Imaging in Cancer

Question 1

Barium Meal

Answer 1

A diagnostic test used to detect abnormalities of the oesophagus, stomach and small bowel (Barrett’s oesophagus)

Question 2

Barium Enema

Answer 2

an X ray exam that can detect changes or abnormalities in the large intestine (cancer)

Question 3

Single Contrast is preferred when______

Answer 3

The patient is unable to turn quickly or effectively
Only the position and length is required
Evaluating a post-operative leak or opening in the colon

Question 4

Double Contrast is used for ______

Answer 4

The detection of polyps and colorectal cancer
Colonoscopy failed
To visualise structure better

Question 5

Double contrast consist of ________

Answer 5

Positive contrast (barium sulphate) and negative contrast (CO2)

Question 6

What is a CT colonography

Answer 6

Virtual colonoscopy which uses beams and a set of electronic x-ray detectors that rotate and measures the amount of radiation being absorbed

Question 7

What is a CT colonography used for

Answer 7

Large bowel imaging

Question 8

How are compounds in CT measured

Answer 8

Assigned a Hounsfield unit

Question 9

What is the Hounsfield unit for water

Answer 9

0

Question 10

What is Gastrografin

Answer 10

Contrast agent used to exclude a leak (anastomosis)

Question 11

Iodine is used in a CT as a contrast agent if _____

Answer 11

Tumour or metastases is detected

Question 12

CT scans can also be used for_____

Answer 12

Staging

Question 13

Cannot be used in organs with peristalsis such as oesophagus and stomach

Answer 13

MRI

Question 14

Lung appears black because this imaging depends on H+/protons

Answer 14

MRI

Question 15

How does an MRI work

Answer 15

Aligns protons in one direction
Displaces protons through radiofrequency
Measure time protons take to come back

Question 16

What contrast is used in MRI

Answer 16

Gadolinum

Question 17

What process does PET detect

Answer 17

Metabolic process

Question 18

What organ is the PET scan not used in and why

Answer 18

Brain- very metabolic structure

Question 19

What type of images does a PET scan produce

Answer 19

Detailed 3D images

Question 20

What other scan is a PET commonly combined with

Answer 20

CE=T

Question 21

How does a PET scan work

Answer 21

Detects radiation given off by tracer injected into patient

Question 22

What is the radiotracer used in PET scans

Answer 22

Fluorodeoxyglucose

Question 23

WHO principles of screening

Answer 23

IRUTTIFCR
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