

What is a comprehensive, multiphasic CT evaluation of the urinary tract?

A

CT Urogram

43
Q

What primarily consists of pre-contrast, post-contrast, and delayed CT acquisitions through the kidneys, ureters, and bladder?

A

CT Urogram

44
Q

What is commonly referred to as a CT-IVP?

A

CT Urogram

45
Q

What is an error occurring in the superior portion of the skull, where dense bone averages with the low-attenuating brain tissue?

A

Cupping Artifact

46
Q

What partial volume artifact may result in abnormally dense-appearing brain parenchyma?

A

Cupping Artifact

Mosby's CT Definitions (20 decks)

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