Deck 16: Special Procedures

Question 1

EPID can: I.use MV and kV
II)take orthogonal images
III)send images to multiple locations

A) I and II
B) II and III
C) I and III
D) I,II,and III

Answer 1

B
EPID uses only MV to create beam's-eye view images.

Question 2

Heavy charged particles like protons have a(n)_____________ in tissue that is desirable.

A) continuous fall-off
B) sharp fall-off
C) shortened fall-off
D) absent fall-off

Answer 2

B
An advantage of proton treatment is the Bragg Peak and the sharp fall-off.

Question 3

Turning the radiation on and off when the target is within the treatment volume represents:

A) a fiducial system
B) gated treatments
C) a 4DCT data set
D) forced shallow breathing

Answer 3

B
Gated treatments are performed when the radiation is turned on when the target is in the treatment volume and turned off when the target is outside the treatment volume.

Question 4

Forced shallow breathing technique is used to control:

A) compression
B) imaging
C) motion
D) interfraction dose

Question 5

A single fraction of radiation to a brain metastasis would be what kind of stereotactic treatment?

A) stereotactic radiation therapy (SRT)
B) stereotactic body radiation therapy (SBRT)
C) stereotactic radiosurgery (SRS)

Question 6

The kV images are preferred by radiation therapists and radiation oncologists because the:

A) contrast is better
B) metal artifacts are reduced
C) timing is more efficient
D) resolution is not an issue

Question 7

The motion management method that defines an internal target volume is:

A) OBI
B) compression
C) conservative
D) MIP

Question 8

Besides the patient and reference frame being registered,the stereotactic treatment must also:

A) control motion
B) conform to the fiducial
C) increase target volume
D) reduce treatment time

Question 9

Cranial stereotactic treatments began with the:

A) CyberKnife
B) proton accelerator
C) Gamma Knife
D) SBRT

Question 10

TomoTherapy differs from some other volumetric imaging techniques because it:

A) is both a CT and a linear accelerator
B) uses kV and MV imaging
C) delivers customized fields
D) uses the same source for imaging and treating

Question 11

Radiation oncology goals include all of the following except:

A) reduce side effects
B) deliver accurate and precise treatments
C) increase toxic effects
D) all of the above

Question 12

Stereotactic treatments have been improved on linear accelerators because of advances in:

A) high-quality in-room imaging
B) tighter mechanical specifications
C) small field treatments
D) a and b only

Question 13

The CyberKnife can treat anywhere in the body because it uses a(n)___________ technique.

A) nonisocentric
B) repetitive
C) real-time
D) isocentric

Question 14

For the ultrasound unit to know where it is in reference to the linear accelerator,it must be ________________ with the treatment delivery unit.

A) localized
B) attenuated
C) B-moded
D) registered

Question 15

Cone beam CT,TomoTherapy,and CT-on rails correct for:

A) interfraction motion
B) intrafaction motion

Question 16

Protons are:

A) highly imaged
B) heavy charged particles
C) extended range
D) electrons

Question 17

Organs that can be affected by motion are the: I.lung
II)liver
III)pancreas

A) I and II
B) II and III
C) I and III
D) I,II,and III

Question 18

The only approach to managing motion that allows for real-time feedback is:

A) 4DCT
B) gated treatment
C) RPM system
D) electromagnetic transponder

Question 19

Devices that are on the linear accelerator for imaging include all of the following except:

A) OBI
B) EPID
C) CT-on-rails
D) CBCT

Question 20

Respiratory motion can be managed by: I.rapid CT scanning
II)4DCT
III)two-breath-hold CT

A) I and II
B) II and III
C) I and III
D) I,II,and III

Question 21

IGRT is useful because it can: I.result in a more focused treatment
II)account for interfraction and intrafraction motion
III)compare in-room image set with treatment planning image set

A) I and II
B) II and III
C) I and III
D) I,II,and III

Question 22

A process that aligns multiple data sets into a single coordinate system so that the spatial locations of corresponding points coincide is:

A) registration
B) recombination
C) IGRT
D) MIP

Question 23

Deformable image registration is easier than rigid body registration.

Question 24

Cone beam CT:

A) uses a fan beam
B) has a 3D extended digital array
C) has an area detector with 2D extended digital array
D) has multiple rotational speeds