Imaging and Oncology Flashcards Preview

Oncology > Imaging and Oncology > Flashcards

Flashcards in Imaging and Oncology Deck (32)
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1
Q

Most common imaging. Uses ionizing radiation.

A

xrays

2
Q

Good for bones, kidney/gallstones, lungs. Not as good for soft tissues and brain

A

xrays

3
Q

Most common location for bone lesions

A

metaphysis

4
Q

What does stippled calcification on xray indicate?

A

cartilage

5
Q

What does ground glass appearance of bone on xray indicate?

A

fibrous dysplasia

6
Q

T/F if you see a lesion surrounded by a reactive cortical rim, the lesion is most likely malignant

A

false it is most likely benign

7
Q

Can differentiate structures of close physical density. Eliminates superimposition of organs. Show calcified and hemorrhagic lesions. Can be shown in multiple planes or even as a 3D image

A

CT scans

8
Q

Good for evaluation of masses in the chest, screening for colorectal tumors, intracranial neoplasms, and staging abdominal cancer

A

CT scans

9
Q

Usually done with CT. Requires bowel prep, no need for sedation, cannot do biopsies

A

virtual colonoscopy

10
Q

Continuous X-rays used to obtain real time moving images of internal structures. Can use to help guide fine needle biopsies. Prolonged procedures can lead to skin burns. Small cancer risk

A

fluoroscopy

11
Q

uses low energy xrays to generate images

A

mammography

12
Q

T/F normal breast tissue has masses

A

true it isn’t homogenous

13
Q

Cause of most abnormal mammogram findings

A

benign changes

14
Q

Radio-isotope is injected intravenously. 3 hours later the patient is scanned with a gamma camera. Provides a 2 dimensional image

A

Bone scans

15
Q

Measures bone metabolism or remodeling

A

bone scans

16
Q

What will arthritis look like on bone scan?

A

hot spots around joints

17
Q

Especially useful in lymphomas and lung cancers

A

PET scans

18
Q

Can marrow replacing tumors be visualized on bone scans?

A

they are cold (unseen) until cortical disruption occurs

19
Q

Detects active, rapidly growing tumors. Used to detect metastatic disease. assess response to cancer treatment

A

PET scans

20
Q

Good for small spinal lesions (osteoid osteoma and osteoblastoma)

A

SPECT scan

21
Q

Type of MRI where water is dark, fat is bright

A

T1 scans

22
Q

Type of MRI where water is bright and fat is dark

A

T2 scans

23
Q

MRI that is better at detecting tumors and infarcts

A

T2

24
Q

improve visibility of structures, especially small tumors that don’t cause much edema

A

contrast agents (usually gadolinium)

25
Q

High frequency sound waves. Reflect an echo off of tissues. Usually seen as 2D image

A

Ultrasound

26
Q

Recommended for 30 pack year smoking h/o

A

low dose CT

27
Q

Best means to find early curable cancers - cancers too small to be detected by touch in the breasts.

A

Mammograms

28
Q

Only breast screening found to decrease mortality

A

mammography

29
Q

Describe the stages of tumors

A

0-in situ. 1-localized. 2-early locally advanced. 3- late locally advanced. IV-metastatic

30
Q

Where are mets of the spine usually seen on xrays?

A

base of pedicles (winking owl sign)

31
Q

Best predictor of survival after cancer treatment

A

PET scans

32
Q

How would you work up a 1 cm nodule in healthy 40 y/o male, former smoker – hit in right chest by a softball?

A

PET scan (30% chance of being malignant)